cae248f672
READ lets downstream clients share information between each other about what messages have been read by other downstreams. Each target/entity has an optional corresponding read receipt, which is stored as a timestamp. - When a downstream sends: READ #chan timestamp=2020-01-01T01:23:45.000Z the read receipt for that target is set to that date - soju sends READ to downstreams: - on JOIN, if the client uses the soju.im/read capability - when the read receipt timestamp is set by any downstream The read receipt date is clamped by the previous receipt date and the current time.
117 lines
3 KiB
Go
117 lines
3 KiB
Go
package soju
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import (
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"context"
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"fmt"
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"strconv"
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"strings"
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"gopkg.in/irc.v3"
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)
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func forwardChannel(ctx context.Context, dc *downstreamConn, ch *upstreamChannel) {
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if !ch.complete {
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panic("Tried to forward a partial channel")
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}
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// RPL_NOTOPIC shouldn't be sent on JOIN
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if ch.Topic != "" {
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sendTopic(dc, ch)
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}
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if dc.caps["soju.im/read"] {
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channelCM := ch.conn.network.casemap(ch.Name)
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r, err := dc.srv.db.GetReadReceipt(ctx, ch.conn.network.ID, channelCM)
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if err != nil {
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dc.logger.Printf("failed to get the read receipt for %q: %v", ch.Name, err)
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} else {
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timestampStr := "*"
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if r != nil {
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timestampStr = fmt.Sprintf("timestamp=%s", r.Timestamp.UTC().Format(serverTimeLayout))
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}
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dc.SendMessage(&irc.Message{
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Prefix: dc.prefix(),
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Command: "READ",
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Params: []string{dc.marshalEntity(ch.conn.network, ch.Name), timestampStr},
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})
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}
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}
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sendNames(dc, ch)
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}
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func sendTopic(dc *downstreamConn, ch *upstreamChannel) {
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downstreamName := dc.marshalEntity(ch.conn.network, ch.Name)
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if ch.Topic != "" {
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: irc.RPL_TOPIC,
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Params: []string{dc.nick, downstreamName, ch.Topic},
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})
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if ch.TopicWho != nil {
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topicWho := dc.marshalUserPrefix(ch.conn.network, ch.TopicWho)
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topicTime := strconv.FormatInt(ch.TopicTime.Unix(), 10)
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: rpl_topicwhotime,
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Params: []string{dc.nick, downstreamName, topicWho.String(), topicTime},
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})
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}
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} else {
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: irc.RPL_NOTOPIC,
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Params: []string{dc.nick, downstreamName, "No topic is set"},
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})
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}
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}
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func sendNames(dc *downstreamConn, ch *upstreamChannel) {
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downstreamName := dc.marshalEntity(ch.conn.network, ch.Name)
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emptyNameReply := &irc.Message{
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Prefix: dc.srv.prefix(),
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Command: irc.RPL_NAMREPLY,
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Params: []string{dc.nick, string(ch.Status), downstreamName, ""},
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}
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maxLength := maxMessageLength - len(emptyNameReply.String())
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var buf strings.Builder
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for _, entry := range ch.Members.innerMap {
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nick := entry.originalKey
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memberships := entry.value.(*memberships)
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s := memberships.Format(dc) + dc.marshalEntity(ch.conn.network, nick)
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n := buf.Len() + 1 + len(s)
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if buf.Len() != 0 && n > maxLength {
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// There's not enough space for the next space + nick.
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: irc.RPL_NAMREPLY,
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Params: []string{dc.nick, string(ch.Status), downstreamName, buf.String()},
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})
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buf.Reset()
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}
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if buf.Len() != 0 {
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buf.WriteByte(' ')
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}
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buf.WriteString(s)
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}
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if buf.Len() != 0 {
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: irc.RPL_NAMREPLY,
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Params: []string{dc.nick, string(ch.Status), downstreamName, buf.String()},
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})
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}
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dc.SendMessage(&irc.Message{
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Prefix: dc.srv.prefix(),
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Command: irc.RPL_ENDOFNAMES,
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Params: []string{dc.nick, downstreamName, "End of /NAMES list"},
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})
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}
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