<?php
class ext_directory {
	static function records($sort_field='pk_extension', $sort_order='asc', $items_per_page=0, $page_number=1) {
    	$pdo = database::pdo();

		// Calculate the $limit / $offset based on $items_per_page / $page_number
		if ($items_per_page == 0) {
			$limit  = 9999;
			$offset = 0;
		} else {
			$limit  = $items_per_page;
			$offset = ($page_number-1) * $items_per_page;
		}

		// Run the sql query
		$query = $pdo->prepare('SELECT * FROM ext_directory LIMIT :limit OFFSET :offset');
		// TODO: Implemente sorting
		$query->bindParam(':limit'     , $limit     , PDO::PARAM_INT);
		$query->bindParam(':offset'    , $offset    , PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}

		$ret = $query->fetchAll(PDO::FETCH_ASSOC);
		return $ret;
	}
	static function retrive($pk_extension) {
		$pdo = database::pdo();
		
		$extension = extensions::retrive($pk_extension);

		/* Get general information about this directory extension */
		$query = $pdo->prepare("SELECT * FROM ext_directory WHERE pk_extension=:pk_extension LIMIT 1");
		$query->bindParam(':pk_extension', $pk_extension, PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}
		$ret = $query->fetch(PDO::FETCH_ASSOC);

		/* If we have no results at the last query, return a null array */
		if ($query->rowCount() != 1) {
			return null;
		}
		$ret = array_merge((array)$extension, $ret);

		/* Get the list of members for this directory */
		$query = $pdo->prepare("SELECT fk_extension_member, fk_group_member FROM ext_directory_members WHERE fk_extension = :pk_extension");
		$query->bindParam(':pk_extension', $pk_extension, PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}
		while ($result = $query->fetch(PDO::FETCH_ASSOC)) {
			if ($result['fk_extension_member'] != 0) { $ret['member_extensions'][] = $result['fk_extension_member']; }
			if ($result['fk_group_member']     != 0) { $ret['member_group']        = $result['fk_group_member']; } 
		}
		
		return $ret;
	}
	static function save($data) {
		$pdo = database::pdo();
		
		/* set a flag if this is a newly created extension */
		if ($data['pk_extension'] == "") {
			$create_new = true;
		}
		
		/* force type to directory */
		$data['type'] = 'directory';

		/* triger a save on the extensions tables */
		$data['pk_extension'] = extensions::save($data);
		
		/* create a record in the ext_directory table if this is a newly created extension */
		if ($create_new) {
			$query = $pdo->prepare("INSERT INTO ext_directory(pk_extension) VALUES(:pk_extension)");
			$query->bindParam(':pk_extension', $data['pk_extension'], PDO::PARAM_INT);
			$query->execute();
			if ($query->errorCode() != '00000') {
				$error = $query->errorInfo();
				throw new Exception($error[2]);
			}
		}
		
		/* update the directory extension options */
		$query = $pdo->prepare("
			UPDATE
				ext_directory
			SET
				use_members_byaccount = :use_members_byaccount,
				which_name            = :which_name,
				callbackextension     = :callbackextension
			WHERE
				pk_extension = :pk_extension");
		$query->bindValue(':use_members_byaccount', $data['use_members_byaccount']=='1'?1:0, PDO::PARAM_INT);
		$query->bindValue(':which_name'           , $data['which_name']                    , PDO::PARAM_STR);
		$query->bindValue(':callbackextension'    , $data['callbackextension']             , PDO::PARAM_STR);
		$query->bindValue(':pk_extension'         , $data['pk_extension']                  , PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}
		
		/* update directory members of this extension */
		/* note : we updat by doing a delete all then insert new */
		$query = $pdo->prepare("DELETE FROM ext_directory_members WHERE fk_extension = :pk_extension");
		$query->bindValue(':pk_extension', $data['pk_extension']);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}
		
		if (is_array($data['member_extensions'])) {
			foreach ($data['member_extensions'] as $fk_extension_member) {
				$query = $pdo->prepare("INSERT INTO ext_directory_members (fk_extension, fk_extension_member, fk_group_member) VALUES (:pk_extension, :fk_extension_member, 0)");
				$query->bindValue(':pk_extension'       , $data['pk_extension'], PDO::PARAM_INT);
				$query->bindValue(':fk_extension_member', $fk_extension_member , PDO::PARAM_INT);
				$query->execute();
				if ($query->errorCode() != '00000') {
					$error = $query->errorInfo();
					throw new Exception($error[2]);
				}
			}
		} elseif (isset($data['member_group'])) {
			$query = $pdo->prepare("INSERT INTO ext_directory_members (fk_extension, fk_extension_member, fk_group_member) VALUES (:pk_extension, 0, :fk_group_member)");
			$query->bindValue(':pk_extension'   , $data['pk_extension'], PDO::PARAM_INT);
			$query->bindValue(':fk_group_member', $data['member_group'], PDO::PARAM_INT);
			$query->execute();
			if ($query->errorCode() != '00000') {
				$error = $query->errorInfo();
				throw new Exception($error[2]);
			}
		}

		/* Notify the pbx about the changes */
		pbx::notify_changes('ext_directory');
		
		return $data['pk_extension'];
	}
	static function validate($data) {
		$errors = array();
		
		/* validate first against the extensions table */
		$errors = extensions::validate($data);

		return $errors;
	}
	static function generate() {
		$ret = extensions::generate();
		
		return $ret;
	}
	static function delete($pk_extension) {
		$pdo = database::pdo();
		
		/* Delete from the extensions table */
		extensions::delete($pk_extension);

		/* Delete entry from the directory extensions table */
		$query = $pdo->prepare("DELETE FROM ext_directory WHERE pk_extension = :pk_extension");
		$query->bindParam(':pk_extension', $pk_extension, PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}
		
		/* delete the members from this directory extension */
		$query = $pdo->prepare("DELETE FROM ext_directory_members WHERE fk_extension = :pk_extension");
		$query->bindParam(':pk_extension', $pk_extension, PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}
		
		/* Notify the pbx about the changes */
		pbx::notify_changes('ext_directory');
	}
}