twitch-bot/store.go
Knut Ahlers 78beeaa14b
[core] Add handling for channel point rewards
Signed-off-by: Knut Ahlers <knut@ahlers.me>
2021-12-25 00:53:54 +01:00

288 lines
5.9 KiB
Go

package main
import (
"compress/gzip"
"crypto/rand"
"encoding/hex"
"encoding/json"
"os"
"sync"
"time"
"github.com/pkg/errors"
"github.com/Luzifer/go_helpers/v2/str"
"github.com/Luzifer/twitch-bot/plugins"
)
const eventSubSecretLength = 32
type storageFile struct {
Counters map[string]int64 `json:"counters"`
Timers map[string]plugins.TimerEntry `json:"timers"`
Variables map[string]string `json:"variables"`
ModuleStorage map[string]json.RawMessage `json:"module_storage"`
GrantedScopes map[string][]string `json:"granted_scopes"`
EventSubSecret string `json:"event_sub_secret,omitempty"`
inMem bool
lock *sync.RWMutex
}
func newStorageFile(inMemStore bool) *storageFile {
return &storageFile{
Counters: map[string]int64{},
Timers: map[string]plugins.TimerEntry{},
Variables: map[string]string{},
ModuleStorage: map[string]json.RawMessage{},
GrantedScopes: map[string][]string{},
inMem: inMemStore,
lock: new(sync.RWMutex),
}
}
func (s *storageFile) DeleteGrantedScopes(user string) error {
s.lock.Lock()
defer s.lock.Unlock()
delete(s.GrantedScopes, user)
return errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) DeleteModuleStore(moduleUUID string) error {
s.lock.Lock()
defer s.lock.Unlock()
delete(s.ModuleStorage, moduleUUID)
return errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) GetCounterValue(counter string) int64 {
s.lock.RLock()
defer s.lock.RUnlock()
return s.Counters[counter]
}
func (s *storageFile) GetOrGenerateEventSubSecret() (string, string, error) {
s.lock.Lock()
defer s.lock.Unlock()
if s.EventSubSecret != "" {
return s.EventSubSecret, s.EventSubSecret[:5], nil
}
key := make([]byte, eventSubSecretLength)
n, err := rand.Read(key)
if err != nil {
return "", "", errors.Wrap(err, "generating random secret")
}
if n != eventSubSecretLength {
return "", "", errors.Errorf("read only %d of %d byte", n, eventSubSecretLength)
}
s.EventSubSecret = hex.EncodeToString(key)
return s.EventSubSecret, s.EventSubSecret[:5], errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) GetModuleStore(moduleUUID string, storedObject plugins.StorageUnmarshaller) error {
s.lock.RLock()
defer s.lock.RUnlock()
return errors.Wrap(
storedObject.UnmarshalStoredObject(s.ModuleStorage[moduleUUID]),
"unmarshalling stored object",
)
}
func (s *storageFile) GetVariable(key string) string {
s.lock.RLock()
defer s.lock.RUnlock()
return s.Variables[key]
}
func (s *storageFile) HasTimer(id string) bool {
s.lock.RLock()
defer s.lock.RUnlock()
return s.Timers[id].Time.After(time.Now())
}
func (s *storageFile) Load() error {
s.lock.Lock()
defer s.lock.Unlock()
if s.inMem {
// In-Memory store is active, do not load from disk
// for testing purposes only!
return nil
}
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
if s.inMem {
// In-Memory store is active, do not store to disk
// for testing purposes only!
return nil
}
// Cleanup timers
var timerIDs []string
for id := range s.Timers {
timerIDs = append(timerIDs, id)
}
for _, i := range timerIDs {
if s.Timers[i].Time.Before(time.Now()) {
delete(s.Timers, i)
}
}
// Write store to disk
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) SetGrantedScopes(user string, scopes []string) error {
s.lock.Lock()
defer s.lock.Unlock()
s.GrantedScopes[user] = scopes
return errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) SetModuleStore(moduleUUID string, storedObject plugins.StorageMarshaller) error {
s.lock.Lock()
defer s.lock.Unlock()
data, err := storedObject.MarshalStoredObject()
if err != nil {
return errors.Wrap(err, "marshalling stored object")
}
s.ModuleStorage[moduleUUID] = data
return errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) SetTimer(kind plugins.TimerType, id string, expiry time.Time) error {
s.lock.Lock()
defer s.lock.Unlock()
s.Timers[id] = plugins.TimerEntry{Kind: kind, Time: expiry}
return errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) SetVariable(key, value string) error {
s.lock.Lock()
defer s.lock.Unlock()
s.Variables[key] = value
return errors.Wrap(s.Save(), "saving store")
}
func (s *storageFile) RemoveVariable(key string) error {
s.lock.Lock()
defer s.lock.Unlock()
delete(s.Variables, key)
return errors.Wrap(s.Save(), "saving store")
}
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")
}
func (s *storageFile) UserHasGrantedAnyScope(user string, scopes ...string) bool {
s.lock.RLock()
defer s.lock.RUnlock()
grantedScopes, ok := s.GrantedScopes[user]
if !ok {
return false
}
for _, scope := range scopes {
if str.StringInSlice(scope, grantedScopes) {
return true
}
}
return false
}
func (s *storageFile) UserHasGrantedScopes(user string, scopes ...string) bool {
s.lock.RLock()
defer s.lock.RUnlock()
grantedScopes, ok := s.GrantedScopes[user]
if !ok {
return false
}
for _, scope := range scopes {
if !str.StringInSlice(scope, grantedScopes) {
return false
}
}
return true
}