feat: initial foundation for collaborative canteen ordering system in vanilla PHP

app/Core/Http/Request.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Core\Http;
+
+class Request
+{
+    private string $method;
+    private string $uri;
+    private string $path;
+    private array $queryParams;
+    private array $bodyParams;
+    private array $headers;
+
+    public function __construct()
+    {
+        $this->method = strtoupper($_SERVER['REQUEST_METHOD'] ?? 'GET');
+        
+        // Handle method overriding via _method for forms (PUT/DELETE/PATCH)
+        if ($this->method === 'POST' && isset($_POST['_method'])) {
+            $this->method = strtoupper($_POST['_method']);
+        }
+
+        $this->uri = $_SERVER['REQUEST_URI'] ?? '/';
+        $parsedUrl = parse_url($this->uri);
+        $this->path = $parsedUrl['path'] ?? '/';
+        
+        // Trim trailing slash for consistent routing (except root)
+        if ($this->path !== '/' && str_ends_with($this->path, '/')) {
+            $this->path = rtrim($this->path, '/');
+        }
+
+        $this->queryParams = $_GET;
+
+        // Safely extract headers in all SAPIs
+        if (function_exists('getallheaders')) {
+            $this->headers = getallheaders() ?: [];
+        } else {
+            $this->headers = [];
+            foreach ($_SERVER as $name => $value) {
+                if (str_starts_with($name, 'HTTP_')) {
+                    $headerName = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))));
+                    $this->headers[$headerName] = $value;
+                } elseif (in_array($name, ['CONTENT_TYPE', 'CONTENT_LENGTH'], true)) {
+                    $headerName = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', $name))));
+                    $this->headers[$headerName] = $value;
+                }
+            }
+        }
+
+        // Parse JSON or form POST body
+        $contentType = $_SERVER['CONTENT_TYPE'] ?? '';
+        if (str_contains($contentType, 'application/json')) {
+            $rawBody = file_get_contents('php://input');
+            $this->bodyParams = json_decode($rawBody, true) ?: [];
+        } else {
+            $this->bodyParams = $_POST;
+        }
+    }
+
+    public function getMethod(): string
+    {
+        return $this->method;
+    }
+
+    public function getPath(): string
+    {
+        return $this->path;
+    }
+
+    public function getUri(): string
+    {
+        return $this->uri;
+    }
+
+    public function get(string $key, mixed $default = null): mixed
+    {
+        return $this->queryParams[$key] ?? $default;
+    }
+
+    public function post(string $key, mixed $default = null): mixed
+    {
+        return $this->bodyParams[$key] ?? $default;
+    }
+
+    public function all(): array
+    {
+        return array_merge($this->queryParams, $this->bodyParams);
+    }
+
+    public function getBody(): array
+    {
+        return $this->bodyParams;
+    }
+
+    public function getHeader(string $name, ?string $default = null): ?string
+    {
+        $name = strtolower($name);
+        foreach ($this->headers as $key => $value) {
+            if (strtolower($key) === $name) {
+                return $value;
+            }
+        }
+        return $default;
+    }
+
+    public function isJson(): bool
+    {
+        $contentType = $_SERVER['CONTENT_TYPE'] ?? '';
+        $accept = $_SERVER['HTTP_ACCEPT'] ?? '';
+        return str_contains($contentType, 'application/json') || str_contains($accept, 'application/json');
+    }
+}

app/Core/Http/Response.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Core\Http;
+
+class Response
+{
+    private int $statusCode = 200;
+    private array $headers = [];
+    private string $content = '';
+
+    public function setStatusCode(int $code): self
+    {
+        $this->statusCode = $code;
+        return $this;
+    }
+
+    public function getStatusCode(): int
+    {
+        return $this->statusCode;
+    }
+
+    public function setHeader(string $name, string $value): self
+    {
+        $this->headers[$name] = $value;
+        return $this;
+    }
+
+    public function setContent(string $content): self
+    {
+        $this->content = $content;
+        return $this;
+    }
+
+    public function json(mixed $data, int $statusCode = 200): self
+    {
+        $this->statusCode = $statusCode;
+        $this->setHeader('Content-Type', 'application/json');
+        $this->content = json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
+        return $this;
+    }
+
+    public function redirect(string $url, int $statusCode = 302): self
+    {
+        $this->statusCode = $statusCode;
+        $this->setHeader('Location', $url);
+        return $this;
+    }
+
+    public function send(): void
+    {
+        http_response_code($this->statusCode);
+
+        foreach ($this->headers as $name => $value) {
+            header("{$name}: {$value}");
+        }
+
+        echo $this->content;
+    }
+}