plugins/af_readability/init.php

   1 <?php
   2 class Af_Readability extends Plugin {
   3
   4         /* @var PluginHost $host */
   5         private $host;
   6
   7         function about() {
   8                 return array(1.0,
   9                         "Try to inline article content using Readability",
  10                         "fox");
  11         }
  12
  13         function flags() {
  14                 return array("needs_curl" => true);
  15         }
  16
  17         function save() {
  18                 $enable_share_anything = checkbox_to_sql_bool($_POST["enable_share_anything"]);
  19
  20                 $this->host->set($this, "enable_share_anything", $enable_share_anything);
  21
  22                 echo __("Data saved.");
  23         }
  24
  25         function init($host)
  26         {
  27                 $this->host = $host;
  28
  29                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  30                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  31                 $host->add_hook($host::HOOK_PREFS_EDIT_FEED, $this);
  32                 $host->add_hook($host::HOOK_PREFS_SAVE_FEED, $this);
  33
  34                 $host->add_filter_action($this, "action_inline", __("Inline content"));
  35         }
  36
  37         function hook_prefs_tab($args) {
  38                 if ($args != "prefFeeds") return;
  39
  40                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Readability settings (af_readability)')."\">";
  41
  42                 print_notice("Enable the plugin for specific feeds in the feed editor.");
  43
  44                 print "<form dojoType=\"dijit.form.Form\">";
  45
  46                 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
  47                         evt.preventDefault();
  48                         if (this.validate()) {
  49                                 console.log(dojo.objectToQuery(this.getValues()));
  50                                 new Ajax.Request('backend.php', {
  51                                         parameters: dojo.objectToQuery(this.getValues()),
  52                                         onComplete: function(transport) {
  53                                                 notify_info(transport.responseText);
  54                                         }
  55                                 });
  56                                 //this.reset();
  57                         }
  58                         </script>";
  59
  60                 print_hidden("op", "pluginhandler");
  61                 print_hidden("method", "save");
  62                 print_hidden("plugin", "af_readability");
  63
  64                 $enable_share_anything = $this->host->get($this, "enable_share_anything");
  65
  66                 print_checkbox("enable_share_anything", $enable_share_anything);
  67                 print "&nbsp;<label for=\"enable_share_anything\">" . __("Use Readability for pages shared via bookmarklet.") . "</label>";
  68
  69                 print "<p>"; print_button("submit", __("Save"));
  70                 print "</form>";
  71
  72                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  73                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  74
  75                 $enabled_feeds = $this->filter_unknown_feeds($enabled_feeds);
  76                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  77
  78                 if (count($enabled_feeds) > 0) {
  79                         print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
  80
  81                         print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
  82                         foreach ($enabled_feeds as $f) {
  83                                 print "<li>" .
  84                                         "<img src='images/pub_set.png'
  85                                                 style='vertical-align : middle'> <a href='#'
  86                                                 onclick='editFeed($f)'>".
  87                                         Feeds::getFeedTitle($f) . "</a></li>";
  88                         }
  89                         print "</ul>";
  90                 }
  91
  92                 print "</div>";
  93         }
  94
  95         function hook_prefs_edit_feed($feed_id) {
  96                 print "<div class=\"dlgSec\">".__("Readability")."</div>";
  97                 print "<div class=\"dlgSecCont\">";
  98
  99                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 100                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
 101
 102                 $key = array_search($feed_id, $enabled_feeds);
 103                 $checked = $key !== FALSE ? "checked" : "";
 104
 105                 print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"af_readability_enabled\"
 106                         name=\"af_readability_enabled\"
 107                         $checked>&nbsp;<label for=\"af_readability_enabled\">".__('Inline article content')."</label>";
 108
 109                 print "</div>";
 110         }
 111
 112         function hook_prefs_save_feed($feed_id) {
 113                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 114                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
 115
 116                 $enable = checkbox_to_sql_bool($_POST["af_readability_enabled"]);
 117                 $key = array_search($feed_id, $enabled_feeds);
 118
 119                 if ($enable) {
 120                         if ($key === FALSE) {
 121                                 array_push($enabled_feeds, $feed_id);
 122                         }
 123                 } else {
 124                         if ($key !== FALSE) {
 125                                 unset($enabled_feeds[$key]);
 126                         }
 127                 }
 128
 129                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
 130         }
 131
 132         /**
 133          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
 134          */
 135         function hook_article_filter_action($article, $action) {
 136                 return $this->process_article($article);
 137         }
 138
 139         public function extract_content($url) {
 140                 if (!class_exists("Readability")) require_once(dirname(dirname(__DIR__)). "/lib/readability/Readability.php");
 141
 142                 if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
 143
 144                         $ch = curl_init($url);
 145
 146                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 147                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 148                         curl_setopt($ch, CURLOPT_HEADER, true);
 149                         curl_setopt($ch, CURLOPT_NOBODY, true);
 150                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 151                         curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
 152
 153                         @curl_exec($ch);
 154                         $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 155
 156                         if (strpos($content_type, "text/html") === FALSE)
 157                                 return false;
 158
 159                         $effective_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
 160                 }
 161
 162                 $tmp = fetch_file_contents($url);
 163
 164                 if ($tmp && mb_strlen($tmp) < 1024 * 500) {
 165                         $tmpdoc = new DOMDocument("1.0", "UTF-8");
 166
 167                         if (!$tmpdoc->loadHTML('<?xml encoding="utf-8" ?>\n' . $tmp))
 168                                 return false;
 169
 170                         if (!isset($effective_url))
 171                                 $effective_url = $url;
 172
 173                         if (strtolower($tmpdoc->encoding) != 'utf-8') {
 174                                 $tmpxpath = new DOMXPath($tmpdoc);
 175
 176                                 foreach ($tmpxpath->query("//meta") as $elem) {
 177                                         $elem->parentNode->removeChild($elem);
 178                                 }
 179
 180                                 $tmp = $tmpdoc->saveHTML();
 181                         }
 182
 183                         $r = new Readability($tmp, $url);
 184
 185                         if ($r->init()) {
 186                                 $tmpxpath = new DOMXPath($r->dom);
 187
 188                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 189
 190                                 foreach ($entries as $entry) {
 191                                         if ($entry->hasAttribute("href")) {
 192                                                 $entry->setAttribute("href",
 193                                                                 rewrite_relative_url($effective_url, $entry->getAttribute("href")));
 194
 195                                         }
 196
 197                                         if ($entry->hasAttribute("src")) {
 198                                                 $entry->setAttribute("src",
 199                                                                 rewrite_relative_url($effective_url, $entry->getAttribute("src")));
 200
 201                                         }
 202
 203                                 }
 204
 205                                 return $r->articleContent->innerHTML;
 206                         }
 207                 }
 208
 209                 return false;
 210         }
 211
 212         function process_article($article) {
 213
 214                 $extracted_content = $this->extract_content($article["link"]);
 215
 216                 if ($extracted_content) {
 217                         $article["content"] = $extracted_content;
 218                 }
 219
 220                 return $article;
 221         }
 222
 223         function hook_article_filter($article) {
 224
 225                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 226                 if (!is_array($enabled_feeds)) return $article;
 227
 228                 $key = array_search($article["feed"]["id"], $enabled_feeds);
 229                 if ($key === FALSE) return $article;
 230
 231                 return $this->process_article($article);
 232
 233         }
 234
 235         function api_version() {
 236                 return 2;
 237         }
 238
 239         private function filter_unknown_feeds($enabled_feeds) {
 240                 $tmp = array();
 241
 242                 foreach ($enabled_feeds as $feed) {
 243
 244                         $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ? AND owner_uid = ?");
 245                         $sth->execute([$feed, $_SESSION['uid']]);
 246
 247                         if ($row = $sth->fetch()) {
 248                                 array_push($tmp, $feed);
 249                         }
 250                 }
 251
 252                 return $tmp;
 253         }
 254
 255 }