interface/drugs/drugs.inc.php

   1 <?php
   2 // Copyright (C) 2006-2010 Rod Roark <rod@sunsetsystems.com>
   3 //
   4 // This program is free software; you can redistribute it and/or
   5 // modify it under the terms of the GNU General Public License
   6 // as published by the Free Software Foundation; either version 2
   7 // of the License, or (at your option) any later version.
   8 //
   9 // Modified 7-2009 by BM in order to migrate using the form,
  10 // unit, route, and interval lists with the
  11 // functions in openemr/library/options.inc.php .
  12 // These lists are based on the constants found in the
  13 // openemr/library/classes/Prescription.class.php file.
  14
  15 $substitute_array = array('', xl('Allowed'), xl('Not Allowed'));
  16
  17 function send_drug_email($subject, $body) {
  18   require_once ($GLOBALS['srcdir'] . "/classes/class.phpmailer.php");
  19   $recipient = $GLOBALS['practice_return_email_path'];
  20   if (empty($recipient)) return;
  21   $mail = new PHPMailer();
  22   $mail->SetLanguage("en", $GLOBALS['fileroot'] . "/library/" );
  23   $mail->From = $recipient;
  24   $mail->FromName = 'In-House Pharmacy';
  25   $mail->isMail();
  26   $mail->Host = "localhost";
  27   $mail->Mailer = "mail";
  28   $mail->Body = $body;
  29   $mail->Subject = $subject;
  30   $mail->AddAddress($recipient);
  31   if(!$mail->Send()) {
  32     error_log("There has been a mail error sending to " . $recipient .
  33       " " . $mail->ErrorInfo);
  34   }
  35 }
  36
  37 function sellDrug($drug_id, $quantity, $fee, $patient_id=0, $encounter_id=0,
  38   $prescription_id=0, $sale_date='', $user='', $default_warehouse='') {
  39
  40   if (empty($patient_id))   $patient_id   = $GLOBALS['pid'];
  41   if (empty($sale_date))    $sale_date    = date('Y-m-d');
  42   if (empty($user))         $user         = $_SESSION['authUser'];
  43
  44   // error_log("quantity = '$quantity'"); // debugging
  45
  46   if (empty($default_warehouse)) {
  47     // Get the default warehouse, if any, for the user.
  48     $rowuser = sqlQuery("SELECT default_warehouse FROM users WHERE username = '$user'");
  49     $default_warehouse = $rowuser['default_warehouse'];
  50   }
  51
  52   // Get relevant options for this product.
  53   $rowdrug = sqlQuery("SELECT allow_combining, reorder_point, name " .
  54     "FROM drugs WHERE drug_id = '$drug_id'");
  55   $allow_combining = $rowdrug['allow_combining'];
  56
  57   // Combining is never allowed for prescriptions and will not work with
  58   // dispense_drug.php.
  59   if ($prescription_id) $allow_combining = 0;
  60
  61   $rows = array();
  62   // $firstrow = false;
  63   $qty_left = $quantity;
  64   $bad_lot_list = '';
  65   $total_on_hand = 0;
  66
  67   // If the user has a default warehouse, sort those lots first.
  68   $orderby = ($default_warehouse === '') ?
  69     "" : "di.warehouse_id != '$default_warehouse', ";
  70   $orderby .= "lo.seq, di.expiration, di.lot_number, di.inventory_id";
  71
  72   // Retrieve lots in order of expiration date within warehouse preference.
  73   $res = sqlStatement("SELECT di.*, lo.option_id, lo.seq " .
  74     "FROM drug_inventory AS di " .
  75     "LEFT JOIN list_options AS lo ON lo.list_id = 'warehouse' AND " .
  76     "lo.option_id = di.warehouse_id " .
  77     "WHERE " .
  78     "di.drug_id = '$drug_id' AND di.destroy_date IS NULL " .
  79     "ORDER BY $orderby");
  80
  81   // First pass.  Pick out lots to be used in filling this order, figure out
  82   // if there is enough quantity on hand and check for lots to be destroyed.
  83   while ($row = sqlFetchArray($res)) {
  84     // Warehouses with seq > 99 are not available.
  85     $seq = empty($row['seq']) ? 0 : $row['seq'] + 0;
  86     if ($seq > 99) continue;
  87
  88     $on_hand = $row['on_hand'];
  89     $expired = (!empty($row['expiration']) && $row['expiration'] <= $sale_date);
  90     if ($expired || $on_hand < $quantity) {
  91       $tmp = $row['lot_number'];
  92       if (! $tmp) $tmp = '[missing lot number]';
  93       if ($bad_lot_list) $bad_lot_list .= ', ';
  94       $bad_lot_list .= $tmp;
  95     }
  96     if ($expired) continue;
  97
  98     /*****************************************************************
  99     // Note the first row in case total quantity is insufficient and we are
 100     // allowed to go negative.
 101     if (!$firstrow) $firstrow = $row;
 102     *****************************************************************/
 103
 104     $total_on_hand += $on_hand;
 105
 106     if ($on_hand > 0 && $qty_left > 0 && ($allow_combining || $on_hand >= $qty_left)) {
 107       $rows[] = $row;
 108       $qty_left -= $on_hand;
 109     }
 110   }
 111
 112   if ($bad_lot_list) {
 113     send_drug_email("Possible lot destruction needed",
 114       "The following lot(s) are expired or were too small to fill the " .
 115       "order for patient $patient_id: $bad_lot_list\n");
 116   }
 117
 118   /*******************************************************************
 119   if (empty($firstrow)) return 0; // no suitable lots exist
 120   // This can happen when combining is not allowed.  We will use the
 121   // first row and take it negative.
 122   if (empty($rows)) {
 123     $rows[] = $firstrow;
 124     $qty_left -= $firstrow['on_hand'];
 125   }
 126   *******************************************************************/
 127
 128   // The above was an experiment in permitting a negative lot quantity.
 129   // We decided that was a bad idea, so now we just error out if there
 130   // is not enough on hand.
 131   if ($qty_left > 0) return 0;
 132
 133   $sale_id = 0;
 134   $qty_final = $quantity; // remaining unallocated quantity
 135   $fee_final = $fee;      // remaining unallocated fee
 136
 137   // Second pass.  Update the database.
 138   foreach ($rows as $row) {
 139     $inventory_id = $row['inventory_id'];
 140
 141     /*****************************************************************
 142     $thisqty = $row['on_hand'];
 143     if ($qty_left > 0) {
 144       $thisqty += $qty_left;
 145       $qty_left = 0;
 146     }
 147     else if ($thisqty > $qty_final) {
 148       $thisqty = $qty_final;
 149     }
 150     *****************************************************************/
 151     $thisqty = min($qty_final, $row['on_hand']);
 152
 153     $qty_final -= $thisqty;
 154
 155     // Compute the proportional fee for this line item.  For the last line
 156     // item take the remaining unallocated fee to avoid round-off error.
 157     if ($qty_final)
 158       $thisfee = sprintf('%0.2f', $fee * $thisqty / $quantity);
 159     else
 160       $thisfee = sprintf('%0.2f', $fee_final);
 161     $fee_final -= $thisfee;
 162
 163     // Update inventory and create the sale line item.
 164     sqlStatement("UPDATE drug_inventory SET " .
 165       "on_hand = on_hand - $thisqty " .
 166       "WHERE inventory_id = $inventory_id");
 167     $sale_id = sqlInsert("INSERT INTO drug_sales ( " .
 168       "drug_id, inventory_id, prescription_id, pid, encounter, user, " .
 169       "sale_date, quantity, fee ) VALUES ( " .
 170       "'$drug_id', '$inventory_id', '$prescription_id', '$patient_id', " .
 171       "'$encounter_id', '$user', '$sale_date', '$thisqty', '$thisfee' )");
 172   }
 173
 174   // If appropriate, generate email to notify that re-order is due.
 175   if (($total_on_hand - $quantity) <= $rowdrug['reorder_point']) {
 176     send_drug_email("Product re-order required",
 177       "Product '" . $rowdrug['name'] . "' has reached its reorder point.\n");
 178   }
 179
 180   // If combining is allowed then $sale_id will be just the last inserted ID,
 181   // and it serves only to indicate that everything worked.  Otherwise there
 182   // can be only one inserted row and this is its ID.
 183   return $sale_id;
 184 }
 185 ?>