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locallib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Local library file for ouwiki. These are non-standard functions that are used
* only by ouwiki.
*
* @package mod
* @subpackage ouwiki
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or late
**/
/* Make sure this isn't being directly accessed */
defined('MOODLE_INTERNAL') || die();
/* Include the files that are required by this module */
require_once($CFG->dirroot . '/mod/ouwiki/lib.php');
require_once($CFG->dirroot . '/mod/ouwiki/difflib.php');
require_once($CFG->libdir . '/portfolio/caller.php');
// subwikis
define('OUWIKI_SUBWIKIS_SINGLE', 0);
define('OUWIKI_SUBWIKIS_GROUPS', 1);
define('OUWIKI_SUBWIKIS_INDIVIDUAL', 2);
// locks
define('OUWIKI_LOCK_PERSISTENCE', 120);
define('OUWIKI_LOCK_RECONFIRM', 60);
define('OUWIKI_LOCK_NOJS', 15*60);
define('OUWIKI_LOCK_TIMEOUT', 30*60);
define('OUWIKI_SESSION_LOCKS', 'ouwikilocks'); // Session variable used to store wiki locks
// format params
define('OUWIKI_PARAMS_LINK', 0);
define('OUWIKI_PARAMS_FORM', 1);
define('OUWIKI_PARAMS_URL', 2);
define('OUWIKI_PARAMS_ARRAY', 3);
define('OUWIKI_FORMAT_HTML', 'html');
define('OUWIKI_FORMAT_PDF', 'pdf');
define('OUWIKI_FORMAT_TEMPLATE', 'template');
define('OUWIKI_FORMAT_HTML_PRINT', 'print');
// pages
define('OUWIKI_GETPAGE_REQUIREVERSION', 0);
define('OUWIKI_GETPAGE_ACCEPTNOVERSION', 1);
define('OUWIKI_GETPAGE_CREATE', 2);
define('OUWIKI_PAGESIZE', 50);
define('OUWIKI_MAXRESULTS', 50);
define('OUWIKI_RESULTSPERPAGE', 10);
// general
define('OUWIKI_LINKS_SQUAREBRACKETS', '/\[\[(.*?)\]\]/');
define('OUWIKI_SYSTEMUSER', -1);
define('OUWIKI_TIMEOUT_EXTRA', 60);
define('OUWIKI_FEEDSIZE', 50);
// participation
define('OUWIKI_NO_PARTICIPATION', 0);
define('OUWIKI_MY_PARTICIPATION', 1);
define('OUWIKI_USER_PARTICIPATION', 2);
define('OUWIKI_PARTICIPATION_PERPAGE', 100);
// User preference
define('OUWIKI_PREF_HIDEANNOTATIONS', 'ouwiki_hide_annotations');
function ouwiki_dberror($error, $source = null) {
if (!$source) {
$backtrace = debug_backtrace();
$source = preg_replace('@^.*/(.*)(\.php)?$@', '\1',
$backtrace[0]['file']).'/'.$backtrace[0]['line'];
}
print_error('Database problem: '.$error.' (code OUWIKI-'.$source.')');
}
function ouwiki_error($text, $source = null) {
if (!$source) {
$backtrace = debug_backtrace();
$source = preg_replace('^.*/(.*)(\.php)?$^', '$1',
$backtrace[0]['file']).'/'.$backtrace[0]['line'];
}
print_error("Wiki error: $text (code OUWIKI-$source)");
}
/**
* Gets cm, ouwiki and subwiki based on selected activity id and subwiki id
* Populates vars sent, overriding initial values
* @param int $selectedact cm id
* @param int $selectedsubwiki subwiki id
* @param null $selectedouwiki empty
* @param object $course
* @param bool $ignorechecks Set to true to ignore activity + subwiki access checks
*/
function ouwiki_get_wikiinfo(&$selectedact, &$selectedsubwiki, &$selectedouwiki, $course,
$ignorechecks = false) {
global $DB;
$modinfo = get_fast_modinfo($course);
$selectedact = $modinfo->get_cm($selectedact);
$selectedcontext = context_module::instance($selectedact->id);
// Basic checks that it is OK to continue using activity.
if (!$ignorechecks && (!$selectedact->uservisible ||
!has_capability('mod/ouwiki:view', $selectedcontext))) {
ouwiki_error('You are not able to access the selected wiki.');
}
// Get sub wiki selected - joining to wiki activity and cm to verify all correct.
$sql = 'SELECT ouwiki.*, sw.userid, sw.groupid FROM {ouwiki_subwikis} sw
JOIN {ouwiki} ouwiki on ouwiki.id = sw.wikiid
JOIN {course_modules} cm on cm.instance = ouwiki.id
and cm.module = (SELECT id FROM {modules} where name = ?)
WHERE sw.id = ?';
$selectedouwiki = $DB->get_record_sql($sql, array('ouwiki', $selectedsubwiki), MUST_EXIST);
// Get our subwiki using locallib function to check access.
if (!$ignorechecks) {
$selectedsubwiki = ouwiki_get_subwiki($course, $selectedouwiki, $selectedact, $selectedcontext,
$selectedouwiki->groupid, $selectedouwiki->userid, false);
} else {
$selectedsubwiki = $DB->get_record('ouwiki_subwikis', array('id' => $selectedsubwiki));
}
}
/**
* Obtains the appropriate subwiki object for a request. If one cannot
* be obtained, either creates one or calls error() and stops.
*
* @param object $ouwiki Wiki object
* @param object $cm Course-module object
* @param object $context Context to use for checking permissions
* @param int $groupid Group ID or 0 to use any appropriate group
* @param int $userid User ID or 0 to use current user
* @param bool $create If true, creates a wiki if it doesn't exist
* @return mixed Object with the data from the subwiki table. Also has extra 'canedit' field
* set to true if that's allowed.
*/
function ouwiki_get_subwiki($course, $ouwiki, $cm, $context, $groupid, $userid, $create = null) {
global $USER, $DB;
switch($ouwiki->subwikis) {
case OUWIKI_SUBWIKIS_SINGLE:
// Removed AND groupid IS NULL AND userid IS NULL
$subwiki = $DB->get_record_select('ouwiki_subwikis', 'wikiid = ?', array($ouwiki->id));
if ($subwiki) {
ouwiki_set_extra_subwiki_fields($subwiki, $ouwiki, $context);
return $subwiki;
}
if ($create) {
$subwiki = ouwiki_create_subwiki($ouwiki, $cm, $course);
ouwiki_set_extra_subwiki_fields($subwiki, $ouwiki, $context);
ouwiki_init_pages($course, $cm, $ouwiki, $subwiki);
return $subwiki;
}
ouwiki_error('Wiki does not exist. View wikis before attempting other actions.');
break;
case OUWIKI_SUBWIKIS_GROUPS:
if (empty($groupid)) {
$groupid = groups_get_activity_group($cm, true);
}
if (!$groupid) {
// Active group not known - get first group available.
$groups = groups_get_activity_allowed_groups($cm);
if (!$groups) {
if (!groups_get_all_groups($cm->course, 0, $cm->groupingid)) {
ouwiki_error('This wiki cannot be displayed because it is a group wiki,
but no groups have been set up for the course (or grouping, if selected).');
} else {
ouwiki_error('You do not have access to any of the groups in this wiki.');
}
}
$groupid = reset($groups)->id;
}
$othergroup = !groups_is_member($groupid);
// Removed AND userid IS NULL
$subwiki = $DB->get_record_select('ouwiki_subwikis', 'wikiid = ? AND groupid = ?', array($ouwiki->id, $groupid));
if ($subwiki) {
ouwiki_set_extra_subwiki_fields($subwiki, $ouwiki, $context, $othergroup);
return $subwiki;
}
if ($create) {
$subwiki = ouwiki_create_subwiki($ouwiki, $cm, $course, null, $groupid);
ouwiki_set_extra_subwiki_fields($subwiki, $ouwiki, $context, $othergroup);
ouwiki_init_pages($course, $cm, $ouwiki, $subwiki);
return $subwiki;
}
ouwiki_error('Wiki does not exist. View wikis before attempting other actions.');
break;
case OUWIKI_SUBWIKIS_INDIVIDUAL:
if ($userid == 0) {
$userid = $USER->id;
}
$otheruser = false;
if ($userid != $USER->id) {
$otheruser = true;
// Is user allowed to view everybody?
if (!has_capability('mod/ouwiki:viewallindividuals', $context)) {
// Nope. Are they allowed to view people in same group?
if (!has_capability('mod/ouwiki:viewgroupindividuals', $context)) {
ouwiki_error('You do not have access to view somebody else\'s wiki.');
}
// Check user is in same group. Note this isn't now restricted to the
// module grouping
$ourgroups = groups_get_all_groups($cm->course, $USER->id);
$theirgroups = groups_get_all_groups($cm->course, $userid);
$found = false;
foreach ($ourgroups as $ourgroup) {
foreach ($theirgroups as $theirgroup) {
if ($ourgroup->id == $theirgroup->id) {
$found = true;
break;
}
}
if ($found) {
break;
}
}
if (!$found) {
ouwiki_error('You do not have access to view this user\'s wiki.');
}
}
}
// OK now find wiki
// Removed AND groupid IS NULL
$subwiki = $DB->get_record_select('ouwiki_subwikis', 'wikiid = ? AND userid = ?', array($ouwiki->id, $userid));
if ($subwiki) {
ouwiki_set_extra_subwiki_fields($subwiki, $ouwiki, $context, $otheruser, !$otheruser);
return $subwiki;
}
// Create one
if ($create) {
$subwiki = ouwiki_create_subwiki($ouwiki, $cm, $course, $userid);
ouwiki_set_extra_subwiki_fields($subwiki, $ouwiki, $context, $otheruser, !$otheruser);
ouwiki_init_pages($course, $cm, $ouwiki, $subwiki);
return $subwiki;
}
ouwiki_error('Wiki does not exist. View wikis before attempting other actions.');
break;
default:
ouwiki_error("Unexpected subwikis value: {$ouwiki->subwikis}");
}
}
// Create a new subwiki instance
function ouwiki_create_subwiki($ouwiki, $cm, $course, $userid = null, $groupid = null) {
global $DB;
$subwiki = new StdClass;
$subwiki->wikiid = $ouwiki->id;
$subwiki->magic = ouwiki_generate_magic_number();
$subwiki->userid = ($userid) ? $userid : $subwiki->magic;
$subwiki->groupid = ($groupid) ? $groupid : $subwiki->magic;
// Create Wiki!
try {
$subwiki->id = $DB->insert_record('ouwiki_subwikis', $subwiki);
} catch (Exception $e) {
ouwiki_dberror($e);
}
return $subwiki;
}
/**
* Initialises wiki pages. Does nothing unless there's a template.
*
* @param object $cm Course-module object
* @param object $subwiki Subwiki object
* @param object $ouwiki OU wiki object
*/
function ouwiki_init_pages($course, $cm, $ouwiki, $subwiki) {
global $CFG;
if (is_null($ouwiki->template)) {
return;
}
$fs = get_file_storage();
$zip = get_file_packer();
$context = context_module::instance($cm->id);
$filepath = '/'.$context->id.'/mod_ouwiki/template/'.$ouwiki->id.$ouwiki->template;
if ($file = $fs->get_file_by_hash(sha1($filepath)) AND !$file->is_directory()) {
if (strpos($ouwiki->template, '.xml') !== false) {
// XML template expected.
$xmlfile = $file;
} else {
// Zip format expected.
$xmlfilename = strtolower(get_string('template', 'mod_ouwiki')) . '.xml';
if (!$xmlfile = $fs->get_file($context->id, 'mod_ouwiki', 'template', $ouwiki->id, '/',
$xmlfilename)) {
// XML (and other files) not extracted yet. Do once only.
$zip->extract_to_storage($file, $context->id, 'mod_ouwiki', 'template', $ouwiki->id, '/');
$xmlfile = $fs->get_file($context->id, 'mod_ouwiki', 'template', $ouwiki->id, '/',
$xmlfilename);
}
}
$content = $xmlfile->get_content();
$xml = new DOMDocument();
$xml->loadXML($content);
if (!$xml) {
ouwiki_error('Failed to load wiki template - not valid XML.
Check file in XML viewer and correct.');
}
if ($xml->documentElement->tagName != 'wiki') {
ouwiki_error('Failed to load wiki template - must begin with <wiki> tag.');
}
for ($page = $xml->documentElement->firstChild; $page; $page = $page->nextSibling) {
if ($page->nodeType != XML_ELEMENT_NODE) {
continue;
}
if ($page->tagName != 'page') {
ouwiki_error('Failed to load wiki template - expected <page>.');
}
$title = null;
$xhtml = null;
$oldcontextid = null;
$oldpagever = null;
$oldversionid = null;
$attachments = array();
for ($child = $page->firstChild; $child; $child = $child->nextSibling) {
if ($child->nodeType != XML_ELEMENT_NODE) {
continue;
}
if (!$child->firstChild) {
$text = '';
} else {
if ($child->firstChild->nodeType != XML_TEXT_NODE &&
$child->firstChild->nodeType != XML_CDATA_SECTION_NODE) {
ouwiki_error('Failed to load wiki template - expected text node.');
}
if ($child->firstChild->nextSibling) {
ouwiki_error('Failed to load wiki template - expected single text node.');
}
$text = $child->firstChild->nodeValue;
}
switch ($child->tagName) {
case 'title':
// Replace non-breaking spaces with normal spaces in title
$title = str_replace(html_entity_decode(' ', ENT_QUOTES, 'UTF-8'), ' ', $text);
break;
case 'xhtml':
$xhtml = $text;
break;
case 'versionid':
$oldversionid = (int) $text;
break;
case 'attachments':
$attachments = explode('|', $text);
break;
default:
ouwiki_error('Failed to load wiki template - unexpected element <'.
$child->tagName.'>.');
}
}
if ($xhtml === null) {
ouwiki_error('Failed to load wiki template - required <xhtml>.');
}
$newverid = ouwiki_save_new_version($course, $cm, $ouwiki, $subwiki, $title, $xhtml,
-1, -1, -1, true);
// Copy any images or attachments associated with old version id.
if ($oldfiles = $fs->get_directory_files($context->id, 'mod_ouwiki', 'template',
$ouwiki->id, "/$oldversionid/")) {
foreach ($oldfiles as $oldfile) {
if (in_array($oldfile->get_filename(), $attachments)) {
// Copy this file to the version attachment record.
$fs->create_file_from_storedfile(array(
'contextid' => $context->id,
'filearea' => 'attachment',
'itemid' => $newverid,
'filepath' => '/'), $oldfile);
}
if (mimeinfo('string', $oldfile->get_filename()) == 'image') {
// Copy this image file to the version record.
$fs->create_file_from_storedfile(array(
'contextid' => $context->id,
'filearea' => 'content',
'itemid' => $newverid,
'filepath' => '/'), $oldfile);
}
}
}
}
} else {
ouwiki_error('Failed to load wiki template - file missing.');
}
}
/**
* Checks whether a user can edit a wiki, assuming that they can view it. This
* adds $subwiki->canedit, set to either true or false.
*
* @param object &$subwiki The subwiki object to which we are going to add a canedit variable
* @param object $ouwiki Wiki object
* @param object $context Context for permissions
* @param bool $othergroup If true, user is attempting to access a group that's not theirs
* @param bool $defaultwiki If true, user is accessing the wiki that they see by default
*/
function ouwiki_set_extra_subwiki_fields(&$subwiki, $ouwiki, $context, $othergroup = null,
$defaultwiki = null) {
// They must have the edit capability
$subwiki->canedit = has_capability('mod/ouwiki:edit', $context);
$subwiki->canannotate = has_capability('mod/ouwiki:annotate', $context);
$subwiki->annotation = $ouwiki->annotation;
// If wiki is not one of theirs, they need edit/annotate others or (historical) accesallgroups.
if ($othergroup) {
$subwiki->canedit = $subwiki->canedit &&
(has_capability('moodle/site:accessallgroups', $context) ||
has_capability('mod/ouwiki:editothers', $context));
$subwiki->canannotate = $subwiki->canannotate &&
(has_capability('moodle/site:accessallgroups', $context) ||
has_capability('mod/ouwiki:annotateothers', $context));
}
// Editing might be turned off for the wiki at the moment
$subwiki->canedit = $subwiki->canedit &&
(is_null($ouwiki->editbegin) || time() >= $ouwiki->editbegin);
$subwiki->canedit = $subwiki->canedit &&
(is_null($ouwiki->editend) || time() < $ouwiki->editend);
$subwiki->defaultwiki = $defaultwiki;
}
/**
* Checks whether the wiki is locked due to specific dates being set. (This is only used for
* informational display as the dates are already taken into account in the general checking
* for edit permission.)
*
* @param object $subwiki The subwiki object
* @param object $ouwiki Wiki object
* @param object $context Context for permissions
* @return False if not locked or a string of information if locked
*/
function ouwiki_timelocked($subwiki, $ouwiki, $context) {
// If they don't have edit permission anyhow then they won't be able to edit later
// so don't show this
if (!has_capability('mod/ouwiki:edit', $context)) {
return false;
}
if (!empty($ouwiki->editbegin) && time() < $ouwiki->editbegin) {
return get_string('timelocked_before', 'ouwiki',
userdate($ouwiki->editbegin, get_string('strftimedate')));
}
if (!empty($ouwiki->editend) && time() >= $ouwiki->editend) {
return get_string('timelocked_after', 'ouwiki');
}
return false;
}
/**
* Return the shared params needed to create a moodle_url
*
* @param string $page Name of page (null for startpage)
* @param object $subwiki Current subwiki object
* @param object $cm Course-module object
* @return Array
*/
function ouwiki_shared_url_params($pagename, $subwiki, $cm) {
$params = array('id' => $cm->id);
if (!$subwiki->defaultwiki) {
if ($subwiki->groupid) {
$params['group'] = $subwiki->groupid;
}
if ($subwiki->userid) {
$params['user'] = $subwiki->userid;
}
}
if (strtolower(trim($pagename)) !== strtolower(get_string('startpage', 'ouwiki')) &&
$pagename !== '') {
$params['page'] = $pagename;
}
return $params;
}
/**
* Prints the parameters that identify a particular wiki and could be used in view.php etc.
*
* @param string $page Name of page (empty string for startpage)
* @param object $subwiki Current subwiki object
* @param object $cm Course-module object
* @param int $type OUWIKI_PARAMS_xx constant
* @return mixed Either array or string depending on type
*/
function ouwiki_display_wiki_parameters($page, $subwiki, $cm, $type = OUWIKI_PARAMS_LINK) {
if ($type == OUWIKI_PARAMS_ARRAY) {
$output = array();
$output['id'] = $cm->id;
} else {
$output = ouwiki_get_parameter('id', $cm->id, $type);
}
if (!$subwiki->defaultwiki) {
if ($subwiki->groupid) {
if ($type == OUWIKI_PARAMS_ARRAY) {
$output['group'] = $subwiki->groupid;
} else {
$output .= ouwiki_get_parameter('group', $subwiki->groupid, $type);
}
}
if ($subwiki->userid) {
if ($type == OUWIKI_PARAMS_ARRAY) {
$output['user'] = $subwiki->userid;
} else {
$output .= ouwiki_get_parameter('user', $subwiki->userid, $type);
}
}
}
if ($page !== '') {
if ($type == OUWIKI_PARAMS_ARRAY) {
$output['page'] = $page;
} else {
$output .= ouwiki_get_parameter('page', $page, $type);
}
}
return $output;
}
// Internal function used by the above
function ouwiki_get_parameter($name, $value, $type) {
switch ($type) {
case OUWIKI_PARAMS_FORM:
$value = htmlspecialchars($value, ENT_QUOTES, 'UTF-8');
$output = "<input type='hidden' name='$name' value='$value' />";
break;
case OUWIKI_PARAMS_LINK:
$value = htmlspecialchars(urlencode($value), ENT_QUOTES, 'UTF-8');
$output = '';
if ($name != 'id') {
$output .= '&';
}
$output .= "$name=$value";
break;
case OUWIKI_PARAMS_URL:
$value = urlencode($value);
$output = '';
if ($name != 'id') {
$output .= '&';
}
$output .= "$name=$value";
break;
}
return $output;
}
/**
* Prints the subwiki selector if user has access to more than one subwiki.
* Also displays the currently-viewing subwiki.
*
* @param object $subwiki Current subwiki object
* @param object $ouwiki Wiki object
* @param object $cm Course-module object
* @param object $context Context for permissions
* @param object $course Course object
* @param string $actionurl
* @param string $querytext for use when changing groups against search criteria
*/
function ouwiki_display_subwiki_selector($subwiki, $ouwiki, $cm, $context, $course, $actionurl = 'view.php', $querytext = '') {
global $USER, $DB, $OUTPUT;
if ($ouwiki->subwikis == OUWIKI_SUBWIKIS_SINGLE) {
return '';
}
$choicefield = '';
switch($ouwiki->subwikis) {
case OUWIKI_SUBWIKIS_GROUPS:
$groups = groups_get_activity_allowed_groups($cm);
uasort($groups, create_function('$a,$b', 'return strcasecmp($a->name,$b->name);'));
$wikifor = htmlspecialchars($groups[$subwiki->groupid]->name);
// Do they have more than one?
if (count($groups) > 1) {
$choicefield = 'group';
$choices = $groups;
}
break;
case OUWIKI_SUBWIKIS_INDIVIDUAL:
$user = $DB->get_record('user', array('id' => $subwiki->userid),
'username, ' . user_picture::fields());
$wikifor = ouwiki_display_user($user, $cm->course);
$usernamefields = user_picture::fields('u');
if (has_capability('mod/ouwiki:viewallindividuals', $context)) {
// Get list of everybody...
$choicefield = 'user';
try {
$choices = $DB->get_records_sql('SELECT ' . $usernamefields .
' FROM {ouwiki_subwikis} sw
INNER JOIN {user} u ON sw.userid = u.id
WHERE sw.wikiid = ?
ORDER BY u.lastname, u.firstname', array($ouwiki->id));
} catch (Exception $e) {
ouwiki_dberror($e);
}
foreach ($choices as $choice) {
$choice->name = fullname($choice);
}
} else if (has_capability('mod/ouwiki:viewgroupindividuals', $context)) {
$choicefield = 'user';
$choices = array();
// User allowed to view people in same group
$theirgroups = groups_get_all_groups($cm->course, $USER->id,
$course->defaultgroupingid);
if (!$theirgroups) {
$theirgroups = array();
}
foreach ($theirgroups as $group) {
$members = groups_get_members($group->id, 'u.id, ' . $usernamefields);
foreach ($members as $member) {
$member->name = fullname($member);
$choices[$member->id] = $member;
}
}
}
break;
default:
ouwiki_error("Unexpected subwikis value: {$ouwiki->subwikis}");
}
$out = '<div class="ouw_subwiki">';
if ($choicefield && count($choices) > 1) {
$actionquery = '';
if (!empty($querytext)) {
$actionquery = '&query=' . rawurlencode($querytext);
}
$actionurl = '/mod/ouwiki/'. $actionurl .'?id=' . $cm->id . $actionquery;
$urlroot = new moodle_url($actionurl);
if ($choicefield == 'user') {
// Individuals.
$individualsmenu = array();
foreach ($choices as $choice) {
$individualsmenu[$choice->id] = $choice->name;
}
$select = new single_select($urlroot, 'user', $individualsmenu, $subwiki->userid, null, 'selectuser');
$select->label = get_string('wikifor', 'ouwiki');
$output = $OUTPUT->render($select);
$out .= '<div class="individualselector">'.$output.'</div>';
} else if ($choicefield == 'group') {
// Group mode.
$out .= groups_print_activity_menu($cm, $urlroot, true, true);
}
} else {
$out .= get_string('wikifor', 'ouwiki') . $wikifor;
}
$out .= '</div>';
return $out;
}
/**
* Returns an object containing the details from 'pages' and 'versions'
* tables for the current version of the specified (named) page, or false
* if page does not exist. Note that if the page exists but there are no
* versions, then the version fields will not be set.
*
* @param object $subwiki Current subwiki object
* @param string $pagename Name of desired page or null for start
* @param int $option OUWIKI_GETPAGE_xx value. Can use _ACCEPTNOVERSION
* if it's OK when a version doesn't exist, or _CREATE which creates
* pages when they don't exist.
* @return object Page-version object
*/
function ouwiki_get_current_page($subwiki, $pagename, $option = OUWIKI_GETPAGE_REQUIREVERSION) {
global $DB;
$params = array($subwiki->id);
$pagename_s = 'UPPER(p.title) = ?';
$params[] = core_text::strtoupper($pagename);
$jointype = $option == OUWIKI_GETPAGE_REQUIREVERSION ? 'JOIN' : 'LEFT JOIN';
$userfields = user_picture::fields('u', null, 'userid');
$sql = "SELECT p.id AS pageid, p.subwikiid, p.title, p.currentversionid, p.firstversionid,
p.locked, v.id AS versionid, v.xhtml, v.timecreated, v.userid, v.xhtmlformat,
v.wordcount, v.previousversionid, $userfields
FROM {ouwiki_pages} p
$jointype {ouwiki_versions} v ON p.currentversionid = v.id
LEFT JOIN {user} u ON v.userid = u.id
WHERE p.subwikiid = ? AND $pagename_s";
$pageversion = $DB->get_record_sql($sql, $params);
if (!$pageversion) {
if ($option != OUWIKI_GETPAGE_CREATE) {
return false;
}
// Create page
$pageversion = new StdClass;
$pageversion->subwikiid = $subwiki->id;
$pageversion->title = $pagename ? $pagename : '';
$pageversion->locked = 0;
$pageversion->firstversionid = null; // new page
try {
$pageversion->pageid = $DB->insert_record('ouwiki_pages', $pageversion);
} catch (Exception $e) {
ouwiki_dberror($e);
}
// Update any missing link records that might exist
$uppertitle = core_text::strtoupper($pagename);
try {
$DB->execute("UPDATE {ouwiki_links}
SET tomissingpage = NULL, topageid = ?
WHERE tomissingpage = ?
AND ? = (
SELECT p.subwikiid
FROM {ouwiki_versions} v
INNER JOIN {ouwiki_pages} p ON v.pageid = p.id
WHERE v.id = fromversionid)",
array($pageversion->pageid, $uppertitle, $subwiki->id));
} catch (Exception $e) {
ouwiki_dberror($e);
}
$pageversion->currentversionid = null;
$pageversion->versionid = null;
$pageversion->xhtml = null;
$pageversion->xhtmlformat = null;
$pageversion->timecreated = null;
$pageversion->userid = null;
$pageversion->previousversionid = null; // first version for page
return $pageversion;
}
// Ensure valid value for comparing time created
$timecreated = empty($pageversion->timecreated) ? 0 : $pageversion->timecreated;
$sql = "SELECT v.id, v.timecreated, v.userid, $userfields
FROM {ouwiki_versions} v
LEFT JOIN {user} u ON v.userid = u.id
WHERE v.pageid = ?
AND v.timecreated <= ?
AND v.deletedat IS NULL
ORDER BY v.id DESC";
$pageversion->recentversions = $DB->get_records_sql($sql,
array($pageversion->pageid, $timecreated), 0, 3);
return $pageversion;
}
/**
* Obtains all the pages from a subwiki as pageversion objects. As a special
* bonus feature, this query also returns the firstname and lastname of current
* author (person in userid field of version).
* @return array Array of pageversion objects (note: the 'recentversions'
* member is not available, but otherwise these are the same as from
* ouwiki_get_current_page) in same order as index page
*/
function ouwiki_get_subwiki_allpages($subwiki) {
global $DB;
$userfields = user_picture::fields('u', null, 'userid');
$sql = "SELECT p.id AS pageid, p.subwikiid, p.title, p.currentversionid, p.firstversionid,
p.locked, v.id AS versionid, v.xhtml, v.timecreated, v.userid, v.xhtmlformat,
v.wordcount, v.previousversionid, $userfields
FROM {ouwiki_pages} p
JOIN {ouwiki_versions} v ON p.currentversionid = v.id
LEFT JOIN {user} u ON u.id = v.userid
WHERE p.subwikiid = ? AND v.deletedat IS NULL
ORDER BY CASE WHEN p.title IS NULL THEN '' ELSE UPPER(p.title) END";
return $DB->get_records_sql($sql, array($subwiki->id));
}
/**
* Returns an object containing the details from 'pages' and 'versions'
* tables for the specified version of the specified (named) page, or false
* if page/version does not exist.
*
* @param object $subwiki Current subwiki object
* @param string $pagename Name of desired page or null for start
* @return object $pageversion Version object
*/
function ouwiki_get_page_version($subwiki, $pagename, $versionid) {
global $DB;
$userfields = user_picture::fields('u', null, 'userid');
$sql = "SELECT p.id AS pageid, p.subwikiid, p.title, p.currentversionid,
v.id AS versionid, v.xhtml, v.timecreated, v.userid, v.xhtmlformat,
v.deletedat, $userfields,
v.wordcount
FROM {ouwiki_pages} p, {ouwiki_versions} v
LEFT JOIN {user} u ON v.userid = u.id
WHERE p.subwikiid = ? AND v.id = ? AND UPPER(p.title) = ?";
$pagename = core_text::strtoupper($pagename);
$pageversion = $DB->get_record_sql($sql, array($subwiki->id, $versionid, $pagename));
$pageversion->recentversions = false;
return $pageversion;
}
/**
* Obtains details (versionid,timecreated plus user id,username,firstname,lastname)
* for the previous and next version after the specified one.
*
* @param object $pageversion Page/version object
* @return object Object with ->prev and ->next fields, either of which may be false
* to indicate (respectively) that this is the first or last version. If not false,
* these objects contain the fields mentioned above.
*/
function ouwiki_get_prevnext_version_details($pageversion) {
global $DB;
$userfields = user_picture::fields('u');
$prevnext = new StdClass;
$prevsql = "SELECT v.id AS versionid, v.timecreated, $userfields
FROM {ouwiki_versions} v
LEFT JOIN {user} u ON u.id = v.userid
WHERE v.pageid = ?
AND v.timecreated < ?
AND v.deletedat IS NULL
ORDER BY v.id DESC";
$prev = $DB->get_records_sql($prevsql,
array($pageversion->pageid, $pageversion->timecreated), 0, 1);
$prevnext->prev = $prev ? current($prev) : false;
$nextsql = "SELECT v.id AS versionid, v.timecreated, $userfields
FROM {ouwiki_versions} v
LEFT JOIN {user} u ON u.id = v.userid
WHERE v.pageid = ?
AND v.timecreated > ?
AND v.deletedat IS NULL
ORDER BY v.id";
$next = $DB->get_records_sql($nextsql,
array($pageversion->pageid, $pageversion->timecreated), 0, 1);
$prevnext->next = $next ? current($next) : false;
return $prevnext;
}
/**
* Returns an HTML span with appropriate class to indicate how recent something
* is by colour.
*/
function ouwiki_recent_span($time) {
$now = time();
if ($now-$time < 5*60) {
$category = 'ouw_recenter';
} else if ($now - $time < 4*60*60) {
$category = 'ouw_recent';
} else {
$category = 'ouw_recentnot';
}
return '<span class="'.$category.'">';
}
function ouwiki_internal_re_heading($matches) {
global $PAGE;
$ouwikioutput = $PAGE->get_renderer('mod_ouwiki');
return $ouwikioutput->ouwiki_internal_re_heading_bits($matches);
}
function ouwiki_internal_re_plain_heading_bits($matches) {
return '<div class="ouw_heading"><h'.$matches[1].' id="ouw_s'.$matches[2].'">'.$matches[3].
'</h'.$matches[1].'></div>';
}
function ouwiki_internal_re_internallinks($matches) {
// Used to replace links when displaying wiki all one one page
global $ouwiki_internallinks;
$details = ouwiki_get_wiki_link_details($matches[1]);
// See if it matches a known page
foreach ($ouwiki_internallinks as $indexpage) {
if (($details->page === '' && $indexpage->title === '') ||
(isset($indexpage->title) && strtoupper($indexpage->title) === strtoupper($details->page)) ) {
// Page matches, return link
return '<a class="ouw_wikilink" href="#' . $indexpage->pageid .
'">' . $details->title . '</a>';
}
}
// Page did not match, return title in brackets
return '(' . $details->title . ')';
}
function ouwiki_internal_re_wikilinks($matches) {
global $ouwiki_wikilinks;
$details = ouwiki_get_wiki_link_details($matches[1]);
return '<a class="ouw_wikilink" href="view.php?' .
ouwiki_display_wiki_parameters('', $ouwiki_wikilinks->subwiki,
$ouwiki_wikilinks->cm) .
($details->page !== ''
? '&page=' . htmlspecialchars(urlencode($details->page)) : '') .
'">' . $details->title . '</a>';
}
function ouwiki_convert_content($content, $subwiki, $cm, $internallinks = null,
$xhtmlformat = FORMAT_HTML) {
// Detect links. Note that changes to this code ought to be reflected
// in the code in ouwiki_save_new_version which analyses to search for
// links.
// When displayed on one page
global $ouwiki_internallinks, $ouwiki_wikilinks;
// Ordinary [[links]]
if ($internallinks) {
$ouwiki_internallinks = $internallinks;
$function = 'ouwiki_internal_re_internallinks';
} else {
$ouwiki_wikilinks = (object) array('subwiki' => $subwiki, 'cm' => $cm);
$function = 'ouwiki_internal_re_wikilinks';
}
$content = preg_replace_callback(OUWIKI_LINKS_SQUAREBRACKETS, $function, $content);
// We do not use FORMAT_MOODLE (which adds linebreaks etc) because that was
// already handled manually.
$options = ouwiki_format_text_options();
$options->para = false;
$addwrapperdivs = true;
if (strpos($content, '<div class="ouwiki_content">') !== false) {
// Stop adding text wrapper divs when already in data.
$addwrapperdivs = false;
}
$toreturn = format_text($content, $xhtmlformat, $options);
if ($addwrapperdivs) {
$toreturn = html_writer::tag('div', $toreturn, array('class' => 'ouwiki_content'));
}
return $toreturn;
}
/**
* Return default common options for {@link format_text()} when preparing
* a content to be displayed on an ouwiki page
*
* We set the option in format_text to allow ids through because otherwise
* annotations break. (This requires Moodle 2.0.3.)
*
* @return stdClass
*/
function ouwiki_format_text_options() {
$options = new stdClass();
$options->trusted = true;
$options->allowid = true;
return $options;
}
/**
* Displays a user's name and link to profile etc.
* @param object $user User object (must have at least id, firstname and lastname)
* @param int $courseid ID of course
* @param bool $link If true, makes it a link
*/
function ouwiki_display_user($user, $courseid, $link = true) {
// Wiki pages can be created by the system which obviously doesn't
// need a profile link.
if (!$user->id) {
return get_string('system', 'ouwiki');
}
$fullname = fullname($user);
$extra = '';
if (!$link) {
$extra = 'class="ouwiki_noshow"';
}
$userurl = new moodle_url('/user/view.php', array('id' => $user->id, 'course' => $courseid));
$result = '<a href="'.$userurl.'" '.$extra.'>'.fullname($user).'</a>';
return $result;
}
function ouwiki_print_tabs($selected, $pagename, $subwiki, $cm, $context, $pageexists = true,
$pagelocked = null) {
global $CFG;