| 1 | <?php |
| 2 | /******************************************************************************** |
| 3 | * banana/feed.inc.php : Feed Builder |
| 4 | * ------------------------ |
| 5 | * |
| 6 | * This file is part of the banana distribution |
| 7 | * Copyright: See COPYING files that comes with this distribution |
| 8 | ********************************************************************************/ |
| 9 | |
| 10 | require_once dirname(__FILE__) . '/banana.inc.php'; |
| 11 | |
| 12 | define('BANANA_FEED_VERSION', '0.1.1'); |
| 13 | |
| 14 | class BananaFeed |
| 15 | { |
| 16 | /** Structure version |
| 17 | */ |
| 18 | private $version; |
| 19 | |
| 20 | /** Feed name |
| 21 | */ |
| 22 | public $group; |
| 23 | |
| 24 | /** Feed description |
| 25 | */ |
| 26 | public $description; |
| 27 | |
| 28 | /** A 'ordered by id' spool of the last messages |
| 29 | * Each Message is an array with : |
| 30 | * array('author' => author, 'date' => date (UNIX TS), 'title' => subject, 'body' => html body, |
| 31 | * 'link' => link, 'reply' => reply) |
| 32 | */ |
| 33 | public $messages = array(); |
| 34 | |
| 35 | /** Last update time |
| 36 | */ |
| 37 | public $lastupdate = 0; |
| 38 | |
| 39 | /** Path where the feed is stored |
| 40 | */ |
| 41 | public $path = null; |
| 42 | |
| 43 | /** Create an empty feed |
| 44 | */ |
| 45 | private function __construct() |
| 46 | { |
| 47 | $this->version = BANANA_FEED_VERSION; |
| 48 | $this->group = Banana::$group; |
| 49 | $this->description = trim(Banana::$protocole->getDescription()); |
| 50 | } |
| 51 | |
| 52 | /** Update the feed, using current settings of Banana |
| 53 | * Calling this function suppose that Banana::$spool is the spool of the current box |
| 54 | */ |
| 55 | public function update() |
| 56 | { |
| 57 | if (!Banana::$spool || Banana::$spool->group != $this->group) { |
| 58 | return false; |
| 59 | } |
| 60 | if (empty(Banana::$spool->overview)) { |
| 61 | $spool_indexes = array(); |
| 62 | } else { |
| 63 | $spool_indexes = array_keys(Banana::$spool->overview); |
| 64 | sort($spool_indexes, SORT_NUMERIC); |
| 65 | $spool_indexes = array_slice($spool_indexes, -Banana::$feed_size, Banana::$feed_size); |
| 66 | } |
| 67 | $feed_indexes = array_keys($this->messages); |
| 68 | $old = array_diff($feed_indexes, $spool_indexes); |
| 69 | foreach ($old as $key) { |
| 70 | unset($this->messages[$key]); |
| 71 | } |
| 72 | $new = array_diff($spool_indexes, $feed_indexes); |
| 73 | foreach ($new as $key) { |
| 74 | $message =& Banana::$protocole->getMessage($key); |
| 75 | if (is_null($message)) { |
| 76 | return; |
| 77 | } |
| 78 | $array = array(); |
| 79 | $array['author'] = $message->getAuthorName(); |
| 80 | $array['date'] = $message->getHeaderValue('Date'); |
| 81 | $array['title'] = $message->getHeaderValue('Subject'); |
| 82 | $array['body'] = $message->getFormattedBody(); |
| 83 | $array['link'] = Banana::$page->makeUrl(array('group' => $this->group, 'artid' => $key)); |
| 84 | if (Banana::$protocole->canSend()) { |
| 85 | $array['reply'] = Banana::$page->makeUrl(array('group' => $this->group, 'artid' => $key, 'action' => 'new')); |
| 86 | } |
| 87 | $this->messages[$key] = $array; |
| 88 | } |
| 89 | uasort($this->messages, Array('BananaFeed', 'compare')); |
| 90 | $this->lastupdate = time(); |
| 91 | $this->writeToFile(); |
| 92 | } |
| 93 | |
| 94 | /** Get the spool corresponding with the current settings of Banana |
| 95 | */ |
| 96 | static public function &getFeed() |
| 97 | { |
| 98 | $feed =& BananaFeed::readFromFile(); |
| 99 | if (!$feed) { |
| 100 | $feed = new BananaFeed(); |
| 101 | } |
| 102 | if (Banana::$feed_updateOnDemand) { |
| 103 | $feed->update(); |
| 104 | } |
| 105 | return $feed; |
| 106 | } |
| 107 | |
| 108 | /** Return the cache file name |
| 109 | */ |
| 110 | static private function filename() |
| 111 | { |
| 112 | return BananaSpool::getPath('feed'); |
| 113 | } |
| 114 | |
| 115 | /** Read a feed from a cache file |
| 116 | */ |
| 117 | static private function &readFromFile() |
| 118 | { |
| 119 | $feed = null; |
| 120 | $file = BananaFeed::filename(); |
| 121 | if (!file_exists($file)) { |
| 122 | return $feed; |
| 123 | } |
| 124 | $feed = unserialize(file_get_contents($file)); |
| 125 | if ($feed->version != BANANA_FEED_VERSION) { |
| 126 | $feed = null; |
| 127 | } |
| 128 | return $feed; |
| 129 | } |
| 130 | |
| 131 | /** Write a feed to a cache file |
| 132 | */ |
| 133 | private function writeToFile() |
| 134 | { |
| 135 | $file = BananaFeed::filename(); |
| 136 | file_put_contents($file, serialize($this)); |
| 137 | } |
| 138 | |
| 139 | /** Merge to feeds into a new one |
| 140 | */ |
| 141 | static public function &merge(&$feed1, &$feed2, $name, $description = null) |
| 142 | { |
| 143 | if (!$feed1) { |
| 144 | $feed = null; |
| 145 | $feed1 =& $feed2; |
| 146 | $feed2 =& $feed; |
| 147 | } |
| 148 | if ($feed1->group == $name) { |
| 149 | $master =& $feed1; |
| 150 | $slave =& $feed2; |
| 151 | } else if ($feed2 && $feed2->group == $name) { |
| 152 | $master =& $feed2; |
| 153 | $slave =& $feed1; |
| 154 | } else { |
| 155 | $master = new BananaFeed(); |
| 156 | $master->group = $name; |
| 157 | $master->description = $description; |
| 158 | foreach ($feed1->messages as $key=>$message) { |
| 159 | $message['title'] = '[' . $feed1->group . '] ' . $message['title']; |
| 160 | $master->messages[$feed1->group . '-' . $key] = $message; |
| 161 | } |
| 162 | $slave =& $feed2; |
| 163 | } |
| 164 | if (!$slave) { |
| 165 | return $master; |
| 166 | } |
| 167 | $messages = array(); |
| 168 | $m1 = end($master->messages); |
| 169 | $m2 = end($slave->messages); |
| 170 | for ($i = 0 ; $i < 2 * Banana::$feed_size && ($m1 || $m2) ; $i++) { |
| 171 | if ($m2 && (!$m1 || $m1['date'] < $m2['date'])) { |
| 172 | $m2['title'] = '[' . $feed2->group . '] ' . $m2['title']; |
| 173 | $messages[$slave->group . '-' . key($slave->messages)] = $m2; |
| 174 | $m2 = prev($slave->messages); |
| 175 | } else { |
| 176 | $messages[key($master->messages)] = $m1; |
| 177 | $m1 = prev($master->messages); |
| 178 | } |
| 179 | } |
| 180 | uasort($messages, array('BananaFeed', 'compare')); |
| 181 | $master->messages =& $messages; |
| 182 | $master->lastupdate = time(); |
| 183 | return $master; |
| 184 | } |
| 185 | |
| 186 | static function compare($a, $b) |
| 187 | { |
| 188 | if ($a['date'] == $b['date']) { |
| 189 | return 0; |
| 190 | } |
| 191 | return $a['date'] < $b['date'] ? -1 : 1; |
| 192 | } |
| 193 | |
| 194 | /** Generate the feed xml |
| 195 | */ |
| 196 | public function toXML() |
| 197 | { |
| 198 | Banana::$page->assign_by_ref('feed', $this); |
| 199 | return Banana::$page->feed(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | // vim:set et sw=4 sts=4 ts=4 enc=utf-8: |
| 204 | ?> |