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

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;
+    }
+}