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