1 files changed, 132 insertions, 0 deletions
diff --git a/plugins/Msn/msn_waiting_message.php b/plugins/Msn/msn_waiting_message.php
new file mode 100644
index 000000000..0af7c4f3e
--- /dev/null
+++ b/plugins/Msn/msn_waiting_message.php
@@ -0,0 +1,132 @@
+<?php
+/**
+ * Table Definition for msn_waiting_message
+ */
+require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
+
+class Msn_waiting_message extends Memcached_DataObject {
+
+    public $__table = 'msn_waiting_message'; // table name
+    public $id;                              // int primary_key not_null auto_increment
+    public $screenname;                      // varchar(255) not_null
+    public $message;                         // text not_null
+    public $created;                         // datetime() not_null
+    public $claimed;                         // datetime()
+
+    /* Static get */
+    public function staticGet($k, $v = null) {
+        return Memcached_DataObject::staticGet('Msn_waiting_message', $k, $v);
+    }
+
+    /**
+    * return table definition for DB_DataObject
+    *
+    * DB_DataObject needs to know something about the table to manipulate
+    * instances. This method provides all the DB_DataObject needs to know.
+    *
+    * @return array array of column definitions
+    */
+    public function table() {
+        return array('id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
+                     'screenname' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
+                     'message' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
+                     'created' => DB_DATAOBJECT_TIME + DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
+                     'claimed' => DB_DATAOBJECT_TIME + DB_DATAOBJECT_STR);
+    }
+
+    /**
+    * return key definitions for DB_DataObject
+    *
+    * DB_DataObject needs to know about keys that the table has, since it
+    * won't appear in StatusNet's own keys list. In most cases, this will
+    * simply reference your keyTypes() function.
+    *
+    * @return array list of key field names
+    */
+    public function keys() {
+        return array_keys($this->keyTypes());
+    }
+
+    /**
+    * return key definitions for Memcached_DataObject
+    *
+    * Our caching system uses the same key definitions, but uses a different
+    * method to get them. This key information is used to store and clear
+    * cached data, so be sure to list any key that will be used for static
+    * lookups.
+    *
+    * @return array associative array of key definitions, field name to type:
+    *         'K' for primary key: for compound keys, add an entry for each component;
+    *         'U' for unique keys: compound keys are not well supported here.
+    */
+    public function keyTypes() {
+        return array('id' => 'K');
+    }
+
+    /**
+    * Magic formula for non-autoincrementing integer primary keys
+    *
+    * If a table has a single integer column as its primary key, DB_DataObject
+    * assumes that the column is auto-incrementing and makes a sequence table
+    * to do this incrementation. Since we don't need this for our class, we
+    * overload this method and return the magic formula that DB_DataObject needs.
+    *
+    * @return array magic three-false array that stops auto-incrementing.
+    */
+    function sequenceKey() {
+        return array(false, false, false);
+    }
+
+    /**
+     * @param string $screenname screenname or array of screennames to pull from
+     *                          If not specified, checks all queues in the system.
+     */
+    public static function top($screenname = null) {
+        $wm = new Msn_waiting_message();
+        if ($screenname) {
+            if (is_array($screenname)) {
+                // @fixme use safer escaping
+                $list = implode("','", array_map('addslashes', $screenname));
+                $wm->whereAdd("screenname in ('$list')");
+            } else {
+                $wm->screenname = $screenname;
+            }
+        }
+        $wm->orderBy('created');
+        $wm->whereAdd('claimed is null');
+
+        $wm->limit(1);
+
+        $cnt = $wm->find(true);
+
+        if ($cnt) {
+            # XXX: potential race condition
+            # can we force it to only update if claimed is still null
+            # (or old)?
+            common_log(LOG_INFO, 'claiming msn waiting message id = ' . $wm->id);
+            $orig = clone($wm);
+            $wm->claimed = common_sql_now();
+            $result = $wm->update($orig);
+            if ($result) {
+                common_log(LOG_INFO, 'claim succeeded.');
+                return $wm;
+            } else {
+                common_log(LOG_INFO, 'claim failed.');
+            }
+        }
+        $wm = null;
+        return null;
+    }
+
+    /**
+     * Release a claimed item.
+     */
+    public function releaseClaim() {
+        // DB_DataObject doesn't let us save nulls right now
+        $sql = sprintf("UPDATE msn_waiting_message SET claimed=NULL WHERE id=%d", $this->id);
+        $this->query($sql);
+
+        $this->claimed = null;
+        $this->encache();
+    }
+}