Improve validation

null values could produce server errors.

Author: mzur

src/Annotation.php

@@ -40,6 +40,10 @@ public static function validate(array $data): void
             if (!array_key_exists($key, $data)) {
                 throw new \Exception("Missing key '$key' in Annotation");
             }
+
+            if (is_null($data[$key])) {
+                throw new \Exception("Missing value for '$key' in Category");
+            }
         }
     }
 

src/Category.php

@@ -26,6 +26,10 @@ public static function validate(array $data): void
             if (!array_key_exists($key, $data)) {
                 throw new \Exception("Missing key '$key' in Category");
             }
+
+            if (is_null($data[$key])) {
+                throw new \Exception("Missing value for '$key' in Category");
+            }
         }
     }
 }

src/Coco.php

@@ -70,6 +70,10 @@ public static function validate(array $data): void
             if (!array_key_exists($key, $data)) {
                 throw new \Exception("Missing key '$key' in Coco");
             }
+
+            if (is_null($data[$key])) {
+                throw new \Exception("Missing value for '$key' in Coco");
+            }
         }
     }
 

src/Image.php

@@ -39,6 +39,10 @@ public static function validate(array $data): void
             if (!array_key_exists($key, $data)) {
                 throw new \Exception("Missing key '$key' in Image");
             }
+
+            if (is_null($data[$key])) {
+                throw new \Exception("Missing value for '$key' in Image");
+            }
         }
     }
 }