Add Data Validation

Author: ReactMVC

App/Models/Validation.php

@@ -0,0 +1,104 @@
+<?php
+
+namespace Monster\App\Models;
+
+class Validation
+{
+    private $data;
+    private $rules;
+    private $errors;
+    private $lang;
+
+    public function __construct(array $data, array $rules, string $lang = 'en')
+    {
+        $this->data = $data;
+        $this->rules = $rules;
+        $this->errors = [];
+        $this->lang = $this->loadLanguageFile($lang);
+    }
+
+    public function validate(): bool
+    {
+        foreach ($this->rules as $field => $rule) {
+            $rules = explode('|', $rule);
+
+            foreach ($rules as $singleRule) {
+                [$ruleName, $params] = $this->parseRule($singleRule);
+
+                if (!$this->executeRule($field, $ruleName, $params)) {
+                    $this->addError($field, $ruleName, $params);
+                }
+            }
+        }
+
+        return empty($this->errors);
+    }
+
+    public function getErrors(): array
+    {
+        return $this->errors;
+    }
+
+    private function parseRule(string $rule): array
+    {
+        $params = [];
+
+        if (strpos($rule, ':') !== false) {
+            [$ruleName, $paramsString] = explode(':', $rule, 2);
+            $params = explode(',', $paramsString);
+        } else {
+            $ruleName = $rule;
+        }
+
+        return [$ruleName, $params];
+    }
+
+    private function executeRule(string $field, string $ruleName, array $params): bool
+    {
+        $value = $this->data[$field] ?? null;
+
+        switch ($ruleName) {
+            case 'required':
+                return isset($value) && $value !== '';
+            case 'min':
+                return strlen($value) >= $params[0];
+            case 'max':
+                return strlen($value) <= $params[0];
+            case 'email':
+                return filter_var($value, FILTER_VALIDATE_EMAIL) !== false;
+            case 'number':
+                return is_numeric($value);
+            case 'regex':
+                return preg_match($params[0], $value) === 1;
+            case 'url':
+                return filter_var($value, FILTER_VALIDATE_URL) !== false;
+                // Add more validation rules as needed
+            default:
+                return false;
+        }
+    }
+
+    private function addError(string $field, string $ruleName, array $params)
+    {
+        $message = $this->lang[$ruleName] ?? $this->lang['error'] ?? 'Invalid value';
+        $replacements = [':key' => $field, ':value' => $params[0] ?? ''];
+
+        foreach ($replacements as $key => $value) {
+            $message = str_replace($key, $value, $message);
+        }
+
+        $this->errors[$field][] = $message;
+    }
+
+    private function loadLanguageFile(string $lang): array
+    {
+        $path = __DIR__ . "/../../routes/lang/errors/{$lang}.php";
+
+        if (file_exists($path)) {
+            return include $path;
+        }
+
+        // Fallback language file
+        return include __DIR__ . '/../../routes/lang/errors/en.php';
+    }
+}