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lib.php
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lib.php
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<?PHP // $Id$
/// Library of functions and constants for module wiki
/// (replace wiki with the name of your module and delete this line)
$wiki_CONSTANT = 7; /// for example
$site = get_site();
$WIKI_TYPES = array ('teacher' => get_string('defaultcourseteacher'),
'group' => get_string('groups',"wiki"),
'student' => get_string('defaultcoursestudent') );
define("EWIKI_ESCAPE_AT", 0); # For the algebraic filter
function wiki_add_instance($wiki) {
/// Given an object containing all the necessary data,
/// (defined by the form in mod.html) this function
/// will create a new instance and return the id number
/// of the new instance.
$wiki->timemodified = time();
# May have to add extra stuff in here #
/// Determine the pagename for this wiki and save.
$wiki->pagename = wiki_page_name($wiki);
/// Check 'check boxes'. The variables won't be set at all of they were deselected.
$wiki->disablecamelcase = (isset($wiki->disablecamelcase)) ? 1 : 0;
$wiki->setpageflags = (isset($wiki->setpageflags)) ? 1 : 0;
$wiki->removepages = (isset($wiki->removepages)) ? 1 : 0;
$wiki->strippages = (isset($wiki->strippages)) ? 1 : 0;
$wiki->revertchanges = (isset($wiki->revertchanges)) ? 1 : 0;
return insert_record("wiki", $wiki);
}
function wiki_update_instance($wiki) {
/// Given an object containing all the necessary data,
/// (defined by the form in mod.html) this function
/// will update an existing instance with new data.
/// Determine the pagename for this wiki.
$wiki->pagename = wiki_page_name($wiki);
/// Check 'check boxes'. The variables won't be set at all of they were deselected.
$wiki->disablecamelcase = (isset($wiki->disablecamelcase)) ? 1 : 0;
$wiki->setpageflags = (isset($wiki->setpageflags)) ? 1 : 0;
$wiki->removepages = (isset($wiki->removepages)) ? 1 : 0;
$wiki->strippages = (isset($wiki->strippages)) ? 1 : 0;
$wiki->revertchanges = (isset($wiki->revertchanges)) ? 1 : 0;
$wiki->timemodified = time();
$wiki->id = $wiki->instance;
return update_record("wiki", $wiki);
}
/// Delete all Directories recursively
function wiki_rmdir($basedir) {
$handle = @opendir($basedir);
if($handle) {
while (false!==($folder = readdir($handle))) {
if($folder != "." && $folder != ".." && $Folder != "CVS") {
wiki_rmdir("$basedir/$folder"); // recursive
}
}
closedir($handle);
}
@rmdir($basedir);
}
function wiki_delete_instance($id) {
/// Given an ID of an instance of this module,
/// this function will permanently delete the instance
/// and any data that depends on it.
global $CFG;
if (! $wiki = get_record("wiki", "id", $id)) {
return false;
}
$result = true;
#Delete Files
### Should probably check regardless of this setting in case its been changed...
if($wiki->ewikiacceptbinary) {
if ($basedir = $CFG->dataroot."/".$wiki->course."/".$CFG->moddata."/wiki/$id") {
if ($files = get_directory_list($basedir)) {
foreach ($files as $file) {
#if ($file != $exception) {
unlink("$basedir/$file");
notify("Existing file '$file' has been deleted!");
#}
}
}
#if (!$exception) { // Delete directory as well, if empty
wiki_rmdir("$basedir");
#}
}
}
# Delete any dependent records here #
if (! delete_records("wiki", "id", $wiki->id)) {
$result = false;
}
/// Delete all wiki_entries and wiki_pages.
if (($wiki_entries = wiki_get_entries($wiki)) !== false) {
foreach ($wiki_entries as $wiki_entry) {
if (! delete_records("wiki_pages", "wiki", "$wiki_entry->id")) {
$result = false;
}
if (! delete_records("wiki_entries", "id", "$wiki_entry->id")) {
$result = false;
}
}
}
return $result;
}
function wiki_user_outline($course, $user, $mod, $wiki) {
/// Return a small object with summary information about what a
/// user has done with a given particular instance of this module
/// Used for user activity reports.
/// $return->time = the time they did it
/// $return->info = a short text description
return $return;
}
function wiki_user_complete($course, $user, $mod, $wiki) {
/// Print a detailed representation of what a user has done with
/// a given particular instance of this module, for user activity reports.
return true;
}
function wiki_print_recent_activity($course, $isteacher, $timestart) {
/// Given a course and a time, this module should find recent activity
/// that has occurred in wiki activities and print it out.
/// Return true if there was output, or false is there was none.
global $CFG;
return false; // True if anything was printed, otherwise false
}
function wiki_cron () {
/// Function to be run periodically according to the moodle cron
/// This function searches for things that need to be done, such
/// as sending out mail, toggling flags etc ...
global $CFG;
return true;
}
function wiki_grades($wikiid) {
/// Must return an array of grades for a given instance of this module,
/// indexed by user. It also returns a maximum allowed grade.
return NULL;
}
function wiki_get_participants($wikiid) {
//Must return an array of user records (all data) who are participants
//for a given instance of wiki. Must include every user involved
//in the instance, independient of his role (student, teacher, admin...)
//See other modules as example.
return false;
}
//////////////////////////////////////////////////////////////////////////////////////
/// Any other wiki functions go here. Each of them must have a name that
/// starts with wiki_
function wiki_wiki_name($wikiname) {
/// Return the passed in string in Wiki name format.
/// Remove any leading and trailing whitespace, capitalize all the words
/// and then remove any internal whitespace.
if (wiki_is_wiki_name($wikiname)) {
return $wikiname;
}
else {
/// Create uppercase words and remove whitespace.
$wikiname = preg_replace("/(\w+)\s/", "$1", ucwords(trim($wikiname)));
/// Check again - there may only be one word.
if (wiki_is_wiki_name($wikiname)) {
return $wikiname;
}
/// If there is only one word, append default wiki name to it.
else {
return $wikiname.get_string('wikidefaultpagename', 'wiki');
}
}
}
function wiki_is_wiki_name($wikiname) {
/// Check for correct wikiname syntax and return true or false.
/// If there are spaces between the words, incorrect format.
if (preg_match_all('/\w+/', $wikiname, $out) > 1) {
return false;
}
/// If there isn't more than one group of uppercase letters separated by
/// lowercase letters or '_', incorrect format.
else if (preg_match_all('/[A-Z]+[a-z_]+/', $wikiname, $out) > 1) {
return true;
}
else {
return false;
}
}
function wiki_page_name(&$wiki) {
/// Determines the wiki's page name and returns it.
if (!empty($wiki->initialcontent)) {
$ppos = strrpos($wiki->initialcontent, '/');
if ($ppos === false) {
$pagename = $wiki->initialcontent;
}
else {
$pagename = substr($wiki->initialcontent, $ppos+1);
}
}
else if (!empty($wiki->pagename)) {
$pagename = $wiki->pagename;
}
else {
$pagename = $wiki->name;
}
return $pagename;
}
function wiki_content_dir(&$wiki) {
/// Determines the wiki's default content directory (if there is one).
global $CFG;
if (!empty($wiki->initialcontent)) {
$ppos = strrpos($wiki->initialcontent, '/');
if ($ppos === false) {
$subdir = '';
}
else {
$subdir = substr($wiki->initialcontent, 0, $ppos+1);
}
$contentdir = $CFG->dataroot.'/'.$wiki->course.'/'.$subdir;
}
else {
$contentdir = false;
}
return $contentdir;
}
function wiki_get_course_wikis($courseid, $wtype='*') {
/// Returns all wikis for the specified course and optionally of the specified type.
$select = 'course = '.$courseid;
if ($wtype != '*') {
$select .= ' AND wtype = \''.$wtype.'\'';
}
return get_records_select('wiki', $select, 'id');
}
function wiki_has_entries(&$wiki) {
/// Returns true if wiki already has wiki entries; otherwise false.
return record_exists('wiki_entries', 'wikiid', $wiki->id);
}
function wiki_get_entries(&$wiki, $byindex=NULL) {
/// Returns an array with all wiki entries indexed by entry id; false if there are none.
/// If the optional $byindex is specified, returns the entries indexed by that field.
/// Valid values for $byindex are 'student', 'group'.
if ($byindex == 'student') {
return get_records('wiki_entries', 'wikiid', $wiki->id, '',
'userid,id,wikiid,course,groupid,pagename,timemodified');
}
else if ($byindex == 'group') {
return get_records('wiki_entries', 'wikiid', $wiki->id, '',
'groupid,id,wikiid,course,userid,pagename,timemodified');
}
else {
return get_records('wiki_entries', 'wikiid', $wiki->id);
}
}
function wiki_get_default_entry(&$wiki, &$course, $userid=0, $groupid=0) {
/// Returns the wiki entry according to the wiki type.
/// Optionally, will return wiki entry for $userid student wiki, or
/// $groupid group or teacher wiki.
/// Creates one if it needs to and it can.
global $USER;
/// If the wiki entry doesn't exist, can this user create it?
if (($wiki_entry = wiki_get_entry($wiki, $course, $userid, $groupid)) === false) {
if (wiki_can_add_entry($wiki, $USER, $course, $userid, $groupid)) {
wiki_add_entry($wiki, $course, $userid, $groupid);
if (($wiki_entry = wiki_get_entry($wiki, $course, $userid, $groupid)) === false) {
error("Could not add wiki entry.");
}
}
}
return $wiki_entry;
}
function wiki_get_entry(&$wiki, &$course, $userid=0, $groupid=0) {
/// Returns the wiki entry according to the wiki type.
/// Optionally, will return wiki entry for $userid student wiki, or
/// $groupid group or teacher wiki.
global $USER;
switch ($wiki->wtype) {
case 'student':
/// If a specific user was requested, return it, if allowed.
if ($userid and wiki_user_can_access_student_wiki($wiki, $userid, $course)) {
$wentry = wiki_get_student_entry($wiki, $userid);
}
/// If there is no entry for this user, check if this user is a teacher.
else if (!$wentry = wiki_get_student_entry($wiki, $USER->id)) {
/* if (isteacher($course->id, $USER->id)) {
/// If this user is a teacher, return the first entry.
if ($wentries = wiki_get_entries($wiki)) {
$wentry = current($wentries);
}
}*/
}
break;
case 'group':
/// If there is a groupmode, get the user's group id.
$groupmode = groupmode($course, $wiki);
/// If a specific group was requested, return it, if allowed.
if ($groupid and wiki_user_can_access_group_wiki($wiki, $groupid, $course)) {
$wentry = wiki_get_group_entry($wiki, $groupid);
}
else if ($groupmode) {
/// If there is no entry for this user, check if this user is a teacher.
if (!$wentry = wiki_get_group_entry($wiki, mygroupid($course->id))) {
/* if (isteacher($course->id, $USER->id)) {
/// If this user is a teacher, return the first entry.
if ($wentries = wiki_get_entries($wiki)) {
$wentry = current($wentries);
}
} */
}
}
/// If mode is 'nogroups', then groupid is zero.
else {
$wentry = wiki_get_group_entry($wiki, 0);
}
break;
case 'teacher':
/// If there is a groupmode, get the user's group id.
if (groupmode($course, $wiki)) {
$groupid = $groupid ? $groupid : mygroupid($course->id);
}
/// If a specific group was requested, return it, if allowed.
if (wiki_user_can_access_teacher_wiki($wiki, $groupid, $course)) {
$wentry = wiki_get_teacher_entry($wiki, $groupid);
}
break;
}
return $wentry;
}
function wiki_get_teacher_entry(&$wiki, $groupid=0) {
/// Returns the wiki entry for the wiki teacher type.
return get_record('wiki_entries', 'wikiid', $wiki->id, 'course', $wiki->course, 'groupid', $groupid);
}
function wiki_get_group_entry(&$wiki, $groupid=null) {
/// Returns the wiki entry for the given group.
return get_record('wiki_entries', 'wikiid', $wiki->id, 'groupid', $groupid);
}
function wiki_get_student_entry(&$wiki, $userid=null) {
/// Returns the wiki entry for the given student.
global $USER;
if (is_null($userid)) {
$userid = $USER->id;
}
return get_record('wiki_entries', 'wikiid', $wiki->id, 'userid', $userid);
}
function wiki_get_other_wikis(&$wiki, &$user, &$course, $currentid=0) {
/// Returns a list of other wikis to display, depending on the type, group and user.
/// Returns the key containing the currently selected entry as well.
global $CFG, $ME, $id;
$wikis = false;
$groupmode = groupmode($course, $wiki);
$mygroupid = mygroupid($course->id);
$isteacher = isteacher($course->id, $user->id);
$isteacheredit = isteacheredit($course->id, $user->id);
switch ($wiki->wtype) {
case 'student':
/// Get all the existing entries for this wiki.
$wiki_entries = wiki_get_entries($wiki, 'student');
if ($isteacher and (SITEID != $course->id)) {
/// If the user is an editing teacher, or a non-editing teacher not assigned to a group, show all student
/// wikis, regardless of creation.
if ((SITEID != $course->id) and ($isteacheredit or ($groupmode == NOGROUPS))) {
if ($students = get_course_students($course->id)) {
/// Default pagename is dependent on the wiki settings.
$defpagename = empty($wiki->pagename) ? get_string('wikidefaultpagename', 'wiki') : $wiki->pagename;
foreach ($students as $student) {
/// If this student already has an entry, use its pagename.
if ($wiki_entries[$student->id]) {
$pagename = $wiki_entries[$student->id]->pagename;
}
else {
$pagename = $defpagename;
}
$key = $ME.'?id='.$id.'&userid='.$student->id.'&page='.$pagename;
$wikis[$key] = fullname($student).':'.$pagename;
}
}
}
else if ($groupmode == SEPARATEGROUPS) {
if ($students = get_group_students($mygroupid)) {
$defpagename = empty($wiki->pagename) ? get_string('wikidefaultpagename', 'wiki') : $wiki->pagename;
foreach ($students as $student) {
/// If this student already has an entry, use its pagename.
if ($wiki_entries[$student->id]) {
$pagename = $wiki_entries[$student->id]->pagename;
}
else {
$pagename = $defpagename;
}
$key = $ME.'?id='.$id.'&userid='.$student->id.'&page='.$pagename;
$wikis[$key] = fullname($student).':'.$pagename;
}
}
}
else if ($groupmode == VISIBLEGROUPS) {
/// Get all students in your group.
if ($students = get_group_students($mygroupid)) {
$defpagename = empty($wiki->pagename) ? get_string('wikidefaultpagename', 'wiki') : $wiki->pagename;
foreach ($students as $student) {
/// If this student already has an entry, use its pagename.
if ($wiki_entries[$student->id]) {
$pagename = $wiki_entries[$student->id]->pagename;
}
else {
$pagename = $defpagename;
}
$key = $ME.'?id='.$id.'&userid='.$student->id.'&page='.$pagename;
$wikis[$key] = fullname($student).':'.$pagename;
}
}
/// Get all student wikis created, regardless of group.
$sql = 'SELECT w.id, w.userid, w.pagename, u.firstname, u.lastname '
.' FROM '.$CFG->prefix.'wiki_entries w, '.$CFG->prefix.'user u '
.' WHERE w.wikiid = '.$wiki->id.' AND u.id = w.userid '
.' ORDER BY w.id';
$wiki_entries = get_records_sql($sql);
$wiki_entries=is_array($wiki_entries)?$wiki_entries:array();
foreach ($wiki_entries as $wiki_entry) {
$key = $ME.'?id='.$id.'&userid='.$wiki_entry->userid.'&page='.$wiki_entry->pagename;
$wikis[$key] = fullname($wiki_entry).':'.$wiki_entry->pagename;
if ($currentid == $wiki_entry->id) {
$wikis['selected'] = $key;
}
}
}
}
else {
/// A user can see other student wikis if they are a member of the same
/// group (for separate groups) or there are visible groups, or if this is
/// a site-level wiki, and they are an administrator.
if (($groupmode == VISIBLEGROUPS) or
((SITEID == $course->id) and isadmin())) {
$viewall = true;
}
else if ($groupmode == SEPARATEGROUPS) {
$viewall = mygroupid($course->id);
}
else {
$viewall = false;
}
if ($viewall !== false) {
$sql = 'SELECT w.id, w.userid, w.pagename, u.firstname, u.lastname '
.' FROM '.$CFG->prefix.'wiki_entries w, '.$CFG->prefix.'user u '
.' WHERE w.wikiid = '.$wiki->id.' AND u.id = w.userid '
.' ORDER BY w.id';
$wiki_entries = get_records_sql($sql);
$wiki_entries=is_array($wiki_entries)?$wiki_entries:array();
foreach ($wiki_entries as $wiki_entry) {
if (($viewall === true) or ismember($viewall, $wiki_entry->userid)) {
$key = $ME.'?id='.$id.'&userid='.$wiki_entry->userid.'&page='.$wiki_entry->pagename;
$wikis[$key] = fullname($wiki_entry).':'.$wiki_entry->pagename;
if ($currentid == $wiki_entry->id) {
$wikis['selected'] = $key;
}
}
}
}
}
break;
case 'group':
/// If the user is an editing teacher, or a non-editing teacher not assigned to a group, show all group
/// wikis, regardless of creation.
/// Get all the existing entries for this wiki.
$wiki_entries = wiki_get_entries($wiki, 'group');
if ($groupmode and ($isteacheredit or ($isteacher and !$mygroupid))) {
if ($groups = get_groups($course->id)) {
$defpagename = empty($wiki->pagename) ? get_string('wikidefaultpagename', 'wiki') : $wiki->pagename;
foreach ($groups as $group) {
/// If this group already has an entry, use its pagename.
if (isset($wiki_entries[$group->id])) {
$pagename = $wiki_entries[$group->id]->pagename;
}
else {
$pagename = $defpagename;
}
$key = $ME.'?id='.$id.($group->id?"&groupid=".$group->id:"").'&page='.$pagename;
$wikis[$key] = $group->name.':'.$pagename;
}
}
}
/// A user can see other group wikis if there are visible groups.
else if ($groupmode == VISIBLEGROUPS) {
$sql = 'SELECT w.id, w.groupid, w.pagename, g.name as gname '
.' FROM '.$CFG->prefix.'wiki_entries w, '.$CFG->prefix.'groups g '
.' WHERE w.wikiid = '.$wiki->id.' AND g.id = w.groupid '
.' ORDER BY w.groupid';
$wiki_entries = get_records_sql($sql);
$wiki_entries=is_array($wiki_entries)?$wiki_entries:array();
foreach ($wiki_entries as $wiki_entry) {
$key = $ME.'?id='.$id.($wiki_entry->groupid?"&groupid=".$wiki_entry->groupid:"").'&page='.$wiki_entry->pagename;
$wikis[$key] = $wiki_entry->gname.':'.$wiki_entry->pagename;
if ($currentid == $wiki_entry->id) {
$wikis['selected'] = $key;
}
}
}
break;
case 'teacher':
if ($isteacher) {
/// If the user is an editing teacher, or a non-editing teacher not assigned to a group, show all
/// teacher wikis, regardless of creation.
if ($groupmode and ($isteacheredit or ($isteacher and !$mygroupid))) {
if ($groups = get_groups($course->id)) {
$defpagename = empty($wiki->pagename) ? get_string('wikidefaultpagename', 'wiki') : $wiki->pagename;
foreach ($groups as $group) {
/// If this group already has an entry, use its pagename.
if ($wiki_entries[$group->id]) {
$pagename = $wiki_entries[$group->id]->pagename;
}
else {
$pagename = $defpagename;
}
$key = $ME.'?id='.$id.($group->id?"&groupid=".$group->id:"").'&page='.$pagename;
$wikis[$key] = $group->name.':'.$pagename;
}
}
}
/// A teacher can see all other group teacher wikis.
else if ($groupmode) {
$sql = 'SELECT w.id, w.groupid, w.pagename, g.name as gname '
.' FROM '.$CFG->prefix.'wiki_entries w, '.$CFG->prefix.'groups g '
.' WHERE w.wikiid = '.$wiki->id.' AND g.id = w.groupid '
.' ORDER BY w.groupid';
$wiki_entries = get_records_sql($sql);
$wiki_entries=is_array($wiki_entries)?$wiki_entries:array();
foreach ($wiki_entries as $wiki_entry) {
$key = $ME.'?id='.$id.($wiki_entry->groupid?"&groupid=".$wiki_entry->groupid:"").'&page='.$wiki_entry->pagename;
$wikis[$key] = $wiki_entry->gname.':'.$wiki_entry->pagename;
if ($currentid == $wiki_entry->id) {
$wikis['selected'] = $key;
}
}
}
}
else {
/// A user can see other teacher wikis if they are a teacher, a member of the same
/// group (for separate groups) or there are visible groups.
if ($groupmode == VISIBLEGROUPS) {
$viewall = true;
}
else if ($groupmode == SEPARATEGROUPS) {
$viewall = $mygroupid;
}
else {
$viewall = false;
}
if ($viewall !== false) {
$sql = 'SELECT w.id, w.groupid, w.pagename, g.name as gname '
.' FROM '.$CFG->prefix.'wiki_entries w, '.$CFG->prefix.'groups g '
.' WHERE w.wikiid = '.$wiki->id.' AND g.id = w.groupid '
.' ORDER BY w.groupid';
$wiki_entries = get_records_sql($sql);
$wiki_entries=is_array($wiki_entries)?$wiki_entries:array();
foreach ($wiki_entries as $wiki_entry) {
if (($viewall === true) or $viewall == $wiki_entry->groupid) {
$key = $ME.'?id='.$id.($wiki_entry->groupid?"&groupid=".$wiki_entry->groupid:"").'&page='.$wiki_entry->pagename;
$wikis[$key] = $wiki_entry->gname.':'.$wiki_entry->pagename;
if ($currentid == $wiki_entry->id) {
$wikis['selected'] = $key;
}
}
}
}
}
break;
}
return $wikis;
}
function wiki_add_entry(&$wiki, &$course, $userid=0, $groupid=0) {
/// Adds a new wiki entry of the specified type, unless already entered.
/// No checking is done here. It is assumed that the caller has the correct
/// privileges to add this entry.
global $USER;
/// If this wiki already has a wiki_type entry, return false.
if (wiki_get_entry($wiki, $course, $userid, $groupid) !== false) {
return false;
}
switch ($wiki->wtype) {
case 'student':
$wiki_entry->wikiid = $wiki->id;
$wiki_entry->userid = $userid ? $userid : $USER->id;
$wiki_entry->pagename = wiki_page_name($wiki);
$wiki_entry->timemodified = time();
break;
case 'group':
/// Get the groupmode. It's been added to the wiki object.
$groupmode = groupmode($course, $wiki);
/// If there is a groupmode, get the group id.
if ($groupmode) {
$groupid = $groupid ? $groupid : mygroupid($course->id);
}
/// If mode is 'nogroups', then groupid is zero.
else {
$groupid = 0;
}
$wiki_entry->wikiid = $wiki->id;
$wiki_entry->groupid = $groupid;
$wiki_entry->pagename = wiki_page_name($wiki);
$wiki_entry->timemodified = time();
break;
case 'teacher':
/// Get the groupmode. It's been added to the wiki object.
$groupmode = groupmode($course, $wiki);
/// If there is a groupmode, get the user's group id.
if ($groupmode and $groupid == 0) {
$groupid = mygroupid($course->id);
}
$wiki_entry->wikiid = $wiki->id;
$wiki_entry->course = $wiki->course;
$wiki_entry->groupid = $groupid;
$wiki_entry->pagename = wiki_page_name($wiki);
$wiki_entry->timemodified = time();
break;
}
return insert_record("wiki_entries", $wiki_entry, true);
}
function wiki_can_add_entry(&$wiki, &$user, &$course, $userid=0, $groupid=0) {
/// Returns true or false if the user can add a wiki entry for this wiki.
/// Get the groupmode. It's been added to the wiki object.
$groupmode = groupmode($course, $wiki);
$mygroupid = mygroupid($course->id);
switch ($wiki->wtype) {
case 'student':
/// A student can create their own wiki, if they are a member of that course.
/// A user can create their own wiki at the site level.
if ($userid == 0) {
return (isstudent($course->id, $user->id) or
((SITEID == $course->id) and !empty($user) and !isguest()));
}
/// An editing teacher can create any student wiki, or
/// a non-editing teacher, if not assigned to a group can create any student wiki, or if assigned to a group can
/// create any student wiki in their group.
else {
return ((($userid == $user->id) and isstudent($course->id, $user->id)) or isteacheredit($course->id) or
(isteacher($course->id) and (!$groupmode or $mygroupid == 0 or (ismember($mygroupid, $userid)))));
}
break;
case 'group':
/// If mode is 'nogroups', then all participants can add wikis.
if (!$groupmode) {
return (isstudent($course->id, $user->id) or isteacher($course->id, $user->id) or
((SITEID == $course->id) and !empty($user) and !isguest()));
}
/// If not requesting a group, must be a member of a group.
else if ($groupid == 0) {
return ($mygroupid != 0);
}
/// If requesting a group, must be an editing teacher, a non-editing teacher with no assigned group,
/// or a non-editing teacher requesting their group.
else {
return (isteacheredit($course->id) or
(isteacher($course->id) and ($mygroupid == 0 or $mygroupid == $groupid)));
}
break;
case 'teacher':
/// If mode is 'nogroups', then all teachers can add wikis.
if (!$groupmode) {
return (isteacher($course->id, $user->id) or ((SITEID == $course->id) and isadmin()));
}
/// If not requesting a group, must be a member of a group.
else if ($groupid == 0) {
return ($mygroupid != 0 and isteacher($course->id));
}
/// If there is a group mode, non-editing teachers with an assigned group, can only create wikis
/// in their group. Non-editing teachers with no assigned group and editing teachers can create any wiki.
else {
return (isteacheredit($course->id) or
(isteacher($course->id) and ($mygroupid == 0 or $mygroupid == $groupid)));
}
break;
}
return false;
}
function wiki_can_edit_entry(&$wiki_entry, &$wiki, &$user, &$course) {
/// Returns true or false if the user can edit this wiki entry.
$can_edit = false;
$groupmode = groupmode($course, $wiki);
$mygroupid = mygroupid($course->id);
/// Editing teacher's and admins can edit all wikis, non-editing teachers can edit wikis in their groups,
/// or all wikis if group mode is 'no groups' or they don't belong to a group.
if (isadmin($user->id) or isteacheredit($course->id, $user->id) or
((!$groupmode or $mygroupid == 0) and isteacher($course->id, $user->id))) {
$can_edit = true;
}
else {
switch ($wiki->wtype) {
/// Only a teacher or the owner of a student wiki can edit it.
case 'student':
$can_edit = (($user->id == $wiki_entry->userid) or
($groupmode and isteacher($course->id, $user->id) and
ismember($mygroupid, $wiki_entry->userid)));
break;
case 'group':
/// If there is a groupmode, determine the user's group status.
if ($groupmode) {
/// If the user is a member of the wiki group, they can edit the wiki.
$can_edit = ismember($wiki_entry->groupid, $user->id);
}
/// If mode is 'nogroups', then all participants can edit the wiki.
else {
$can_edit = (isstudent($course->id, $user->id) or isteacher($course->id, $user->id) or
((SITEID == $course->id) and !empty($user) and !isguest()));
}
break;
case 'teacher':
/// If there is a groupmode, determine the user's group status.
if ($groupmode) {
/// If the user is a member of the wiki group, they can edit the wiki.
$can_edit = (isteacher($course->id, $user->id) and ismember($wiki_entry->groupid, $user->id));
}
else {
$can_edit = (isteacher($course->id, $user->id) or ((SITEID == $course->id) and isadmin()));
}
break;
}
}
return $can_edit;
}
function wiki_user_can_access_student_wiki(&$wiki, $userid, &$course) {
global $USER;
/// Get the groupmode. It's been added to the wiki object.
$groupmode = groupmode($course, $wiki);
$usersgroup = mygroupid($course->id);
$isteacher = isteacher($course->id, $USER->id);
/// If this user is allowed to access this wiki then return TRUE.
/// *** THIS COULD BE A PROBLEM, IF STUDENTS COULD EVER BE PART OF MORE THAN ONE GROUP ***
/// A user can access a student wiki, if:
/// - it is their wiki,
/// - group mode is VISIBLEGROUPS,
/// - group mode is SEPARATEGROUPS, and the user is a member of the requested user's group,
/// - they are an editing teacher or administrator,
/// - they are a non-editing teacher not assigned to a specific group,
/// - they are a non-editing teacher and group mode is NOGROUPS.
/// - they are an administrator (mostly for site-level wikis).
if (($userid and ($USER->id == $userid)) or ($groupmode == VISIBLEGROUPS) or
(($groupmode == SEPARATEGROUPS) and ismember($usersgroup, $userid)) or
(isteacheredit($course->id, $USER->id)) or
(isteacher($course->id, $USER->id) and (!$usersgroup or ($groupmode == NOGROUPS))) or
(isadmin())) {
$can_access = true;
}
else {
$can_access = false;
}
return $can_access;
}
function wiki_user_can_access_group_wiki(&$wiki, $groupid, &$course) {
global $USER;
/// Get the groupmode. It's been added to the wiki object.
$groupmode = groupmode($course, $wiki);
$usersgroup = mygroupid($course->id);
$isteacher = isteacher($course->id, $USER->id);
/// A user can access a group wiki, if:
/// - group mode is NOGROUPS,
/// - group mode is VISIBLEGROUPS,
/// - group mode is SEPARATEGROUPS, and they are a member of the requested group,
/// - they are an editing teacher or administrator,
/// - they are a non-editing teacher not assigned to a specific group.
if (($groupmode == NOGROUPS) or ($groupmode == VISIBLEGROUPS) or
(($groupmode == SEPARATEGROUPS) and ($usersgroup == $groupid)) or
(isteacheredit($course->id, $USER->id)) or
(isteacher($course->id, $USER->id) and !$usersgroup)) {
$can_access = true;
}
else {
$can_access = false;
}
return $can_access;
}
function wiki_user_can_access_teacher_wiki(&$wiki, $groupid, &$course) {
global $USER;
/// Get the groupmode. It's been added to the wiki object.
$groupmode = groupmode($course, $wiki);
/// A user can access a teacher wiki, if:
/// - group mode is NOGROUPS,
/// - group mode is VISIBLEGROUPS,
/// - group mode is SEPARATEGROUPS, and they are a member of the requested group,
/// - they are a teacher or administrator,
if (($groupmode == NOGROUPS) or ($groupmode == VISIBLEGROUPS) or
(($groupmode == SEPARATEGROUPS) and (mygroupid($course->id) == $groupid)) or
(isteacher($course->id, $USER->id))){
$can_access = true;
}
else {
$can_access = false;
}
return $can_access;
}
function wiki_get_owner(&$wiki_entry) {
if ($wiki_entry->userid > 0) {
$user = get_record('user', 'id', $wiki_entry->userid);
$owner = fullname($user);
}
else if ($wiki_entry->groupid > 0) {
$group = get_record('groups', 'id', $wiki_entry->groupid);
$owner = $group->name;
}
else if ($wiki_entry->course > 0) {
$course = get_record('course', 'id', $wiki_entry->course);
$owner = $course->shortname;
}
else {
$owner = '- '.get_string("ownerunknown","wiki").' -';
}
return $owner;
}
function wiki_print_search_form($cmid, $search="", $userid, $groupid, $return=false) {
global $CFG;
# TODO: Add Group and User !!!
$output = "<form name=\"search\" action=\"$CFG->wwwroot/mod/wiki/view.php\">";
$output .= "<font size=\"-1\">";
$output .= "<input value=\"".get_string("searchwiki", "wiki").":\" type=\"submit\">";
$output .= "<input name=\"id\" type=\"hidden\" value=\"$cmid\">";
$output = $output.($groupid?"<input name=\"groupid\" type=\"hidden\" value=\"$groupid\">":"");
$output = $output.($userid?"<input name=\"userid\" type=\"hidden\" value=\"$userid\">":"");
$output .= "<input name=\"q\" type=\"text\" size=\"20\" value=\"$search\">".' ';
$output .= "</font>";
$output .= "<input name=\"page\" type=\"hidden\" value=\"SearchPages\">";
$output .= "</form>";
if ($return) {
return $output;
}
echo $output;
}
function wiki_print_wikilinks_block($cmid, $binary=false, $return=false) {
/// Prints a link-list of special wiki-pages
global $CFG, $ewiki_title;
$links=array();
$links["SiteMap"]=get_string("sitemap", "wiki");
$links["PageIndex"]=get_string("pageindex", "wiki");
$links["NewestPages"]=get_string("newestpages", "wiki");
$links["MostVisitedPages"]=get_string("mostvisitedpages", "wiki");
$links["MostOftenChangedPages"]=get_string("mostoftenchangedpages", "wiki");
$links["UpdatedPages"]=get_string("updatedpages", "wiki");
$links["OrphanedPages"]=get_string("orphanedpages", "wiki");
$links["WantedPages"]=get_string("wantedpages", "wiki");
$links["WikiExport"]=get_string("wikiexport", "wiki");
if($binary) {
$links["FileDownload"]=get_string("filedownload", "wiki");
}
popup_form(EWIKI_SCRIPT, $links, "wikilinks", "", get_string("choosewikilinks", "wiki"), "", "", $return);
}
function wiki_print_page_actions($cmid, $specialpages, $page, $action, $binary=false, $canedit=true) {
/// Displays actions which can be performed on the page
$page=array();
// Edit this Page
if (in_array($action, array("edit", "links", "info", "attachments"))) {
$page["view/$page"]=get_string("viewpage","wiki");
}
if ($canedit && !in_array($page, $specialpages) && $action != "edit") {
$page["edit/$page"]=get_string("editthispage","wiki");
}
if ($action != "links") {
$page["links/$page"]=get_string("backlinks","wiki");
}
if ($canedit && !in_array($page, $specialpages) && $action!="info") {
$page["info/$page"]=get_string("pageinfo","wiki");
}
if($canedit && $binary && !in_array($page, $specialpages) && $action != "attachments") {
$page["attachments/$page"]=get_string("attachments","wiki");
}
popup_form(EWIKI_SCRIPT, $page, "wikiactions", "", get_string("action", "wiki"), "", "", false);
}
function wiki_print_administration_actions($wiki, $cmid, $userid, $groupid, $page, $noeditor, $course) {
/// Displays actions which can be performed on the page
global $ME;
/// Create the URL
$ewscript = 'admin.php?id='.$cmid;
if (isset($userid) && $userid!=0) $ewscript .= '&userid='.$userid;
if (isset($groupid) && $groupid!=0) $ewscript .= '&groupid='.$groupid;
if (isset($page)) $ewscript .= '&page='.$page;
$ewscript.="&action=";
/// Build that action array according to wiki flags.
$action = array();
$isteacher = isteacher($course->id);
if ($wiki->setpageflags or $isteacher) {
$action['setpageflags'] = get_string('setpageflags', 'wiki');