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storages.go
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storages.go
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/*
WebChunk, web server for block game maps
Copyright (C) 2022 Maxim Zhuchkov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License 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 License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Contact me via mail: [email protected] or Discord: MaX#6717
*/
package main
import (
"context"
"errors"
"log"
"sync"
"github.com/maxsupermanhd/WebChunk/chunkStorage"
"github.com/maxsupermanhd/WebChunk/chunkStorage/filesystemChunkStorage"
"github.com/maxsupermanhd/WebChunk/chunkStorage/postgresChunkStorage"
"github.com/maxsupermanhd/lac"
)
var (
errStorageTypeNotImplemented = errors.New("storage type not implemented")
storages map[string]chunkStorage.Storage
storagesLock sync.Mutex
)
func storagesInit() error {
log.Println("Initializing storages...")
err := cfg.GetToStruct(&storages, "storages")
if err != nil && !errors.Is(err, lac.ErrNoKey) {
return err
}
if len(storages) == 0 {
log.Println("No storages to initialize")
cfg.Set(map[string]any{}, "storages")
return nil
}
for k, v := range storages {
d, err := newStorage(storages[k].Type, storages[k].Address)
if err != nil {
log.Println("Failed to initialize storage: " + err.Error())
continue
}
ver, err := d.GetStatus()
if err != nil {
log.Println("Error getting storage status: " + err.Error())
continue
}
v.Driver = d
storages[k] = v
log.Println("Storage initialized: " + ver)
}
return nil
}
func newStorage(storageStype, address string) (driver chunkStorage.ChunkStorage, err error) {
switch storageStype {
case "postgres":
driver, err = postgresChunkStorage.NewPostgresChunkStorage(context.Background(), address)
if err != nil {
return nil, err
}
return driver, nil
case "filesystem":
driver, err = filesystemChunkStorage.NewFilesystemChunkStorage(address)
if err != nil {
return nil, err
}
return driver, nil
default:
return nil, errStorageTypeNotImplemented
}
}
func findCapableStorage(storages map[string]chunkStorage.Storage, pref string) chunkStorage.ChunkStorage {
p, ok := storages[pref]
if ok {
return p.Driver
}
for sn, s := range storages {
if s.Driver == nil || sn == "" {
continue
}
a := s.Driver.GetAbilities()
if a.CanCreateWorldsDimensions && a.CanAddChunks {
return s.Driver
}
}
return nil
}
func listNamesWnD() map[string][]string {
worlds := map[string][]string{}
storagesLock.Lock()
defer storagesLock.Unlock()
for _, storage := range storages {
if storage.Driver == nil {
continue
}
dims, err := storage.Driver.ListDimensions()
if err != nil {
log.Println(err)
continue
}
for _, d := range dims {
world, ok := worlds[d.World]
if ok {
world = append(world, d.Name)
} else {
world = []string{d.Name}
}
worlds[d.World] = world
}
}
return worlds
}