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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/>.
/**
* This file contains all necessary code to view a wiki page
*
* @package mod-wiki-2.0
* @copyrigth 2009 Marc Alier, Jordi Piguillem marc.alier@upc.edu
* @copyrigth 2009 Universitat Politecnica de Catalunya http://www.upc.edu
*
* @author Jordi Piguillem
* @author Marc Alier
* @author David Jimenez
* @author Josep Arus
* @author Kenneth Riba
*
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once('../../config.php');
require_once($CFG->dirroot . '/mod/wiki/lib.php');
require_once($CFG->dirroot . '/mod/wiki/locallib.php');
require_once($CFG->dirroot . '/mod/wiki/pagelib.php');
$id = optional_param('id', 0, PARAM_INT); // Course Module ID
$pageid = optional_param('pageid', 0, PARAM_INT); // Page ID
$wid = optional_param('wid', 0, PARAM_INT); // Wiki ID
$title = optional_param('title', '', PARAM_TEXT); // Page Title
$currentgroup = optional_param('group', 0, PARAM_INT); // Group ID
$userid = optional_param('uid', 0, PARAM_INT); // User ID
$groupanduser = optional_param('groupanduser', 0, PARAM_TEXT);
$edit = optional_param('edit', -1, PARAM_BOOL);
$action = optional_param('action', '', PARAM_ALPHA);
$swid = optional_param('swid', 0, PARAM_INT); // Subwiki ID
/*
* Case 0:
*
* User that comes from a course. First wiki page must be shown
*
* URL params: id -> course module id
*
*/
if ($id) {
// Cheacking course module instance
if (!$cm = get_coursemodule_from_id('wiki', $id)) {
print_error('invalidcoursemodule');
}
// Checking course instance
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
require_login($course, true, $cm);
// Checking wiki instance
if (!$wiki = wiki_get_wiki($cm->instance)) {
print_error('incorrectwikiid', 'wiki');
}
$PAGE->set_cm($cm);
// Getting the subwiki corresponding to that wiki, group and user.
//
// Also setting the page if it exists or getting the first page title form
// that wiki
// Getting current group id
$currentgroup = groups_get_activity_group($cm);
// Getting current user id
if ($wiki->wikimode == 'individual') {
$userid = $USER->id;
} else {
$userid = 0;
}
// Getting subwiki. If it does not exists, redirecting to create page
if (!$subwiki = wiki_get_subwiki_by_group($wiki->id, $currentgroup, $userid)) {
$params = array('wid' => $wiki->id, 'group' => $currentgroup, 'uid' => $userid, 'title' => $wiki->firstpagetitle);
$url = new moodle_url('/mod/wiki/create.php', $params);
redirect($url);
}
// Getting first page. If it does not exists, redirecting to create page
if (!$page = wiki_get_first_page($subwiki->id, $wiki)) {
$params = array('swid'=>$subwiki->id, 'title'=>$wiki->firstpagetitle);
$url = new moodle_url('/mod/wiki/create.php', $params);
redirect($url);
}
/*
* Case 1:
*
* A user wants to see a page.
*
* URL Params: pageid -> page id
*
*/
} elseif ($pageid) {
// Checking page instance
if (!$page = wiki_get_page($pageid)) {
print_error('incorrectpageid', 'wiki');
}
// Checking subwiki
if (!$subwiki = wiki_get_subwiki($page->subwikiid)) {
print_error('incorrectsubwikiid', 'wiki');
}
// Checking wiki instance of that subwiki
if (!$wiki = wiki_get_wiki($subwiki->wikiid)) {
print_error('incorrectwikiid', 'wiki');
}
// Checking course module instance
if (!$cm = get_coursemodule_from_instance("wiki", $subwiki->wikiid)) {
print_error('invalidcoursemodule');
}
$currentgroup = $subwiki->groupid;
// Checking course instance
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
require_login($course, true, $cm);
/*
* Case 2:
*
* Trying to read a page from another group or user
*
* Page can exists or not.
* * If it exists, page must be shown
* * If it does not exists, system must ask for its creation
*
* URL params: wid -> subwiki id (required)
* title -> a page title (required)
* group -> group id (optional)
* uid -> user id (optional)
* groupanduser -> (optional)
*/
} elseif ($wid && $title) {
// Setting wiki instance
if (!$wiki = wiki_get_wiki($wid)) {
print_error('incorrectwikiid', 'wiki');
}
// Checking course module
if (!$cm = get_coursemodule_from_instance("wiki", $wiki->id)) {
print_error('invalidcoursemodule');
}
// Checking course instance
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
require_login($course, true, $cm);
$groupmode = groups_get_activity_groupmode($cm);
if ($wiki->wikimode == 'individual' && ($groupmode == SEPARATEGROUPS || $groupmode == VISIBLEGROUPS)) {
list($gid, $uid) = explode('-', $groupanduser);
} else if ($wiki->wikimode == 'individual') {
$gid = 0;
$uid = $userid;
} else if ($groupmode == NOGROUPS) {
$gid = 0;
$uid = 0;
} else {
$gid = $currentgroup;
$uid = 0;
}
// Getting subwiki instance. If it does not exists, redirect to create page
if (!$subwiki = wiki_get_subwiki_by_group($wiki->id, $gid, $uid)) {
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
$modeanduser = $wiki->wikimode == 'individual' && $uid != $USER->id;
$modeandgroupmember = $wiki->wikimode == 'collaborative' && !groups_is_member($gid);
$manage = has_capability('mod/wiki:managewiki', $context);
$edit = has_capability('mod/wiki:editpage', $context);
$manageandedit = $manage && $edit;
if ($groupmode == VISIBLEGROUPS and ($modeanduser || $modeandgroupmember) and !$manageandedit) {
print_error('nocontent','wiki');
}
$params = array('wid' => $wiki->id, 'group' => $gid, 'uid' => $uid, 'title' => $title);
$url = new moodle_url('/mod/wiki/create.php', $params);
redirect($url);
}
// Checking is there is a page with this title. If it does not exists, redirect to first page
if (!$page = wiki_get_page_by_title($subwiki->id, $title)) {
$params = array('wid' => $wiki->id, 'group' => $gid, 'uid' => $uid, 'title' => $wiki->firstpagetitle);
// Check to see if the first page has been created
if (!wiki_get_page_by_title($subwiki->id, $wiki->firstpagetitle)) {
$url = new moodle_url('/mod/wiki/create.php', $params);
} else {
$url = new moodle_url('/mod/wiki/view.php', $params);
}
redirect($url);
}
// /*
// * Case 3:
// *
// * A user switches group when is 'reading' a non-existent page.
// *
// * URL Params: wid -> wiki id
// * title -> page title
// * currentgroup -> group id
// *
// */
//} elseif ($wid && $title && $currentgroup) {
//
// // Checking wiki instance
// if (!$wiki = wiki_get_wiki($wid)) {
// print_error('incorrectwikiid', 'wiki');
// }
//
// // Checking subwiki instance
// // @TODO: Fix call to wiki_get_subwiki_by_group
// if (!$currentgroup = groups_get_activity_group($cm)){
// $currentgroup = 0;
// }
// if (!$subwiki = wiki_get_subwiki_by_group($wid, $currentgroup)) {
// print_error('incorrectsubwikiid', 'wiki');
// }
//
// // Checking page instance
// if ($page = wiki_get_page_by_title($subwiki->id, $title)) {
// unset($title);
// }
//
// // Checking course instance
// $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
//
// // Checking course module instance
// if (!$cm = get_coursemodule_from_instance("wiki", $wiki->id, $course->id)) {
// print_error('invalidcoursemodule');
// }
//
// $subwiki = null;
// $page = null;
//
// /*
// * Case 4:
// *
// * Error. No more options
// */
} else {
print_error('incorrectparameters');
}
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
require_capability('mod/wiki:viewpage', $context);
// Update 'viewed' state if required by completion system
require_once($CFG->libdir . '/completionlib.php');
$completion = new completion_info($course);
$completion->set_module_viewed($cm);
if (($edit != - 1) and $PAGE->user_allowed_editing()) {
$USER->editing = $edit;
}
$wikipage = new page_wiki_view($wiki, $subwiki, $cm);
/*The following piece of code is used in order
* to perform set_url correctly. It is necessary in order
* to make page_wiki_view class know that this page
* has been called via its id.
*/
if ($id) {
$wikipage->set_coursemodule($id);
}
$wikipage->set_gid($currentgroup);
$wikipage->set_page($page);
if($pageid) {
add_to_log($course->id, 'wiki', 'view', "view.php?pageid=".$pageid, $pageid, $cm->id);
} else if($id) {
add_to_log($course->id, 'wiki', 'view', "view.php?id=".$id, $id, $cm->id);
} else if($wid && $title) {
add_to_log($course->id, 'wiki', 'view', "view.php?wid=".$wid."&title=".$title, $wid, $cm->id);
}
$wikipage->print_header();
$wikipage->print_content();
$wikipage->print_footer();
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