<?php
class ext_ivr {
	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_ivr 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 ivr extension */
		$query = $pdo->prepare("SELECT * FROM ext_ivr 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;
		}
		$ret = array_merge($extension, $ret);

		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 ivr */
		$data['type'] = 'ivr';

		/* triger a save on the extensions tables */
		$data['pk_extension'] = extensions::save($data);
		
		/* create a record in the ext_ivr table if this is a newly created extension */
		if ($create_new) {
			$query = $pdo->prepare("INSERT INTO ext_ivr(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 ivr extension options */
		$query = $pdo->prepare("
			UPDATE
				ext_ivr
			SET
				fk_menu   = :fk_menu,
				fk_action = :fk_action
			WHERE
				pk_extension = :pk_extension
		");
		$query->bindValue(':fk_menu'     , $data['fk_menu']     , PDO::PARAM_INT);
		$query->bindValue(':fk_action'   , $data['fk_action']   , PDO::PARAM_INT);
		$query->bindValue(':pk_extension', $data['pk_extension'], PDO::PARAM_INT);
		$query->execute();
		if ($query->errorCode() != '00000') {
			$error = $query->errorInfo();
			throw new Exception($error[2]);
		}

		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 ivr extensions table */
		$query = $pdo->prepare("DELETE FROM ext_ivr 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]);
		}
	}
}