feat: add migration to change user ids to usernames in saved filters

pkg/migration/20220815200851.go

@@ -0,0 +1,101 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public Licensee as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public Licensee for more details.
+//
+// You should have received a copy of the GNU Affero General Public Licensee
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package migration
+
+import (
+	"encoding/json"
+	"src.techknowlogick.com/xormigrate"
+	"strconv"
+	"strings"
+	"xorm.io/xorm"
+)
+
+func init() {
+	migrations = append(migrations, &xormigrate.Migration{
+		ID:          "20220815200851",
+		Description: "Migrate saved assignee filter to usernames instead of IDs",
+		Migrate: func(tx *xorm.Engine) error {
+			filters := []map[string]interface{}{} // not using the type here so that the migration does not depend on it
+			err := tx.Select("*").
+				Table("saved_filters").
+				Find(&filters)
+			if err != nil {
+				return err
+			}
+
+			for _, f := range filters {
+				filter := map[string]interface{}{}
+				err = json.Unmarshal([]byte(f["filters"].(string)), &filter)
+				if err != nil {
+					return err
+				}
+				filterBy := filter["filter_by"].([]interface{})
+				filterValue := filter["filter_value"].([]interface{})
+				for p, fb := range filterBy {
+					if fb == "assignees" || fb == "user_id" {
+						userIDs := []int64{}
+						for _, sid := range strings.Split(filterValue[p].(string), ",") {
+							id, err := strconv.ParseInt(sid, 10, 64)
+							if err != nil {
+								return err
+							}
+							userIDs = append(userIDs, id)
+						}
+
+						usernames := []string{}
+						err := tx.Select("username").
+							Table("users").
+							In("id", userIDs).
+							Find(&usernames)
+						if err != nil {
+							return err
+						}
+
+						userfilter := ""
+						for i, username := range usernames {
+							if i > 0 {
+								userfilter += ","
+							}
+							userfilter += username
+						}
+						filterValue[p] = userfilter
+					}
+				}
+
+				filter["filter_value"] = filterValue
+				filtersJSON, err := json.Marshal(filter)
+				if err != nil {
+					return err
+				}
+
+				f["filters"] = string(filtersJSON)
+
+				_, err = tx.Where("id", f["id"]).
+					Table("saved_filters").
+					Update(f)
+				if err != nil {
+					return err
+				}
+			}
+
+			return nil
+		},
+		Rollback: func(tx *xorm.Engine) error {
+			return nil
+		},
+	})
+}