chore: custom error handler with automatic logging

internal/api/client.go

@@ -1,8 +1,7 @@
 package api
 
 import (
-	"fmt"
-	"log"
+	"errors"
 	"net/http"
 
 	"github.com/google/uuid"
@@ -15,20 +14,19 @@ func (api *API) CreateClientHandler(context echo.Context) error {
 	userId, ok := context.Get("id").(string)
 
 	if !ok {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: errors.New("Session ID not found after authorization."), Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	id, err := uuid.Parse(userId)
 
 	if err != nil {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: err, Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	var body types.CreateClientRequestBody
 
 	if err := context.Bind(&body); err != nil {
-		log.Println(fmt.Sprintf("Error creating Client: %v.", err))
-		return context.String(http.StatusBadRequest, "Invalid JSON!")
+		return types.Error{Code: http.StatusBadRequest, Messages: []string{"Invalid JSON!"}}
 	}
 
 	if err := context.Validate(body); err != nil {
@@ -37,7 +35,6 @@ func (api *API) CreateClientHandler(context echo.Context) error {
 
 	client := api.db.CreateClient(id, body)
 
-	log.Println(fmt.Sprintf("Client created with ID %s.", client.ID))
 	return context.JSON(http.StatusOK, client)
 }
 
@@ -45,22 +42,21 @@ func (api *API) GetAllClientsHandler(context echo.Context) error {
 	userId, ok := context.Get("id").(string)
 
 	if !ok {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: errors.New("Session ID not found after authorization."), Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	id, err := uuid.Parse(userId)
 
 	if err != nil {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: err, Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	clients, err := api.db.GetClients(id)
 
 	if err != nil {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting Clients!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: err, Messages: []string{"Unexpected error getting Clients!"}}
 	}
 
-	log.Println("Got all Clients.")
 	return context.JSON(http.StatusOK, clients)
 }
 
@@ -68,28 +64,27 @@ func (api *API) GetClientHandler(context echo.Context) error {
 	userIdString, ok := context.Get("id").(string)
 
 	if !ok {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: errors.New("Session ID not found after authorization."), Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	userId, err := uuid.Parse(userIdString)
 
 	if err != nil {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: err, Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	id, err := uuid.Parse(context.Param("id"))
 
 	if err != nil {
-		return context.String(http.StatusBadRequest, "ID is required to get a Client!")
+		return types.Error{Code: http.StatusBadRequest, Messages: []string{"ID is required to get a Client!"}}
 	}
 
 	var client types.Client
 
 	if err := api.db.GetClientById(userId, id, &client); err != nil {
-		return context.String(http.StatusNotFound, "Client not found!")
+		return types.Error{Code: http.StatusNotFound, Messages: []string{"Client not found!"}}
 	}
 
-	log.Println(fmt.Sprintf("Got User with ID %s.", client.ID))
 	return context.JSON(http.StatusOK, client)
 }
 
@@ -97,26 +92,31 @@ func (api *API) UpdateClientHandler(context echo.Context) error {
 	userIdString, ok := context.Get("id").(string)
 
 	if !ok {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: errors.New("Session ID not found after authorization."), Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	userId, err := uuid.Parse(userIdString)
 
 	if err != nil {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: err, Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	id, err := uuid.Parse(context.Param("id"))
 
 	if err != nil {
-		return context.String(http.StatusBadRequest, "ID is required to update a Client!")
+		return types.Error{Code: http.StatusBadRequest, Messages: []string{"ID is required to update a Client!"}}
 	}
 
 	var body types.UpdateClientRequestBody
 
 	if err := context.Bind(&body); err != nil {
-		log.Println(fmt.Sprintf("Error updating Client: %v.", err))
-		return context.String(http.StatusBadRequest, "Invalid JSON!")
+		return types.Error{Code: http.StatusBadRequest, Messages: []string{"Invalid JSON!"}}
+	}
+
+	empty := body == types.UpdateClientRequestBody{}
+
+	if empty {
+		return types.Error{Code: http.StatusBadRequest, Messages: []string{"You must update at least one field!"}}
 	}
 
 	if err := context.Validate(body); err != nil {
@@ -126,10 +126,9 @@ func (api *API) UpdateClientHandler(context echo.Context) error {
 	var client types.Client
 
 	if err := api.db.UpdateClient(userId, id, body, &client); err != nil {
-		return context.String(http.StatusNotFound, "Client not found!")
+		return types.Error{Code: http.StatusNotFound, Messages: []string{"Client not found!"}}
 	}
 
-	log.Println(fmt.Sprintf("Updated Client with ID %s.", client.ID))
 	return context.JSON(http.StatusOK, client)
 }
 
@@ -137,25 +136,24 @@ func (api *API) DeleteClientHandler(context echo.Context) error {
 	userIdString, ok := context.Get("id").(string)
 
 	if !ok {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: errors.New("Session ID not found after authorization."), Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	userId, err := uuid.Parse(userIdString)
 
 	if err != nil {
-		return context.String(http.StatusInternalServerError, "Unexpected error getting User!")
+		return types.Error{Code: http.StatusInternalServerError, Cause: err, Messages: []string{"Unexpected error getting User!"}}
 	}
 
 	id, err := uuid.Parse(context.Param("id"))
 
 	if err != nil {
-		return context.String(http.StatusBadRequest, "ID is required to delete a Client!")
+		return types.Error{Code: http.StatusBadRequest, Messages: []string{"ID is required to delete a Client!"}}
 	}
 
 	if err := api.db.DeleteClient(userId, id); err != nil {
-		return context.String(http.StatusNotFound, "Client not found!")
+		return types.Error{Code: http.StatusNotFound, Messages: []string{"Client not found!"}}
 	}
 
-	log.Println(fmt.Sprintf("Deleted Client with ID %s.", id))
-	return context.String(http.StatusOK, "Client deleted successfully!")
+	return context.JSON(http.StatusOK, map[string]string{"message": "Client deleted successfully!"})
 }