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)) {
  37                         $enabled_feeds = array();
  38                 } else {
  39                         $enabled_feeds = $this->filter_unknown_feeds($enabled_feeds);
  40                 }
  41                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  42
  43                 if (count($enabled_feeds) > 0) {
  44                         print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
  45
  46                         print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
  47                         foreach ($enabled_feeds as $f) {
  48                                 print "<li>" .
  49                                         "<img src='images/pub_set.png'
  50                                                 style='vertical-align : middle'> <a href='#'
  51                                                 onclick='editFeed($f)'>".
  52                                         getFeedTitle($f) . "</a></li>";
  53                         }
  54                         print "</ul>";
  55                 }
  56
  57                 print "</div>";
  58         }
  59
  60         function hook_prefs_edit_feed($feed_id) {
  61                 print "<div class=\"dlgSec\">".__("Readability")."</div>";
  62                 print "<div class=\"dlgSecCont\">";
  63
  64                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  65                 if (!array($enabled_feeds)) $enabled_feeds = array();
  66
  67                 $key = array_search($feed_id, $enabled_feeds);
  68                 $checked = $key !== FALSE ? "checked" : "";
  69
  70                 print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"af_readability_enabled\"
  71                         name=\"af_readability_enabled\"
  72                         $checked>&nbsp;<label for=\"af_readability_enabled\">".__('Inline article content')."</label>";
  73
  74                 print "</div>";
  75         }
  76
  77         function hook_prefs_save_feed($feed_id) {
  78                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  79                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  80
  81                 $enable = checkbox_to_sql_bool($_POST["af_readability_enabled"]) == 'true';
  82                 $key = array_search($feed_id, $enabled_feeds);
  83
  84                 if ($enable) {
  85                         if ($key === FALSE) {
  86                                 array_push($enabled_feeds, $feed_id);
  87                         }
  88                 } else {
  89                         if ($key !== FALSE) {
  90                                 unset($enabled_feeds[$key]);
  91                         }
  92                 }
  93
  94                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  95         }
  96
  97         function hook_article_filter_action($article, $action) {
  98                 return $this->process_article($article);
  99         }
 100
 101         function process_article($article) {
 102
 103                 if (!class_exists("Readability")) require_once(dirname(dirname(__DIR__)). "/lib/readability/Readability.php");
 104
 105                 if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
 106
 107                         $ch = curl_init($article["link"]);
 108
 109                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 110                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 111                         curl_setopt($ch, CURLOPT_HEADER, true);
 112                         curl_setopt($ch, CURLOPT_NOBODY, true);
 113                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 114                         curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
 115
 116                         @$result = curl_exec($ch);
 117                         $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 118
 119                         if (strpos($content_type, "text/html") === FALSE)
 120                                 return $article;
 121                 }
 122
 123                 $tmp = fetch_file_contents($article["link"]);
 124
 125                 if ($tmp && mb_strlen($tmp) < 65535 * 4) {
 126                         $tmpdoc = new DOMDocument("1.0", "UTF-8");
 127
 128                         if (!$tmpdoc->loadHTML($tmp))
 129                                 return $article;
 130
 131                         if (strtolower($tmpdoc->encoding) != 'utf-8') {
 132                                 $tmpxpath = new DOMXPath($tmpdoc);
 133
 134                                 foreach ($tmpxpath->query("//meta") as $elem) {
 135                                         $elem->parentNode->removeChild($elem);
 136                                 }
 137
 138                                 $tmp = $tmpdoc->saveHTML();
 139                         }
 140
 141                         $r = new Readability($tmp, $article["link"]);
 142
 143                         if ($r->init()) {
 144
 145                                 $tmpxpath = new DOMXPath($r->dom);
 146
 147                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 148
 149                                 foreach ($entries as $entry) {
 150                                         if ($entry->hasAttribute("href")) {
 151                                                 $entry->setAttribute("href",
 152                                                         rewrite_relative_url($article["link"], $entry->getAttribute("href")));
 153
 154                                         }
 155
 156                                         if ($entry->hasAttribute("src")) {
 157                                                 $entry->setAttribute("src",
 158                                                         rewrite_relative_url($article["link"], $entry->getAttribute("src")));
 159
 160                                         }
 161
 162                                 }
 163
 164                                 $article["content"] = $r->articleContent->innerHTML;
 165                         }
 166                 }
 167
 168                 return $article;
 169         }
 170
 171         function hook_article_filter($article) {
 172
 173                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 174                 $key = array_search($article["feed"]["id"], $enabled_feeds);
 175                 if ($key === FALSE) return $article;
 176
 177                 return $this->process_article($article);
 178
 179         }
 180
 181         function api_version() {
 182                 return 2;
 183         }
 184
 185         private function filter_unknown_feeds($enabled_feeds) {
 186                 $tmp = array();
 187
 188                 if (!empty($enabled_feeds)) {
 189                         foreach ($enabled_feeds as $feed) {
 190
 191                                 $result = db_query("SELECT id FROM ttrss_feeds WHERE id = '$feed' AND owner_uid = " . $_SESSION["uid"]);
 192
 193                                 if (db_num_rows($result) != 0) {
 194                                         array_push($tmp, $feed);
 195                                 }
 196                         }
 197                 }
 198
 199                 return $tmp;
 200         }
 201
 202 }
 203 ?>