mirror of
https://github.com/go-vikunja/vikunja.git
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113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-present Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package keyvalue
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import (
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"code.vikunja.io/api/pkg/config"
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"code.vikunja.io/api/pkg/modules/keyvalue/memory"
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"code.vikunja.io/api/pkg/modules/keyvalue/redis"
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)
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// Storage defines an interface for saving key-value pairs
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type Storage interface {
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Put(key string, value interface{}) (err error)
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Get(key string) (value interface{}, exists bool, err error)
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GetWithValue(key string, value interface{}) (exists bool, err error)
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Del(key string) (err error)
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IncrBy(key string, update int64) (err error)
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DecrBy(key string, update int64) (err error)
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ListKeys(prefix string) ([]string, error)
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DelPrefix(prefix string) error
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}
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var store Storage
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// InitStorage initializes the configured storage backend
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func InitStorage() {
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switch config.KeyvalueType.GetString() {
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case "redis":
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store = redis.NewStorage()
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case "memory":
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fallthrough
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default:
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store = memory.NewStorage()
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}
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}
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// Put puts a value in the storage backend
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func Put(key string, value interface{}) error {
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return store.Put(key, value)
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}
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// Get returns a value from a storage backend
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func Get(key string) (value interface{}, exists bool, err error) {
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return store.Get(key)
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}
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func GetWithValue(key string, value interface{}) (exists bool, err error) {
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return store.GetWithValue(key, value)
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}
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// Del removes a save value from a storage backend
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func Del(key string) (err error) {
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return store.Del(key)
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}
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// IncrBy increases a value at key by the amount in update
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func IncrBy(key string, update int64) (err error) {
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return store.IncrBy(key, update)
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}
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// DecrBy increases a value at key by the amount in update
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func DecrBy(key string, update int64) (err error) {
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return store.DecrBy(key, update)
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}
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// ListKeys returns all keys beginning with prefix from the configured backend
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func ListKeys(prefix string) ([]string, error) {
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return store.ListKeys(prefix)
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}
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// DelPrefix deletes all keys with the given prefix in the backend
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func DelPrefix(prefix string) error {
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return store.DelPrefix(prefix)
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}
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// Remember returns the value for a key if it exists.
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// If the key is not present, it executes fn to calculate the value,
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// stores it and then returns it.
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func Remember(key string, fn func() (any, error)) (any, error) {
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val, exists, err := Get(key)
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if err != nil {
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return nil, err
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}
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if exists {
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return val, nil
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}
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val, err = fn()
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if err != nil {
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return nil, err
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}
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if err := Put(key, val); err != nil {
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return nil, err
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}
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return val, nil
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}
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