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