plugins/af_readability/init.php

   1 <?php
   2 use andreskrey\Readability\Readability;
   3 use andreskrey\Readability\Configuration;
   4
   5 class Af_Readability extends Plugin {
   6
   7         /* @var PluginHost $host */
   8         private $host;
   9
  10         function about() {
  11                 return array(1.0,
  12                         "Try to inline article content using Readability",
  13                         "fox");
  14         }
  15
  16         function flags() {
  17                 return array("needs_curl" => true);
  18         }
  19
  20         function save() {
  21                 $enable_share_anything = checkbox_to_sql_bool($_POST["enable_share_anything"]);
  22
  23                 $this->host->set($this, "enable_share_anything", $enable_share_anything);
  24
  25                 echo __("Data saved.");
  26         }
  27
  28         function init($host)
  29         {
  30                 $this->host = $host;
  31
  32                 if (version_compare(PHP_VERSION, '5.6.0', '<')) {
  33                         return;
  34                 }
  35
  36                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  37                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  38                 $host->add_hook($host::HOOK_PREFS_EDIT_FEED, $this);
  39                 $host->add_hook($host::HOOK_PREFS_SAVE_FEED, $this);
  40
  41                 $host->add_filter_action($this, "action_inline", __("Inline content"));
  42         }
  43
  44         function hook_prefs_tab($args) {
  45                 if ($args != "prefFeeds") return;
  46
  47                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Readability settings (af_readability)')."\">";
  48
  49                 if (version_compare(PHP_VERSION, '5.6.0', '<')) {
  50                         print_error("This plugin requires PHP version 5.6.");
  51                 }
  52
  53                 print_notice("Enable the plugin for specific feeds in the feed editor.");
  54
  55                 print "<form dojoType=\"dijit.form.Form\">";
  56
  57                 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
  58                         evt.preventDefault();
  59                         if (this.validate()) {
  60                                 console.log(dojo.objectToQuery(this.getValues()));
  61                                 new Ajax.Request('backend.php', {
  62                                         parameters: dojo.objectToQuery(this.getValues()),
  63                                         onComplete: function(transport) {
  64                                                 notify_info(transport.responseText);
  65                                         }
  66                                 });
  67                                 //this.reset();
  68                         }
  69                         </script>";
  70
  71                 print_hidden("op", "pluginhandler");
  72                 print_hidden("method", "save");
  73                 print_hidden("plugin", "af_readability");
  74
  75                 $enable_share_anything = $this->host->get($this, "enable_share_anything");
  76
  77                 print_checkbox("enable_share_anything", $enable_share_anything);
  78                 print "&nbsp;<label for=\"enable_share_anything\">" . __("Use Readability for pages shared via bookmarklet.") . "</label>";
  79
  80                 print "<p>"; print_button("submit", __("Save"));
  81                 print "</form>";
  82
  83                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
  84                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
  85
  86                 $enabled_feeds = $this->filter_unknown_feeds($enabled_feeds);
  87                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
  88
  89                 if (count($enabled_feeds) > 0) {
  90                         print "<h3>" . __("Currently enabled for (click to edit):") . "</h3>";
  91
  92                         print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
  93                         foreach ($enabled_feeds as $f) {
  94                                 print "<li>" .
  95                                         "<img src='images/pub_set.png'
  96                                                 style='vertical-align : middle'> <a href='#'
  97                                                 onclick='editFeed($f)'>".
  98                                         Feeds::getFeedTitle($f) . "</a></li>";
  99                         }
 100                         print "</ul>";
 101                 }
 102
 103                 print "</div>";
 104         }
 105
 106         function hook_prefs_edit_feed($feed_id) {
 107                 print "<div class=\"dlgSec\">".__("Readability")."</div>";
 108                 print "<div class=\"dlgSecCont\">";
 109
 110                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 111                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
 112
 113                 $key = array_search($feed_id, $enabled_feeds);
 114                 $checked = $key !== FALSE ? "checked" : "";
 115
 116                 print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"af_readability_enabled\"
 117                         name=\"af_readability_enabled\"
 118                         $checked>&nbsp;<label for=\"af_readability_enabled\">".__('Inline article content')."</label>";
 119
 120                 print "</div>";
 121         }
 122
 123         function hook_prefs_save_feed($feed_id) {
 124                 $enabled_feeds = $this->host->get($this, "enabled_feeds");
 125                 if (!is_array($enabled_feeds)) $enabled_feeds = array();
 126
 127                 $enable = checkbox_to_sql_bool($_POST["af_readability_enabled"]);
 128                 $key = array_search($feed_id, $enabled_feeds);
 129
 130                 if ($enable) {
 131                         if ($key === FALSE) {
 132                                 array_push($enabled_feeds, $feed_id);
 133                         }
 134                 } else {
 135                         if ($key !== FALSE) {
 136                                 unset($enabled_feeds[$key]);
 137                         }
 138                 }
 139
 140                 $this->host->set($this, "enabled_feeds", $enabled_feeds);
 141         }
 142
 143         /**
 144          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
 145          */
 146         function hook_article_filter_action($article, $action) {
 147                 return $this->process_article($article);
 148         }
 149
 150         public function extract_content($url) {
 151                 global $fetch_effective_url;
 152
 153                 $tmp = fetch_file_contents([
 154                         "url" => $url,
 155                         "http_accept" => "text/*",
 156                         "type" => "text/html"]);
 157
 158                 if ($tmp && mb_strlen($tmp) < 1024 * 500) {
 159                         $tmpdoc = new DOMDocument("1.0", "UTF-8");
 160
 161                         if (!$tmpdoc->loadHTML('<?xml encoding="utf-8" ?>\n' . $tmp))
 162                                 return false;
 163
 164                         if (strtolower($tmpdoc->encoding) != 'utf-8') {
 165                                 $tmpxpath = new DOMXPath($tmpdoc);
 166
 167                                 foreach ($tmpxpath->query("//meta") as $elem) {
 168                                         $elem->parentNode->removeChild($elem);
 169                                 }
 170
 171                                 $tmp = $tmpdoc->saveHTML();
 172                         }
 173
 174                         $r = new Readability(new Configuration());
 175
 176                         try {
 177                                 if ($r->parse($tmp)) {
 178
 179                                         $tmpxpath = new DOMXPath($r->getDOMDOcument());
 180                                         $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
 181
 182                                         foreach ($entries as $entry) {
 183                                                 if ($entry->hasAttribute("href")) {
 184                                                         $entry->setAttribute("href",
 185                                                                         rewrite_relative_url($fetch_effective_url, $entry->getAttribute("href")));
 186
 187                                                 }
 188
 189                                                 if ($entry->hasAttribute("src")) {
 190                                                         $entry->setAttribute("src",
 191                                                                         rewrite_relative_url($fetch_effective_url, $entry->getAttribute("src")));
 192
 193                                                 }
 194                                         }
 195
 196                                         return $r->getContent();
 197                                 }
 198
 199                         } catch (ParseException $e) {
 200                                 return false;
 201                         }
 202
 203                 }
 204
 205                 return false;
 206         }
 207
 208         function process_article($article) {
 209
 210                 $extracted_content = $this->extract_content($article["link"]);
 211
 212                 # let's see if there's anything of value in there
 213                 $content_test = trim(strip_tags(sanitize($extracted_content)));
 214
 215                 if ($content_test) {
 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                         $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ? AND owner_uid = ?");
 244                         $sth->execute([$feed, $_SESSION['uid']]);
 245
 246                         if ($row = $sth->fetch()) {
 247                                 array_push($tmp, $feed);
 248                         }
 249                 }
 250
 251                 return $tmp;
 252         }
 253
 254 }