v6 update

app/Rules/Base64Mime.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace Crater\Rules;
+
+use Illuminate\Contracts\Validation\Rule;
+
+class Base64Mime implements Rule
+{
+    private $attribute;
+
+    private $extensions;
+
+    /**
+     * Create a new rule instance.
+     *
+     * @return void
+     */
+    public function __construct(array $extensions)
+    {
+        $this->extensions = $extensions;
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @return bool
+     */
+    public function passes($attribute, $value)
+    {
+        $this->attribute = $attribute;
+
+        try {
+            $data = json_decode($value)->data;
+        } catch (\Exception $e) {
+            return false;
+        }
+
+        $pattern = '/^data:\w+\/[\w\+]+;base64,[\w\+\=\/]+$/';
+
+        if (! preg_match($pattern, $data)) {
+            return false;
+        }
+
+        $data = explode(',', $data);
+
+        if (! isset($data[1]) || empty($data[1])) {
+            return false;
+        }
+
+        try {
+            $data = base64_decode($data[1]);
+            $f = finfo_open();
+            $result = finfo_buffer($f, $data, FILEINFO_EXTENSION);
+
+            if ($result === '???') {
+                return false;
+            }
+
+            if (strpos($result, '/')) {
+                foreach (explode('/', $result) as $ext) {
+                    if (in_array($ext, $this->extensions)) {
+                        return true;
+                    }
+                }
+            } else {
+                if (in_array($result, $this->extensions)) {
+                    return true;
+                }
+            }
+        } catch (\Exception $e) {
+            return false;
+        }
+
+        return false;
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return string
+     */
+    public function message()
+    {
+        return 'The '.$this->attribute.' must be a json with file of type: '.implode(', ', $this->extensions).' encoded in base64.';
+    }
+}