Merge branch 'MDL-36197_master' of git://github.com/lazydaisy/moodle
[moodle.git] / portfolio / add.php
CommitLineData
67a87e7d 1<?php
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2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
16
4c7a4ef9 17/**
4c7a4ef9 18 * This file is the main controller to do with the portfolio export wizard.
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19 *
20 * @package core_portfolio
21 * @copyright 2008 Penny Leach <penny@catalyst.net.nz>,
22 * Martin Dougiamas <http://dougiamas.com>
23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL
4c7a4ef9 24 */
67a87e7d 25require_once(dirname(dirname(__FILE__)) . '/config.php');
a239f01e 26
90658eef 27if (empty($CFG->enableportfolios)) {
a239f01e 28 print_error('disabled', 'portfolio');
29}
30
67a87e7d 31require_once($CFG->libdir . '/portfoliolib.php');
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32require_once($CFG->libdir . '/portfolio/exporter.php');
33require_once($CFG->libdir . '/portfolio/caller.php');
34require_once($CFG->libdir . '/portfolio/plugin.php');
50128512 35
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36$dataid = optional_param('id', 0, PARAM_INT); // id of partially completed export. corresponds to a record in portfolio_tempdata
37$type = optional_param('type', null, PARAM_SAFEDIR); // if we're returning from an external system (postcontrol) for a single-export only plugin
4c7a4ef9 38$cancel = optional_param('cancel', 0, PARAM_RAW); // user has cancelled the request
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39$cancelsure = optional_param('cancelsure', 0, PARAM_BOOL); // make sure they confirm first
40$logreturn = optional_param('logreturn', 0, PARAM_BOOL); // when cancelling, we can also come from the log page, rather than the caller
4c7a4ef9 41$instanceid = optional_param('instance', 0, PARAM_INT); // instanceof of configured portfolio plugin
42$courseid = optional_param('course', 0, PARAM_INT); // courseid the data being exported belongs to (caller object should provide this later)
43$stage = optional_param('stage', PORTFOLIO_STAGE_CONFIG, PARAM_INT); // stage of the export we're at (stored in the exporter)
44$postcontrol = optional_param('postcontrol', 0, PARAM_INT); // when returning from some bounce to an external system, this gets passed
45$callbackfile = optional_param('callbackfile', null, PARAM_PATH); // callback file eg /mod/forum/lib.php - the location of the exporting content
46$callbackclass = optional_param('callbackclass', null, PARAM_ALPHAEXT); // callback class eg forum_portfolio_caller - the class to handle the exporting content.
59dd457e 47$callerformats = optional_param('callerformats', null, PARAM_TAGLIST); // comma separated list of formats the specific place exporting content supports
50128512 48
4c7a4ef9 49require_login(); // this is selectively called again with $course later when we know for sure which one we're in.
3fad0df6 50$PAGE->set_context(get_system_context());
c95a6095 51$PAGE->set_url('/portfolio/add.php', array('id' => $dataid, 'sesskey' => sesskey()));
f84a4349 52$PAGE->set_pagelayout('standard');
67a87e7d 53$exporter = null;
84a44985 54
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55if ($postcontrol && $type && !$dataid) {
56 // we're returning from an external system that can't construct dynamic return urls
57 // this is a special "one export of this type only per session" case
58 if (portfolio_static_function($type, 'allows_multiple_exports')) {
59 throw new portfolio_exception('multiplesingleresume', 'portfolio');
67a87e7d 60 }
c95a6095 61
b12fbe8e 62 if (!$dataid = portfolio_export_type_to_id($type, $USER->id)) {
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63 throw new portfolio_exception('invalidtempid', 'portfolio');
64 }
65} else {
66 // we can't do this in the above case, because we're redirecting straight back from an external system
67 // this is not really ideal, but since we're in a "staged" wizard, the session key is checked in other stages.
68 require_sesskey(); // pretty much everything in this page is a write that could be hijacked, so just do this at the top here
84a44985 69}
9f3ef223 70
4c7a4ef9 71// if we have a dataid, it means we're in the middle of an export,
72// so rewaken it and continue.
73if (!empty($dataid)) {
50128512 74 try {
75 $exporter = portfolio_exporter::rewaken_object($dataid);
76 } catch (portfolio_exception $e) {
9f3ef223 77 // this can happen in some cases, a cancel request is sent when something is already broken
78 // so process it elegantly and move on.
50128512 79 if ($cancel) {
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80 if ($logreturn) {
81 redirect($CFG->wwwroot . '/user/portfoliologs.php');
82 }
50128512 83 redirect($CFG->wwwroot);
84 } else {
c95a6095 85 throw $e;
50128512 86 }
87 }
4c7a4ef9 88 // we have to wake it up first before we can cancel it
89 // so temporary directories etc get cleaned up.
50128512 90 if ($cancel) {
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91 if ($cancelsure) {
92 $exporter->cancel_request($logreturn);
93 } else {
34b9d4d4 94 portfolio_export_pagesetup($PAGE, $exporter->get('caller'));
11fbe3fc 95 $exporter->print_header(get_string('confirmcancel', 'portfolio'));
c95a6095 96 echo $OUTPUT->box_start();
67aec442 97 $yesbutton = new single_button(new moodle_url('/portfolio/add.php', array('id' => $dataid, 'cancel' => 1, 'cancelsure' => 1, 'logreturn' => $logreturn)), get_string('yes'));
59dd457e 98 if ($logreturn) {
834ad953 99 $nobutton = new single_button(new moodle_url('/user/portfoliologs.php'), get_string('no'));
3ba60ee1 100 } else {
a6855934 101 $nobutton = new single_button(new moodle_url('/portfolio/add.php', array('id' => $dataid)), get_string('no'));
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102 }
103 echo $OUTPUT->confirm(get_string('confirmcancel', 'portfolio'), $yesbutton, $nobutton);
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104 echo $OUTPUT->box_end();
105 echo $OUTPUT->footer();
106 exit;
107 }
67a87e7d 108 }
c95a6095 109 // verify we still belong to the correct user and permissions are still ok
50128512 110 $exporter->verify_rewaken();
4c7a4ef9 111 // if we don't have an instanceid in the exporter
112 // it means we've just posted from the 'choose portfolio instance' page
113 // so process that and start up the portfolio plugin
6fdd8fa7 114 if (!$exporter->get('instance')) {
4c7a4ef9 115 if ($instanceid) {
34035201 116 try {
4c7a4ef9 117 $instance = portfolio_instance($instanceid);
34035201 118 } catch (portfolio_exception $e) {
119 portfolio_export_rethrow_exception($exporter, $e);
6fdd8fa7 120 }
4c7a4ef9 121 // this technically shouldn't happen but make sure anyway
6fdd8fa7 122 if ($broken = portfolio_instance_sanity_check($instance)) {
9f3ef223 123 throw new portfolio_export_exception($exporter, $broken[$instance->get('id')], 'portfolio_' . $instance->get('plugin'));
6fdd8fa7 124 }
4c7a4ef9 125 // now we're all set up, ready to go
6fdd8fa7 126 $instance->set('user', $USER);
127 $exporter->set('instance', $instance);
d67bfc32 128 $exporter->save();
6fdd8fa7 129 }
130 }
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131
132 portfolio_export_pagesetup($PAGE, $exporter->get('caller')); // this calls require_login($course) if it can..
133
4c7a4ef9 134// completely new request, look to see what information we've been passed and set up the exporter object.
67a87e7d 135} else {
4c7a4ef9 136 // you cannot get here with no information for us, we must at least have the caller.
c737eed8 137 if (empty($_GET) && empty($_POST)) {
138 portfolio_exporter::print_expired_export();
139 }
67a87e7d 140 // we'e just posted here for the first time and have might the instance already
4c7a4ef9 141 if ($instanceid) {
9f3ef223 142 // this can throw exceptions but there's no point catching and rethrowing here
143 // as the exporter isn't created yet.
4c7a4ef9 144 $instance = portfolio_instance($instanceid);
67a87e7d 145 if ($broken = portfolio_instance_sanity_check($instance)) {
34035201 146 throw new portfolio_exception($broken[$instance->get('id')], 'portfolio_' . $instance->get('plugin'));
67a87e7d 147 }
148 $instance->set('user', $USER);
149 } else {
150 $instance = null;
151 }
152
4c7a4ef9 153 // we must be passed this from the caller, we cannot start a new export
154 // without knowing information about what part of moodle we come from.
c737eed8 155 if (empty($callbackfile) || empty($callbackclass)) {
59dd457e 156 debugging('no callback file or class');
c737eed8 157 portfolio_exporter::print_expired_export();
158 }
67a87e7d 159
4c7a4ef9 160 // so each place in moodle can pass callback args here
161 // process the entire request looking for ca_*
162 // be as lenient as possible while still being secure
163 // so only accept certain parameter types.
67a87e7d 164 $callbackargs = array();
9eb0a772 165 foreach (array_keys(array_merge($_GET, $_POST)) as $key) {
67a87e7d 166 if (strpos($key, 'ca_') === 0) {
167 if (!$value = optional_param($key, false, PARAM_ALPHAEXT)) {
61cca0b7 168 if (!$value = optional_param($key, false, PARAM_FLOAT)) {
67a87e7d 169 $value = optional_param($key, false, PARAM_PATH);
170 }
171 }
4c7a4ef9 172 // strip off ca_ for niceness
67a87e7d 173 $callbackargs[substr($key, 3)] = $value;
174 }
175 }
4c7a4ef9 176 // righto, now we have the callback args set up
177 // load up the caller file and class and tell it to set up all the data
178 // it needs
67a87e7d 179 require_once($CFG->dirroot . $callbackfile);
766d61cb 180 if (!class_exists($callbackclass) || !is_subclass_of($callbackclass, 'portfolio_caller_base')) {
181 throw new portfolio_caller_exception('callbackclassinvalid', 'portfolio');
182 }
67a87e7d 183 $caller = new $callbackclass($callbackargs);
4dc67f1e 184 $caller->set('user', $USER);
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185 if ($formats = explode(',', $callerformats)) {
186 $caller->set_formats_from_button($formats);
187 }
0d06b6fd 188 $caller->load_data();
4c7a4ef9 189 // this must check capabilities and either throw an exception or return false.
67a87e7d 190 if (!$caller->check_permissions()) {
9f3ef223 191 throw new portfolio_caller_exception('nopermissions', 'portfolio', $caller->get_return_url());
67a87e7d 192 }
67a87e7d 193
f1d2641d 194 portfolio_export_pagesetup($PAGE, $caller); // this calls require_login($course) if it can..
67a87e7d 195
de6d81e6 196 // finally! set up the exporter object with the portfolio instance, and caller information elements
197 $exporter = new portfolio_exporter($instance, $caller, $callbackfile);
4c7a4ef9 198
199 // set the export-specific variables, and save.
67a87e7d 200 $exporter->set('user', $USER);
84a44985 201 $exporter->save();
67a87e7d 202}
203
67a87e7d 204if (!$exporter->get('instance')) {
205 // we've just arrived but have no instance
4c7a4ef9 206 // in this case the exporter object and the caller object have been set up above
207 // so just make a little form to select the portfolio plugin instance,
208 // which is the last thing to do before starting the export.
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209 //
210 // first check to make sure there is actually a point
211 $options = portfolio_instance_select(
212 portfolio_instances(),
213 $exporter->get('caller')->supported_formats(),
214 get_class($exporter->get('caller')),
521a6ab0 215 $exporter->get('caller')->get_mimetype(),
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216 'instance',
217 true,
218 true
219 );
220 if (empty($options)) {
221 throw new portfolio_export_exception($exporter, 'noavailableplugins', 'portfolio');
222 } else if (count($options) == 1) {
223 // no point displaying a form, just redirect.
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224 $optionskeys = array_keys($options);
225 $instance = array_shift($optionskeys);
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226 redirect($CFG->wwwroot . '/portfolio/add.php?id= ' . $exporter->get('id') . '&instance=' . $instance . '&sesskey=' . sesskey());
227 }
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228 // be very selective about not including this unless we really need to
229 require_once($CFG->libdir . '/portfolio/forms.php');
59dd457e 230 $mform = new portfolio_instance_select('', array('id' => $exporter->get('id'), 'caller' => $exporter->get('caller'), 'options' => $options));
6fdd8fa7 231 if ($mform->is_cancelled()) {
84a44985 232 $exporter->cancel_request();
6fdd8fa7 233 } else if ($fromform = $mform->get_data()){
84a44985 234 redirect($CFG->wwwroot . '/portfolio/add.php?instance=' . $fromform->instance . '&amp;id=' . $exporter->get('id'));
6fdd8fa7 235 exit;
236 }
237 else {
11fbe3fc 238 $exporter->print_header(get_string('selectplugin', 'portfolio'));
de2bd9df 239 echo $OUTPUT->box_start();
6fdd8fa7 240 $mform->display();
de2bd9df 241 echo $OUTPUT->box_end();
e6e565ab 242 echo $OUTPUT->footer();
6fdd8fa7 243 exit;
67a87e7d 244 }
67a87e7d 245}
246
4c7a4ef9 247// if we haven't been passed &stage= grab it from the exporter.
248if (!$stage) {
ac6a5492 249 $stage = $exporter->get('stage');
250}
251
d67bfc32 252// for places returning control to pass (rather than PORTFOLIO_STAGE_PACKAGE
253// which is unstable if they can't get to the constant (eg external system)
4c7a4ef9 254$alreadystolen = false;
255if ($postcontrol) { // the magic request variable plugins must pass on returning here
34035201 256 try {
4c7a4ef9 257 // allow it to read whatever gets sent back in the request
258 // this is useful for plugins that redirect away and back again
259 // adding a token to the end of the url, for example box.net
34035201 260 $exporter->instance()->post_control($stage, array_merge($_GET, $_POST));
261 } catch (portfolio_plugin_exception $e) {
262 portfolio_export_rethrow_exception($exporter, $e);
263 }
4c7a4ef9 264 $alreadystolen = true; // remember this so we don't get caught in a steal control loop!
d67bfc32 265}
ac6a5492 266
9f3ef223 267// actually do the work now..
67a87e7d 268$exporter->process_stage($stage, $alreadystolen);
269
4317f92f 270