feat: add app and database modules

app/Support/DataTable.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Support;
+
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class DataTable
+{
+    public static function isDataTableRequest(Request $request): bool
+    {
+        return $request->ajax() || $request->has('draw');
+    }
+
+    public static function draw(Request $request): int
+    {
+        return max(0, (int) $request->input('draw', 0));
+    }
+
+    public static function start(Request $request): int
+    {
+        return max(0, (int) $request->input('start', 0));
+    }
+
+    public static function length(Request $request, int $default = 25): int
+    {
+        $length = (int) $request->input('length', $default);
+
+        return $length > 0 ? $length : $default;
+    }
+
+    public static function globalSearch(Request $request): ?string
+    {
+        return self::normalize($request->input('search.value'));
+    }
+
+    public static function columnSearch(Request $request, int $index): ?string
+    {
+        return self::normalize($request->input("columns.$index.search.value"));
+    }
+
+    public static function order(Request $request, int $defaultIndex = 0, string $defaultDir = 'asc'): array
+    {
+        $index = (int) $request->input('order.0.column', $defaultIndex);
+        $dir = strtolower((string) $request->input('order.0.dir', $defaultDir)) === 'desc' ? 'desc' : 'asc';
+
+        return [$index, $dir];
+    }
+
+    public static function response(Request $request, int $recordsTotal, int $recordsFiltered, array $data): JsonResponse
+    {
+        return response()->json([
+            'draw' => self::draw($request),
+            'recordsTotal' => $recordsTotal,
+            'recordsFiltered' => $recordsFiltered,
+            'data' => $data,
+        ]);
+    }
+
+    protected static function normalize(mixed $value): ?string
+    {
+        if (! is_string($value)) {
+            return null;
+        }
+
+        $value = trim($value);
+
+        return $value === '' ? null : $value;
+    }
+}