94 lines
3.1 KiB
PHP
94 lines
3.1 KiB
PHP
<?php
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// =====================================================================
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// Database Helper
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// Provides PDO Connection to Database and shared miscellaneous
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// Functions for all API Endpoints.
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// =====================================================================
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require_once __DIR__ . '/init.php';
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// ---------------------------------------------------------------------
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// JSON Response
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// Creates JSON Response including HTTP Status Code and HTTP Header
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// for every API Endpoint and terminates the Script.
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// ---------------------------------------------------------------------
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function json_response($data, $status_code = 200) {
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// Defines HTTP Status Code and HTTP Header
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// 1XX Informational, 2XX Successful, 3XX Redirection,
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// 4XX Client Error, 5XX Server Error
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http_response_code($status_code);
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header('Content-Type: application/json; charset=utf-8');
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// Converts PHP-Array to JSON-String
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echo json_encode($data, JSON_UNESCAPED_UNICODE);
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exit;
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}
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// ---------------------------------------------------------------------
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// Error Response
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// Creates standardized Error Responses with Error Message and HTTP Status
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// Code. Uses json_response() for consistent Formatting.
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// ---------------------------------------------------------------------
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function error_response($message, $status_code = 400) {
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json_response(['error' => $message], $status_code);
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}
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// ---------------------------------------------------------------------
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// Validate Required Fields
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// Checks if specified Fields exist in the given Data Array and are
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// non-empty. Returns an Array of missing Field Names, or an empty
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// Array if all Fields are present.
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// ---------------------------------------------------------------------
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function validate_required($data, $fields) {
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$missing = [];
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foreach ($fields as $field) {
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// Checks if Fields exists in Data Array and are not empty
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if (!isset($data[$field]) || trim($data[$field]) === '') {
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$missing[] = $field;
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}
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}
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// Returns Array of missing Fields or emty Array
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return $missing;
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}
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// ---------------------------------------------------------------------
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// Get POST Input
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// Reads POST Parameters. Returns an associative Array.
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// Fallback to JSON Request Body if no POST Data is present.
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// ---------------------------------------------------------------------
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function get_input() {
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// Checks for standard POST Requests
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if (!empty($_POST)) {
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return array_map('trim', $_POST);
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}
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// Fall back for JSON POST Requests
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$json = file_get_contents('php://input');
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$data = json_decode($json, true);
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if (is_array($data)) {
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return array_map('trim', $data);
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}
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return [];
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}
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// ---------------------------------------------------------------------
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// Get PDO Connection
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// Returns PDO Instance wrapped in a Function to prevent global
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// Variable Dependencies in Endpoint Files.
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// ---------------------------------------------------------------------
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function get_db() {
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global $pdo;
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if (!$pdo) {
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error_response('Database Connection failed.', 500);
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}
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return $pdo;
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} |