openemr bug 444 fix

[openemr.git] / library / clinical_rules.php

<?php
/**
 * Clinical Decision Rules(CDR) engine functions.
 *
 * These functions should not ever attempt to write to
 * session variables, because the session_write_close() function
 * is typically called before utilizing these functions.
 *
 * Copyright (C) 2010-2012 Brady Miller <brady@sparmy.com>
 * Copyright (C) 2011      Medical Information Integration, LLC
 * Copyright (C) 2011      Ensofttek, LLC
 *
 * LICENSE: This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://opensource.org/licenses/gpl-license.php>;.
 *
 * @package OpenEMR
 * @author  Brady Miller <brady@sparmy.com>
 * @author  Medical Information Integration, LLC
 * @author  Ensofttek, LLC
 * @link    http://www.open-emr.org
 */

require_once(dirname(__FILE__) . "/patient.inc");
require_once(dirname(__FILE__) . "/forms.inc");
require_once(dirname(__FILE__) . "/formdata.inc.php");
require_once(dirname(__FILE__) . "/options.inc.php");
require_once(dirname(__FILE__) . "/report_database.inc");

// This is only pertinent for users of php versions less than 5.2
//  (ie. this wrapper is only loaded when php version is less than
//   5.2; otherwise the native php json functions are used)
require_once(dirname(__FILE__) . "/jsonwrapper/jsonwrapper.php");

/**
 * Return listing of CDR reminders in log.
 *
 * @param  string   $begin_date  begin date (optional)
 * @param  string   $end_date    end date (optional)
 * @return sqlret                sql return query
 */
function listingCDRReminderLog($begin_date='',$end_date='') {

  if (empty($end_date)) {
    $end_date=date('Y-m-d H:i:s');
  }

  $sqlArray = array();
  $sql = "SELECT `date`, `pid`, `uid`, `category`, `value`, `new_value` FROM `clinical_rules_log` WHERE `date` <= ?";
  array_push($sqlArray,$end_date);
  if (!empty($begin_date)) {
    $sql .= " AND `date` >= ?";
    array_push($sqlArray,$begin_date);
  }
  $sql .= " ORDER BY `date` DESC"; 

  return sqlStatement($sql,$sqlArray);

}

/**
 * Display the clinical summary widget.
 *
 * @param  integer  $patient_id     pid of selected patient
 * @param  string   $mode           choose either 'reminders-all' or 'reminders-due' (required)
 * @param  string   $dateTarget     target date (format Y-m-d H:i:s). If blank then will test with current date as target.
 * @param  string   $organize_mode  Way to organize the results (default or plans)
 * @param  string   $user           If a user is set, then will only show rules that user has permission to see.
 */
function clinical_summary_widget($patient_id,$mode,$dateTarget='',$organize_mode='default',$user='') {
  
  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Collect active actions
  $actions = test_rules_clinic('','passive_alert',$dateTarget,$mode,$patient_id,'',$organize_mode, array(),'primary',NULL,NULL,$user);

  // Display the actions
  $current_targets = array();
  foreach ($actions as $action) {

    // Deal with plan names first
    if (isset($action['is_plan']) && $action['is_plan'])  {
      echo "<br><b>";
      echo htmlspecialchars( xl("Plan"), ENT_NOQUOTES) . ": ";
      echo generate_display_field(array('data_type'=>'1','list_id'=>'clinical_plans'),$action['id']);
      echo "</b><br>";
      continue;
    }

    // Collect the Rule Title, Rule Developer, Rule Funding Source, and Rule Release and show it when hover over the item.
    $tooltip = '';
    if (!empty($action['rule_id'])) {
      $rule_title = getListItemTitle("clinical_rules",$action['rule_id']);
      $ruleData = sqlQuery("SELECT `developer`, `funding_source`, `release_version`, `web_reference` " .
                           "FROM `clinical_rules` " .
                           "WHERE  `id`=? AND `pid`=0", array($action['rule_id']) );
      $developer = $ruleData['developer'];
      $funding_source = $ruleData['funding_source'];
      $release = $ruleData['release_version'];
      $web_reference = $ruleData['web_reference'];
      if (!empty($rule_title)) {
        $tooltip = xla('Rule Title') . ": " . attr($rule_title) . "&#013;";
      }
      if (!empty($developer)) {
        $tooltip .= xla('Rule Developer') . ": " . attr($developer) . "&#013;";
      }
      if (!empty($funding_source)) {
        $tooltip .= xla('Rule Funding Source') . ": " . attr($funding_source) . "&#013;";
      }
      if (!empty($release)) {
        $tooltip .= xla('Rule Release') . ": " . attr($release);
      }
      if ( (!empty($tooltip)) || (!empty($web_reference)) ) {
        if (!empty($web_reference)) {
          $tooltip = "<a href='".attr($web_reference)."' target='_blank' style='white-space: pre-line;' title='".$tooltip."'>?</a>";
        }
        else {
          $tooltip = "<span style='white-space: pre-line;' title='".$tooltip."'>?</span>";
        }
      }
    }

    if ($action['custom_flag']) {
      // Start link for reminders that use the custom rules input screen
      $url = "../rules/patient_data.php?category=".htmlspecialchars( $action['category'], ENT_QUOTES);
          $url .= "&item=".htmlspecialchars( $action['item'], ENT_QUOTES);
      echo "<a href='".$url."' class='iframe medium_modal' onclick='top.restoreSession()'>";
    }
    else if ($action['clin_rem_link']) {
      // Start link for reminders that use the custom rules input screen
          $pieces_url = parse_url($action['clin_rem_link']);
          $url_prefix = $pieces_url['scheme'];
          if($url_prefix == 'https' || $url_prefix == 'http'){
                echo "<a href='" . $action['clin_rem_link'] .
        "' class='iframe  medium_modal' onclick='top.restoreSession()'>";
          }else{
                echo "<a href='../../../" . $action['clin_rem_link'] .
        "' class='iframe  medium_modal' onclick='top.restoreSession()'>";
          }
    }
    else {
      // continue since no link is needed
    }

    // Display Reminder Details
    echo generate_display_field(array('data_type'=>'1','list_id'=>'rule_action_category'),$action['category']) .
      ": " . generate_display_field(array('data_type'=>'1','list_id'=>'rule_action'),$action['item']);

    if ($action['custom_flag'] || $action['clin_rem_link']) {
      // End link for reminders that use an html link
      echo "</a>";
    }

    // Display due status
    if ($action['due_status']) {
      // Color code the status (red for past due, purple for due, green for not due and black for soon due)
      if ($action['due_status'] == "past_due") {
        echo "&nbsp;&nbsp;(<span style='color:red'>";
      }
      else if ($action['due_status'] == "due") {
        echo "&nbsp;&nbsp;(<span style='color:purple'>";
      }
      else if ($action['due_status'] == "not_due") {
        echo "&nbsp;&nbsp;(<span style='color:green'>";
      }
      else {
        echo "&nbsp;&nbsp;(<span>";
      }
      echo generate_display_field(array('data_type'=>'1','list_id'=>'rule_reminder_due_opt'),$action['due_status']) . "</span>)";
    }

    // Display the tooltip
    if (!empty($tooltip)) {
      echo "&nbsp;".$tooltip."<br>";
    }
    else {
      echo "<br>";
    }

    // Add the target(and rule id and room for future elements as needed) to the $current_targets array.
    // Only when $mode is reminders-due
    if ($mode == "reminders-due" && $GLOBALS['enable_alert_log']) {
      $target_temp = $action['category'].":".$action['item'];
      $current_targets[$target_temp] =  array('rule_id'=>$action['rule_id'],'due_status'=>$action['due_status']);
    }
  }

  // Compare the current with most recent action log (this function will also log the current actions)
  // Only when $mode is reminders-due
  if ($mode == "reminders-due" && $GLOBALS['enable_alert_log'] ) {
    $new_targets = compare_log_alerts($patient_id,$current_targets,'clinical_reminder_widget',$_SESSION['authId']);
    if (!empty($new_targets) && $GLOBALS['enable_cdr_new_crp']) {
      // If there are new action(s), then throw a popup (if the enable_cdr_new_crp global is turned on)
      //  Note I am taking advantage of a slight hack in order to run javascript within code that
      //  is being passed via an ajax call by using a dummy image.
      echo '<img src="../../pic/empty.gif" onload="alert(\''.xls('New Due Clinical Reminders').'\n\n';
      foreach ($new_targets as $key => $value) {
        $category_item = explode(":",$key);
        $category = $category_item[0];
        $item = $category_item[1];
        echo generate_display_field(array('data_type'=>'1','list_id'=>'rule_action_category'),$category) .
             ': ' . generate_display_field(array('data_type'=>'1','list_id'=>'rule_action'),$item). '\n';
      }
      echo '\n' . '('. xls('See the Clinical Reminders widget for more details'). ')';
      echo '\');this.parentNode.removeChild(this);" />';
    }
  }
}

/**
 * Display the active screen reminder.
 *
 * @param  integer  $patient_id     pid of selected patient
 * @param  string   $mode           choose either 'reminders-all' or 'reminders-due' (required)
 * @param  string   $dateTarget     target date (format Y-m-d H:i:s). If blank then will test with current date as target.
 * @param  string   $organize_mode  Way to organize the results (default or plans)
 * @param  string   $user           If a user is set, then will only show rules that user has permission to see
 * @param  string   $test           Set to true when only checking if there are alerts (skips the logging then)
 * @return string                   html display output.
 */
function active_alert_summary($patient_id,$mode,$dateTarget='',$organize_mode='default',$user='',$test=FALSE) {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Collect active actions
  $actions = test_rules_clinic('','active_alert',$dateTarget,$mode,$patient_id,'',$organize_mode, array(),'primary',NULL,NULL,$user);

  if (empty($actions)) {
    return false;
  }

  $returnOutput = "";
  $current_targets = array();

  // Display the actions
  foreach ($actions as $action) {

    // Deal with plan names first
    if ($action['is_plan']) {
      $returnOutput .= "<br><b>";
      $returnOutput .= htmlspecialchars( xl("Plan"), ENT_NOQUOTES) . ": ";
      $returnOutput .= generate_display_field(array('data_type'=>'1','list_id'=>'clinical_plans'),$action['id']);
      $returnOutput .= "</b><br>";
      continue;
    }

    // Display Reminder Details
    $returnOutput .= generate_display_field(array('data_type'=>'1','list_id'=>'rule_action_category'),$action['category']) .
      ": " . generate_display_field(array('data_type'=>'1','list_id'=>'rule_action'),$action['item']);

    // Display due status
    if ($action['due_status']) {
      // Color code the status (red for past due, purple for due, green for not due and black for soon due)
      if ($action['due_status'] == "past_due") {
        $returnOutput .= "&nbsp;&nbsp;(<span style='color:red'>";
      }
      else if ($action['due_status'] == "due") {
        $returnOutput .= "&nbsp;&nbsp;(<span style='color:purple'>";
      }
      else if ($action['due_status'] == "not_due") {
        $returnOutput .= "&nbsp;&nbsp;(<span style='color:green'>";
      }
      else {
        $returnOutput .= "&nbsp;&nbsp;(<span>";
      }
        $returnOutput .= generate_display_field(array('data_type'=>'1','list_id'=>'rule_reminder_due_opt'),$action['due_status']) . "</span>)<br>";
    }
    else {
      $returnOutput .= "<br>";
    }

    // Add the target(and rule id and room for future elements as needed) to the $current_targets array.
    // Only when $mode is reminders-due and $test is FALSE
    if (($mode == "reminders-due") && ($test === FALSE) && ($GLOBALS['enable_alert_log'])) {
      $target_temp = $action['category'].":".$action['item'];
      $current_targets[$target_temp] =  array('rule_id'=>$action['rule_id'],'due_status'=>$action['due_status']);
    }
  }

  // Compare the current with most recent action log (this function will also log the current actions)
  // Only when $mode is reminders-due and $test is FALSE
  if (($mode == "reminders-due") && ($test === FALSE) && ($GLOBALS['enable_alert_log'])) {
    $new_targets = compare_log_alerts($patient_id,$current_targets,'active_reminder_popup',$_SESSION['authId']);
    if (!empty($new_targets)) {
      $returnOutput .="<br>" . xlt('New Items (see above for details)') . ":<br>";
      foreach ($new_targets as $key => $value) {
        $category_item = explode(":",$key);
        $category = $category_item[0];
        $item = $category_item[1];
        $returnOutput .= generate_display_field(array('data_type'=>'1','list_id'=>'rule_action_category'),$category) .
             ': ' . generate_display_field(array('data_type'=>'1','list_id'=>'rule_action'),$item). '<br>';
      }
    }
  }  

  return $returnOutput;
}

/**
 * Process and return allergy conflicts (when a active medication or presciption is on allergy list).
 *
 * @param  integer  $patient_id     pid of selected patient
 * @param  string   $mode           either 'all' or 'new' (required)
 * @param  string   $user           If a user is set, then will only show rules that user has permission to see
 * @param  string   $test           Set to true when only checking if there are alerts (skips the logging then)
 * @return  array/boolean           Array of allergy alerts or FALSE is empty.
 */
function allergy_conflict($patient_id,$mode,$user,$test=FALSE) {

  // Collect allergies
  $res_allergies = sqlStatement("SELECT `title` FROM `lists` WHERE `type`='allergy' " .
                                "AND `activity`=1 " .
                                "AND ( `enddate` IS NULL OR `enddate`='' OR `enddate` > NOW() ) " .
                                "AND `pid`=?", array($patient_id));
  $allergies = array();
  for($iter=0; $row=sqlFetchArray($res_allergies); $iter++) {
    $allergies[$iter]=$row['title'];
  }

  // Build sql element of IN for below queries
  $sqlParam = array();
  $sqlIN = '';
  $firstFlag = TRUE;
  foreach ($allergies as $allergy) {
    array_push($sqlParam,$allergy);
    if ($firstFlag) {
      $sqlIN .= "?";
      $firstFlag = FALSE;
    }
    else {
      $sqlIN .= ",?";
    }
  } 

  // Check if allergies conflict with medications or prescriptions
  $conflicts_unique = array();
  if (!empty($sqlParam)) {
    $conflicts = array();
    array_push($sqlParam,$patient_id);
    $res_meds = sqlStatement("SELECT `title` FROM `lists` WHERE `type`='medication' " .
                             "AND `activity`=1 " .
                             "AND ( `enddate` IS NULL OR `enddate`='' OR `enddate` > NOW() ) " .
                             "AND `title` IN (" . $sqlIN . ") AND `pid`=?", $sqlParam);
    while ($urow = sqlFetchArray($res_meds)) {
      array_push($conflicts, $urow['title']);
    }
    $res_rx = sqlStatement("SELECT `drug` FROM `prescriptions` WHERE `active`=1 " .
                           "AND `drug` IN (" . $sqlIN . ") AND `patient_id`=?", $sqlParam);
    while ($urow = sqlFetchArray($res_rx)) {
      array_push($conflicts, $urow['drug']);
    }
    if (!empty($conflicts)) {
      $conflicts_unique = array_unique($conflicts);
    }
  }
 
  // If there are conflicts, $test is FALSE, and alert logging is on, then run through compare_log_alerts
  $new_conflicts = array();
  if ( (!empty($conflicts_unique)) && $GLOBALS['enable_alert_log'] && ($test===FALSE) ) {
    $new_conflicts = compare_log_alerts($patient_id,$conflicts_unique,'allergy_alert',$_SESSION['authId'],$mode);
  }

  if ($mode == 'all') {
    if (!empty($conflicts_unique)) {
      return $conflicts_unique;
    }
    else {
      return FALSE;
    }
  }
  else { // $mode = 'new'
    if (!empty($new_conflicts)) {
      return $new_conflicts;
    }
    else {
      return FALSE;
    }
  }
}

/**
 * Compare current alerts with prior (in order to find new actions)
 * Also functions to log the actions.
 *
 * @param  integer  $patient_id      pid of selected patient
 * @param  array    $current_targets array of targets
 * @param  string   $category        clinical_reminder_widget, active_reminder_popup, or allergy_alert
 * @param  integer  $userid          user id of user.
 * @param  string   $log_trigger     if 'all', then always log. If 'new', then only trigger log when a new item noted.
 * @return array                     array with targets with associated rule.
 */
function compare_log_alerts($patient_id,$current_targets,$category='clinical_reminder_widget',$userid='',$log_trigger='all') {

  if (empty($userid)) {
    $userid = $_SESSION['authId'];
  }

  if (empty($current_targets)) {
    $current_targets = array();
  }

  // Collect most recent action_log
  $prior_targets_sql = sqlQuery("SELECT `value` FROM `clinical_rules_log` " .
                                 "WHERE `category` = ? AND `pid` = ? AND `uid` = ? " .
                                 "ORDER BY `id` DESC LIMIT 1", array($category,$patient_id,$userid) );
  $prior_targets = array();
  if (!empty($prior_targets_sql['value'])) {
    $prior_targets = json_decode($prior_targets_sql['value'], true);
  }

  // Compare the current with most recent log
  if ( ($category == 'clinical_reminder_widget') || ($category == 'active_reminder_popup') ) {
    //using fancy structure to store multiple elements
    $new_targets = array_diff_key($current_targets,$prior_targets);
  }
  else { // $category == 'allergy_alert'
    //using simple array
    $new_targets = array_diff($current_targets,$prior_targets);
  }

  // Store current action_log and the new items
  //  If $log_trigger=='all'
  //  or If $log_trigger=='new' and there are new items 
  if ( ($log_trigger=='all') || (($log_trigger=='new')  && (!empty($new_targets))) ) {
    $current_targets_json = json_encode($current_targets);
    $new_targets_json = '';
    if (!empty($new_targets)) {
      $new_targets_json = json_encode($new_targets);
    }
    sqlInsert("INSERT INTO `clinical_rules_log` " .
              "(`date`,`pid`,`uid`,`category`,`value`,`new_value`) " .
              "VALUES (NOW(),?,?,?,?,?)", array($patient_id,$userid,$category,$current_targets_json,$new_targets_json) );
  }

  // Return new actions (if there are any)
  return $new_targets;
}

/**
 * Process clinic rules via a batching method to improve performance and decrease memory overhead.
 *
 * Test the clinic rules of entire clinic and create a report or patient reminders (can also test
 * on one patient or patients of one provider). The structure of the returned results is dependent on the
 * $organize_mode and $mode parameters.
 * <pre>The results are dependent on the $organize_mode parameter settings
 *   'default' organize_mode:
 *     Returns a two-dimensional array of results organized by rules (dependent on the following $mode settings):
 *       'reminders-due' mode - returns an array of reminders (action array elements plus a 'pid' and 'due_status')
 *       'reminders-all' mode - returns an array of reminders (action array elements plus a 'pid' and 'due_status')
 *       'report' mode        - returns an array of rows for the Clinical Quality Measures (CQM) report
 *   'plans' organize_mode:
 *     Returns similar to default, but organizes by the active plans
 * </pre>
 *
 * @param  integer      $provider      id of a selected provider. If blank, then will test entire clinic. If 'collate_outer' or 'collate_inner', then will test each provider in entire clinic; outer will nest plans  inside collated providers, while inner will nest the providers inside the plans (note inner and outer are only different if organize_mode is set to plans).
 * @param  string       $type          rule filter (active_alert,passive_alert,cqm,cqm_2011,cqm_2014,amc,amc_2011,amc_2014,patient_reminder). If blank then will test all rules.
 * @param  string/array $dateTarget    target date (format Y-m-d H:i:s). If blank then will test with current date as target. If an array, then is holding two dates ('dateBegin' and 'dateTarget').
 * @param  string       $mode          choose either 'report' or 'reminders-all' or 'reminders-due' (required)
 * @param  string       $plan          test for specific plan only
 * @param  string       $organize_mode Way to organize the results (default, plans). See above for organization structure of the results.
 * @param  array        $options       can hold various option (for now, used to hold the manual number of labs for the AMC report)
 * @param  string       $pat_prov_rel  How to choose patients that are related to a chosen provider. 'primary' selects patients that the provider is set as primary provider. 'encounter' selectes patients that the provider has seen. This parameter is only applicable if the $provider parameter is set to a provider or collation setting.
 * @param  integer      $batchSize     number of patients to batch (default is 100; plan to optimize this default setting in the future)
 * @param  integer      $report_id     id of report in database (if already bookmarked)
 * @return array                       See above for organization structure of the results.
 */
function test_rules_clinic_batch_method($provider='',$type='',$dateTarget='',$mode='',$plan='',$organize_mode='default',$options=array(),$pat_prov_rel='primary',$batchSize='',$report_id=NULL) {

  // Default to a batchsize, if empty
  if (empty($batchSize)) {
    $batchSize=100;
  }

  // Collect total number of pertinent patients (to calculate batching parameters)
  $totalNumPatients = buildPatientArray('',$provider,$pat_prov_rel,NULL,NULL,TRUE);

  // Cycle through the batches and collect/combine results
  if (($totalNumPatients%$batchSize) > 0) {
    // not perfectly divisible
    $totalNumberBatches = floor($totalNumPatients/$batchSize) + 1;
  }
  else {
    // perfectly divisible
    $totalNumberBatches = floor($totalNumPatients/$batchSize);
  }

  // Fix things in the $options array(). This now stores the number of labs to be used in the denominator in the AMC report.
  // The problem with this variable is that is is added in every batch. So need to fix it by dividing this number by the number
  // of planned batches(note the fixed array will go into the test_rules_clinic function, however the original will be used
  // in the report storing/tracking engine.
  $options_modified=$options;
  if (!empty($options_modified['labs_manual'])) {
    $options_modified['labs_manual'] = $options_modified['labs_manual'] / $totalNumberBatches;
  }

  // Prepare the database to track/store results
  $fields = array('provider'=>$provider,'mode'=>$mode,'plan'=>$plan,'organize_mode'=>$organize_mode,'pat_prov_rel'=>$pat_prov_rel);
  if (is_array($dateTarget)) {
    $fields = array_merge($fields,array(date_target=>$dateTarget['dateTarget']));
    $fields = array_merge($fields,array(date_begin=>$dateTarget['dateBegin']));
  }
  else {
    if (empty($dateTarget)) {
      $fields = array_merge($fields,array(date_target=>date("Y-m-d H:i:s")));
    }
    else {
      $fields = array_merge($fields,array(date_target=>$dateTarget));
    }
  }
  if (!empty($options)) {
    foreach ($options as $key => $value) {
      $fields = array_merge($fields, array($key=>$value));
    }
  }
  $report_id = beginReportDatabase($type,$fields,$report_id);
  setTotalItemsReportDatabase($report_id,$totalNumPatients);

  // Set ability to itemize report if this feature is turned on
  if ( ( ($type == "active_alert" || $type == "passive_alert")          && ($GLOBALS['report_itemizing_standard']) ) ||
       ( ($type == "cqm" || $type == "cqm_2011" || $type == "cqm_2014") && ($GLOBALS['report_itemizing_cqm'])      ) ||
       ( ($type == "amc" || $type == "amc_2011" || $type == "amc_2014" || $type == "amc_2014_stage1" || $type == "amc_2014_stage2") && ($GLOBALS['report_itemizing_amc'])      ) ) {
    $GLOBALS['report_itemizing_temp_flag_and_id'] = $report_id;
  }
  else {
    $GLOBALS['report_itemizing_temp_flag_and_id'] = 0;
  }

  for ($i=0;$i<$totalNumberBatches;$i++) {

    // If itemization is turned on, then reset the rule id iterator
    if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
      $GLOBALS['report_itemized_test_id_iterator'] = 1;
    }

    $dataSheet_batch = test_rules_clinic($provider,$type,$dateTarget,$mode,'',$plan,$organize_mode,$options_modified,$pat_prov_rel,(($batchSize*$i)+1),$batchSize);
    if ($i == 0) {
      // For first cycle, simply copy it to dataSheet
      $dataSheet = $dataSheet_batch;
    }
    else {
      //debug
      //error_log("CDR: ".print_r($dataSheet,TRUE),0);
      //error_log("CDR: ".($batchSize*$i)." records",0);

      // Integrate batch results into main dataSheet
      foreach ($dataSheet_batch as $key => $row) {
        if (!$row['is_sub']) {
          //skip this stuff for the sub entries (and use previous main entry in percentage calculation)
          $total_patients = $dataSheet[$key]['total_patients'] + $row['total_patients'];
          $dataSheet[$key]['total_patients'] = $total_patients;
          $excluded = $dataSheet[$key]['excluded'] + $row['excluded'];
          $dataSheet[$key]['excluded'] = $excluded;
          $pass_filter = $dataSheet[$key]['pass_filter'] + $row['pass_filter'];
          $dataSheet[$key]['pass_filter'] = $pass_filter;
        }
        $pass_target = $dataSheet[$key]['pass_target'] + $row['pass_target'];
        $dataSheet[$key]['pass_target'] = $pass_target;
        $dataSheet[$key]['percentage'] = calculate_percentage($pass_filter,$excluded,$pass_target);
      }
    }
    //Update database to track results
    updateReportDatabase($report_id,$total_patients);
  }

  // Record results in database and send to screen, if applicable.
  finishReportDatabase($report_id,json_encode($dataSheet));
  return $dataSheet;
}

/**
 * Process clinic rules.
 *
 * Test the clinic rules of entire clinic and create a report or patient reminders (can also test
 * on one patient or patients of one provider). The structure of the returned results is dependent on the
 * $organize_mode and $mode parameters.
 * <pre>The results are dependent on the $organize_mode parameter settings
 *   'default' organize_mode:
 *     Returns a two-dimensional array of results organized by rules (dependent on the following $mode settings):
 *       'reminders-due' mode - returns an array of reminders (action array elements plus a 'pid' and 'due_status')
 *       'reminders-all' mode - returns an array of reminders (action array elements plus a 'pid' and 'due_status')
 *       'report' mode        - returns an array of rows for the Clinical Quality Measures (CQM) report
 *   'plans' organize_mode:
 *     Returns similar to default, but organizes by the active plans
 * </pre>
 *
 * @param  integer      $provider      id of a selected provider. If blank, then will test entire clinic. If 'collate_outer' or 'collate_inner', then will test each provider in entire clinic; outer will nest plans  inside collated providers, while inner will nest the providers inside the plans (note inner and outer are only different if organize_mode is set to plans).
 * @param  string       $type          rule filter (active_alert,passive_alert,cqm,cqm_2011,cqm_2104,amc,amc_2011,amc_2014,patient_reminder). If blank then will test all rules. 
 * @param  string/array $dateTarget    target date (format Y-m-d H:i:s). If blank then will test with current date as target. If an array, then is holding two dates ('dateBegin' and 'dateTarget').
 * @param  string       $mode          choose either 'report' or 'reminders-all' or 'reminders-due' (required)
 * @param  integer      $patient_id    pid of patient. If blank then will check all patients.
 * @param  string       $plan          test for specific plan only
 * @param  string       $organize_mode Way to organize the results (default, plans). See above for organization structure of the results.
 * @param  array        $options       can hold various option (for now, used to hold the manual number of labs for the AMC report)
 * @param  string       $pat_prov_rel  How to choose patients that are related to a chosen provider. 'primary' selects patients that the provider is set as primary provider. 'encounter' selectes patients that the provider has seen. This parameter is only applicable if the $provider parameter is set to a provider or collation setting.
 * @param  integer      $start         applicable patient to start at (when batching process)
 * @param  integer      $batchSize     number of patients to batch (when batching process)
 * @param  string       $user          If a user is set, then will only show rules that user has permission to see(only applicable for per patient and not when do reports).
 * @return array                       See above for organization structure of the results.
 */
function test_rules_clinic($provider='',$type='',$dateTarget='',$mode='',$patient_id='',$plan='',$organize_mode='default',$options=array(),$pat_prov_rel='primary',$start=NULL,$batchSize=NULL,$user='') {

  // If dateTarget is an array, then organize them.
  if (is_array($dateTarget)) {
    $dateArray = $dateTarget;
    $dateTarget = $dateTarget['dateTarget'];
  }

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Prepare the results array
  $results = array();

  // If set the $provider to collate_outer (or collate_inner without plans organize mode),
  // then run through this function recursively and return results.
  if (($provider == "collate_outer") || ($provider == "collate_inner" && $organize_mode != 'plans')) {
    // First, collect an array of all providers
    $query = "SELECT id, lname, fname, npi, federaltaxid FROM users WHERE authorized = 1 ORDER BY lname, fname"; 
    $ures = sqlStatementCdrEngine($query);
    // Second, run through each provider recursively
    while ($urow = sqlFetchArray($ures)) {
      $newResults = test_rules_clinic($urow['id'],$type,$dateTarget,$mode,$patient_id,$plan,$organize_mode,$options,$pat_prov_rel,$start,$batchSize,$user);
      if (!empty($newResults)) {
        $provider_item['is_provider'] = TRUE;
        $provider_item['prov_lname'] = $urow['lname'];
        $provider_item['prov_fname'] = $urow['fname'];
        $provider_item['npi'] = $urow['npi'];
        $provider_item['federaltaxid'] = $urow['federaltaxid'];
        array_push($results,$provider_item);
        $results = array_merge($results,$newResults);
      }
    }
    // done, so now can return results
    return $results;
  }

  // If set organize-mode to plans, then collects active plans and run through this
  // function recursively and return results.
  if ($organize_mode == "plans") {
    // First, collect active plans
    $plans_resolve = resolve_plans_sql($plan,$patient_id);
    // Second, run through function recursively
    foreach ($plans_resolve as $plan_item) {
      //  (if collate_inner, then nest a collation of providers within each plan)
      if ($provider == "collate_inner") {
        // First, collect an array of all providers
        $query = "SELECT id, lname, fname, npi, federaltaxid FROM users WHERE authorized = 1 ORDER BY lname, fname";
        $ures = sqlStatementCdrEngine($query);
        // Second, run through each provider recursively
        $provider_results = array();
        while ($urow = sqlFetchArray($ures)) {
          $newResults = test_rules_clinic($urow['id'],$type,$dateTarget,$mode,$patient_id,$plan_item['id'],'default',$options,$pat_prov_rel,$start,$batchSize,$user);
          if (!empty($newResults)) {
            $provider_item['is_provider'] = TRUE;
            $provider_item['prov_lname'] = $urow['lname'];
            $provider_item['prov_fname'] = $urow['fname'];
            $provider_item['npi'] = $urow['npi'];
            $provider_item['federaltaxid'] = $urow['federaltaxid'];
            array_push($provider_results,$provider_item);
            $provider_results = array_merge($provider_results,$newResults);
          }
        }
        if (!empty($provider_results)) {
          $plan_item['is_plan'] = TRUE;
          array_push($results,$plan_item);
          $results = array_merge($results,$provider_results);
        }
      }
      else {
        // (not collate_inner, so do not nest providers within each plan)
        $newResults = test_rules_clinic($provider,$type,$dateTarget,$mode,$patient_id,$plan_item['id'],'default',$options,$pat_prov_rel,$start,$batchSize,$user);
        if (!empty($newResults)) {
          $plan_item['is_plan'] = TRUE;
          array_push($results,$plan_item);
          $results = array_merge($results,$newResults);
        }
      }
    }
    // done, so now can return results
    return $results;
  }

  // Collect applicable patient pids
  $patientData = array();
  $patientData = buildPatientArray($patient_id,$provider,$pat_prov_rel,$start,$batchSize);

  // Go through each patient(s)
  //
  //  If in report mode, then tabulate for each rule:
  //    Total Patients
  //    Patients that pass the filter
  //    Patients that pass the target
  //  If in reminders mode, then create reminders for each rule:
  //    Reminder that action is due soon
  //    Reminder that action is due
  //    Reminder that action is post-due
  
  //Collect applicable rules
  // Note that due to a limitation in the this function, the patient_id is explicitly
  //  for grouping items when not being done in real-time or for official reporting.
  //  So for cases such as patient reminders on a clinic scale, the calling function
  //  will actually need rather than pass in a explicit patient_id for each patient in
  //  a separate call to this function. 
  if ($mode != "report") {
    // Use per patient custom rules (if exist)
    // Note as discussed above, this only works for single patient instances.
    $rules = resolve_rules_sql($type,$patient_id,FALSE,$plan,$user);
  }
  else { // $mode = "report"
    // Only use default rules (do not use patient custom rules)
    $rules = resolve_rules_sql($type,$patient_id,FALSE,$plan,$user);
  }

  foreach( $rules as $rowRule ) {

    // If using cqm or amc type, then use the hard-coded rules set.
    // Note these rules are only used in report mode.
    if ($rowRule['cqm_flag'] || $rowRule['amc_flag']) {

      require_once( dirname(__FILE__)."/classes/rulesets/ReportManager.php");
      $manager = new ReportManager();
      if ($rowRule['amc_flag']) {
        // Send array of dates ('dateBegin' and 'dateTarget')
        $tempResults = $manager->runReport( $rowRule, $patientData, $dateArray, $options );
      }
      else {
        // Send target date
        $tempResults = $manager->runReport( $rowRule, $patientData, $dateTarget );
      }
      if (!empty($tempResults)) {
        foreach ($tempResults as $tempResult) {
          array_push($results,$tempResult);
        }
      }
 
      // Go on to the next rule
      continue;
    }

    // If in reminder mode then need to collect the measurement dates
    //  from rule_reminder table
    $target_dates = array();
    if ($mode != "report") {
      // Calculate the dates to check for
      if ($type == "patient_reminder") {
        $reminder_interval_type = "patient_reminder";
      }
      else { // $type == "passive_alert" or $type == "active_alert"
        $reminder_interval_type = "clinical_reminder";
      }
      $target_dates = calculate_reminder_dates($rowRule['id'], $dateTarget, $reminder_interval_type);
    }
    else { // $mode == "report"
      // Only use the target date in the report
      $target_dates[0] = $dateTarget;
    }

    //Reset the counters
    $total_patients = 0;
    $pass_filter = 0;
    $exclude_filter = 0;
    $pass_target = 0;

    // Find the number of target groups
    $targetGroups = returnTargetGroups($rowRule['id']);

    if ( (count($targetGroups) == 1) || ($mode == "report") ) {

      // If report itemization is turned on, then iterate the rule id iterator
      if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
        $GLOBALS['report_itemized_test_id_iterator']++;
      }

      //skip this section if not report and more than one target group
      foreach( $patientData as $rowPatient ) {

        // First, deal with deceased patients
        //  (for now will simply skip the patient)
        // If want to support rules for deceased patients then will need to migrate this below
        // in target_dates foreach(guessing won't ever need to do this, though).
        // Note using the dateTarget rather than dateFocus
        if (is_patient_deceased($rowPatient['pid'],$dateTarget)) {
          continue;
        }

        // Count the total patients
        $total_patients++;

        $dateCounter = 1; // for reminder mode to keep track of which date checking
        // If report itemization is turned on, reset flag.
        if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
          $temp_track_pass = 1;
        }
        foreach ( $target_dates as $dateFocus ) {

          //Skip if date is set to SKIP
          if ($dateFocus == "SKIP") {
            $dateCounter++;
            continue;
          }

          //Set date counter and reminder token (applicable for reminders only)
          if ($dateCounter == 1) {
            $reminder_due = "soon_due";
          }
          else if ($dateCounter == 2) {
            $reminder_due = "due";
          }
          else { // $dateCounter == 3
            $reminder_due = "past_due";
          }

          // Check if pass filter
          $passFilter = test_filter($rowPatient['pid'],$rowRule['id'],$dateFocus);
          if ($passFilter === "EXCLUDED") {
            // increment EXCLUDED and pass_filter counters
            //  and set as FALSE for reminder functionality.
            $pass_filter++;
            $exclude_filter++;
            $passFilter = FALSE;
          }
          if ($passFilter) {
            // increment pass filter counter
            $pass_filter++;
            // If report itemization is turned on, trigger flag.
            if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
              $temp_track_pass = 0; 
            }
          }
          else {
            $dateCounter++;
            continue;
          }

          // Check if pass target
          $passTarget = test_targets($rowPatient['pid'],$rowRule['id'],'',$dateFocus); 
          if ($passTarget) {
            // increment pass target counter
            $pass_target++;
            // If report itemization is turned on, then record the "passed" item and set the flag
            if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
              insertItemReportTracker($GLOBALS['report_itemizing_temp_flag_and_id'], $GLOBALS['report_itemized_test_id_iterator'], 1, $rowPatient['pid']); 
              $temp_track_pass = 1;
            }
            // send to reminder results
            if ($mode == "reminders-all") {
              // place the completed actions into the reminder return array
              $actionArray = resolve_action_sql($rowRule['id'],'1');
              foreach ($actionArray as $action) {
                $action_plus = $action;
                $action_plus['due_status'] = "not_due";
                $action_plus['pid'] = $rowPatient['pid'];
                $action_plus['rule_id'] = $rowRule['id'];
                $results = reminder_results_integrate($results, $action_plus);
              }
            }
            break;
          }
          else {
            // send to reminder results
            if ($mode != "report") {
              // place the uncompleted actions into the reminder return array
              $actionArray = resolve_action_sql($rowRule['id'],'1');
              foreach ($actionArray as $action) {
                $action_plus = $action;
                $action_plus['due_status'] = $reminder_due;
                $action_plus['pid'] = $rowPatient['pid'];
                $action_plus['rule_id'] = $rowRule['id'];
                $results = reminder_results_integrate($results, $action_plus);
              }
            }
          }
          $dateCounter++;
        }
        // If report itemization is turned on, then record the "failed" item if it did not pass
        if ($GLOBALS['report_itemizing_temp_flag_and_id'] && !($temp_track_pass)) {
          insertItemReportTracker($GLOBALS['report_itemizing_temp_flag_and_id'], $GLOBALS['report_itemized_test_id_iterator'], 0, $rowPatient['pid']);
        } 
      }
    }

    // Calculate and save the data for the rule
    $percentage = calculate_percentage($pass_filter,$exclude_filter,$pass_target);
    if ($mode == "report") {
      $newRow=array('is_main'=>TRUE,'total_patients'=>$total_patients,'excluded'=>$exclude_filter,'pass_filter'=>$pass_filter,'pass_target'=>$pass_target,'percentage'=>$percentage);
      $newRow=array_merge($newRow,$rowRule);

      // If itemization is turned on, then record the itemized_test_id 
      if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
        $newRow=array_merge($newRow,array('itemized_test_id'=>$GLOBALS['report_itemized_test_id_iterator']));
      }

      array_push($results, $newRow);
    }

    // Now run through the target groups if more than one
    if (count($targetGroups) > 1) {
      foreach ($targetGroups as $i) {

        // If report itemization is turned on, then iterate the rule id iterator
        if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
          $GLOBALS['report_itemized_test_id_iterator']++;
        }

        //Reset the target counter
        $pass_target = 0;

        foreach( $patientData as $rowPatient ) {

          // First, deal with deceased patients
          //  (for now will simply skip the patient)
          // If want to support rules for deceased patients then will need to migrate this below
          // in target_dates foreach(guessing won't ever need to do this, though).
          // Note using the dateTarget rather than dateFocus
          if (is_patient_deceased($rowPatient['pid'],$dateTarget)) {
            continue;
          }

          $dateCounter = 1; // for reminder mode to keep track of which date checking
          // If report itemization is turned on, reset flag.
          if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
            $temp_track_pass = 1;
          }
          foreach ( $target_dates as $dateFocus ) {

            //Skip if date is set to SKIP
            if ($dateFocus == "SKIP") {
              $dateCounter++;
              continue;
            }

            //Set date counter and reminder token (applicable for reminders only)
            if ($dateCounter == 1) {
              $reminder_due = "soon_due";
            }
            else if ($dateCounter == 2) {
              $reminder_due = "due";
            }
            else { // $dateCounter == 3
              $reminder_due = "past_due";
            }    

            // Check if pass filter
            $passFilter = test_filter($rowPatient['pid'],$rowRule['id'],$dateFocus);
            if ($passFilter === "EXCLUDED") {
              $passFilter = FALSE;
            }
            if (!$passFilter) {
              $dateCounter++;
              continue;
            }
            else {
              // If report itemization is turned on, trigger flag.
              if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
                $temp_track_pass = 0;
              }
            }

            //Check if pass target
            $passTarget = test_targets($rowPatient['pid'],$rowRule['id'],$i,$dateFocus);
            if ($passTarget) {
              // increment pass target counter
              $pass_target++;
              // If report itemization is turned on, then record the "passed" item and set the flag
              if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
                insertItemReportTracker($GLOBALS['report_itemizing_temp_flag_and_id'], $GLOBALS['report_itemized_test_id_iterator'], 1, $rowPatient['pid']);
                $temp_track_pass = 1;
              }
              // send to reminder results
              if ($mode == "reminders-all") {
                // place the completed actions into the reminder return array
                $actionArray = resolve_action_sql($rowRule['id'],$i);
                foreach ($actionArray as $action) {
                  $action_plus = $action;
                  $action_plus['due_status'] = "not_due";
                  $action_plus['pid'] = $rowPatient['pid'];
                  $action_plus['rule_id'] = $rowRule['id'];
                  $results = reminder_results_integrate($results, $action_plus);
                }
              }
              break;
            }
            else {
              // send to reminder results
              if ($mode != "report") {
                // place the actions into the reminder return array
                $actionArray = resolve_action_sql($rowRule['id'],$i);
                foreach ($actionArray as $action) {
                  $action_plus = $action;
                  $action_plus['due_status'] = $reminder_due;
                  $action_plus['pid'] = $rowPatient['pid'];
                  $action_plus['rule_id'] = $rowRule['id'];
                  $results = reminder_results_integrate($results, $action_plus);
                }
              }
            }
            $dateCounter++;
          }
          // If report itemization is turned on, then record the "failed" item if it did not pass
          if ($GLOBALS['report_itemizing_temp_flag_and_id'] && !($temp_track_pass)) {
            insertItemReportTracker($GLOBALS['report_itemizing_temp_flag_and_id'], $GLOBALS['report_itemized_test_id_iterator'], 0, $rowPatient['pid']);
          }
        }

        // Calculate and save the data for the rule
          $percentage = calculate_percentage($pass_filter,$exclude_filter,$pass_target);

        // Collect action for title (just use the first one, if more than one)
        $actionArray = resolve_action_sql($rowRule['id'],$i);
        $action = $actionArray[0];
        if ($mode == "report") {
          $newRow=array('is_sub'=>TRUE,'action_category'=>$action['category'],'action_item'=>$action['item'],'total_patients'=>'','excluded'=>'','pass_filter'=>'','pass_target'=>$pass_target,'percentage'=>$percentage);

        // If itemization is turned on, then record the itemized_test_id 
        if ($GLOBALS['report_itemizing_temp_flag_and_id']) {
          $newRow=array_merge($newRow,array('itemized_test_id'=>$GLOBALS['report_itemized_test_id_iterator']));
        }

          array_push($results, $newRow);
        }
      }
    }
  }

  // Return the data
  return $results;
}

/**
 * Process patient array that is to be tested.
 *
 * @param  integer       $provider      id of a selected provider. If blank, then will test entire clinic.
 * @param  integer       $patient_id    pid of patient. If blank then will check all patients.
 * @param  string        $pat_prov_rel  How to choose patients that are related to a chosen provider. 'primary' selects patients that the provider is set as primary provider. 'encounter' selectes patients that the provider has seen. This parameter is only applicable if the $provider parameter is set to a provider or collation setting.
 * @param  integer       $start         applicable patient to start at (when batching process)
 * @param  integer       $batchSize     number of patients to batch (when batching process)
 * @param  boolean       $onlyCount     If true, then will just return the total number of applicable records (ignores batching parameters)
 * @return array/integer                Array of patient pid values or number total pertinent patients (if $onlyCount is TRUE)
 */
function buildPatientArray($patient_id='',$provider='',$pat_prov_rel='primary',$start=NULL,$batchSize=NULL,$onlyCount=FALSE) {

  if (!empty($patient_id)) {
    // only look at the selected patient
    if ($onlyCount) {
      $patientNumber = 1;
    }
    else {
      $patientData[0]['pid'] = $patient_id;
    }
  }
  else {
    if (empty($provider)) {
      // Look at entire practice
      if ($start == NULL || $batchSize == NULL || $onlyCount) {
        $rez = sqlStatementCdrEngine("SELECT `pid` FROM `patient_data` ORDER BY `pid`");
        if ($onlyCount) {
          $patientNumber = sqlNumRows($rez);
        }
      }
      else {
        // batching
        $rez = sqlStatementCdrEngine("SELECT `pid` FROM `patient_data` ORDER BY `pid` LIMIT ?,?", array(($start-1),$batchSize));
      }
    }
    else {
      // Look at an individual physician
      if( $pat_prov_rel == 'encounter' ){
        // Choose patients that are related to specific physician by an encounter
        if ($start == NULL || $batchSize == NULL || $onlyCount) {
          $rez = sqlStatementCdrEngine("SELECT DISTINCT `pid` FROM `form_encounter` ".
                              " WHERE `provider_id`=? OR `supervisor_id`=? ORDER BY `pid`", array($provider,$provider));
          if ($onlyCount) {
            $patientNumber = sqlNumRows($rez);
          }
        }
        else {
          //batching
          $rez = sqlStatementCdrEngine("SELECT DISTINCT `pid` FROM `form_encounter` ".
                              " WHERE `provider_id`=? OR `supervisor_id`=?  ORDER BY `pid` LIMIT ?,?", array($provider,$provider,($start-1),$batchSize));
        }
      }
      else {  //$pat_prov_rel == 'primary'
        // Choose patients that are assigned to the specific physician (primary physician in patient demographics)
        if ($start == NULL || $batchSize == NULL || $onlyCount) {
          $rez = sqlStatementCdrEngine("SELECT `pid` FROM `patient_data` " .
                              "WHERE `providerID`=? ORDER BY `pid`", array($provider) );
          if ($onlyCount) {
            $patientNumber = sqlNumRows($rez);
          }
        }
        else {
          $rez = sqlStatementCdrEngine("SELECT `pid` FROM `patient_data` " .
                              "WHERE `providerID`=? ORDER BY `pid` LIMIT ?,?", array($provider,($start-1),$batchSize) );
        }
      }
    }
    // convert the sql query results into an array if returning the array
    if(!$onlyCount) {
      for($iter=0; $row=sqlFetchArray($rez); $iter++) {
       $patientData[$iter]=$row;
      }
    }
  }

  if ($onlyCount) {
    // return the number of applicable patients
    return $patientNumber;
  }
  else {
    // return array of patient pids
    return $patientData;
  }
}

/**
 * Test filter of a selected rule on a selected patient
 *
 * @param  integer        $patient_id  pid of selected patient.
 * @param  string         $rule        id(string) of selected rule
 * @param  string         $dateTarget  target date (format Y-m-d H:i:s). If blank then will test with current date as target.
 * @return boolean/string              if pass filter then TRUE; if excluded then 'EXCLUDED'; if not pass filter then FALSE
 */
function test_filter($patient_id,$rule,$dateTarget) {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Collect patient information
  $patientData = getPatientData($patient_id, "sex, DATE_FORMAT(DOB,'%Y %m %d') as DOB_TS");

  //
  // ----------------- INCLUSIONS -----------------
  //

  // -------- Age Filter (inclusion) ------------
  // Calculate patient age in years and months
  $patientAgeYears = convertDobtoAgeYearDecimal($patientData['DOB_TS'],$dateTarget);
  $patientAgeMonths = convertDobtoAgeMonthDecimal($patientData['DOB_TS'],$dateTarget);

  // Min age (year) Filter (assume that there in not more than one of each)
  $filter = resolve_filter_sql($rule,'filt_age_min');
  if (!empty($filter)) {
    $row = $filter[0];
    if ($row ['method_detail'] == "year") {
      if ( $row['value'] && ($row['value'] > $patientAgeYears) ) {
        return false;
      }
    }
    if ($row ['method_detail'] == "month") {
      if ( $row['value'] && ($row['value'] > $patientAgeMonths) ) {
        return false;
      }
    }
  }
  // Max age (year) Filter (assume that there in not more than one of each)
  $filter = resolve_filter_sql($rule,'filt_age_max');
  if (!empty($filter)) {
    $row = $filter[0];
    if ($row ['method_detail'] == "year") {
      if ( $row['value'] && ($row['value'] < $patientAgeYears) ) {
        return false;
      }
    }
    if ($row ['method_detail'] == "month") {
      if ( $row['value'] && ($row['value'] < $patientAgeMonths) ) {
        return false;
      }
    }
  }

  // -------- Gender Filter (inclusion) ---------
  // Gender Filter (assume that there in not more than one of each)
  $filter = resolve_filter_sql($rule,'filt_sex');
  if (!empty($filter)) {
    $row = $filter[0];
    if ( $row['value'] && ($row['value'] != $patientData['sex']) ) {
      return false;
    }
  }

  // -------- Database Filter (inclusion) ------
  // Database Filter
  $filter = resolve_filter_sql($rule,'filt_database');
  if ((!empty($filter)) && !database_check($patient_id,$filter,'',$dateTarget)) return false;

  // -------- Lists Filter (inclusion) ----
  // Set up lists filter, which is fully customizable and currently includes diagnoses, meds,
  //   surgeries and allergies.
  $filter = resolve_filter_sql($rule,'filt_lists');
  if ((!empty($filter)) && !lists_check($patient_id,$filter,$dateTarget)) return false;

  // -------- Procedure (labs,imaging,test,procedures,etc) Filter (inlcusion) ----
  // Procedure Target (includes) (may need to include an interval in the future)
  $filter = resolve_filter_sql($rule,'filt_proc');
  if ((!empty($filter)) && !procedure_check($patient_id,$filter,'',$dateTarget)) return false;

  //
  // ----------------- EXCLUSIONS -----------------
  //

  // -------- Lists Filter (EXCLUSION) ----
  // Set up lists EXCLUSION filter, which is fully customizable and currently includes diagnoses, meds,
  //   surgeries and allergies.
  $filter = resolve_filter_sql($rule,'filt_lists',0);
  if ((!empty($filter)) && lists_check($patient_id,$filter,$dateTarget)) return "EXCLUDED";

  // Passed all filters, so return true.
  return true;
}

/**
 * Return an array containing existing group ids for a rule
 *
 * @param  string  $rule  id(string) of rule
 * @return array          listing of group ids
 */
function returnTargetGroups($rule) {

  $sql = sqlStatementCdrEngine("SELECT DISTINCT `group_id` FROM `rule_target` " .
    "WHERE `id`=?", array($rule) );

  $groups = array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($groups,$row['group_id']);
  }
  return $groups;
}

/**
 * Test targets of a selected rule on a selected patient
 *
 * @param  integer  $patient_id  pid of selected patient.
 * @param  string   $rule        id(string) of selected rule (if blank, then will ignore grouping)
 * @param  integer  $group_id    group id of target group
 * @param  string   $dateTarget  target date (format Y-m-d H:i:s).
 * @return boolean               if target passes then true, otherwise false
 */
function test_targets($patient_id,$rule,$group_id='',$dateTarget) {

  // -------- Interval Target ----
  $interval = resolve_target_sql($rule,$group_id,'target_interval');

  // -------- Database Target ----
  // Database Target (includes)
  $target = resolve_target_sql($rule,$group_id,'target_database');
  if ((!empty($target)) && !database_check($patient_id,$target,$interval,$dateTarget)) return false;

  // -------- Procedure (labs,imaging,test,procedures,etc) Target ----
  // Procedure Target (includes)
  $target = resolve_target_sql($rule,$group_id,'target_proc');
  if ((!empty($target)) && !procedure_check($patient_id,$target,$interval,$dateTarget)) return false;

  // -------- Appointment Target ----
  // Appointment Target (includes) (Specialized functionality for appointment reminders)
  $target = resolve_target_sql($rule,$group_id,'target_appt');
  if ((!empty($target)) && appointment_check($patient_id,$dateTarget)) return false;

  // Passed all target tests, so return true.
  return true;
}

/**
 * Function to return active plans
 *
 * @param  string   $type             plan type filter (normal or cqm or blank)
 * @param  integer  $patient_id       pid of selected patient. (if custom plan does not exist then will use the default plan)
 * @param  boolean  $configurableOnly true if only want the configurable (per patient) plans (ie. ignore cqm plans)
 * @return array                      active plans
 */
function resolve_plans_sql($type='',$patient_id='0',$configurableOnly=FALSE) {

  if ($configurableOnly) {
    // Collect all default, configurable (per patient) plans into an array
    //   (ie. ignore the cqm rules)
    $sql = sqlStatementCdrEngine("SELECT * FROM `clinical_plans` WHERE `pid`=0 AND `cqm_flag` !=1 ORDER BY `id`");
  }
  else {
    // Collect all default plans into an array
    $sql = sqlStatementCdrEngine("SELECT * FROM `clinical_plans` WHERE `pid`=0 ORDER BY `id`");
  }
  $returnArray= array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($returnArray,$row);
  }

  // Now collect the pertinent plans
  $newReturnArray = array();

  // Need to select rules (use custom if exist)
  foreach ($returnArray as $plan) {
    $customPlan = sqlQueryCdrEngine("SELECT * FROM `clinical_plans` WHERE `id`=? AND `pid`=?", array($plan['id'],$patient_id) );

    // Decide if use default vs custom plan (preference given to custom plan)
    if (!empty($customPlan)) {
      if ($type == "cqm" ) {
        // For CQM , do not use custom plans (these are to create standard clinic wide reports)
        $goPlan = $plan;
      }
      else {
        // merge the custom plan with the default plan
        $mergedPlan = array();
        foreach ($customPlan as $key => $value) {
          if ($value == NULL && preg_match("/_flag$/",$key)) {
            // use default setting
            $mergedPlan[$key] = $plan[$key];
          }
          else {
            // use custom setting
            $mergedPlan[$key] = $value;
          }
        }
        $goPlan = $mergedPlan;
      }
    }
    else {
      $goPlan = $plan;
    }

    // Use the chosen plan if set
    if (!empty($type)) {
      if ($goPlan["${type}_flag"] == 1) {
        // active, so use the plan
        array_push($newReturnArray,$goPlan);
      }
    }
    else {
      if ($goPlan['normal_flag'] == 1 ||
          $goPlan['cqm_flag'] == 1) {
        // active, so use the plan
        array_push($newReturnArray,$goPlan);
      }
    }
  }
  $returnArray = $newReturnArray;

  return $returnArray;
}


/**
 * Function to return a specific plan
 *
 * @param  string   $plan        id(string) of plan
 * @param  integer  $patient_id  pid of selected patient. (if set to 0, then will return the default rule).
 * @return array                 a plan
 */
function collect_plan($plan,$patient_id='0') {

  return sqlQueryCdrEngine("SELECT * FROM `clinical_plans` WHERE `id`=? AND `pid`=?", array($plan,$patient_id) );

}

/**
 * Function to set a specific plan activity for a specific patient
 *
 * @param  string   $plan        id(string) of plan
 * @param  string   $type        plan filter (normal,cqm)
 * @param  string   $setting     activity of plan (yes,no,default)
 * @param  integer  $patient_id  pid of selected patient.
 */
function set_plan_activity_patient($plan,$type,$setting,$patient_id) {

  // Don't allow messing with the default plans here
  if ($patient_id == "0") {
    return;
  }

  // Convert setting
  if ($setting == "on") {
    $setting = 1;
  }
  else if ($setting == "off") {
    $setting = 0;
  }
  else { // $setting == "default"
    $setting = NULL;
  }

  // Collect patient specific plan, if already exists.
  $query = "SELECT * FROM `clinical_plans` WHERE `id` = ? AND `pid` = ?";
  $patient_plan = sqlQueryCdrEngine($query, array($plan,$patient_id) );

  if (empty($patient_plan)) {
    // Create a new patient specific plan with flags all set to default
    $query = "INSERT into `clinical_plans` (`id`, `pid`) VALUES (?,?)";
    sqlStatementCdrEngine($query, array($plan, $patient_id) );
  }

  // Update patient specific row
  $query = "UPDATE `clinical_plans` SET `" . escape_sql_column_name($type."_flag",array("clinical_plans")) . "`= ? WHERE id = ? AND pid = ?";
  sqlStatementCdrEngine($query, array($setting,$plan,$patient_id) );

}

/**
 * Function to return active rules
 *
 * @param  string   $type             rule filter (active_alert,passive_alert,cqm,cqm_2011,cqm_2014,amc_2011,amc_2014,patient_reminder)
 * @param  integer  $patient_id       pid of selected patient. (if custom rule does not exist then will use the default rule)
 * @param  boolean  $configurableOnly true if only want the configurable (per patient) rules (ie. ignore cqm and amc rules)
 * @param  string   $plan             collect rules for specific plan
 * @param  string   $user             If a user is set, then will only show rules that user has permission to see
 * @return array                      rules
 */
function resolve_rules_sql($type='',$patient_id='0',$configurableOnly=FALSE,$plan='',$user='') {

  if ($configurableOnly) {
    // Collect all default, configurable (per patient) rules into an array
    //   (ie. ignore the cqm and amc rules)
    $sql = sqlStatementCdrEngine("SELECT * FROM `clinical_rules` WHERE `pid`=0 AND `cqm_flag` !=1 AND `amc_flag` !=1 ORDER BY `id`");
  }
  else {
    // Collect all default rules into an array
    $sql = sqlStatementCdrEngine("SELECT * FROM `clinical_rules` WHERE `pid`=0 ORDER BY `id`");
  }
  $returnArray= array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($returnArray,$row);
  }

  // Now filter rules for plan (if applicable)
  if (!empty($plan)) {
    $planReturnArray = array();
    foreach ($returnArray as $rule) {
      $standardRule = sqlQueryCdrEngine("SELECT * FROM `clinical_plans_rules` " .
                               "WHERE `plan_id`=? AND `rule_id`=?", array($plan,$rule['id']) );
      if (!empty($standardRule)) {
        array_push($planReturnArray,$rule);
      }
    }
    $returnArray = $planReturnArray;
  }

  // Now collect the pertinent rules
  $newReturnArray = array();

  // Need to select rules (use custom if exist)
  foreach ($returnArray as $rule) {

    // If user is set, then check if user has access to the rule
    if (!empty($user)) {
      $access_control = explode(':',$rule['access_control']);
      if ( !empty($access_control[0]) && !empty($access_control[1]) ) {
        // Section and ACO filters are not empty, so do the test for access.
        if (!acl_check($access_control[0],$access_control[1],$user)) {
          // User does not have access to this rule, so skip the rule.
          continue;
        }
      }
      else {
        // Section or ACO filters are empty, so use default patients:med aco
        if (!acl_check('patients','med',$user)) {
          // User does not have access to this rule, so skip the rule.
          continue;
        }
      }
    }

    $customRule = sqlQueryCdrEngine("SELECT * FROM `clinical_rules` WHERE `id`=? AND `pid`=?", array($rule['id'],$patient_id) );

    // Decide if use default vs custom rule (preference given to custom rule)
    if (!empty($customRule)) {
      if ($type == "cqm" || $type == "amc" ) {
        // For CQM and AMC, do not use custom rules (these are to create standard clinic wide reports)
        $goRule = $rule;
      }
      else {
        // merge the custom rule with the default rule
        $mergedRule = array();
        foreach ($customRule as $key => $value) {
          if ($value == NULL && preg_match("/_flag$/",$key)) {
            // use default setting
            $mergedRule[$key] = $rule[$key];
          }
          else {
            // use custom setting
            $mergedRule[$key] = $value;
          }
        }
        $goRule = $mergedRule;
      }
    }
    else {
      $goRule = $rule;
    }

    // Use the chosen rule if set
    if (!empty($type)) {
      if ($goRule["${type}_flag"] == 1) {
        // active, so use the rule
        array_push($newReturnArray,$goRule);
      }
    }
    else {
      // no filter, so return the rule
      array_push($newReturnArray,$goRule);
    }
  }
  $returnArray = $newReturnArray;

  return $returnArray;
}

/**
 * Function to return a specific rule
 *
 * @param  string   $rule        id(string) of rule
 * @param  integer  $patient_id  pid of selected patient. (if set to 0, then will return the default rule).    
 * @return array                 rule
 */
function collect_rule($rule,$patient_id='0') {

  return sqlQueryCdrEngine("SELECT * FROM `clinical_rules` WHERE `id`=? AND `pid`=?", array($rule,$patient_id) );
  
}

/**
 * Function to set a specific rule activity for a specific patient
 *
 * @param  string   $rule        id(string) of rule
 * @param  string   $type        rule filter (active_alert,passive_alert,cqm,amc,patient_reminder)
 * @param  string   $setting     activity of rule (yes,no,default)
 * @param  integer  $patient_id  pid of selected patient.
 */
function set_rule_activity_patient($rule,$type,$setting,$patient_id) {

  // Don't allow messing with the default rules here
  if ($patient_id == "0") {
    return;
  }

  // Convert setting
  if ($setting == "on") {
    $setting = 1;
  }
  else if ($setting == "off") {
    $setting = 0;
  }
  else { // $setting == "default"
    $setting = NULL;
  }

  //Collect main rule to allow setting of the access_control
  $original_query = "SELECT * FROM `clinical_rules` WHERE `id` = ? AND `pid` = 0";
  $patient_rule_original = sqlQueryCdrEngine($original_query, array($rule) );

  // Collect patient specific rule, if already exists.
  $query = "SELECT * FROM `clinical_rules` WHERE `id` = ? AND `pid` = ?";
  $patient_rule = sqlQueryCdrEngine($query, array($rule,$patient_id) );

  if (empty($patient_rule)) {
    // Create a new patient specific rule with flags all set to default
    $query = "INSERT into `clinical_rules` (`id`, `pid`, `access_control`) VALUES (?,?,?)";
    sqlStatementCdrEngine($query, array($rule, $patient_id, $patient_rule_original['access_control']) ); 
  }

  // Update patient specific row
  $query = "UPDATE `clinical_rules` SET `" . add_escape_custom($type) . "_flag`= ?, `access_control` = ? WHERE id = ? AND pid = ?";
  sqlStatementCdrEngine($query, array($setting,$patient_rule_original['access_control'],$rule,$patient_id) );

}

/**
 * Function to return applicable reminder dates (relative)
 *
 * @param  string  $rule             id(string) of selected rule
 * @param  string  $reminder_method  string label of filter type
 * @return array                      reminder features
 */
function resolve_reminder_sql($rule,$reminder_method) {
  $sql = sqlStatementCdrEngine("SELECT `method_detail`, `value` FROM `rule_reminder` " .
    "WHERE `id`=? AND `method`=?", array($rule, $reminder_method) );

  $returnArray= array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($returnArray,$row);
  }
  return $returnArray;
}

/**
 * Function to return applicable filters
 *
 * @param  string  $rule           id(string) of selected rule
 * @param  string  $filter_method  string label of filter type
 * @param  string  $include_flag   to allow selection for included or excluded filters
 * @return array                    filters
 */
function resolve_filter_sql($rule,$filter_method,$include_flag=1) {
  $sql = sqlStatementCdrEngine("SELECT `method_detail`, `value`, `required_flag` FROM `rule_filter` " .
    "WHERE `id`=? AND `method`=? AND `include_flag`=?", array($rule, $filter_method, $include_flag) );

  $returnArray= array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($returnArray,$row);
  }
  return $returnArray;
}

/**
 * Function to return applicable targets
 *
 * @param  string   $rule           id(string) of selected rule
 * @param  integer  $group_id       group id of target group (if blank, then will ignore grouping)
 * @param  string   $target_method  string label of target type
 * @param  string   $include_flag   to allow selection for included or excluded targets
 * @return array                    targets
 */
function resolve_target_sql($rule,$group_id='',$target_method,$include_flag=1) {

  if ($group_id) {
    $sql = sqlStatementCdrEngine("SELECT `value`, `required_flag`, `interval` FROM `rule_target` " .
      "WHERE `id`=? AND `group_id`=? AND `method`=? AND `include_flag`=?", array($rule, $group_id, $target_method, $include_flag) );
  }
  else {
    $sql = sqlStatementCdrEngine("SELECT `value`, `required_flag`, `interval` FROM `rule_target` " .
      "WHERE `id`=? AND `method`=? AND `include_flag`=?", array($rule, $target_method, $include_flag) );
  }

  $returnArray= array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($returnArray,$row);
  }
  return $returnArray;
}

/**
 * Function to return applicable actions
 *
 * @param  string   $rule      id(string) of selected rule
 * @param  integer  $group_id  group id of target group (if blank, then will ignore grouping)
 * @return array               actions
 */
function resolve_action_sql($rule,$group_id='') {

  if ($group_id) {
    $sql = sqlStatementCdrEngine("SELECT b.category, b.item, b.clin_rem_link, b.reminder_message, b.custom_flag " .
      "FROM `rule_action` as a " .
      "JOIN `rule_action_item` as b " .
      "ON a.category = b.category AND a.item = b.item " .
      "WHERE a.id=? AND a.group_id=?", array($rule,$group_id) );
  }
  else {
    $sql = sqlStatementCdrEngine("SELECT b.category, b.item, b.value, b.custom_flag " .
      "FROM `rule_action` as a " .
      "JOIN `rule_action_item` as b " .
      "ON a.category = b.category AND a.item = b.item " .
      "WHERE a.id=?", array($rule) );
  }

  $returnArray= array();
  for($iter=0; $row=sqlFetchArray($sql); $iter++) {
    array_push($returnArray,$row);
  }
  return $returnArray;
}

/**
 * Function to check database filters and targets
 *
 * @param  string  $patient_id  pid of selected patient.
 * @param  array   $filter      array containing filter/target elements
 * @param  array   $interval    array containing interval elements
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s). blank is current date.
 * @return boolean              true if check passed, otherwise false
 */
function database_check($patient_id,$filter,$interval='',$dateTarget='') {
  $isMatch = false; //matching flag

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Unpackage interval information
  // (Assume only one for now and only pertinent for targets)
  $intervalType = '';
  $intervalValue = '';
  if (!empty($interval)) {
    $intervalType = $interval[0]['value'];
    $intervalValue = $interval[0]['interval'];
  }
  $cond_loop = 0;
  foreach( $filter as $row ) {
        
    // Row description
    //   [0]=>special modes
    $temp_df = explode("::",$row['value']);

    if ($temp_df[0] == "CUSTOM") {
      // Row description
      //   [0]=>special modes(CUSTOM) [1]=>category [2]=>item [3]=>complete? [4]=>number of hits comparison [5]=>number of hits
      if (exist_custom_item($patient_id, $temp_df[1], $temp_df[2], $temp_df[3], $temp_df[4], $temp_df[5], $intervalType, $intervalValue, $dateTarget)) {
        // Record the match
        $isMatch = true;
      }
      else {
       // If this is a required entry then return false
       if ($row['required_flag']) return false;
      }
    }
    else if ($temp_df[0] == "LIFESTYLE") {
      // Row description
      //   [0]=>special modes(LIFESTYLE) [1]=>column [2]=>status
      if (exist_lifestyle_item($patient_id, $temp_df[1], $temp_df[2], $dateTarget)) {
        // Record the match
        $isMatch = true;
      }
      else {
       // If this is a required entry then return false
       if ($row['required_flag']) return false;
      }  
    }
    else {
      // Default mode
      // Row description
      //   [0]=>special modes(BLANK) [1]=>table [2]=>column [3]=>value comparison [4]=>value [5]=>number of hits comparison [6]=>number of hits
      if (exist_database_item($patient_id, $temp_df[1], $temp_df[2], $temp_df[3], $temp_df[4], $temp_df[5], $temp_df[6], $intervalType, $intervalValue, $dateTarget)) {
        // Record the match
        if($cond_loop > 0) // For multiple condition check
                $isMatch = $isMatch && true;
        else
                $isMatch = true;
      }
      else {
       // If this is a required entry then return false
       if ($row['required_flag']) return false;
      }
    }
    $cond_loop++;
  }

  // return results of check
  return $isMatch;
}

/**
 * Function to check procedure filters and targets
 *
 * @param  string  $patient_id  pid of selected patient.
 * @param  array   $filter      array containing filter/target elements
 * @param  array   $interval    array containing interval elements
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s). blank is current date.
 * @return boolean              true if check passed, otherwise false
 */
function procedure_check($patient_id,$filter,$interval='',$dateTarget='') {
  $isMatch = false; //matching flag

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Unpackage interval information
  // (Assume only one for now and only pertinent for targets)
  $intervalType = '';
  $intervalValue = '';
  if (!empty($interval)) {
    $intervalType = $interval[0]['value'];
    $intervalValue = $interval[0]['interval'];
  }

  foreach( $filter as $row ) {
    // Row description
    // [0]=>title [1]=>code [2]=>value comparison [3]=>value [4]=>number of hits comparison [5]=>number of hits
    //   code description
    //     <type(ICD9,CPT4)>:<identifier>||<type(ICD9,CPT4)>:<identifier>||<identifier> etc.
    $temp_df = explode("::",$row['value']);
    if (exist_procedure_item($patient_id, $temp_df[0], $temp_df[1], $temp_df[2], $temp_df[3], $temp_df[4], $temp_df[5], $intervalType, $intervalValue, $dateTarget)) {
      // Record the match
      $isMatch = true;
    }
    else {
      // If this is a required entry then return false
      if ($row['required_flag']) return false;
    }
  }

  // return results of check
  return $isMatch;
}

/**
 * Function to check for appointment
 *
 * @todo Complete this to allow appointment reminders.
 * @param  string  $patient_id  pid of selected patient.
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s). blank is current date.
 * @return boolean              true if appt exist, otherwise false
 */
function appointment_check($patient_id,$dateTarget='') {
  $isMatch = false; //matching flag

  // Set date to current if not set (although should always be set)
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');
  $dateTargetRound = date('Y-m-d',$dateTarget);

  // Set current date
  $currentDate = date('Y-m-d H:i:s');
  $currentDateRound = date('Y-m-d',$dateCurrent);

  // Basically, if the appointment is within the current date to the target date,
  //  then return true. (will not send reminders on same day as appointment)
  $sql = sqlStatementCdrEngine("SELECT openemr_postcalendar_events.pc_eid, " .
    "openemr_postcalendar_events.pc_title, " .
    "openemr_postcalendar_events.pc_eventDate, " .
    "openemr_postcalendar_events.pc_startTime, " .
    "openemr_postcalendar_events.pc_endTime " .
    "FROM openemr_postcalendar_events " .
    "WHERE openemr_postcalendar_events.pc_eventDate > ? " .
    "AND openemr_postcalendar_events.pc_eventDate <= ? " .
    "AND openemr_postcalendar_events.pc_pid = ?", array($currentDate,$dateTarget,$patient_id) );

  // return results of check
  //
  // TODO: Figure out how to have multiple appointment and changing appointment reminders.
  //       Plan to send back array of appt info (eid, time, date, etc.)
  //       to do this.
  if (sqlNumRows($sql) > 0) {
    $isMatch = true;
  }

  return $isMatch;
}

/**
 * Function to check lists filters and targets. Customizable and currently includes diagnoses, medications, allergies and surgeries.
 *
 * @param  string  $patient_id  pid of selected patient.
 * @param  array   $filter      array containing lists filter/target elements
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s). blank is current date.
 * @return boolean              true if check passed, otherwise false
 */
function lists_check($patient_id,$filter,$dateTarget) {
  $isMatch = false; //matching flag

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  foreach ( $filter as $row ) {
    if (exist_lists_item($patient_id, $row['method_detail'], $row['value'], $dateTarget)) {
      // Record the match
      $isMatch = true;
    }
    else {
     // If this is a required entry then return false
     if ($row['required_flag']) return false;
    }
  }

  // return results of check
  return $isMatch;
}

/**
 * Function to check for existance of data in database for a patient
 *
 * @param  string   $patient_id       pid of selected patient.
 * @param  string   $table            selected mysql table
 * @param  string   $column           selected mysql column
 * @param  string   $data_comp        data comparison (eq,ne,gt,ge,lt,le)
 * @param  string   $data             selected data in the mysql database
 * @param  string   $num_items_comp   number items comparison (eq,ne,gt,ge,lt,le)
 * @param  integer  $num_items_thres  number of items threshold
 * @param  string   $intervalType     type of interval (ie. year)
 * @param  integer  $intervalValue    searched for within this many times of the interval type
 * @param  string   $dateTarget       target date(format Y-m-d H:i:s).
 * @return boolean                    true if check passed, otherwise false
 */
function exist_database_item($patient_id,$table,$column='',$data_comp,$data='',$num_items_comp,$num_items_thres,$intervalType='',$intervalValue='',$dateTarget='') {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Collect the correct column label for patient id in the table
  $patient_id_label = collect_database_label('pid',$table);

  // Get the interval sql query string
  $dateSql = sql_interval_string($table,$intervalType,$intervalValue,$dateTarget);

  // If just checking for existence (ie. data is empty),
  //   then simply set the comparison operator to ne.
  if (empty($data)) {
    $data_comp = "ne";
  }

  // get the appropriate sql comparison operator
  $compSql = convertCompSql($data_comp);

  // custom issues per table can be placed here
  $customSQL = '';
  if ($table == 'immunizations') {
    $customSQL = " AND `added_erroneously` = '0' ";
  }
  
  //adding table list for where condition 
  $whereTables = '';
  if($table == 'procedure_result'){
        $whereTables = ", procedure_order_code, " .
               "procedure_order, " .
               "procedure_report " ;
        $customSQL = " AND procedure_order.procedure_order_id = procedure_order_code.procedure_order_id AND " .
               "procedure_report.procedure_order_id = procedure_order.procedure_order_id AND " .
               "procedure_report.procedure_order_seq = procedure_order_code.procedure_order_seq AND " .
               "procedure_result.procedure_report_id = procedure_report.procedure_report_id ";
  }

  // check for items
  if (empty($column)) {
    // simple search for any table entries
    $sql = sqlStatementCdrEngine("SELECT * " .
      "FROM `" . add_escape_custom($table)  . "` " .
      " ". $whereTables. " ".
      "WHERE " . add_escape_custom($patient_id_label)  . "=? " . $customSQL, array($patient_id) );
  }
  else {
    // search for number of specific items
    $sql = sqlStatementCdrEngine("SELECT `" . add_escape_custom($column) . "` " .
      "FROM `" . add_escape_custom($table)  . "` " .
      " ". $whereTables. " ".
      "WHERE `" . add_escape_custom($column) ."`" . $compSql . "? " .
      "AND " . add_escape_custom($patient_id_label)  . "=? " . $customSQL .
      $dateSql, array($data,$patient_id) );
  }

  // See if number of returned items passes the comparison
  return itemsNumberCompare($num_items_comp, $num_items_thres, sqlNumRows($sql));
}

/**
 * Function to check for existence of procedure(s) for a patient
 *
 * @param  string   $patient_id       pid of selected patient.
 * @param  string   $proc_title       procedure title
 * @param  string   $proc_code        procedure identifier code (array of <type(ICD9,CPT4)>:<identifier>||<type(ICD9,CPT4)>:<identifier>||<identifier> etc.)
 * @param  string   $results_comp     results comparison (eq,ne,gt,ge,lt,le)
 * @param  string   $result_data      results data 
 * @param  string   $num_items_comp   number items comparison (eq,ne,gt,ge,lt,le)
 * @param  integer  $num_items_thres  number of items threshold
 * @param  string   $intervalType     type of interval (ie. year)
 * @param  integer  $intervalValue    searched for within this many times of the interval type
 * @param  string   $dateTarget       target date(format Y-m-d H:i:s).
 * @return boolean                    true if check passed, otherwise false
 */
function exist_procedure_item($patient_id,$proc_title,$proc_code,$result_comp,$result_data='',$num_items_comp,$num_items_thres,$intervalType='',$intervalValue='',$dateTarget='') {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Set the table exception (for looking up pertinent date and pid sql columns)
  $table = "PROCEDURE-EXCEPTION";

  // Collect the correct column label for patient id in the table
  $patient_id_label = collect_database_label('pid',$table);

  // Get the interval sql query string
  $dateSql = sql_interval_string($table,$intervalType,$intervalValue,$dateTarget);

  // If just checking for existence (ie result_data is empty),
  //   then simply set the comparison operator to ne.
  if (empty($result_data)) {
    $result_comp = "ne";
  }
  
  // get the appropriate sql comparison operator
  $compSql = convertCompSql($result_comp);

  // explode the code array
  $codes= array();
  if (!empty($proc_code)) {
    $codes = explode("||",$proc_code);
  }
  else {
    $codes[0] = '';
  }

  // ensure proc_title is at least blank
  if (empty($proc_title)) {
    $proc_title = '';
  }

  // collect specific items (use both title and/or codes) that fulfill request
  $sqlBindArray=array();
  $sql_query = "SELECT procedure_result.result FROM " .
               "procedure_order_code, " .
               "procedure_order, " .
               "procedure_type, " .
               "procedure_report, " .
               "procedure_result " .
               "WHERE " .
               "procedure_order_code.procedure_code = procedure_type.procedure_code AND " .
               "procedure_order.procedure_order_id = procedure_order_code.procedure_order_id AND " .
               "procedure_order.lab_id = procedure_type.lab_id AND " .
               "procedure_report.procedure_order_id = procedure_order.procedure_order_id AND " .
               "procedure_report.procedure_order_seq = procedure_order_code.procedure_order_seq AND " .
               "procedure_result.procedure_report_id = procedure_report.procedure_report_id AND " .
               "procedure_type.procedure_type = 'ord' AND ";
  foreach ($codes as $tem) {
    $sql_query .= "( ( (procedure_type.standard_code = ? AND procedure_type.standard_code != '') " .
                  "OR (procedure_type.procedure_code = ? AND procedure_type.procedure_code != '') ) OR ";
    array_push($sqlBindArray,$tem,$tem);
  }
  $sql_query .= "(procedure_type.name = ? AND procedure_type.name != '') ) " .
                "AND procedure_result.result " . $compSql . " ? " .
                "AND " . add_escape_custom($patient_id_label) . " = ? " . $dateSql;
  array_push($sqlBindArray,$proc_title,$result_data,$patient_id);

  $sql = sqlStatementCdrEngine($sql_query,$sqlBindArray);
 
  // See if number of returned items passes the comparison
  return itemsNumberCompare($num_items_comp, $num_items_thres, sqlNumRows($sql));
}

/**
 * Function to check for existance of data for a patient in the rule_patient_data table
 *
 * @param  string   $patient_id       pid of selected patient.
 * @param  string   $category         label in category column
 * @param  string   $item             label in item column
 * @param  string   $complete         label in complete column (YES,NO, or blank)
 * @param  string   $num_items_comp   number items comparison (eq,ne,gt,ge,lt,le)
 * @param  integer  $num_items_thres  number of items threshold
 * @param  string   $intervalType     type of interval (ie. year)
 * @param  integer  $intervalValue    searched for within this many times of the interval type
 * @param  string   $dateTarget       target date(format Y-m-d H:i:s).
 * @return boolean                    true if check passed, otherwise false
 */
function exist_custom_item($patient_id,$category,$item,$complete,$num_items_comp,$num_items_thres,$intervalType='',$intervalValue='',$dateTarget) {

  // Set the table
  $table = 'rule_patient_data';

  // Collect the correct column label for patient id in the table
  $patient_id_label = collect_database_label('pid',$table);

  // Get the interval sql query string
  $dateSql = sql_interval_string($table,$intervalType,$intervalValue,$dateTarget);

  // search for number of specific items
  $sql = sqlStatementCdrEngine("SELECT `result` " .
    "FROM `" . add_escape_custom($table)  . "` " .
    "WHERE `category`=? " .
    "AND `item`=? " .
    "AND `complete`=? " .
    "AND `" . add_escape_custom($patient_id_label)  . "`=? " .
    $dateSql, array($category,$item,$complete,$patient_id) );

  // See if number of returned items passes the comparison
  return itemsNumberCompare($num_items_comp, $num_items_thres, sqlNumRows($sql));
}

/**
 * Function to check for existance of data for a patient in lifestyle section
 *
 * @param  string  $patient_id  pid of selected patient.
 * @param  string  $lifestyle   selected label of mysql column of patient history
 * @param  string  $status      specific status of selected lifestyle element
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s). blank is current date.
 * @return boolean              true if check passed, otherwise false
 */
function exist_lifestyle_item($patient_id,$lifestyle,$status,$dateTarget) {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Collect pertinent history data
  $history = getHistoryData($patient_id, $lifestyle,'',$dateTarget);
 
  // See if match
  $stringFlag = strstr($history[$lifestyle], "|".$status);
  if (empty($status)) {
    // Only ensuring any data has been entered into the field
    $stringFlag = true;
  }
  if ( $history[$lifestyle] &&
       $history[$lifestyle] != '|0|' &&
       $stringFlag ) {
    return true;
  }
  else {
    return false;
  }
}

/**
 * Function to check for lists item of a patient. Fully customizable and includes diagnoses, medications,
 * allergies, and surgeries.
 *
 * @param  string  $patient_id  pid of selected patient.
 * @param  string  $type        type (medical_problem, allergy, medication, etc)
 * @param  string  $value       value searching for
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s).
 * @return boolean              true if check passed, otherwise false
 */
function exist_lists_item($patient_id,$type,$value,$dateTarget) {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Attempt to explode the value into a code type and code (if applicable)
  $value_array = explode("::",$value);
  if (count($value_array) == 2) {

    // Collect the code type and code
    $code_type = $value_array[0];
    $code = $value_array[1];

    if ($code_type=='CUSTOM') {
      // Deal with custom code type first (title column in lists table)
      $response = sqlQueryCdrEngine("SELECT * FROM `lists` " .
        "WHERE `type`=? " .
        "AND `pid`=? " .
        "AND `title`=? " .
        "AND ( (`begdate` IS NULL AND `date`<=?) OR (`begdate` IS NOT NULL AND `begdate`<=?) ) " .
        "AND ( (`enddate` IS NULL) OR (`enddate` IS NOT NULL AND `enddate`>=?) )", array($type,$patient_id,$code,$dateTarget,$dateTarget,$dateTarget) );
      if (!empty($response)) return true;
    }
    else {
      // Deal with the set code types (diagnosis column in lists table)
      $response = sqlQueryCdrEngine("SELECT * FROM `lists` " .
        "WHERE `type`=? " .
        "AND `pid`=? " .
        "AND `diagnosis` LIKE ? " .
        "AND ( (`begdate` IS NULL AND `date`<=?) OR (`begdate` IS NOT NULL AND `begdate`<=?) ) " .
        "AND ( (`enddate` IS NULL) OR (`enddate` IS NOT NULL AND `enddate`>=?) )", array($type,$patient_id,"%".$code_type.":".$code."%",$dateTarget,$dateTarget,$dateTarget) );
      if (!empty($response)) return true;
    }
  }
  else { // count($value_array) == 1
    // Search the title column in lists table
    //   Yes, this is essentially the same as the code type listed as CUSTOM above. This provides flexibility and will ensure compatibility.
    $response = sqlQueryCdrEngine("SELECT * FROM `lists` " .
      "WHERE `type`=? " .
      "AND `pid`=? " .
      "AND `title`=? ".
      "AND ( (`begdate` IS NULL AND `date`<=?) OR (`begdate` IS NOT NULL AND `begdate`<=?) ) " .
      "AND ( (`enddate` IS NULL) OR (`enddate` IS NOT NULL AND `enddate`>=?) )", array($type,$patient_id,$value,$dateTarget,$dateTarget,$dateTarget) );
    if (!empty($response)) return true;

    if($type == 'medication'){ // Special case needed for medication as it need to be looked into current medications (prescriptions table) from ccda import
        $response = sqlQueryCdrEngine("SELECT * FROM `prescriptions` where `patient_id` = ? and `drug` = ? and `date_added` <= ?", array($patient_id,$value,$dateTarget));
        if(!empty($response)) return true;
    }
  }

  return false;
}

/**
 * Function to return part of sql query to deal with interval
 *
 * @param  string  $table          selected mysql table (or EXCEPTION(s))
 * @param  string  $intervalType   type of interval (ie. year)
 * @param  string  $intervalValue  searched for within this many times of the interval type
 * @param  string  $dateTarget     target date(format Y-m-d H:i:s).
 * @return string                  contains pertinent date interval filter for mysql query
 */
function sql_interval_string($table,$intervalType,$intervalValue,$dateTarget) {

  $dateSql="";

  // Collect the correct column label for date in the table
  $date_label = collect_database_label('date',$table);

  // Deal with interval
  if (!empty($intervalType)) {
    switch($intervalType) {
      case "year":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " YEAR) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "month":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " MONTH) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "week":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " WEEK) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "day":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " DAY) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "hour":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " HOUR) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "minute":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " MINUTE) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "second":
        $dateSql = "AND (" . add_escape_custom($date_label) .
          " BETWEEN DATE_SUB('" . add_escape_custom($dateTarget) .
          "', INTERVAL " . add_escape_custom($intervalValue) .
          " SECOND) AND '" . add_escape_custom($dateTarget) . "') ";
        break;
      case "flu_season":
        // Flu season to be hard-coded as September thru February
        //  (Should make this modifiable in the future)
        //  ($intervalValue is not used)
        $dateArray = explode("-",$dateTarget);
        $Year = $dateArray[0];
        $dateThisYear = $Year . "-09-01";
        $dateLastYear = ($Year-1) . "-09-01";
        $dateSql =" " .
          "AND ((" .
              "MONTH('" . add_escape_custom($dateTarget) . "') < 9 " .
              "AND " . add_escape_custom($date_label) . " >= '" . $dateLastYear . "' ) " .
            "OR (" .
              "MONTH('" . add_escape_custom($dateTarget) . "') >= 9 " .
              "AND " . add_escape_custom($date_label) . " >= '" . $dateThisYear . "' ))" .
          "AND " . add_escape_custom($date_label) . " <= '" . add_escape_custom($dateTarget) . "' ";
        break;
    }
  }
  else {
    $dateSql = "AND " . add_escape_custom($date_label) .
      " <= '" . add_escape_custom($dateTarget)  . "' ";
  }

 // return the sql interval string
 return $dateSql;
}

/**
 * Function to collect generic column labels from tables. It currently works for date
 * and pid. Will need to expand this as algorithm grows.
 *
 * @param  string  $label  element (pid or date)
 * @param  string  $table  selected mysql table (or EXCEPTION(s))
 * @return string          contains official label of selected element
 */
function collect_database_label($label,$table) {
 
  if ($table == 'PROCEDURE-EXCEPTION') {
    // return cell to get procedure collection
    // special case since reuqires joing of multiple
    // tables to get this value
    if ($label == "pid") {
      $returnedLabel = "procedure_order.patient_id";
    }
    else if ($label == "date") {
      $returnedLabel = "procedure_report.date_collected";
    }
    else {
      // unknown label, so return the original label
      $returnedLabel = $label;
    }
  }
  else if ($table == 'immunizations') {
    // return requested label for immunization table
    if ($label == "pid") {
      $returnedLabel = "patient_id";
    }
    else if ($label == "date") {
      $returnedLabel = "`administered_date`";
    }
    else {
      // unknown label, so return the original label
      $returnedLabel = $label;
    }
  }
  else if ($table == 'prescriptions'){
        // return requested label for prescriptions table
        if ($label == "pid") {
                $returnedLabel = "patient_id";
        }
        else if ($label == "date") {
                $returnedLabel = 'date_added';
        }
        else{
                // unknown label, so return the original label
                $returnedLabel = $label;
        }
  }
  else if($table == 'procedure_result'){
        // return requested label for prescriptions table
    if ($label == "pid") {
      $returnedLabel = "procedure_order.patient_id";
    }
    else if ($label == "date") {
      $returnedLabel = "procedure_report.date_collected";
    }
    else {
      // unknown label, so return the original label
      $returnedLabel = $label;
    }
  }
  else {
    // return requested label for default tables
    if ($label == "pid") {
      $returnedLabel = "pid";
    }
    else if ($label == "date") {
      $returnedLabel = "`date`";
    }
    else {
      // unknown label, so return the original label
      $returnedLabel = $label;
    }
  }

  return $returnedLabel;
}

/**
 * Simple function to avoid processing of duplicate actions
 *
 * @param  string  $actions  2-dimensional array with all current active targets
 * @param  string  $action   array of selected target to test for duplicate
 * @return boolean           true if duplicate, false if not duplicate
 */
function is_duplicate_action($actions,$action) {
  foreach ($actions as $row) {
    if ($row['category'] == $action['category'] &&
        $row['item'] == $action['item'] &&
        $row['value'] == $action['value']) {
      // Is a duplicate
      return true;
    }
  }

  // Not a duplicate
  return false;
}

/**
 * Calculate the reminder dates.
 *
 * This function returns an array that contains three elements (each element is a date).
 * <pre>The three dates are:
 *   first date is before the target date (past_due) (default of 1 month)
 *   second date is the target date (due)
 *   third date is after the target date (soon_due) (default of 2 weeks)
 * </pre>
 *
 * @param  string  $rule        id(string) of selected rule
 * @param  string  $dateTarget  target date(format Y-m-d H:i:s).
 * @param  string  $type        either 'patient_reminder' or 'clinical_reminder'
 * @return array                see above for description of returned array
 */
function calculate_reminder_dates($rule, $dateTarget='',$type) {

  // Set date to current if not set
  $dateTarget = ($dateTarget) ? $dateTarget : date('Y-m-d H:i:s');

  // Collect the current date settings (to ensure not skip)
  $res = resolve_reminder_sql($rule, $type.'_current');
  if (!empty($res)) {
    $row = $res[0];
    if ($row ['method_detail'] == "SKIP") {
      $dateTarget = "SKIP";
    }
  }

  // Collect the past_due date
  $past_due_date = "";
  $res = resolve_reminder_sql($rule, $type.'_post');
  if (!empty($res)) {
    $row = $res[0];
    if ($row ['method_detail'] == "week") {
      $past_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " -" . $row ['value'] . " week"));
    }
    if ($row ['method_detail'] == "month") {
      $past_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " -" . $row ['value'] . " month"));
    }
    if ($row ['method_detail'] == "hour") {
      $past_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " -" . $row ['value'] . " hour"));
    }
    if ($row ['method_detail'] == "SKIP") {
      $past_due_date = "SKIP";
    }
  }
  else {
    // empty settings, so use default of one month
    $past_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " -1 month"));
  }

  // Collect the soon_due date
  $soon_due_date = "";
  $res = resolve_reminder_sql($rule, $type.'_pre');
  if (!empty($res)) {
    $row = $res[0];
    if ($row ['method_detail'] == "week") {
      $soon_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " +" . $row ['value'] . " week"));
    }
    if ($row ['method_detail'] == "month") {
      $soon_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " +" . $row ['value'] . " month"));
    }
    if ($row ['method_detail'] == "hour") {
      $soon_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " -" . $row ['value'] . " hour"));
    }
    if ($row ['method_detail'] == "SKIP") {
      $soon_due_date = "SKIP";
    }
  }
  else {
    // empty settings, so use default of one month
    $soon_due_date = date("Y-m-d H:i:s", strtotime($dateTarget . " +2 week"));
  }

  // Return the array of three dates
  return array($soon_due_date,$dateTarget,$past_due_date);
}

/**
 * Adds an action into the reminder array
 *
 * @param  array  $reminderOldArray  Contains the current array of reminders
 * @param  array  $reminderNew       Array of a new reminder
 * @return array                     Reminders
 */
function reminder_results_integrate($reminderOldArray, $reminderNew) {

  $results = array();

  // If reminderArray is empty, then insert new reminder
  if (empty($reminderOldArray)) {
    array_push($results, $reminderNew);
    return $results;
  }

  // If duplicate reminder, then replace the old one
  $duplicate = false;
  foreach ($reminderOldArray as $reminderOld) {
    if (  $reminderOld['pid'] == $reminderNew['pid'] &&
          $reminderOld['category'] == $reminderNew['category'] &&
          $reminderOld['item'] == $reminderNew['item']) {
      array_push($results, $reminderNew);
      $duplicate = true;
    }
    else {
      array_push($results, $reminderOld);
    }
  }

  // If a new reminder, then insert the new reminder
  if (!$duplicate) {
    array_push($results, $reminderNew);
  }

  return $results;
}

/**
 * Compares number of items with requested comparison operator
 *
 * @param  string   $comp       Comparison operator(eq,ne,gt,ge,lt,le)  
 * @param  string   $thres      Threshold used in comparison
 * @param  integer  $num_items  Number of items
 * @return boolean              Comparison results    
 */
function itemsNumberCompare($comp, $thres, $num_items) {

  if ( ($comp == "eq") && ($num_items == $thres) ) {
    return true;
  }
  else if ( ($comp == "ne") && ($num_items != $thres) && ($num_items > 0) ) {
    return true;
  }
  else if ( ($comp == "gt") && ($num_items > $thres) ) {
    return true;
  }
  else if ( ($comp == "ge") && ($num_items >= $thres) ) {
    return true;
  }
  else if ( ($comp == "lt") && ($num_items < $thres) && ($num_items > 0) ) {
    return true;
  }
  else if ( ($comp == "le") && ($num_items <= $thres) && ($num_items > 0) ) {
    return true;
  }
  else {
    return false;
  }
}

/**
 * Converts a text comparison operator to sql equivalent
 *
 * @param  string  $comp  Comparison operator(eq,ne,gt,ge,lt,le)
 * @return string         contains sql compatible comparison operator
 */
function convertCompSql($comp) {

  if ($comp == "eq") {
    return "=";
  }
  else if ($comp == "ne") {
    return "!=";
  }
  else if ($comp == "gt") {
    return ">";
  }
  else if ($comp == "ge") {
    return ">=";
  }
  else if ($comp == "lt") {
    return "<";
  }
  else { // ($comp == "le")
    return "<=";
  }
}


/**
 * Function to find age in years (with decimal) on the target date
 *
 * @param  string  $dob     date of birth
 * @param  string  $target  date to calculate age on
 * @return float            years(decimal) from dob to target(date)
 */
function convertDobtoAgeYearDecimal($dob,$target) { 
    $ageInfo=parseAgeInfo($dob,$target);
    return $ageInfo['age']; 
}  

/**
 * Function to find age in months (with decimal) on the target date
 *
 * @param  string  $dob     date of birth
 * @param  string  $target  date to calculate age on
 * @return float            months(decimal) from dob to target(date)
 */
function convertDobtoAgeMonthDecimal($dob,$target) {
    $ageInfo=parseAgeInfo($dob,$target);
    return $ageInfo['age_in_months']; 
}

/**
 * Function to calculate the percentage for reports.
 *
 * @param  integer  $pass_filter     number of patients that pass filter
 * @param  integer  $exclude_filter  number of patients that are excluded
 * @param  integer  $pass_target     number of patients that pass target
 * @return string                    Number formatted into a percentage
 */
function calculate_percentage($pass_filt,$exclude_filt,$pass_targ) {
  if ($pass_filt > 0) {
    $perc = number_format(($pass_targ/($pass_filt-$exclude_filt))*100,4) . xl('%');
  }
  else {
    $perc = "0". xl('%');
  }
  return $perc;
}