/
persistent_storage_engine.go
58 lines (48 loc) · 1.7 KB
/
persistent_storage_engine.go
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package goadventure
import (
"github.com/peterbourgon/diskv"
"log"
"strconv"
)
type PersistentStorageEngine struct {
tweetStore *diskv.Diskv
gameStateStore *diskv.Diskv
}
func NewPersistentStorageEngine() StorageEngine {
storageEngine := new(PersistentStorageEngine)
// TODO set up a folder structure for < 1k entries per folder
// actual TODO set up a proper datastore
flatTransform := func(s string) []string { return []string{} }
storageEngine.tweetStore = diskv.New(diskv.Options{
BasePath: "storage/tweets",
Transform: flatTransform,
CacheSizeMax: 1024 * 1024,
})
storageEngine.gameStateStore = diskv.New(diskv.Options{
BasePath: "storage/game-states",
Transform: flatTransform,
CacheSizeMax: 1024 * 1024,
})
return storageEngine
}
func (repo *PersistentStorageEngine) GetCurrentSceneKeyForUser(twitterUserId uint64) (string, error) {
rawValue, err := repo.gameStateStore.Read(repo.translateKey(twitterUserId))
if err != nil {
log.Printf("Read \"%v\" as rawValue with \"%v\" as err\n", rawValue, err)
return "", err
}
return string(rawValue), err
}
func (repo *PersistentStorageEngine) SetCurrentSceneKeyForUser(twitterUserId uint64, sceneKey string) {
repo.gameStateStore.Write(repo.translateKey(twitterUserId), []byte(sceneKey))
}
func (repo *PersistentStorageEngine) TweetAlreadyHandled(tweetId uint64) bool {
_, err := repo.tweetStore.Read(repo.translateKey(tweetId))
return err == nil
}
func (repo *PersistentStorageEngine) StoreTweetHandled(tweetId uint64, tweetContents string) {
repo.tweetStore.Write(repo.translateKey(tweetId), []byte(tweetContents))
}
func (_ *PersistentStorageEngine) translateKey(rawKey uint64) string {
return strconv.FormatUint(rawKey, 10)
}