88 lines
3.4 KiB
PHP
88 lines
3.4 KiB
PHP
<?php
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/**
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* Table Definition for msn_waiting_message
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*/
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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class Msn_waiting_message extends Managed_DataObject {
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public $__table = 'msn_waiting_message'; // table name
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public $id; // int primary_key not_null auto_increment
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public $screenname; // varchar(255) not_null
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public $message; // text not_null
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public $claimed; // datetime()
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public $created; // datetime() not_null
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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public static function schemaDef()
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{
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return array(
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'fields' => array(
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'id' => array('type' => 'int', 'not null' => true, 'description' => 'Unique ID for entry'),
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'screenname' => array('type' => 'varchar', 'length' => 255, 'description' => 'from screenname'),
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'message' => array('type' => 'text', 'not null' => true, 'description' => 'MSN message text'),
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'claimed' => array('type' => 'datetime', 'description' => 'date this irc message was claimed'),
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'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
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'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
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),
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'primary key' => array('id'),
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'indexes' => array(
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'msn_waiting_message_prioritise_idx' => array('screenname'),
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),
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);
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}
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/**
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* @param string $screenname screenname or array of screennames to pull from
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* If not specified, checks all queues in the system.
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*/
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public static function top($screenname = null) {
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$wm = new Msn_waiting_message();
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if ($screenname) {
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if (is_array($screenname)) {
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// @fixme use safer escaping
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$list = implode("','", array_map('addslashes', $screenname));
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$wm->whereAdd("screenname in ('$list')");
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} else {
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$wm->screenname = $screenname;
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}
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}
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$wm->orderBy('created');
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$wm->whereAdd('claimed is null');
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$wm->limit(1);
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$cnt = $wm->find(true);
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if ($cnt) {
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// XXX: potential race condition
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// can we force it to only update if claimed is still null
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// (or old)?
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common_log(LOG_INFO, 'claiming msn waiting message id = ' . $wm->id);
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$orig = clone($wm);
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$wm->claimed = common_sql_now();
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$result = $wm->update($orig);
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if ($result) {
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common_log(LOG_INFO, 'claim succeeded.');
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return $wm;
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} else {
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common_log(LOG_INFO, 'claim failed.');
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}
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}
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$wm = null;
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return null;
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}
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/**
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* Release a claimed item.
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*/
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public function releaseClaim() {
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// DB_DataObject doesn't let us save nulls right now
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$sql = sprintf("UPDATE msn_waiting_message SET claimed=NULL WHERE id=%d", $this->id);
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$this->query($sql);
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$this->claimed = null;
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$this->encache();
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}
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}
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