<?php
class ext_confcenter {
	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_confcenter 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 conf center extensions */
		$query = $pdo->prepare("SELECT * FROM ext_confcenter 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 confcenter */
		$data['type'] = 'confcenter';

		/* triger a save on the extensions tables */
		$data['pk_extension'] = extensions::save($data);

		/* create a record in the ext_confcenter table if this is a newly created extension */
		if ($create_new) {
			$query = $pdo->prepare("INSERT INTO ext_confcenter(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 conf center extension option */
		$query = $pdo->prepare("
			UPDATE
				ext_confcenter
			SET
				invalidtries = :invalidtries,
				transferext  = :transferext
			WHERE
				pk_extension = :pk_extension
		");
		$query->bindValue(':invalidtries', $data['invalidtries'], PDO::PARAM_INT);
		$query->bindValue(':transferext' , $data['transferext'] , 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]);
		}

		return $data['pk_extension'];
	}
	static function validate($data) {
		$errors = array();

		/* validate first against the extensions table */
		$errors = extensions::validate($data);

		/* check the format for the transfer extensions, if one was entered */
		if(!empty($data['transferext'])){
			if(! preg_match('/^[0-9]{3,5}$/', $data['transferext'])) {
				$errors['transferext']['invalid'] = true;
			}
		}

		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 conf center extensions table */
		$query = $pdo->prepare("DELETE FROM ext_confcenter 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]);
		}
	}
}