Field position management

controllers/fields.go

@@ -18,7 +18,7 @@ func Fields(c *fiber.Ctx) error {
 	}
 
 	var fields []models.Field
-	result := db.Order("name collate nocase asc").Find(&fields)
+	result := db.Order("position asc").Find(&fields)
 
 	if result.Error != nil && !errors.Is(result.Error, gorm.ErrRecordNotFound) {
 		return err
@@ -111,8 +111,18 @@ func FieldAdd(c *fiber.Ctx) error {
 			}
 		}
 
+		var lastPosition models.Field
+		result := db.Order("position desc").First(
+			&lastPosition, "person_type = ?", field.PersonType,
+		)
+
+		field.Position = 0
+		if result.RowsAffected > 0 && lastPosition.Position >= 0 {
+			field.Position = lastPosition.Position + 1
+		}
+
 		if len(errors) == 0 {
-			result := db.Create(&field)
+			result = db.Create(&field)
 			if result.Error != nil {
 				return result.Error
 			}
@@ -193,10 +203,97 @@ func FieldDelete(c *fiber.Ctx) error {
 		return err
 	}
 
+	var field models.Field
+	db.Find(&field, "id = ?", id)
+
 	result := db.Delete(&models.Field{}, id)
 	if result.Error != nil {
 		return result.Error
 	}
 
+	if field.ID > 0 {
+		db.Exec(
+			"UPDATE fields SET position = position - 1 WHERE position > ? AND person_type = ?",
+			field.Position, field.PersonType,
+		)
+	}
+
+	return c.Redirect("/admin/fields")
+}
+
+func FieldMoveUp(c *fiber.Ctx) error {
+	id := c.Params("id")
+
+	db, err := helpers.GetDatabase()
+	if err != nil {
+		return err
+	}
+
+	var field models.Field
+	result := db.Find(&field, "id = ?", id)
+
+	if result.Error != nil {
+		return result.Error
+	}
+
+	if result.RowsAffected < 1 {
+		return fiber.NewError(fiber.StatusNotFound, "Not found")
+	}
+
+	if field.Position == 0 {
+		return c.Redirect("/admin/fields")
+	}
+
+	db.Exec(
+		"UPDATE fields SET position = position + 1 WHERE position = ? AND person_type = ?",
+		field.Position-1, field.PersonType,
+	)
+
+	db.Exec(
+		"UPDATE fields SET position = position - 1 WHERE id = ?",
+		field.ID,
+	)
+
+	return c.Redirect("/admin/fields")
+}
+
+func FieldMoveDown(c *fiber.Ctx) error {
+	id := c.Params("id")
+
+	db, err := helpers.GetDatabase()
+	if err != nil {
+		return err
+	}
+
+	var field models.Field
+	result := db.Find(&field, "id = ?", id)
+
+	if result.Error != nil {
+		return result.Error
+	}
+
+	if result.RowsAffected < 1 {
+		return fiber.NewError(fiber.StatusNotFound, "Not found")
+	}
+
+	var lastPosition models.Field
+	result = db.Order("position desc").First(
+		&lastPosition, "person_type = ?", field.PersonType,
+	)
+
+	if result.RowsAffected <= 0 || field.Position >= lastPosition.Position {
+		return c.Redirect("/admin/fields")
+	}
+
+	db.Exec(
+		"UPDATE fields SET position = position - 1 WHERE position = ? AND person_type = ?",
+		field.Position+1, field.PersonType,
+	)
+
+	db.Exec(
+		"UPDATE fields SET position = position + 1 WHERE id = ?",
+		field.ID,
+	)
+
 	return c.Redirect("/admin/fields")
 }