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/members/chat.go

@@ -0,0 +1,126 @@
+package members
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-faster/errors"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/peers"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+)
+
+// ChatMembers is chat Members.
+type ChatMembers struct {
+	m    *peers.Manager
+	chat peers.Chat
+}
+
+func (c *ChatMembers) queryParticipants(ctx context.Context) (*tg.ChatParticipants, error) {
+	full, err := c.chat.FullRaw(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "get full")
+	}
+	switch p := full.Participants.(type) {
+	case *tg.ChatParticipantsForbidden:
+		return nil, &ChatInfoUnavailableError{Info: p}
+	case *tg.ChatParticipants:
+		return p, nil
+	default:
+		return nil, errors.Errorf("unexpected type %T", p)
+	}
+}
+
+// ForEach calls cb for every member of chat.
+//
+// May return ChatInfoUnavailableError.
+func (c *ChatMembers) ForEach(ctx context.Context, cb Callback) error {
+	chatDate := time.Unix(int64(c.chat.Raw().Date), 0)
+	p, err := c.queryParticipants(ctx)
+	if err != nil {
+		return errors.Wrap(err, "query")
+	}
+
+	for i, participant := range p.Participants {
+		userID := participant.GetUserID()
+		user, err := c.m.ResolveUserID(ctx, userID)
+		if err != nil {
+			return errors.Wrapf(err, "get member %d", userID)
+		}
+
+		var inviter peers.User
+		switch p := participant.(type) {
+		case *tg.ChatParticipant:
+			inviter, err = c.m.ResolveUserID(ctx, p.InviterID)
+		case *tg.ChatParticipantAdmin:
+			inviter, err = c.m.ResolveUserID(ctx, p.InviterID)
+		}
+		if err != nil {
+			return errors.Wrap(err, "get inviter")
+		}
+
+		if err := cb(ChatMember{
+			parent:      c,
+			creatorDate: chatDate,
+			user:        user,
+			inviter:     inviter,
+			raw:         participant,
+		}); err != nil {
+			return errors.Wrapf(err, "callback (index: %d)", i)
+		}
+	}
+	return nil
+}
+
+// Count returns total count of members.
+func (c *ChatMembers) Count(ctx context.Context) (int, error) {
+	p, err := c.queryParticipants(ctx)
+	if err != nil {
+		return 0, errors.Wrap(err, "query")
+	}
+	return len(p.Participants), nil
+}
+
+// Peer returns chat object.
+func (c *ChatMembers) Peer() peers.Peer {
+	return c.chat
+}
+
+// Kick kicks user member.
+//
+// If revokeHistory is set, will delete all messages from this member.
+func (c *ChatMembers) Kick(ctx context.Context, member tg.InputUserClass, revokeHistory bool) error {
+	if _, err := c.m.API().MessagesDeleteChatUser(ctx, &tg.MessagesDeleteChatUserRequest{
+		RevokeHistory: revokeHistory,
+		ChatID:        c.chat.ID(),
+		UserID:        member,
+	}); err != nil {
+		return errors.Wrapf(err, "delete user (revoke: %v)", revokeHistory)
+	}
+	return nil
+}
+
+// EditRights edits rights of all members in this chat.
+func (c *ChatMembers) EditRights(ctx context.Context, options MemberRights) error {
+	return editDefaultRights(ctx, c.m.API(), c.chat.InputPeer(), options)
+}
+
+// EditAdmin edits admin rights for given user.
+func (c *ChatMembers) EditAdmin(ctx context.Context, user tg.InputUserClass, isAdmin bool) error {
+	if _, err := c.m.API().MessagesEditChatAdmin(ctx, &tg.MessagesEditChatAdminRequest{
+		ChatID:  c.chat.ID(),
+		UserID:  user,
+		IsAdmin: isAdmin,
+	}); err != nil {
+		return errors.Wrap(err, "edit admin")
+	}
+	return nil
+}
+
+// Chat returns recent chat members.
+func Chat(chat peers.Chat) *ChatMembers {
+	return &ChatMembers{
+		m:    chat.Manager(),
+		chat: chat,
+	}
+}