blog/index.php

   1 <?php
   2
   3 /**
   4  * file index.php
   5  * index page to view blogs. if no blog is specified then site wide entries are shown
   6  * if a blog id is specified then the latest entries from that blog are shown
   7  */
   8
   9 require_once(dirname(dirname(__FILE__)).'/config.php');
  10 require_once($CFG->dirroot .'/blog/lib.php');
  11 require_once($CFG->dirroot .'/blog/locallib.php');
  12 require_once($CFG->dirroot .'/course/lib.php');
  13 require_once($CFG->dirroot .'/tag/lib.php');
  14 require_once($CFG->dirroot .'/comment/lib.php');
  15
  16 $id       = optional_param('id', null, PARAM_INT);
  17 $start    = optional_param('formstart', 0, PARAM_INT);
  18 $tag      = optional_param('tag', '', PARAM_NOTAGS);
  19 $userid   = optional_param('userid', null, PARAM_INT);
  20 $tagid    = optional_param('tagid', null, PARAM_INT);
  21 $modid    = optional_param('modid', null, PARAM_INT);
  22 $entryid  = optional_param('entryid', null, PARAM_INT);
  23 $groupid  = optional_param('groupid', null, PARAM_INT);
  24 $courseid = optional_param('courseid', null, PARAM_INT);
  25 $search   = optional_param('search', null, PARAM_RAW);
  26
  27 comment::init();
  28
  29 $url_params = compact('id', 'start', 'tag', 'userid', 'tagid', 'modid', 'entryid', 'groupid', 'courseid', 'search');
  30 foreach ($url_params as $var => $val) {
  31     if (empty($val)) {
  32         unset($url_params[$var]);
  33     }
  34 }
  35 $PAGE->set_url('/blog/index.php', $url_params);
  36
  37 if (empty($CFG->enableblogs)) {
  38     print_error('blogdisable', 'blog');
  39 }
  40
  41 //correct tagid if a text tag is provided as a param
  42 if (!empty($tag)) {
  43     if ($tagrec = $DB->get_record_sql("SELECT * FROM {tag} WHERE ". $DB->sql_like('name', '?', false), array("%$tag%"))) {
  44         $tagid = $tagrec->id;
  45     } else {
  46         unset($tagid);
  47     }
  48 }
  49
  50 // add courseid if modid or groupid is specified: This is used for navigation and title
  51 if (!empty($modid) && empty($courseid)) {
  52     $courseid = $DB->get_field('course_modules', 'course', array('id'=>$modid));
  53 }
  54
  55 if (!empty($groupid) && empty($courseid)) {
  56     $courseid = $DB->get_field('groups', 'courseid', array('id'=>$groupid));
  57 }
  58
  59 $sitecontext = context_system::instance();
  60 // Blogs are always in system context.
  61 $PAGE->set_context($sitecontext);
  62
  63 // check basic permissions
  64 if ($CFG->bloglevel == BLOG_GLOBAL_LEVEL) {
  65     // everybody can see anything - no login required unless site is locked down using forcelogin
  66     if ($CFG->forcelogin) {
  67         require_login();
  68     }
  69
  70 } else if ($CFG->bloglevel == BLOG_SITE_LEVEL) {
  71     // users must log in and can not be guests
  72     require_login();
  73     if (isguestuser()) {
  74         // they must have entered the url manually...
  75         print_error('blogdisable', 'blog');
  76     }
  77
  78 } else if ($CFG->bloglevel == BLOG_USER_LEVEL) {
  79     // users can see own blogs only! with the exception of ppl with special cap
  80     require_login();
  81
  82 } else {
  83     // weird!
  84     print_error('blogdisable', 'blog');
  85 }
  86
  87
  88 if (!$userid && has_capability('moodle/blog:view', $sitecontext) && $CFG->bloglevel > BLOG_USER_LEVEL) {
  89     if ($entryid) {
  90         if (!$entryobject = $DB->get_record('post', array('id'=>$entryid))) {
  91             print_error('nosuchentry', 'blog');
  92         }
  93         $userid = $entryobject->userid;
  94     }
  95 } else if (!$userid) {
  96     $userid = $USER->id;
  97 }
  98
  99 if (!empty($modid)) {
 100     if ($CFG->bloglevel < BLOG_SITE_LEVEL) {
 101         print_error(get_string('nocourseblogs', 'blog'));
 102     }
 103     if (!$mod = $DB->get_record('course_modules', array('id' => $modid))) {
 104         print_error(get_string('invalidmodid', 'blog'));
 105     }
 106     $courseid = $mod->course;
 107 }
 108
 109 if ((empty($courseid) ? true : $courseid == SITEID) && empty($userid)) {
 110     if ($CFG->bloglevel < BLOG_SITE_LEVEL) {
 111         print_error('siteblogdisable', 'blog');
 112     }
 113     if (!has_capability('moodle/blog:view', $sitecontext)) {
 114         print_error('cannotviewsiteblog', 'blog');
 115     }
 116
 117     $COURSE = $DB->get_record('course', array('format'=>'site'));
 118     $courseid = $COURSE->id;
 119 }
 120
 121 if (!empty($courseid)) {
 122     if (!$course = $DB->get_record('course', array('id'=>$courseid))) {
 123         print_error('invalidcourseid');
 124     }
 125
 126     $courseid = $course->id;
 127     require_login($course);
 128
 129     if (!has_capability('moodle/blog:view', $sitecontext)) {
 130         print_error('cannotviewcourseblog', 'blog');
 131     }
 132 } else {
 133     $coursecontext = context_course::instance(SITEID);
 134 }
 135
 136 if (!empty($groupid)) {
 137     if ($CFG->bloglevel < BLOG_SITE_LEVEL) {
 138         print_error('groupblogdisable', 'blog');
 139     }
 140
 141     if (! $group = groups_get_group($groupid)) {
 142         print_error(get_string('invalidgroupid', 'blog'));
 143     }
 144
 145     if (!$course = $DB->get_record('course', array('id'=>$group->courseid))) {
 146         print_error('invalidcourseid');
 147     }
 148
 149     $coursecontext = context_course::instance($course->id);
 150     $courseid = $course->id;
 151     require_login($course);
 152
 153     if (!has_capability('moodle/blog:view', $sitecontext)) {
 154         print_error(get_string('cannotviewcourseorgroupblog', 'blog'));
 155     }
 156
 157     if (groups_get_course_groupmode($course) == SEPARATEGROUPS && !has_capability('moodle/site:accessallgroups', $coursecontext)) {
 158         if (!groups_is_member($groupid)) {
 159             print_error('notmemberofgroup');
 160         }
 161     }
 162 }
 163
 164 if (!empty($userid)) {
 165     if ($CFG->bloglevel < BLOG_USER_LEVEL) {
 166         print_error('blogdisable', 'blog');
 167     }
 168
 169     if (!$user = $DB->get_record('user', array('id'=>$userid))) {
 170         print_error('invaliduserid');
 171     }
 172
 173     if ($user->deleted) {
 174         echo $OUTPUT->header();
 175         echo $OUTPUT->heading(get_string('userdeleted'));
 176         echo $OUTPUT->footer();
 177         die;
 178     }
 179
 180     if ($USER->id == $userid) {
 181         if (!has_capability('moodle/blog:create', $sitecontext)
 182           && !has_capability('moodle/blog:view', $sitecontext)) {
 183             print_error('donothaveblog', 'blog');
 184         }
 185     } else {
 186         if (!has_capability('moodle/blog:view', $sitecontext) || !blog_user_can_view_user_entry($userid)) {
 187             print_error('cannotviewcourseblog', 'blog');
 188         }
 189
 190         $PAGE->navigation->extend_for_user($user);
 191     }
 192 }
 193
 194 $courseid = (empty($courseid)) ? SITEID : $courseid;
 195
 196
 197 $blogheaders = blog_get_headers();
 198
 199 if ($CFG->enablerssfeeds) {
 200     $rsscontext = null;
 201     $filtertype = null;
 202     $thingid = null;
 203     list($thingid, $rsscontext, $filtertype) = blog_rss_get_params($blogheaders['filters']);
 204     if (empty($rsscontext)) {
 205         $rsscontext = context_system::instance();
 206     }
 207     $rsstitle = $blogheaders['heading'];
 208
 209     //check we haven't started output by outputting an error message
 210     if ($PAGE->state == moodle_page::STATE_BEFORE_HEADER) {
 211         blog_rss_add_http_header($rsscontext, $rsstitle, $filtertype, $thingid, $tagid);
 212     }
 213
 214     //this works but there isn't a great place to put the link
 215     //blog_rss_print_link($rsscontext, $filtertype, $thingid, $tagid);
 216 }
 217
 218 echo $OUTPUT->header();
 219
 220 echo $OUTPUT->heading($blogheaders['heading'], 2);
 221
 222 $bloglisting = new blog_listing($blogheaders['filters']);
 223 $bloglisting->print_entries();
 224
 225 echo $OUTPUT->footer();
 226
 227 add_to_log($courseid, 'blog', 'view', 'index.php?entryid='.$entryid.'&amp;tagid='.@$tagid.'&amp;tag='.$tag, 'view blog entry');