2 // This file is part of Moodle - http://moodle.org/
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.
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.
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/>.
18 * This plugin is used to access flickr pictures
21 * @package repository_flickr_public
22 * @copyright 2010 Dongsheng Cai {@link http://dongsheng.org}
23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 require_once($CFG->dirroot . '/repository/lib.php');
26 require_once($CFG->libdir.'/flickrlib.php');
27 require_once(__DIR__ . '/image.php');
30 * repository_flickr_public class
31 * This one is used to create public repository
32 * You can set up a public account in admin page, so everyone can access
33 * flickr photos from this plugin
36 * @package repository_flickr_public
37 * @copyright 2009 Dongsheng Cai {@link http://dongsheng.org}
38 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
40 class repository_flickr_public extends repository {
45 * Stores sizes of images to prevent multiple API call
47 static private $sizes = array();
53 * @global object $SESSION
54 * @param int $repositoryid
56 * @param array $options
57 * @param boolean $readonly
59 public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array(), $readonly=0) {
60 global $CFG, $SESSION;
61 parent::__construct($repositoryid, $context, $options,$readonly);
62 $this->api_key = $this->get_option('api_key');
63 $this->flickr = new phpFlickr($this->api_key);
64 $this->flickr_account = $this->get_option('email_address');
65 $this->usewatermarks = $this->get_option('usewatermarks');
67 $account = optional_param('flickr_account', '', PARAM_RAW);
68 $fulltext = optional_param('flickr_fulltext', '', PARAM_RAW);
69 if (empty($fulltext)) {
70 $fulltext = optional_param('s', '', PARAM_RAW);
72 $tag = optional_param('flickr_tag', '', PARAM_RAW);
73 $license = optional_param('flickr_license', '', PARAM_RAW);
75 $this->sess_account = 'flickr_public_'.$this->id.'_account';
76 $this->sess_tag = 'flickr_public_'.$this->id.'_tag';
77 $this->sess_text = 'flickr_public_'.$this->id.'_text';
79 if (!empty($account) or !empty($fulltext) or !empty($tag) or !empty($license)) {
80 $SESSION->{$this->sess_tag} = $tag;
81 $SESSION->{$this->sess_text} = $fulltext;
82 $SESSION->{$this->sess_account} = $account;
87 * save api_key in config table
88 * @param array $options
91 public function set_option($options = array()) {
92 if (!empty($options['api_key'])) {
93 set_config('api_key', trim($options['api_key']), 'flickr_public');
95 unset($options['api_key']);
96 return parent::set_option($options);
100 * get api_key from config table
102 * @param string $config
105 public function get_option($config = '') {
106 if ($config==='api_key') {
107 return trim(get_config('flickr_public', 'api_key'));
109 $options['api_key'] = trim(get_config('flickr_public', 'api_key'));
111 return parent::get_option($config);
115 * is global_search available?
119 public function global_search() {
120 if (empty($this->flickr_account)) {
128 * check if flickr account
131 public function check_login() {
132 return !empty($this->flickr_account);
136 * construct login form
138 * @param boolean $ajax
141 public function print_login() {
142 if ($this->options['ajax']) {
144 $fulltext = new stdClass();
145 $fulltext->label = get_string('fulltext', 'repository_flickr_public').': ';
146 $fulltext->id = 'el_fulltext';
147 $fulltext->type = 'text';
148 $fulltext->name = 'flickr_fulltext';
150 $tag = new stdClass();
151 $tag->label = get_string('tag', 'repository_flickr_public').': ';
154 $tag->name = 'flickr_tag';
156 $email_field = new stdClass();
157 $email_field->label = get_string('username', 'repository_flickr_public').': ';
158 $email_field->id = 'account';
159 $email_field->type = 'text';
160 $email_field->name = 'flickr_account';
162 $commercial = new stdClass();
163 $commercial->label = get_string('commercialuse', 'repository_flickr_public').': ';
164 $commercial->id = 'flickr_commercial_id';
165 $commercial->type = 'checkbox';
166 $commercial->name = 'flickr_commercial';
167 $commercial->value = 'yes';
169 $modification = new stdClass();
170 $modification->label = get_string('modification', 'repository_flickr_public').': ';
171 $modification->id = 'flickr_modification_id';
172 $modification->type = 'checkbox';
173 $modification->name = 'flickr_modification';
174 $modification->value = 'yes';
176 $ret['login'] = array($fulltext, $tag, $email_field, $commercial, $modification);
177 $ret['login_btn_label'] = get_string('search');
178 $ret['login_btn_action'] = 'search';
182 echo '<tr><td><label>'.get_string('fulltext', 'repository_flickr_public').'</label></td>';
183 echo '<td><input type="text" name="flickr_fulltext" /></td></tr>';
184 echo '<tr><td><label>'.get_string('tag', 'repository_flickr_public').'</label></td>';
185 echo '<td><input type="text" name="flickr_tag" /></td></tr>';
186 echo '<tr><td><label>'.get_string('username', 'repository_flickr_public').'</label></td>';
187 echo '<td><input type="text" name="flickr_account" /></td></tr>';
189 echo '<tr><td><label>'.get_string('commercialuse', 'repository_flickr_public').'</label></td>';
191 echo '<input type="checkbox" name="flickr_commercial" value="yes" />';
194 echo '<tr><td><label>'.get_string('modification', 'repository_flickr_public').'</label></td>';
196 echo '<input type="checkbox" name="flickr_modification" value="yes" />';
201 echo '<input type="hidden" name="action" value="search" />';
202 echo '<input type="submit" value="'.get_string('search', 'repository').'" />';
211 public function logout() {
213 unset($SESSION->{$this->sess_tag});
214 unset($SESSION->{$this->sess_text});
215 unset($SESSION->{$this->sess_account});
216 return $this->print_login();
219 public function license4moodle ($license_id) {
221 '0' => 'allrightsreserved',
230 return $license[$license_id];
234 * search images on flickr
236 * @param string $search_text
239 public function search($search_text, $page = 0) {
246 if (!empty($this->flickr_account)) {
247 $people = $this->flickr->people_findByEmail($this->flickr_account);
248 $this->nsid = $people['nsid'];
250 if (!empty($SESSION->{$this->sess_account})) {
251 $people = $this->flickr->people_findByEmail($SESSION->{$this->sess_account});
252 $this->nsid = $people['nsid'];
254 if (empty($this->nsid)) {
256 // user specify a flickr account, but it is not valid
257 if (!empty($this->flickr_account) or !empty($SESSION->{$this->sess_account})) {
258 $ret['e'] = get_string('invalidemail', 'repository_flickr_public');
263 // including all licenses by default
264 $licenses = array(1=>1, 2, 3, 4, 5, 6, 7);
266 $commercial = optional_param('flickr_commercial', '', PARAM_RAW);
267 $modification = optional_param('flickr_modification', '', PARAM_RAW);
269 if ($commercial == 'yes') {
271 // 4: Attribution License
272 // 5: Attribution ShareAlike
273 // 6: Attribution NoDerives
274 // 7: unknown license
275 unset($licenses[1], $licenses[2], $licenses[3]);
277 if ($modification == 'yes') {
279 // 1: Attribution NonCommercial ShareAlike
280 // 2: Attribution NonCommercial
281 // 4: Attribution License
282 // 5: Attribution ShareAlike
283 // 7: unknown license
284 unset($licenses[3], $licenses[6]);
286 //if ($modification == 'sharealike') {
288 // 1: Attribution NonCommercial ShareAlike
289 // 5: Attribution ShareAlike
290 //unset($licenses[2], $licenses[3], $licenses[4], $licenses[6], $licenses[7]);
293 $licenses = implode(',', $licenses);
295 $tag = !empty($SESSION->{$this->sess_tag}) ? $SESSION->{$this->sess_tag} : null;
296 $text = !empty($SESSION->{$this->sess_text}) ? $SESSION->{$this->sess_text} : null;
297 $nsid = !empty($this->nsid) ? $this->nsid : null;
299 $photos = $this->flickr->photos_search(
305 'license' => $licenses,
310 $ret['total'] = $photos['total'];
311 $ret['perpage'] = $photos['perpage'];
312 if (empty($photos)) {
313 $ret['list'] = array();
316 $ret = $this->build_list($photos, $page, $ret);
317 $ret['list'] = array_filter($ret['list'], array($this, 'filter'));
322 * return an image list
324 * @param string $path
328 public function get_listing($path = '', $page = 1) {
329 $people = $this->flickr->people_findByEmail($this->flickr_account);
330 $this->nsid = $people['nsid'];
331 $photos = $this->flickr->people_getPublicPhotos($people['nsid'], 'original_format', 24, $page);
334 return $this->build_list($photos, $page, $ret);
338 * build an image list
340 * @param array $photos
344 private function build_list($photos, $page = 1, &$ret) {
347 if (!empty($this->nsid)) {
348 $photos_url = $this->flickr->urls_getUserPhotos($this->nsid);
349 $ret['manage'] = $photos_url;
351 $ret['list'] = array();
352 $ret['nosearch'] = true;
353 $ret['norefresh'] = true;
354 $ret['logouttext'] = get_string('backtosearch', 'repository_flickr_public');
355 $ret['pages'] = $photos['pages'];
356 if (is_int($page) && $page <= $ret['pages']) {
357 $ret['page'] = $page;
361 if (!empty($photos['photo'])) {
362 foreach ($photos['photo'] as $p) {
363 if(empty($p['title'])) {
364 $p['title'] = get_string('notitle', 'repository_flickr');
366 if (isset($p['originalformat'])) {
367 $format = $p['originalformat'];
371 $format = '.'.$format;
372 if (substr($p['title'], strlen($p['title'])-strlen($format)) != $format) {
374 // $p['title'] .= '-'.$p['owner'];
375 // append file extension
376 $p['title'] .= $format;
378 // Get the thumbnail source URL.
379 $thumbnailsource = $this->flickr->buildPhotoURL($p, 'Square');
380 if (!@getimagesize($thumbnailsource)) {
381 // Use the file extension icon as a thumbnail if the original thumbnail does not exist to avoid
382 // displaying broken thumbnails in the repository.
383 $thumbnailsource = $OUTPUT->image_url(file_extension_icon($p['title'], 90))->out(false);
385 $ret['list'][] = array(
386 'title' => $p['title'],
387 'source' => $p['id'],
389 'thumbnail' => $thumbnailsource,
392 'url' => 'http://www.flickr.com/photos/' . $p['owner'] . '/' . $p['id'],
393 'haslicense' => true,
402 * Print a search form
406 public function print_search() {
408 $str .= '<input type="hidden" name="repo_id" value="'.$this->id.'" />';
409 $str .= '<input type="hidden" name="ctx_id" value="'.$this->context->id.'" />';
410 $str .= '<input type="hidden" name="seekey" value="'.sesskey().'" />';
411 $str .= '<label>'.get_string('fulltext', 'repository_flickr_public').'</label><br/><input name="s" value="" /><br/>';
412 $str .= '<label>'.get_string('tag', 'repository_flickr_public').'</label><br /><input type="text" name="flickr_tag" /><br />';
417 * Return photo url by given photo id
418 * @param string $photoid
421 private function build_photo_url($photoid) {
422 $bestsize = $this->get_best_size($photoid);
423 if (!isset($bestsize['source'])) {
424 throw new repository_exception('cannotdownload', 'repository');
426 return $bestsize['source'];
430 * Returns the best size for a photo
432 * @param string $photoid the photo identifier
433 * @return array of information provided by the API
435 protected function get_best_size($photoid) {
436 if (!isset(self::$sizes[$photoid])) {
437 // Sizes are returned from smallest to greatest.
438 self::$sizes[$photoid] = $this->flickr->photos_getSizes($photoid);
440 $sizes = self::$sizes[$photoid];
442 if (is_array($sizes)) {
443 while ($bestsize = array_pop($sizes)) {
444 // Make sure the source is set. Exit the loop if found.
445 if (isset($bestsize['source'])) {
453 public function get_link($photoid) {
454 return $this->build_photo_url($photoid);
459 * @global object $CFG
460 * @param string $photoid
461 * @param string $file
464 public function get_file($photoid, $file = '') {
467 $info = $this->flickr->photos_getInfo($photoid);
469 // If we can read the original secret, it means that we have access to the original picture.
470 if (isset($info['originalsecret'])) {
471 $source = $this->flickr->buildPhotoURL($info, 'original');
473 $source = $this->build_photo_url($photoid);
475 // Make sure the source image exists.
476 if (!@getimagesize($source)) {
477 throw new moodle_exception('cannotdownload', 'repository');
480 if ($info['owner']['realname']) {
481 $author = $info['owner']['realname'];
483 $author = $info['owner']['username'];
485 $copyright = get_string('author', 'repository') . ': ' . $author;
487 $result = parent::get_file($source, $file);
488 $path = $result['path'];
490 if (!empty($this->usewatermarks)) {
491 $img = new moodle_image($path);
492 $img->watermark($copyright, array(10,10), array('ttf'=>true, 'fontsize'=>12))->saveas($path);
495 return array('path'=>$path, 'author'=>$info['owner']['realname'], 'license'=>$this->license4moodle($info['license']));
499 * Add Instance settings input to Moodle form
500 * @param object $mform
502 public static function instance_config_form($mform) {
503 $mform->addElement('text', 'email_address', get_string('emailaddress', 'repository_flickr_public'));
504 $mform->setType('email_address', PARAM_RAW_TRIMMED); // This is for sending to flickr. Not our job to validate it.
505 $mform->addElement('checkbox', 'usewatermarks', get_string('watermark', 'repository_flickr_public'));
506 $mform->setDefault('usewatermarks', 0);
510 * Names of the instance settings
513 public static function get_instance_option_names() {
514 return array('email_address', 'usewatermarks');
518 * Add Plugin settings input to Moodle form
519 * @param object $mform
521 public static function type_config_form($mform, $classname = 'repository') {
522 $api_key = get_config('flickr_public', 'api_key');
523 if (empty($api_key)) {
526 $strrequired = get_string('required');
528 $mform->addElement('text', 'api_key', get_string('apikey', 'repository_flickr_public'), array('value'=>$api_key,'size' => '40'));
529 $mform->setType('api_key', PARAM_RAW_TRIMMED);
530 $mform->addRule('api_key', $strrequired, 'required', null, 'client');
532 $mform->addElement('static', null, '', get_string('information','repository_flickr_public'));
536 * Names of the plugin settings
539 public static function get_type_option_names() {
540 return array('api_key', 'pluginname');
544 * is run when moodle administrator add the plugin
546 public static function plugin_init() {
547 //here we create a default instance for this type
549 $id = repository::static_function('flickr_public','create', 'flickr_public', 0, context_system::instance(), array('name'=>'', 'email_address' => null, 'usewatermarks' => false), 0);
556 public function supported_filetypes() {
557 return array('web_image');
559 public function supported_returntypes() {
560 return (FILE_INTERNAL | FILE_EXTERNAL);
564 * Return the source information
566 * @param string $photoid photo id
567 * @return string|null
569 public function get_file_source_info($photoid) {
570 return $this->build_photo_url($photoid);
574 * Is this repository accessing private data?
578 public function contains_private_data() {