mirror of
https://github.com/Luzifer/twitch-bot.git
synced 2024-11-14 02:52:42 +00:00
90 lines
1.6 KiB
Go
90 lines
1.6 KiB
Go
|
package main
|
||
|
|
||
|
import (
|
||
|
"compress/gzip"
|
||
|
"encoding/json"
|
||
|
"os"
|
||
|
"sync"
|
||
|
|
||
|
"github.com/pkg/errors"
|
||
|
)
|
||
|
|
||
|
type storageFile struct {
|
||
|
Counters map[string]int64 `json:"counters"`
|
||
|
|
||
|
lock *sync.RWMutex
|
||
|
}
|
||
|
|
||
|
func newStorageFile() *storageFile {
|
||
|
return &storageFile{
|
||
|
Counters: map[string]int64{},
|
||
|
|
||
|
lock: new(sync.RWMutex),
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func (s *storageFile) GetCounterValue(counter string) int64 {
|
||
|
s.lock.RLock()
|
||
|
defer s.lock.RUnlock()
|
||
|
|
||
|
return s.Counters[counter]
|
||
|
}
|
||
|
|
||
|
func (s *storageFile) Load() error {
|
||
|
s.lock.Lock()
|
||
|
defer s.lock.Unlock()
|
||
|
|
||
|
f, err := os.Open(cfg.StorageFile)
|
||
|
if err != nil {
|
||
|
if os.IsNotExist(err) {
|
||
|
// Store init state
|
||
|
return nil
|
||
|
}
|
||
|
return errors.Wrap(err, "open storage file")
|
||
|
}
|
||
|
defer f.Close()
|
||
|
|
||
|
zf, err := gzip.NewReader(f)
|
||
|
if err != nil {
|
||
|
return errors.Wrap(err, "create gzip reader")
|
||
|
}
|
||
|
defer zf.Close()
|
||
|
|
||
|
return errors.Wrap(
|
||
|
json.NewDecoder(zf).Decode(s),
|
||
|
"decode storage object",
|
||
|
)
|
||
|
}
|
||
|
|
||
|
func (s *storageFile) Save() error {
|
||
|
// NOTE(kahlers): DO NOT LOCK THIS, all calling functions are
|
||
|
// modifying functions and must have locks in place
|
||
|
|
||
|
f, err := os.Create(cfg.StorageFile)
|
||
|
if err != nil {
|
||
|
return errors.Wrap(err, "create storage file")
|
||
|
}
|
||
|
defer f.Close()
|
||
|
|
||
|
zf := gzip.NewWriter(f)
|
||
|
defer zf.Close()
|
||
|
|
||
|
return errors.Wrap(
|
||
|
json.NewEncoder(zf).Encode(s),
|
||
|
"encode storage object",
|
||
|
)
|
||
|
}
|
||
|
|
||
|
func (s *storageFile) UpdateCounter(counter string, value int64, absolute bool) error {
|
||
|
s.lock.Lock()
|
||
|
defer s.lock.Unlock()
|
||
|
|
||
|
if !absolute {
|
||
|
value = s.Counters[counter] + value
|
||
|
}
|
||
|
|
||
|
s.Counters[counter] = value
|
||
|
|
||
|
return errors.Wrap(s.Save(), "saving store")
|
||
|
}
|