tsk-43: Added message limit code (#47)

Closes #43

Reviewed-on: phoenix/textsender-api#47
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

docs/docs.go

@@ -214,6 +214,12 @@ const docTemplate = `{
                             "$ref": "#/definitions/handler.AddMessageResponse"
                         }
                     },
+                    "400": {
+                        "description": "Bad Request",
+                        "schema": {
+                            "$ref": "#/definitions/handler.AddMessageResponse"
+                        }
+                    },
                     "500": {
                         "description": "Internal Server Error",
                         "schema": {

docs/swagger.json

@@ -208,6 +208,12 @@
                             "$ref": "#/definitions/handler.AddMessageResponse"
                         }
                     },
+                    "400": {
+                        "description": "Bad Request",
+                        "schema": {
+                            "$ref": "#/definitions/handler.AddMessageResponse"
+                        }
+                    },
                     "500": {
                         "description": "Internal Server Error",
                         "schema": {

docs/swagger.yaml

@@ -322,6 +322,10 @@ paths:
           description: Created
           schema:
             $ref: '#/definitions/handler.AddMessageResponse'
+        "400":
+          description: Bad Request
+          schema:
+            $ref: '#/definitions/handler.AddMessageResponse'
         "500":
           description: Internal Server Error
           schema:

internal/handler/message.go

@@ -20,11 +20,6 @@ type AddMessageResponse struct {
 	Data    []message.Message `json:"data"`
 }
 
-type GetMessageResponse struct {
-	Message string            `json:"message"`
-	Data    []message.Message `json:"data"`
-}
-
 type MessageHandler struct {
 	MessageStore store.MessageStore
 }
@@ -33,6 +28,8 @@ func NewMessageHandler(str store.MessageStore) *MessageHandler {
 	return &MessageHandler{MessageStore: str}
 }
 
+const Message_Limit = 200
+
 // AddMessage godoc
 // @Summary      Add message
 // @Description  Add a message record to send a text to (requires JWT)
@@ -42,6 +39,7 @@ func NewMessageHandler(str store.MessageStore) *MessageHandler {
 // @Security     BearerAuth
 // @Param 	 request body 	RequestAddMessage true "Data to add message"
 // @Success      201  {object}  AddMessageResponse
+// @Failure      400  {object}  AddMessageResponse
 // @Failure      500  {object}  AddMessageResponse
 // @Router       /message/new [post]
 func (m *MessageHandler) AddMessage(w http.ResponseWriter, r *http.Request) {
@@ -60,21 +58,39 @@ func (m *MessageHandler) AddMessage(w http.ResponseWriter, r *http.Request) {
 	var resp AddMessageResponse
 	newMessage := message.Message{Content: req.Content, UserId: req.UserId}
 
-	ctx := r.Context()
+	if isMessageValid(&newMessage) {
+		ctx := r.Context()
 
-	if err := m.MessageStore.CreateMessage(ctx, &newMessage); err != nil {
-		fmt.Println("Error:", err)
-		statusCode = http.StatusInternalServerError
-		resp.Message = err.Error()
+		if err := m.MessageStore.CreateMessage(ctx, &newMessage); err != nil {
+			fmt.Println("Error:", err)
+			statusCode = http.StatusInternalServerError
+			resp.Message = err.Error()
+		} else {
+			statusCode = http.StatusCreated
+			resp.Message = "Message created"
+			resp.Data = append(resp.Data, newMessage)
+		}
 	} else {
-		statusCode = http.StatusCreated
-		resp.Message = "Message created"
-		resp.Data = append(resp.Data, newMessage)
+		statusCode = http.StatusBadRequest
+		resp.Message = fmt.Sprintf("Message length exceeds maximum limit. Current size: %d Limit: %d", len(newMessage.Content), Message_Limit)
 	}
 
 	RespondWithJSON(w, statusCode, &resp)
 }
 
+func isMessageValid(msg *message.Message) bool {
+	if len(msg.Content) <= Message_Limit {
+		return true
+	} else {
+		return false
+	}
+}
+
+type GetMessageResponse struct {
+	Message string            `json:"message"`
+	Data    []message.Message `json:"data"`
+}
+
 // GetMessage godoc
 // @Summary      Get message
 // @Description  Get a message record to have a recipient to send a text to (requires JWT)