plugins/af_readability/init.php

   1 <?php
   2 class Af_Readability extends Plugin {
   3
   4         private $host;
   5
   6         function about() {
   7                 return array(1.0,
   8                         "Try to inline article content using Readability",
   9                         "fox");
  10         }
  11
  12         function flags() {
  13                 return array("needs_curl" => true);
  14         }
  15
  16         function save() {
  17                 //
  18         }
  19
  20         function init($host)
  21         {
  22                 $this->host = $host;
  23
  24                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  25                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  26                 $host->add_hook($host::HOOK_PREFS_EDIT_FEED, $this);
  27                 $host->add_hook($host::HOOK_PREFS_SAVE_FEED, $this);
  28
  29                 $host->add_filter_action($this, "action_inline", __("Inline content"));
  30         }
  31
  32         function hook_prefs_tab($args) {
  33                 if ($args != "prefFeeds") return;
  34
  35                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('af_readability settings')."\">";
  36
  37                 print_notice("Enable the plugin for specific feeds in the feed editor.");
  38
  39                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  40                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  41
  42                 $enabled_feeds = $this->filter_unknown_feeds($enabled_feeds);
  43                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  44
  45                 if (count($enabled_feeds) > 0) {
  46                         print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
  47
  48                         print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
  49                         foreach ($enabled_feeds as $f) {
  50                                 print "<li>" .
  51                                         "<img src='images/pub_set.png'
  52                                                 style='vertical-align : middle'> <a href='#'
  53                                                 onclick='editFeed($f)'>".
  54                                         getFeedTitle($f) . "</a></li>";
  55                         }
  56                         print "</ul>";
  57                 }
  58
  59                 print "</div>";
  60         }
  61
  62         function hook_prefs_edit_feed($feed_id) {
  63                 print "<div class=\"dlgSec\">".__("Readability")."</div>";
  64                 print "<div class=\"dlgSecCont\">";
  65
  66                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  67                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  68
  69                 $key = array_search($feed_id, $enabled_feeds);
  70                 $checked = $key !== FALSE ? "checked" : "";
  71
  72                 print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"af_readability_enabled\"
  73                         name=\"af_readability_enabled\"
  74                         $checked>&nbsp;<label for=\"af_readability_enabled\">".__('Inline article content')."</label>";
  75
  76                 print "</div>";
  77         }
  78
  79         function hook_prefs_save_feed($feed_id) {
  80                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  81                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  82
  83                 $enable = checkbox_to_sql_bool($_POST["af_readability_enabled"]) == 'true';
  84                 $key = array_search($feed_id, $enabled_feeds);
  85
  86                 if ($enable) {
  87                         if ($key === FALSE) {
  88                                 array_push($enabled_feeds, $feed_id);
  89                         }
  90                 } else {
  91                         if ($key !== FALSE) {
  92                                 unset($enabled_feeds[$key]);
  93                         }
  94                 }
  95
  96                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  97         }
  98
  99         function hook_article_filter_action($article, $action) {
 100                 return $this->process_article($article);
 101         }
 102
 103         function process_article($article) {
 104
 105                 if (!class_exists("Readability")) require_once(dirname(dirname(__DIR__)). "/lib/readability/Readability.php");
 106
 107                 if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
 108
 109                         $ch = curl_init($article["link"]);
 110
 111                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 112                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 113                         curl_setopt($ch, CURLOPT_HEADER, true);
 114                         curl_setopt($ch, CURLOPT_NOBODY, true);
 115                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 116                         curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
 117
 118                         @$result = curl_exec($ch);
 119                         $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
 120
 121                         if (strpos($content_type, "text/html") === FALSE)
 122                                 return $article;
 123                 }
 124
 125                 $tmp = fetch_file_contents($article["link"]);
 126
 127                 if ($tmp && mb_strlen($tmp) < 65535 * 4) {
 128                         $tmpdoc = new DOMDocument("1.0", "UTF-8");
 129
 130                         if (!$tmpdoc->loadHTML($tmp))
 131                                 return $article;
 132
 133                         if (strtolower($tmpdoc->encoding) != 'utf-8') {
 134                                 $tmpxpath = new DOMXPath($tmpdoc);
 135
 136                                 foreach ($tmpxpath->query("//meta") as $elem) {
 137                                         $elem->parentNode->removeChild($elem);
 138                                 }
 139
 140                                 $tmp = $tmpdoc->saveHTML();
 141                         }
 142
 143                         $r = new Readability($tmp, $article["link"]);
 144
 145                         if ($r->init()) {
 146
 147                                 $tmpxpath = new DOMXPath($r->dom);
 148
 149                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 150
 151                                 foreach ($entries as $entry) {
 152                                         if ($entry->hasAttribute("href")) {
 153                                                 $entry->setAttribute("href",
 154                                                         rewrite_relative_url($article["link"], $entry->getAttribute("href")));
 155
 156                                         }
 157
 158                                         if ($entry->hasAttribute("src")) {
 159                                                 $entry->setAttribute("src",
 160                                                         rewrite_relative_url($article["link"], $entry->getAttribute("src")));
 161
 162                                         }
 163
 164                                 }
 165
 166                                 $article["content"] = $r->articleContent->innerHTML;
 167                         }
 168                 }
 169
 170                 return $article;
 171         }
 172
 173         function hook_article_filter($article) {
 174
 175                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 176                 if (!is_array($enabled_feeds)) return $article;
 177
 178                 $key = array_search($article["feed"]["id"], $enabled_feeds);
 179                 if ($key === FALSE) return $article;
 180
 181                 return $this->process_article($article);
 182
 183         }
 184
 185         function api_version() {
 186                 return 2;
 187         }
 188
 189         private function filter_unknown_feeds($enabled_feeds) {
 190                 $tmp = array();
 191
 192                 foreach ($enabled_feeds as $feed) {
 193
 194                         $result = db_query("SELECT id FROM ttrss_feeds WHERE id = '$feed' AND owner_uid = " . $_SESSION["uid"]);
 195
 196                         if (db_num_rows($result) != 0) {
 197                                 array_push($tmp, $feed);
 198                         }
 199                 }
 200
 201                 return $tmp;
 202         }
 203
 204 }
 205 ?>