plugins/af_readability/init.php

   1 <?php
   2 class Af_Readability extends Plugin {
   3
   4         private $host;
   5
   6         function about() {
   7                 return array(1.0,
   8                         "Try to inline article content using Readability",
   9                         "fox");
  10         }
  11
  12         function save() {
  13                 //
  14         }
  15
  16         function init($host)
  17         {
  18                 $this->host = $host;
  19
  20                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  21                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  22                 $host->add_hook($host::HOOK_PREFS_EDIT_FEED, $this);
  23                 $host->add_hook($host::HOOK_PREFS_SAVE_FEED, $this);
  24
  25                 $host->add_filter_action($this, "action_inline", __("Inline content"));
  26         }
  27
  28         function hook_prefs_tab($args) {
  29                 if ($args != "prefFeeds") return;
  30
  31                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('af_readability settings')."\">";
  32
  33                 print_notice("Enable the plugin for specific feeds in the feed editor.");
  34
  35                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  36                 if (!array($enabled_feeds)) $enabled_feeds = array();
  37
  38                 $enabled_feeds = $this->filter_unknown_feeds($enabled_feeds);
  39                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  40
  41                 if (count($enabled_feeds) > 0) {
  42                         print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
  43
  44                         print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
  45                         foreach ($enabled_feeds as $f) {
  46                                 print "<li>" .
  47                                         "<img src='images/pub_set.png'
  48                                                 style='vertical-align : middle'> <a href='#'
  49                                                 onclick='editFeed($f)'>".
  50                                         getFeedTitle($f) . "</a></li>";
  51                         }
  52                         print "</ul>";
  53                 }
  54
  55                 print "</div>";
  56         }
  57
  58         function hook_prefs_edit_feed($feed_id) {
  59                 print "<div class=\"dlgSec\">".__("Readability")."</div>";
  60                 print "<div class=\"dlgSecCont\">";
  61
  62                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  63                 if (!array($enabled_feeds)) $enabled_feeds = array();
  64
  65                 $key = array_search($feed_id, $enabled_feeds);
  66                 $checked = $key !== FALSE ? "checked" : "";
  67
  68                 print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"af_readability_enabled\"
  69                         name=\"af_readability_enabled\"
  70                         $checked>&nbsp;<label for=\"af_readability_enabled\">".__('Inline article content')."</label>";
  71
  72                 print "</div>";
  73         }
  74
  75         function hook_prefs_save_feed($feed_id) {
  76                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  77                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  78
  79                 $enable = checkbox_to_sql_bool($_POST["af_readability_enabled"]) == 'true';
  80                 $key = array_search($feed_id, $enabled_feeds);
  81
  82                 if ($enable) {
  83                         if ($key === FALSE) {
  84                                 array_push($enabled_feeds, $feed_id);
  85                         }
  86                 } else {
  87                         if ($key !== FALSE) {
  88                                 unset($enabled_feeds[$key]);
  89                         }
  90                 }
  91
  92                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  93         }
  94
  95         function hook_article_filter_action($article, $action) {
  96                 return $this->process_article($article);
  97         }
  98
  99         function process_article($article) {
 100
 101                 if (!class_exists("Readability")) require_once(dirname(dirname(__DIR__)). "/lib/readability/Readability.php");
 102
 103                 if (function_exists("curl_init")) {
 104                         $ch = curl_init($article["link"]);
 105                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 106                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 107                         curl_setopt($ch, CURLOPT_HEADER, true);
 108                         curl_setopt($ch, CURLOPT_NOBODY, true);
 109                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir"));
 110                         curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
 111
 112                         @$result = curl_exec($ch);
 113                         $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 114
 115                         if (strpos($content_type, "text/html") === FALSE)
 116                                 return $article;
 117                 }
 118
 119                 $tmp = fetch_file_contents($article["link"]);
 120
 121                 if ($tmp && mb_strlen($tmp) < 65535 * 4) {
 122                         $tmpdoc = new DOMDocument("1.0", "UTF-8");
 123
 124                         if (!$tmpdoc->loadHTML($tmp))
 125                                 return $article;
 126
 127                         if (strtolower($tmpdoc->encoding) != 'utf-8') {
 128                                 $tmpxpath = new DOMXPath($tmpdoc);
 129
 130                                 foreach ($tmpxpath->query("//meta") as $elem) {
 131                                         $elem->parentNode->removeChild($elem);
 132                                 }
 133
 134                                 $tmp = $tmpdoc->saveHTML();
 135                         }
 136
 137                         $r = new Readability($tmp, $article["link"]);
 138
 139                         if ($r->init()) {
 140
 141                                 $tmpxpath = new DOMXPath($r->dom);
 142
 143                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 144
 145                                 foreach ($entries as $entry) {
 146                                         if ($entry->hasAttribute("href")) {
 147                                                 $entry->setAttribute("href",
 148                                                         rewrite_relative_url($article["link"], $entry->getAttribute("href")));
 149
 150                                         }
 151
 152                                         if ($entry->hasAttribute("src")) {
 153                                                 $entry->setAttribute("src",
 154                                                         rewrite_relative_url($article["link"], $entry->getAttribute("src")));
 155
 156                                         }
 157
 158                                 }
 159
 160                                 $article["content"] = $r->articleContent->innerHTML;
 161                         }
 162                 }
 163
 164                 return $article;
 165         }
 166
 167         function hook_article_filter($article) {
 168
 169                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 170                 $key = array_search($article["feed"]["id"], $enabled_feeds);
 171                 if ($key === FALSE) return $article;
 172
 173                 return $this->process_article($article);
 174
 175         }
 176
 177         function api_version() {
 178                 return 2;
 179         }
 180
 181         private function filter_unknown_feeds($enabled_feeds) {
 182                 $tmp = array();
 183
 184                 foreach ($enabled_feeds as $feed) {
 185
 186                         $result = db_query("SELECT id FROM ttrss_feeds WHERE id = '$feed' AND owner_uid = " . $_SESSION["uid"]);
 187
 188                         if (db_num_rows($result) != 0) {
 189                                 array_push($tmp, $feed);
 190                         }
 191                 }
 192
 193                 return $tmp;
 194         }
 195
 196 }
 197 ?>