mirrored from git://git.moodle.org/moodle.git
-
Notifications
You must be signed in to change notification settings - Fork 6.4k
/
contentbank.php
337 lines (308 loc) · 13.3 KB
/
contentbank.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
<?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/>.
/**
* Content bank class
*
* @package core_contentbank
* @copyright 2020 Amaia Anabitarte <amaia@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core_contentbank;
use core_plugin_manager;
use stored_file;
use context;
/**
* Content bank class
*
* @package core_contentbank
* @copyright 2020 Amaia Anabitarte <amaia@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class contentbank {
/** @var array Enabled content types. */
private $enabledcontenttypes = null;
/**
* Obtains the list of core_contentbank_content objects currently active.
*
* The list does not include players which are disabled.
*
* @return string[] Array of contentbank contenttypes.
*/
public function get_enabled_content_types(): array {
if (!is_null($this->enabledcontenttypes)) {
return $this->enabledcontenttypes;
}
$enabledtypes = \core\plugininfo\contenttype::get_enabled_plugins();
$types = [];
foreach ($enabledtypes as $name) {
$contenttypeclassname = "\\contenttype_$name\\contenttype";
$contentclassname = "\\contenttype_$name\\content";
if (class_exists($contenttypeclassname) && class_exists($contentclassname)) {
$types[$contenttypeclassname] = $name;
}
}
return $this->enabledcontenttypes = $types;
}
/**
* Obtains an array of supported extensions by active plugins.
*
* @return array The array with all the extensions supported and the supporting plugin names.
*/
public function load_all_supported_extensions(): array {
$extensionscache = \cache::make('core', 'contentbank_enabled_extensions');
$supportedextensions = $extensionscache->get('enabled_extensions');
if ($supportedextensions === false) {
// Load all enabled extensions.
$supportedextensions = [];
foreach ($this->get_enabled_content_types() as $type) {
$classname = "\\contenttype_$type\\contenttype";
$contenttype = new $classname;
if ($contenttype->is_feature_supported($contenttype::CAN_UPLOAD)) {
$extensions = $contenttype->get_manageable_extensions();
foreach ($extensions as $extension) {
if (array_key_exists($extension, $supportedextensions)) {
$supportedextensions[$extension][] = $type;
} else {
$supportedextensions[$extension] = [$type];
}
}
}
}
$extensionscache->set('enabled_extensions', $supportedextensions);
}
return $supportedextensions;
}
/**
* Obtains an array of supported extensions in the given context.
*
* @param context $context Optional context to check (default null)
* @return array The array with all the extensions supported and the supporting plugin names.
*/
public function load_context_supported_extensions(context $context = null): array {
$extensionscache = \cache::make('core', 'contentbank_context_extensions');
$contextextensions = $extensionscache->get($context->id);
if ($contextextensions === false) {
$contextextensions = [];
$supportedextensions = $this->load_all_supported_extensions();
foreach ($supportedextensions as $extension => $types) {
foreach ($types as $type) {
$classname = "\\contenttype_$type\\contenttype";
$contenttype = new $classname($context);
if ($contenttype->can_upload()) {
$contextextensions[$extension] = $type;
break;
}
}
}
$extensionscache->set($context->id, $contextextensions);
}
return $contextextensions;
}
/**
* Obtains a string with all supported extensions by active plugins.
* Mainly to use as filepicker options parameter.
*
* @param context $context Optional context to check (default null)
* @return string A string with all the extensions supported.
*/
public function get_supported_extensions_as_string(context $context = null) {
$supported = $this->load_context_supported_extensions($context);
$extensions = array_keys($supported);
return implode(',', $extensions);
}
/**
* Returns the file extension for a file.
*
* @param string $filename The name of the file
* @return string The extension of the file
*/
public function get_extension(string $filename) {
$dot = strrpos($filename, '.');
if ($dot === false) {
return '';
}
return strtolower(substr($filename, $dot));
}
/**
* Get the first content bank plugin supports a file extension.
*
* @param string $extension Content file extension
* @param context $context $context Optional context to check (default null)
* @return string contenttype name supports the file extension or null if the extension is not supported by any allowed plugin.
*/
public function get_extension_supporter(string $extension, context $context = null): ?string {
$supporters = $this->load_context_supported_extensions($context);
if (array_key_exists($extension, $supporters)) {
return $supporters[$extension];
}
return null;
}
/**
* Find the contents with %$search% in the contextid defined.
* If contextid and search are empty, all contents are returned.
* In all the cases, only the contents for the enabled contentbank-type plugins are returned.
* No content-type permissions are validated here. It is the caller responsability to check that the user can access to them.
* The only validation done here is, for each content, a call to the method $content->is_view_allowed().
*
* @param string|null $search Optional string to search (for now it will search only into the name).
* @param int $contextid Optional contextid to search.
* @param array $contenttypenames Optional array with the list of content-type names to search.
* @return array The contents for the enabled contentbank-type plugins having $search as name and placed in $contextid.
*/
public function search_contents(?string $search = null, ?int $contextid = 0, ?array $contenttypenames = null): array {
global $DB;
$contents = [];
// Get only contents for enabled content-type plugins.
$contenttypes = [];
$enabledcontenttypes = $this->get_enabled_content_types();
foreach ($enabledcontenttypes as $contenttypename) {
if (empty($contenttypenames) || in_array($contenttypename, $contenttypenames)) {
$contenttypes[] = "contenttype_$contenttypename";
}
}
if (empty($contenttypes)) {
// Early return if there are no content-type plugins enabled.
return $contents;
}
list($sqlcontenttypes, $params) = $DB->get_in_or_equal($contenttypes, SQL_PARAMS_NAMED);
$sql = " contenttype $sqlcontenttypes ";
// Filter contents on this context (if defined).
if (!empty($contextid)) {
$params['contextid'] = $contextid;
$sql .= ' AND contextid = :contextid ';
}
// Search for contents having this string (if defined).
if (!empty($search)) {
$sql .= ' AND ' . $DB->sql_like('name', ':name', false, false);
$params['name'] = '%' . $DB->sql_like_escape($search) . '%';
}
$records = $DB->get_records_select('contentbank_content', $sql, $params, 'name ASC');
foreach ($records as $record) {
$contentclass = "\\$record->contenttype\\content";
$content = new $contentclass($record);
if ($content->is_view_allowed()) {
$contents[] = $content;
}
}
return $contents;
}
/**
* Create content from a file information.
*
* @throws file_exception If file operations fail
* @throws dml_exception if the content creation fails
* @param \context $context Context where to upload the file and content.
* @param int $userid Id of the user uploading the file.
* @param stored_file $file The file to get information from
* @return content
*/
public function create_content_from_file(\context $context, int $userid, stored_file $file): ?content {
global $USER;
if (empty($userid)) {
$userid = $USER->id;
}
// Get the contenttype to manage given file's extension.
$filename = $file->get_filename();
$extension = $this->get_extension($filename);
$plugin = $this->get_extension_supporter($extension, $context);
$classname = '\\contenttype_'.$plugin.'\\contenttype';
$record = new \stdClass();
$record->name = $filename;
$record->usercreated = $userid;
$contentype = new $classname($context);
$content = $contentype->upload_content($file, $record);
$event = \core\event\contentbank_content_uploaded::create_from_record($content->get_content());
$event->trigger();
return $content;
}
/**
* Delete content bank content by context.
*
* @param context $context The context to delete content from.
* @return bool
*/
public function delete_contents(context $context): bool {
global $DB;
$result = true;
$records = $DB->get_records('contentbank_content', ['contextid' => $context->id]);
foreach ($records as $record) {
$contenttypeclass = "\\$record->contenttype\\contenttype";
if (class_exists($contenttypeclass)) {
$contenttype = new $contenttypeclass($context);
$contentclass = "\\$record->contenttype\\content";
$content = new $contentclass($record);
if (!$contenttype->delete_content($content)) {
$result = false;
}
}
}
return $result;
}
/**
* Move content bank content from a context to another.
*
* @param context $from The context to get content from.
* @param context $to The context to move content to.
* @return bool
*/
public function move_contents(context $from, context $to): bool {
global $DB;
$result = true;
$records = $DB->get_records('contentbank_content', ['contextid' => $from->id]);
foreach ($records as $record) {
$contenttypeclass = "\\$record->contenttype\\contenttype";
if (class_exists($contenttypeclass)) {
$contenttype = new $contenttypeclass($from);
$contentclass = "\\$record->contenttype\\content";
$content = new $contentclass($record);
if (!$contenttype->move_content($content, $to)) {
$result = false;
}
}
}
return $result;
}
/**
* Get the list of content types that have the requested feature.
*
* @param string $feature Feature code e.g CAN_UPLOAD.
* @param null|\context $context Optional context to check the permission to use the feature.
* @param bool $enabled Whether check only the enabled content types or all of them.
*
* @return string[] List of content types where the user has permission to access the feature.
*/
public function get_contenttypes_with_capability_feature(string $feature, \context $context = null, bool $enabled = true): array {
$contenttypes = [];
// Check enabled content types or all of them.
if ($enabled) {
$contenttypestocheck = $this->get_enabled_content_types();
} else {
$plugins = core_plugin_manager::instance()->get_plugins_of_type('contenttype');
foreach ($plugins as $plugin) {
$contenttypeclassname = "\\{$plugin->type}_{$plugin->name}\\contenttype";
$contenttypestocheck[$contenttypeclassname] = $plugin->name;
}
}
foreach ($contenttypestocheck as $classname => $name) {
$contenttype = new $classname($context);
// The method names that check the features permissions must follow the pattern can_feature.
if ($contenttype->{"can_$feature"}()) {
$contenttypes[$classname] = $name;
}
}
return $contenttypes;
}
}