-
Notifications
You must be signed in to change notification settings - Fork 2
/
init.php
379 lines (306 loc) · 10.7 KB
/
init.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
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
<?php
require_once __DIR__ . '/RSSGenerator.php';
require_once __DIR__ . "/instagram.php";
use PI\Instagram\Logging;
class ff_Instagram extends Plugin {
function about() {
return array(
1.0, // version
'Generates feeds from Instagram URLs', // description
'feader', // author
false, // is_system
);
}
function api_version() {
return 2;
}
function init($host) {
$host->add_hook($host::HOOK_FETCH_FEED, $this);
$host->add_hook($host::HOOK_FEED_FETCHED, $this);
$host->add_hook($host::HOOK_SUBSCRIBE_FEED, $this);
$host->add_hook($host::HOOK_FEED_BASIC_INFO, $this);
$host->add_hook($host::HOOK_FEED_PARSED, $this);
$host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
$host->add_hook($host::HOOK_SANITIZE, $this);
$this->host = $host;
}
private $ids; # do not use this directly, use the getter/setter functions
private function init_ids() { # TODO does not work in init?
if(! $this->ids) {
$ids = $this->host->get($this, 'ids');
@$ids = json_decode($ids, true);
if(! $ids) $ids = [];
$this->ids = $ids;
}
}
private function get_id($url) {
$this->init_ids();
return $this->ids[$url];
}
private function set_id($url, $id) {
$this->init_ids();
if($id && is_numeric($id)) {
$passthru = false;
if(! isset($this->ids[$url]) || $this->ids[$url] != $id) $passthru = true;
$this->ids[$url] = $id;
if($passthru) {
Logging::debug("Setting id '$id' for '$url'");
$this->host->set($this, 'ids', json_encode($this->ids));
}
}
}
private static function check_feed_icon($icon_url, $feed_id) {
if(! $icon_url || Feeds::feedHasIcon($feed_id)) return;
$icon_file = Feeds::getIconFile($feed_id);
$contents = fetch_file_contents($icon_url);
if ($contents && mb_strlen($contents, '8bit') < 65535) {
$fp = @fopen($icon_file, "w");
if ($fp) {
fwrite($fp, $contents);
fclose($fp);
chmod($icon_file, 0644);
Logging::debug("Saving feed icon: '$icon_file' <-- '$icon_url'");
}
}
}
/*
* Takes a URL and if it determines it to be an Instagram user URL, returns
* a normalized version of it. This is useful since ttrss determines
* uniqueness of feeds by the fetch_url (and owner_id).
*
* If the function thinks its argument doesn't belong to an Instagram user,
* it returns NULL, so it's also useful to check if the plugin should hook in.
*
* hashtag or locations are not supported ATM since this would require to do
* some things differently (JSON names, RSS author required a lookup etc)
*/
private static function normalize_Insta_user_url($url) {
$path = parse_url($url, PHP_URL_PATH);
$host = parse_url($url, PHP_URL_HOST);
if(! preg_match('/^(www\.)?instagram\.com$/i', $host)) return; // see issue #1
$p_comps = array_filter(explode("/", $path, 3));
$user = strtolower(array_shift($p_comps)); // instagram is case insensitive about user names
if( ! $user || $p_comps) return;
return "https://instagram.com/$user/";
}
/*
* Takes an object representing a user page and an integer timestamp.
*
* yield arrays that can be inserted into RSSGenerator's Item class
*/
private static function generate_Iposts($user, $timestamp) {
if($user->is_private()) return; // shouldn't happen here, but whatever
$LIMIT = 5000;
foreach($user->generate_posts($timestamp > 0) as $i => $post) {
#var_dump($post);
$item = $post->format_for_rss();
$item["author"] = $user->author();
yield $item;
if($i > $LIMIT) break;
}
}
const charset_hack = '<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>';
private static function get_insta_user_metadata_html($html) {
/* This will not be called if everything goes alright, but is kept as fallback
since it should be more robust than haggling with json
*/
$doc = new DOMDocument();
@$doc->loadHTML(self::charset_hack . $html);
$xpath = new DOMXPath($doc);
$title = $xpath->evaluate('string(//meta[@property="og:title"]/@content)');
$title = preg_replace("/ photos and videos$/", '', $title);
$icon = $xpath->evaluate('string(//meta[@property="og:image"]/@content)');
return [$title, $icon, NULL];
}
function hook_subscribe_feed($contents, &$url) {
$n_url = self::normalize_Insta_user_url($url);
if(! $n_url) return $contents;
$url = $n_url;
try {
if($contents) $this->user = PI\Instagram\UserPage::from_html($contents);
else $this->user = $this->create_ig_user($url);
} catch (Exception $e) {
user_error("Error while trying to get Instagram data for '$url'");
}
if(! $this->user) {
list($this->title, $this->icon_url,) = self::get_insta_user_metadata_html($contents);
}
$feed = new RSSGenerator_Inst\Feed();
# Setting these has no purpose ATM
$feed->link = $url;
$feed->title = $this->user? $this->user->title() : $this->title;
return $feed->saveXML();
}
function hook_feed_basic_info($basic_info, $fetch_url, $owner_uid, $feed_id) {
$url = self::normalize_Insta_user_url($fetch_url);
if(! $url || $basic_info) return $basic_info;
Logging::debug("Trying to get basic feed info for '$fetch_url'");
$basic_info['site_url'] = $url;
if(! $this->user) {
try {
$this->user = $this->create_ig_user($url);
} catch(Exception $e) {}
}
# Try to get data set by earlier hook, or our call above
if($this->user) {
$title = $this->user->title();
$icon_url = $this->user->icon_url();
$this->set_id($url, $this->user->id());
} else {
if($this->title) $title = $this->title;
if($this->icon_url) $icon_url = $this->icon_url;
}
if($title) $basic_info['title'] = $title;
if($icon_url) self::check_feed_icon($icon_url, $feed_id);
Logging::debug("Found basic feed info for '$fetch_url': " . json_encode($basic_info));
return $basic_info;
}
protected function create_ig_user($url) {
$url_ = $url;
$url = self::normalize_Insta_user_url($url);
if(! $url) throw new Exception("No instagram user URL: '$url_'");
$id = $this->get_id($url);
#PI\Instagram\Loader::set_meta(); # may throw Exception
$calls = ['from_url' => [$url], 'from_deskgram' => [$url]];
if($id) $calls = array_merge(['from_id' => [$id, $url]], $calls);
foreach($calls as $func => $arg) {
try {
Logging::debug("Calling '$func'");
$user = call_user_func_array(['PI\Instagram\UserPage', $func], $arg);
if($user) break;
} catch(PI\Instagram\UserPrivateException $e) { # TODO | these
$this->set_id($url, $e->id());
throw $e;
} catch(PI\Instagram\NoPostsException $e) {
$this->set_id($url, $e->id());
throw $e;
} catch(Exception $e) {
Logging::exception_debug($e, "Got Exception");
continue;
}
}
if($user) {
$this->set_id($url, $user->id());
return $user;
} else {
if($e) throw $e;
else {
$s = "Something strange happened for '$url_'";
Logging::error($s);
throw new Exception($s);
}
}
}
function hook_fetch_feed($feed_data, $fetch_url) {
$url = self::normalize_Insta_user_url($fetch_url);
if(! $url || $feed_data) return $feed_data;
try {
$this->user = $this->create_ig_user($url);
} catch (PI\Instagram\UserPrivateException $e) {
$s = "'$url': Set to private";
Logging::debug($s);
return "<error>$s</error>\n";
} catch (PI\Instagram\NoPostsException $e) {
$s = "'$url': No Posts.";
Logging::error($s);
return "<error>$s</error>\n";
} catch (PI\Instagram\FetchException $e) {
#if($e->getCode() == 404)
return ""; // for better UI feedback
} catch (PI\Instagram\CantTellException $e) {
return ""; # TODO
} catch (Exception $e) {
return "";
}
# create feed
$feed = new RSSGenerator_Inst\Feed(['link' => $this->user->url(),
'title' => $this->user->title(), 'description' => $this->user->description()]);
return $feed->saveXML();
}
function hook_feed_fetched($feed_data, $fetch_url) {
$url = self::normalize_Insta_user_url($fetch_url);
if(! $url || ! Feeds::is_html($feed_data)) return $feed_data;
try {
$this->user = PI\Instagram\UserPage::from_html($feed_data);
} catch (PI\Instagram\UserPrivateException $e) {
$s = "'$url': Set to private";
Logging::debug($s);
return "<error>$s</error>\n";
} catch (PI\Instagram\NoPostsException $e) {
$s = "'$url': No Posts.";
Logging::error($s);
return "<error>$s</error>\n";
} catch(PI\Instagram\CantTellException $e) {
return $feed_data;
} catch (Exception $e) {
Logging::exception_error($e, "Error for '$url'");
return "<error>'$url': {$e->getMessage()}</error>\n";
}
# create feed
$feed = new RSSGenerator_Inst\Feed(['link' => $this->user->url(),
'title' => $this->user->title(), 'description' => $this->user->description()]);
return $feed->saveXML();
}
function hook_feed_parsed($rss, $feed_id) {
if ( ! self::normalize_Insta_user_url($rss->get_link()) || ! isset($this->user)) return;
// We also check here in case of deleted favicon
self::check_feed_icon($this->user->icon_url(), $feed_id);
# check latest entry in DB
# TODO use $row["last_modified"] or $row["last_unconditional"] from ttrss_feeds here?
$db = $this->host->get_pdo();
$sth = $db->prepare("SELECT max(date_entered) AS ts FROM
ttrss_entries, ttrss_user_entries WHERE
ref_id = id AND feed_id = ?");
$sth->execute([$feed_id]);
$ts = $sth->fetchColumn();
if($ts) {
Logging::debug("Found latest DB entry timestamp: '$ts'");
$ts = @strtotime($ts);
} else {
Logging::debug("No entries in DB.");
$ts = false;
}
static $ref;
static $p_xpath;
static $p_items;
if(!$ref) { #initialize reflection
$ref = new ReflectionClass('FeedParser');
$p_xpath = $ref->getProperty('xpath');
$p_xpath->setAccessible(true);
$p_items = $ref->getProperty('items');
$p_items->setAccessible(true);
}
if(count($p_items->getValue($rss))) return;
$xpath = $p_xpath->getValue($rss);
$doc = $xpath->document;
$feed = new RSSGenerator_Inst\Feed(array(), $doc);
$items = array();
foreach(self::generate_Iposts($this->user, $ts) as $ar) {
$it = $feed->new_item($ar);
$items [] = new FeedItem_RSS($it->get_item(), $doc, $xpath);
}
//var_dump($items);
$p_items->setValue($rss, $items);
}
function hook_article_filter($article) {
$link = $article["link"];
if(stripos($link, 'instagram.com/p/') === false) return $article;
try {
$article['content'] = PI\Instagram\Post::reformat_content($article['content'], $link);
} catch (PI\Instagram\ServerSideException $e) {
Logging::exception_debug($e, "'$link': Server error");
} catch (Exception $e) {
Logging::exception_error($e, "Error for '$link'");
}
return $article;
}
function hook_sanitize($doc, $site_url, $allowed_elements, $disallowed_attributes) {
if(stripos($site_url, 'instagram.com/') !== False) {
$cap = $doc->getElementsByTagName("figcaption")->item(0);
PI\Instagram\Post::sanitize_caption($cap);
}
return array($doc, $allowed_elements, $disallowed_attributes);
}
}