Added MessagesBefore

category.go

@@ -28,7 +28,7 @@ func NewCategory(s *Session, ch discord.Channel) *Category {
 	}
 }
 
-func (c *Category) ID() string {
+func (c *Category) ID() cchat.ID {
 	return c.id.String()
 }
 

channel.go

@@ -71,6 +71,7 @@ var (
 	_ cchat.ServerNickname               = (*Channel)(nil)
 	_ cchat.ServerMessageEditor          = (*Channel)(nil)
 	_ cchat.ServerMessageActioner        = (*Channel)(nil)
+	_ cchat.ServerMessageBacklogger      = (*Channel)(nil)
 	_ cchat.ServerMessageTypingIndicator = (*Channel)(nil)
 	_ cchat.ServerMessageUnreadIndicator = (*Channel)(nil)
 )
@@ -115,7 +116,7 @@ func (ch *Channel) guild() (*discord.Guild, error) {
 	return nil, errors.New("channel not in a guild")
 }
 
-func (ch *Channel) ID() string {
+func (ch *Channel) ID() cchat.ID {
 	return ch.id.String()
 }
 
@@ -287,6 +288,32 @@ func (ch *Channel) JoinServer(ctx context.Context, ct cchat.MessagesContainer) (
 	return joinCancels(addcancel()), nil
 }
 
+func (ch *Channel) MessagesBefore(ctx context.Context, b cchat.ID, c cchat.MessagePrepender) error {
+	p, err := discord.ParseSnowflake(b)
+	if err != nil {
+		return errors.Wrap(err, "Failed to parse snowflake")
+	}
+
+	s := ch.session.WithContext(ctx)
+
+	m, err := s.MessagesBefore(ch.id, discord.MessageID(p), uint(ch.session.MaxMessages()))
+	if err != nil {
+		return errors.Wrap(err, "Failed to get messages")
+	}
+
+	// Create the backlog without any member information.
+	g, err := s.Guild(ch.guildID)
+	if err != nil {
+		return errors.Wrap(err, "Failed to get guild")
+	}
+
+	for _, m := range m {
+		c.PrependMessage(NewBacklogMessage(m, ch.session, *g))
+	}
+
+	return nil
+}
+
 // MessageEditable returns true if the given message ID belongs to the current
 // user.
 func (ch *Channel) MessageEditable(id string) bool {

channel_memberlist.go

@@ -135,7 +135,7 @@ func NewListMember(ch *Channel, it gateway.GuildMemberListOpItem) *ListMember {
 	}
 }
 
-func (l *ListMember) ID() string {
+func (l *ListMember) ID() cchat.ID {
 	return l.userID.String()
 }
 
@@ -305,7 +305,7 @@ func NewListSection(listID string, ch *Channel, group gateway.GuildMemberListGro
 	}
 }
 
-func (s *ListSection) ID() string {
+func (s *ListSection) ID() cchat.ID {
 	return s.id
 	// return fmt.Sprintf("%s-%s", s.listID, s.name)
 }

go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/diamondburned/arikawa v1.2.0
-	github.com/diamondburned/cchat v0.0.48
+	github.com/diamondburned/cchat v0.0.49
 	github.com/diamondburned/ningen v0.1.1-0.20200818185419-0d3e89f25ee1
 	github.com/dustin/go-humanize v1.0.0
 	github.com/go-test/deep v1.0.6

go.sum

@@ -67,6 +67,8 @@ github.com/diamondburned/cchat v0.0.47 h1:qU2TNeXlqru8za4qAgMPWTw6k8HGGOyic08GPP
 github.com/diamondburned/cchat v0.0.47/go.mod h1:+zXktogE45A0om4fT6B/z6Ii7FXNafjxsNspI0rlhbU=
 github.com/diamondburned/cchat v0.0.48 h1:MAzGzKY20JBh/LnirOZVPwbMq07xfqu4Lb4XsV9/sXQ=
 github.com/diamondburned/cchat v0.0.48/go.mod h1:+zXktogE45A0om4fT6B/z6Ii7FXNafjxsNspI0rlhbU=
+github.com/diamondburned/cchat v0.0.49 h1:zP6QvjdRU3UqDZt3rEqjkR/5M68XRVms7htHfE9tLOc=
+github.com/diamondburned/cchat v0.0.49/go.mod h1:+zXktogE45A0om4fT6B/z6Ii7FXNafjxsNspI0rlhbU=
 github.com/diamondburned/ningen v0.1.1-0.20200621014632-6babb812b249 h1:yP7kJ+xCGpDz6XbcfACJcju4SH1XDPwlrvbofz3lP8I=
 github.com/diamondburned/ningen v0.1.1-0.20200621014632-6babb812b249/go.mod h1:xW9hpBZsGi8KpAh10TyP+YQlYBo+Xc+2w4TR6N0951A=
 github.com/diamondburned/ningen v0.1.1-0.20200708085949-b64e350f3b8c h1:3h/kyk6HplYZF3zLi106itjYJWjbuMK/twijeGLEy2M=

guild.go

@@ -44,7 +44,7 @@ func NewGuildFolder(s *Session, gf gateway.GuildFolder) *GuildFolder {
 	}
 }
 
-func (gf *GuildFolder) ID() string {
+func (gf *GuildFolder) ID() cchat.ID {
 	return strconv.FormatInt(int64(gf.GuildFolder.ID), 10)
 }
 
@@ -115,7 +115,7 @@ func (g *Guild) selfState() (*discord.Guild, error) {
 	return g.session.Store.Guild(g.id)
 }
 
-func (g *Guild) ID() string {
+func (g *Guild) ID() cchat.ID {
 	return g.id.String()
 }
 

message.go

@@ -44,7 +44,7 @@ func NewHeaderDelete(d *gateway.MessageDeleteEvent) messageHeader {
 	}
 }
 
-func (m messageHeader) ID() string {
+func (m messageHeader) ID() cchat.ID {
 	return m.id.String()
 }
 
@@ -125,7 +125,7 @@ func RenderMemberName(m discord.Member, g discord.Guild, s *Session) text.Rich {
 	return name
 }
 
-func (a Author) ID() string {
+func (a Author) ID() cchat.ID {
 	return a.id.String()
 }
 

service.go

@@ -117,7 +117,7 @@ func NewSession(s *state.State) (*Session, error) {
 	}, nil
 }
 
-func (s *Session) ID() string {
+func (s *Session) ID() cchat.ID {
 	return s.userID.String()
 }