76 lines
2.4 KiB
PHP
76 lines
2.4 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: leanderschmedemann
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* Date: 02/03/2017
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* Time: 09:59
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*/
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require_once('includes.inc.php');
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class Database
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{
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private $db;
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function __construct() {
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$this->db = pg_connect("host=".DATABASE_URL." dbname=".DATABASE_NAME." user=".DATABASE_USER." password=".DATABASE_PASSWORD);
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}
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// Execute $sql unsing array $params as params when needed.
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function query($sql, $params = null) {
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$result = null;
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$error = 0;
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if(isset($params)) {
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$result = @pg_query_params($this->db, $sql, $params);
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} else {
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$result = @pg_query($this->db, $sql);
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}
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if(!$result) {
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$error = 10101;
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}
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if($error == 0) {
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$data = pg_fetch_all($result);
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} else {
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$data = null;
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}
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$query_response=array('data' => $data, 'error' => $error);
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return $query_response;
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}
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// Create response to API request.
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static function create_response($data, $error, $values = null) {
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$status_message = Database::create_status_code($error, $values);
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$meta = array('status'=>$error, 'message'=>$status_message);
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if($error != 0){
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$data = '';
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}
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$response_element_json = json_encode(array('meta'=>$meta, 'data'=>$data), JSON_PRETTY_PRINT);
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return $response_element_json;
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}
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// Create status message from status code.
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static function create_status_code($error, $values) {
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switch ($error) {
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case 0:
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return 'Success.';
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case 10101:
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return 'SQL statement did not give a result.';
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case 11101:
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return 'User name does not match rules. User name must be 6 to 20 characters and consist of English letters and numbers only.';
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case 11102:
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return 'User name already exists. Please pick a different name.';
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case 12101:
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return 'User name not specified. This is an internal error.';
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case 12102:
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return 'A game without a question is not possible. Please select new game length.';
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case 12103:
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return 'Sorry, we only have '.$values[0].' questions. Please try again.';
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case 12104:
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return 'The specified user name does not exist.';
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default:
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return 'An unknown error occurred.';
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}
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}
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}
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?>
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