feat: built in api documentation via huma gin adapter

backend/internal/middleware/error_handler.go

@@ -2,13 +2,10 @@ package middleware
 
 import (
 	"errors"
-	"fmt"
 	"net/http"
 	"strings"
 
 	"github.com/gin-gonic/gin"
-	"github.com/gin-gonic/gin/binding"
-	"github.com/go-playground/validator/v10"
 	"github.com/pocket-id/pocket-id/backend/internal/common"
 	"gorm.io/gorm"
 )
@@ -29,24 +26,6 @@ func (m *ErrorHandlerMiddleware) Add() gin.HandlerFunc {
 				return
 			}
 
-			// Check for validation errors
-			var validationErrors validator.ValidationErrors
-			if errors.As(err, &validationErrors) {
-				message := handleValidationError(validationErrors)
-				errorResponse(c, http.StatusBadRequest, message)
-				return
-			}
-
-			// Check for slice validation errors
-			svErr, ok := errors.AsType[binding.SliceValidationError](err)
-			if ok {
-				if errors.As(svErr[0], &validationErrors) {
-					message := handleValidationError(validationErrors)
-					errorResponse(c, http.StatusBadRequest, message)
-					return
-				}
-			}
-
 			// AppError with description
 			appDescErr, ok := errors.AsType[common.AppErrorDescription](err)
 			if ok {
@@ -89,37 +68,3 @@ func errorResponseWithDescription(c *gin.Context, statusCode int, message string
 		ErrorDescription: description,
 	})
 }
-
-func handleValidationError(validationErrors validator.ValidationErrors) string {
-	var errorMessages []string
-
-	for _, ve := range validationErrors {
-		fieldName := ve.Field()
-		var errorMessage string
-		switch ve.Tag() {
-		case "required":
-			errorMessage = fmt.Sprintf("%s is required", fieldName)
-		case "email":
-			errorMessage = fmt.Sprintf("%s must be a valid email address", fieldName)
-		case "username":
-			errorMessage = fmt.Sprintf("%s must only contain letters, numbers, underscores, dots, hyphens, and '@' symbols and not start or end with a special character", fieldName)
-		case "url":
-			errorMessage = fmt.Sprintf("%s must be a valid URL", fieldName)
-		case "resource_uri":
-			errorMessage = fmt.Sprintf("%s must be an absolute URI without whitespace or a fragment", fieldName)
-		case "min":
-			errorMessage = fmt.Sprintf("%s must be at least %s characters long", fieldName, ve.Param())
-		case "max":
-			errorMessage = fmt.Sprintf("%s must be at most %s characters long", fieldName, ve.Param())
-		default:
-			errorMessage = fmt.Sprintf("%s is invalid", fieldName)
-		}
-
-		errorMessages = append(errorMessages, errorMessage)
-	}
-
-	// Join all the error messages into a single string
-	combinedErrors := strings.Join(errorMessages, ", ")
-
-	return combinedErrors
-}