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<?php
require_once(__DIR__ . '/BridgeConf.php');
require_once(__DIR__ . '/Util.php');
class Bridge {
protected $db;
public function __construct($db = FALSE) {
$this->db = $db ? $db :
new PDO('mysql:host=' . DB_HOST . ';dbname=' . DB, DB_USER, DB_PASS);
$this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
public function getPostId($messageId) {
throw_if_null($messageId);
$sql = 'SELECT post_id FROM posts ' .
'WHERE message_id = ' . $this->db->quote($messageId);
$row = $this->get_exactly_one_row($sql);
return $row ? $row['post_id'] : false;
}
public function getMessageId($postId) {
throw_if_null($postId);
$sql = 'SELECT p1.message_id FROM posts AS p1 ' .
'LEFT OUTER JOIN posts AS p2 ON (' .
'p1.post_id = ' . $postId . ' AND ' .
'p2.post_id = ' . $postId . ' AND ' .
'p1.edit_id < p2.edit_id' .
') WHERE p2.post_id IS NULL';
$row = $this->get_exactly_one_row($sql);
return $row ? $row['message_id'] : false;
}
public function setPostId($messageId, $postId) {
throw_if_null($messageId);
throw_if_null($postId);
$sql = 'UPDATE posts SET ' .
'post_id = ' . $postId . ' ' .
'WHERE message_id = ' . $this->db->quote($messageId);
$count = $this->db->exec($sql);
if ($count != 1) {
throw new Exception('Failed to set post id: ' . $messageId);
}
}
public function getDefaultForumId($list) {
throw_if_null($list);
$sql = 'SELECT forum_id FROM forums ' .
'WHERE list_name = ' . $this->db->quote($list);
$row = $this->get_exactly_one_row($sql);
return $row ? $row['forum_id'] : false;
}
public function getLists($forumId) {
throw_if_null($forumId);
$sql = 'SELECT list_name FROM forums ' .
'WHERE forum_id = ' . $forumId;
$result = $this->db->query($sql);
$rows = $result->fetchAll(PDO::FETCH_COLUMN);
$result->closeCursor();
return $rows;
}
public function registerMessage($postId, $messageId, $inReplyTo) {
throw_if_null($messageId);
$sql = 'INSERT IGNORE INTO posts ' .
'(post_id, message_id, in_reply_to) ' .
'VALUES (' . ($postId === null ? 'NULL' : $postId) . ', '
. $this->db->quote($messageId) . ', '
. $this->quote($inReplyTo) . ')';
$count = $this->db->exec($sql);
return $count == 1;
}
public function unregisterMessage($messageId) {
throw_if_null($messageId);
$sql = 'DELETE FROM posts WHERE message_id = ' .
$this->db->quote($messageId);
$count = $this->db->exec($sql);
if ($count != 1) {
throw new Exception('Failed to delete message id: ' . $messageId);
}
}
public function unregisterPost($postId) {
throw_if_null($postId);
# FIXME: this might need adjusting now that there can be more than one
# message id per post id.
$sql = 'DELETE FROM posts WHERE post_id = ' . $postId;
$count = $this->db->exec($sql);
if ($count != 1) {
throw new Exception('Failed to delete post id: ' . $postId);
}
}
protected function get_exactly_one_row($sql) {
$result = $this->db->query($sql);
$rows = $result->fetchAll(PDO::FETCH_ASSOC);
$result->closeCursor();
switch (count($rows)) {
case 0:
return false;
case 1:
return $rows[0];
default:
throw new Exception("Too many rows returned: $sql");
}
}
protected function quote($arg) {
return $arg === null ? 'NULL' : $this->db->quote($arg);
}
}
?>
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