Refactor api code: split between packages

internal/appcontext/main.go

@@ -1,6 +1,9 @@
 package appcontext
 
 import (
+	"errors"
+
+	"git.artlef.fr/PersonalLibraryManager/internal/model"
 	"github.com/gin-gonic/gin"
 	"github.com/nicksnyder/go-i18n/v2/i18n"
 	"gorm.io/gorm"
@@ -11,3 +14,13 @@ type AppContext struct {
 	Db   *gorm.DB
 	I18n *i18n.Bundle
 }
+
+func (ac AppContext) GetAuthenticatedUser() (model.User, error) {
+	var user model.User
+	username, userIsInContext := ac.C.Get("user")
+	if !userIsInContext {
+		return user, errors.New("User not found in context")
+	}
+	res := ac.Db.Where("name = ?", username).First(&user)
+	return user, res.Error
+}