Refactor api code: split between packages

internal/routes/userlogin.go

@@ -0,0 +1,47 @@
+package routes
+
+import (
+	"fmt"
+	"net/http"
+
+	"git.artlef.fr/PersonalLibraryManager/internal/appcontext"
+	"git.artlef.fr/PersonalLibraryManager/internal/dto"
+	"git.artlef.fr/PersonalLibraryManager/internal/i18nresource"
+	"git.artlef.fr/PersonalLibraryManager/internal/jwtauth"
+	"git.artlef.fr/PersonalLibraryManager/internal/model"
+	"git.artlef.fr/PersonalLibraryManager/internal/myvalidator"
+	"github.com/gin-gonic/gin"
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+)
+
+func PostLoginHandler(ac appcontext.AppContext) {
+	var user dto.UserLogin
+	err := ac.C.ShouldBindJSON(&user)
+	if err != nil {
+		myvalidator.ManageBindingError(ac, err)
+		return
+	}
+
+	if !isUserAndPasswordOk(ac.Db, user.Username, user.Password) {
+		ac.C.JSON(http.StatusInternalServerError,
+			gin.H{"error": i18nresource.GetTranslatedMessage(ac, "InvalidCredentials")})
+		return
+	}
+
+	var jwtToken string
+	jwtToken, err = jwtauth.GenerateJwtToken(user.Username)
+	if err != nil {
+		ac.C.JSON(http.StatusUnauthorized,
+			gin.H{"error": fmt.Errorf("Error when generating JWT token: %w", err)})
+		return
+	}
+	ac.C.JSON(200, gin.H{"message": i18nresource.GetTranslatedMessage(ac, "AuthenticationSuccess"), "token": jwtToken})
+}
+
+func isUserAndPasswordOk(db *gorm.DB, username string, password string) bool {
+	var user model.User
+	db.Where("name = ?", username).First(&user)
+	err := bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(password))
+	return err == nil
+}