Added support for validators

Updated README
Added sample validator

Author: dinevillar

README.md

@@ -163,6 +163,38 @@ async handle(error, options) {
 }
 ```
 
+#### Validator
+> Sample Validator (see examples)
+```` javascript
+const {formatters} = use('Validator');
+const JsonApi = use('JsonApi');
+class UserValidator {
+    get rules(){
+        return {
+            'username': 'required|accepted|max:255',
+            'contact_number': 'required|accepted|max:50',
+            'email': 'required|email|unique:companies,email|max:100'
+        }
+    }
+    
+    get formatter() {
+        return formatters.JsonApi;
+    }
+    
+    async fails({errors}) {
+        for (const error of errors) {
+            const jsonError = JsonApi.JSE.UnprocessableResourceObject.invoke();
+            jsonError.detail = error.detail;
+            jsonError.source = error.source;
+            JsonApi.pushError(jsonError);
+        }
+        return this.ctx.response
+            .status(JsonApi.getJsonErrorStatus())
+            .send(JsonApi.getJsonError());
+    }
+}
+````
+
 #### Serializer Library:
 > [Serializer functions](https://github.com/danivek/json-api-serializer/blob/master/lib/JSONAPISerializer.js)
 ``` javascript

examples/Validators/CompanyValidator.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const {formatters} = use('Validator');
+const JsonApi = use('JsonApi');
+
+class CompanyValidator {
+    get rules() {
+        if (this.ctx.request.method() === 'PATCH') {
+            return {
+                'name': 'max:255',
+                'contact_number': 'max:50',
+                'email': 'email|unique:companies,email|max:100',
+                'web_address': 'max:255',
+                'address_line_1': 'max:255',
+                'address_line_2': 'max:255',
+                'city': 'max:100',
+                'postal_code': 'max:50',
+                'country': 'max:3'
+            }
+        } else {
+            return {
+                'name': 'required|accepted|max:255',
+                'contact_number': 'required|accepted|max:50',
+                'email': 'required|email|unique:companies,email|max:100',
+                'web_address': 'max:255',
+                'address_line_1': 'max:255',
+                'address_line_2': 'max:255',
+                'city': 'max:100',
+                'postal_code': 'required|accepted|max:50',
+                'country': 'required|accepted|max:3'
+            }
+        }
+    }
+
+    get sanitizationRules() {
+        return {
+            'email': 'normalize_email'
+        }
+    }
+
+    get formatter() {
+        return formatters.JsonApi;
+    }
+
+    get validateAll() {
+        return true;
+    }
+
+    async fails({errors}) {
+        for (const error of errors) {
+            const jsonError = JsonApi.JSE.UnprocessableResourceObject.invoke();
+            jsonError.detail = error.detail;
+            jsonError.source = error.source;
+            JsonApi.pushError(jsonError);
+        }
+        return this.ctx.response
+            .status(JsonApi.getJsonErrorStatus())
+            .send(JsonApi.getJsonError());
+    }
+}
+
+module.exports = CompanyValidator;

src/Service/index.js

@@ -55,10 +55,21 @@ class JsonApi {
         return jsonApiError.toJSON();
     }
 
+    getJsonError() {
+        return this.setCommon(
+            {
+                jsonapi: {
+                    version: '1.0'
+                },
+                errors: this.jsonApiErrors
+            }
+        );
+    }
+
     async handleError(error, {request, response}) {
         const jsonApiError = this.parseError(error);
         this.pushError(error);
-        await response.status(jsonApiError.status).send({"errors": this.jsonApiErrors});
+        await response.status(jsonApiError.status).send(this.getJsonError());
         this.jsonApiErrors = [];
     }
 
@@ -83,8 +94,7 @@ class JsonApi {
             }
             return (status400 > status500) ? 400 : 500;
         } else {
-            const jsonApiError = this.jsonApiErrors.pop();
-            return jsonApiError.status;
+            return this.jsonApiErrors[0].status;
         }
     }
 }