add devices to cow

api/handlers/api.go

@@ -36,17 +36,18 @@ func (a *App) New() *mux.Router {
 
 	apiCreate := r.PathPrefix("/api/v1").Subrouter()
 
-	apiCreate.Handle("/cow/{cow_id}", api.Middleware(http.HandlerFunc(cow.CowByIDHandler))).Methods("GET") // By Object ID not CowCode
+	apiCreate.Handle("/cow/{cow_id}", api.Middleware(http.HandlerFunc(cow.CowByIDHandler))).Methods("GET")            // By Object ID not Cow Name
 	apiCreate.Handle("/cows", api.Middleware(http.HandlerFunc(cow.CowHandler))).Methods("GET")                        // Returns all cows
-	apiCreate.Handle("/cows", api.Middleware(http.HandlerFunc(cow.CowHandlerQuery))).Methods("POST")       // Returns list of cows based of query
+	apiCreate.Handle("/cows", api.Middleware(http.HandlerFunc(cow.CowHandlerQuery))).Methods("POST")                  // Returns list of cows based of name query
-	apiCreate.Handle("/cows/new", api.Middleware(http.HandlerFunc(cow.NewCowHandler))).Methods("POST")
+	apiCreate.Handle("/cows/new", api.Middleware(http.HandlerFunc(cow.NewCowHandler))).Methods("POST")                // Create new cow
-	apiCreate.Handle("/cows/update/{cow_id}", api.Middleware(http.HandlerFunc(cow.UpdateCowHandler))).Methods("POST") // By Object ID not CowCode
+	apiCreate.Handle("/cows/update/{cow_id}", api.Middleware(http.HandlerFunc(cow.UpdateCowHandler))).Methods("POST") // Update Cow by Object ID
+	apiCreate.Handle("/cows/add/{cow_id}", api.Middleware(http.HandlerFunc(cow.AddDeviceHandler))).Methods("POST")    // Add Device to cow device list
 
-	apiCreate.Handle("/device/{device_id}", api.Middleware(http.HandlerFunc(device.DeviceByIDHandler))).Methods("GET")
+	apiCreate.Handle("/device/{device_id}", api.Middleware(http.HandlerFunc(device.DeviceByIDHandler))).Methods("GET")            // By Object ID not Device Name
-	apiCreate.Handle("/devices", api.Middleware(http.HandlerFunc(device.DeviceHandler))).Methods("GET")
+	apiCreate.Handle("/devices", api.Middleware(http.HandlerFunc(device.DeviceHandler))).Methods("GET")                           // Returns all devices
-	apiCreate.Handle("/devices", api.Middleware(http.HandlerFunc(device.DeviceHandlerQuery))).Methods("POST")
+	apiCreate.Handle("/devices", api.Middleware(http.HandlerFunc(device.DeviceHandlerQuery))).Methods("POST")                     // Returns list of devices based of name query
-	apiCreate.Handle("/devices/new", api.Middleware(http.HandlerFunc(device.NewDeviceHandler))).Methods("POST")
+	apiCreate.Handle("/devices/new", api.Middleware(http.HandlerFunc(device.NewDeviceHandler))).Methods("POST")                   // create new device
-	apiCreate.Handle("/devices/update/{device_id}", api.Middleware(http.HandlerFunc(device.UpdateDeviceHandler))).Methods("POST")
+	apiCreate.Handle("/devices/update/{device_id}", api.Middleware(http.HandlerFunc(device.UpdateDeviceHandler))).Methods("POST") // Update Device by Object ID
 
 	return r
 }

api/handlers/cow.go

@@ -183,3 +183,38 @@ func (c Cow) UpdateCowHandler(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 	w.Write(b)
 }
+
+func (c Cow) AddDeviceHandler(w http.ResponseWriter, r *http.Request) {
+	var newDevice models.NewDeviceToCow
+
+	cowID := mux.Vars(r)["cow_id"]
+
+	// validate the request body
+	if err := json.NewDecoder(r.Body).Decode(&newDevice); err != nil {
+		config.ErrorStatus("failed to unpack request body", http.StatusInternalServerError, w, err)
+		return
+	}
+
+	// use the validator library to validate required fields
+	if validationErr := validate.Struct(&newDevice); validationErr != nil {
+		config.ErrorStatus("invalid request body", http.StatusBadRequest, w, validationErr)
+		return
+	}
+
+	update := bson.M{
+		"cow.Devices": newDevice,
+	}
+
+	dbResp, err := c.DB.UpdateOne(context.TODO(), bson.M{"_id": cowID}, bson.M{"$push": update})
+	if err != nil {
+		config.ErrorStatus("the device could not be inserted into the cow", http.StatusNotFound, w, err)
+		return
+	}
+	b, err := json.Marshal(dbResp)
+	if err != nil {
+		config.ErrorStatus("failed ot marshal response", http.StatusInternalServerError, w, err)
+		return
+	}
+	w.WriteHeader(http.StatusOK)
+	w.Write(b)
+}

models/io.go

@@ -29,3 +29,8 @@ type MessageError struct {
 type Query struct {
 	Name string `json:"name"`
 }
+
+// NewDeviceToCow to add device object id to cow
+type NewDeviceToCow struct {
+	ID string `json:"_id"`
+}