move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/peers/storage.go

@@ -0,0 +1,119 @@
+package peers
+
+import (
+	"context"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+// Value is storage value.
+type Value struct {
+	AccessHash int64
+}
+
+// Key is storage key.
+type Key struct {
+	Prefix string
+	ID     int64
+}
+
+// Storage is peer storage.
+type Storage interface {
+	Save(ctx context.Context, key Key, value Value) error
+	Find(ctx context.Context, key Key) (value Value, found bool, _ error)
+
+	SavePhone(ctx context.Context, phone string, key Key) error
+	FindPhone(ctx context.Context, phone string) (key Key, value Value, found bool, err error)
+
+	GetContactsHash(ctx context.Context) (int64, error)
+	SaveContactsHash(ctx context.Context, hash int64) error
+}
+
+const (
+	usersPrefix   = "users_"
+	chatsPrefix   = "chats_"
+	channelPrefix = "channel_"
+)
+
+// Cache is peer entities cache.
+type Cache interface {
+	SaveUsers(ctx context.Context, users ...*tg.User) error
+	SaveUserFulls(ctx context.Context, users ...*tg.UserFull) error
+	FindUser(ctx context.Context, id int64) (*tg.User, bool, error)
+	FindUserFull(ctx context.Context, id int64) (*tg.UserFull, bool, error)
+
+	SaveChats(ctx context.Context, chats ...*tg.Chat) error
+	SaveChatFulls(ctx context.Context, chats ...*tg.ChatFull) error
+	FindChat(ctx context.Context, id int64) (*tg.Chat, bool, error)
+	FindChatFull(ctx context.Context, id int64) (*tg.ChatFull, bool, error)
+
+	SaveChannels(ctx context.Context, channels ...*tg.Channel) error
+	SaveChannelFulls(ctx context.Context, channels ...*tg.ChannelFull) error
+	FindChannel(ctx context.Context, id int64) (*tg.Channel, bool, error)
+	FindChannelFull(ctx context.Context, id int64) (*tg.ChannelFull, bool, error)
+}
+
+// NoopCache is no-op implementation of Cache.
+type NoopCache struct{}
+
+var _ Cache = NoopCache{}
+
+// SaveUsers implements Cache.
+func (n NoopCache) SaveUsers(ctx context.Context, users ...*tg.User) error {
+	return nil
+}
+
+// SaveUserFulls implements Cache.
+func (n NoopCache) SaveUserFulls(ctx context.Context, users ...*tg.UserFull) error {
+	return nil
+}
+
+// FindUser implements Cache.
+func (n NoopCache) FindUser(ctx context.Context, id int64) (*tg.User, bool, error) {
+	return nil, false, nil
+}
+
+// FindUserFull implements Cache.
+func (n NoopCache) FindUserFull(ctx context.Context, id int64) (*tg.UserFull, bool, error) {
+	return nil, false, nil
+}
+
+// SaveChats implements Cache.
+func (n NoopCache) SaveChats(ctx context.Context, chats ...*tg.Chat) error {
+	return nil
+}
+
+// SaveChatFulls implements Cache.
+func (n NoopCache) SaveChatFulls(ctx context.Context, chats ...*tg.ChatFull) error {
+	return nil
+}
+
+// FindChat implements Cache.
+func (n NoopCache) FindChat(ctx context.Context, id int64) (*tg.Chat, bool, error) {
+	return nil, false, nil
+}
+
+// FindChatFull implements Cache.
+func (n NoopCache) FindChatFull(ctx context.Context, id int64) (*tg.ChatFull, bool, error) {
+	return nil, false, nil
+}
+
+// SaveChannels implements Cache.
+func (n NoopCache) SaveChannels(ctx context.Context, channels ...*tg.Channel) error {
+	return nil
+}
+
+// SaveChannelFulls implements Cache.
+func (n NoopCache) SaveChannelFulls(ctx context.Context, channels ...*tg.ChannelFull) error {
+	return nil
+}
+
+// FindChannel implements Cache.
+func (n NoopCache) FindChannel(ctx context.Context, id int64) (*tg.Channel, bool, error) {
+	return nil, false, nil
+}
+
+// FindChannelFull implements Cache.
+func (n NoopCache) FindChannelFull(ctx context.Context, id int64) (*tg.ChannelFull, bool, error) {
+	return nil, false, nil
+}