Add custom errors

app/controllers/api/v1/api_controller.rb

@@ -1,68 +1,73 @@
-class Api::V1::ApiController < ActionController::API
-##### Doorkeeper
-    include Doorkeeper::Rails::Helpers
+module Api::V1
+    class ApiController < ActionController::API
+    ##### Doorkeeper
+        include Doorkeeper::Rails::Helpers
 
-##### Errors
-    rescue_from ActiveRecord::RecordInvalid, with: :render_unprocessable_entity_response
-    rescue_from ActiveRecord::RecordNotDestroyed, with: :render_unprocessable_entity_response
-    rescue_from ActiveRecord::RecordNotFound, with: :render_not_found_response
-    rescue_from ActiveRecord::RecordNotSaved, with: :render_unprocessable_entity_response
-    rescue_from ActiveRecord::RecordNotUnique, with: :render_unprocessable_entity_response
-    rescue_from ActionController::ParameterMissing, with: :render_unprocessable_entity_response
+    ##### Errors
+        rescue_from ActiveRecord::RecordInvalid, with: :render_unprocessable_entity_response
+        rescue_from ActiveRecord::RecordNotDestroyed, with: :render_unprocessable_entity_response
+        rescue_from ActiveRecord::RecordNotFound, with: :render_not_found_response
+        rescue_from ActiveRecord::RecordNotSaved, with: :render_unprocessable_entity_response
+        rescue_from ActiveRecord::RecordNotUnique, with: :render_unprocessable_entity_response
+        rescue_from Api::V1::SameFavoriteUserError, with: :render_unprocessable_entity_response
+        rescue_from Api::V1::FavoriteAlreadyExistsError, with: :render_unprocessable_entity_response
+        rescue_from Api::V1::UnauthorizedError, with: :render_unauthorized_response
+        rescue_from ActionController::ParameterMissing, with: :render_unprocessable_entity_response
 
-##### Hooks
-    before_action :current_user
-    before_action :set_default_content_type
+    ##### Hooks
+        before_action :current_user
+        before_action :set_default_content_type
 
-##### Responders
-    respond_to :json
+    ##### Responders
+        respond_to :json
 
-##### Methods
-    # Assign the current user if the Doorkeeper token isn't nil, then
-    # update the current user's last seen datetime and last IP address
-    # before returning
-    def current_user
-        @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
-        @current_user.update_last_ip_and_last_seen!(request.remote_ip) if @current_user
+    ##### Methods
+        # Assign the current user if the Doorkeeper token isn't nil, then
+        # update the current user's last seen datetime and last IP address
+        # before returning
+        def current_user
+            @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
+            @current_user.update_last_ip_and_last_seen!(request.remote_ip) if @current_user
 
-        return @current_user
-    end
+            return @current_user
+        end
 
-    # Set the response content-type
-    def set_content_type(content_type)
-        response.headers["Content-Type"] = content_type
-    end
+        # Set the response content-type
+        def set_content_type(content_type)
+            response.headers["Content-Type"] = content_type
+        end
 
-    # Set the default response content-type to application/javascript
-    # with a UTF-8 charset
-    def set_default_content_type
-        set_content_type("application/javascript; charset=utf-8")
-    end
+        # Set the default response content-type to application/javascript
+        # with a UTF-8 charset
+        def set_default_content_type
+            set_content_type("application/javascript; charset=utf-8")
+        end
 
-    def current_user
-        @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
+        def current_user
+            @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
 
-        return @current_user
-    end
+            return @current_user
+        end
 
-    ### Error response methods
-    def render_unprocessable_entity_response(exception)
-        @exception = exception
-        render action: 'errors', status: :unprocessable_entity
-    end
+        ### Error response methods
+        def render_unprocessable_entity_response(exception)
+            @exception = exception
+            render action: 'errors', status: :unprocessable_entity
+        end
 
-    def render_not_found_response
-        response = { errors: [{ message: "Record could not be found.", code: "not_found" }]}
-        render 'not_found', status: :not_found
-    end
+        def render_not_found_response
+            response = { errors: [{ message: "Record could not be found.", code: "not_found" }]}
+            render 'not_found', status: :not_found
+        end
 
-    def render_unauthorized_response
-        render action: 'errors', status: :unauthorized
-    end
+        def render_unauthorized_response
+            render action: 'errors', status: :unauthorized
+        end
 
-    private
+        private
 
-    def restrict_access
-        raise UnauthorizedError unless current_user
+        def restrict_access
+            raise UnauthorizedError unless current_user
+        end
     end
 end

app/errors/api/v1/FavoriteAlreadyExistsError.rb

@@ -0,0 +1,22 @@
+module Api::V1
+    class FavoriteAlreadyExistsError < StandardError
+        def http_status
+            422
+        end
+
+        def code
+            "favorite_already_exists"
+        end
+
+        def message
+            "This user has favorited this party already"
+        end
+
+        def to_hash
+            {
+                message: message,
+                code: code
+            }
+        end
+    end
+end

app/errors/api/v1/SameFavoriteUserError.rb

@@ -0,0 +1,22 @@
+module Api::V1
+    class SameFavoriteUserError < StandardError
+        def http_status
+            422
+        end
+
+        def code
+            "same_favorite_user"
+        end
+
+        def message
+            "Users cannot favorite their own parties"
+        end
+
+        def to_hash
+            {
+                message: message,
+                code: code
+            }
+        end
+    end
+end

app/errors/api/v1/UnauthorizedError.rb

@@ -0,0 +1,22 @@
+module Api::V1
+    class UnauthorizedError < StandardError
+        def http_status
+            401
+        end
+
+        def code
+            "unauthorized"
+        end
+
+        def message
+            "User is not allowed to modify that resource"
+        end
+
+        def to_hash
+            {
+                message: message,
+                code: code
+            }
+        end
+    end
+end