+/**
+ * Format a backtrace line for debug output roughly like debug_print_backtrace() does.
+ * Exceptions already have this built in, but PEAR error objects just give us the array.
+ *
+ * @param int $n line number
+ * @param array $line per-frame array item from debug_backtrace()
+ * @return string
+ */
+function formatBacktraceLine($n, $line)
+{
+ $out = "#$n ";
+ if (isset($line['class'])) $out .= $line['class'];
+ if (isset($line['type'])) $out .= $line['type'];
+ if (isset($line['function'])) $out .= $line['function'];
+ $out .= '(';
+ if (isset($line['args'])) {
+ $args = array();
+ foreach ($line['args'] as $arg) {
+ // debug_print_backtrace seems to use var_export
+ // but this gets *very* verbose!
+ $args[] = gettype($arg);
+ }
+ $out .= implode(',', $args);
+ }
+ $out .= ')';
+ $out .= ' called at [';
+ if (isset($line['file'])) $out .= $line['file'];
+ if (isset($line['line'])) $out .= ':' . $line['line'];
+ $out .= ']';
+ return $out;
+}
+
+function checkMirror($action_obj, $args)
+{
+ global $config;
+
+ static $alwaysRW = array('session', 'remember_me');
+
+ if (common_config('db', 'mirror') && $action_obj->isReadOnly($args)) {
+ if (is_array(common_config('db', 'mirror'))) {
+ // "load balancing", ha ha
+ $arr = common_config('db', 'mirror');
+ $k = array_rand($arr);
+ $mirror = $arr[$k];
+ } else {
+ $mirror = common_config('db', 'mirror');
+ }
+
+ // We ensure that these tables always are used
+ // on the master DB
+
+ $config['db']['database_rw'] = $config['db']['database'];
+ $config['db']['ini_rw'] = INSTALLDIR.'/classes/statusnet.ini';
+
+ foreach ($alwaysRW as $table) {
+ $config['db']['table_'.$table] = 'rw';
+ }
+
+ // everyone else uses the mirror
+
+ $config['db']['database'] = $mirror;
+ }
+}
+
+function isLoginAction($action)
+{
+ static $loginActions = array('login', 'recoverpassword', 'api', 'doc', 'register', 'publicxrds');
+
+ $login = null;
+
+ if (Event::handle('LoginAction', array($action, &$login))) {
+ $login = in_array($action, $loginActions);
+ }
+
+ return $login;
+}
+