Sergiusz Bazanski | a885488 | 2020-01-05 00:34:38 +0100 | [diff] [blame] | 1 | package irc |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | |
| 7 | "github.com/golang/glog" |
| 8 | ) |
| 9 | |
| 10 | // Control: send a message to IRC. |
| 11 | func (m *Manager) SendMessage(user, text string) error { |
| 12 | done := make(chan error) |
| 13 | m.ctrl <- &control{ |
| 14 | message: &controlMessage{ |
| 15 | from: user, |
| 16 | message: text, |
| 17 | done: done, |
| 18 | }, |
| 19 | } |
| 20 | return <-done |
| 21 | } |
| 22 | |
| 23 | // Control: subscribe to notifiactions. |
| 24 | func (m *Manager) Subscribe(c chan *Notification) { |
| 25 | m.ctrl <- &control{ |
| 26 | subscribe: &controlSubscribe{ |
| 27 | c: c, |
| 28 | }, |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | // control message from owner. Only one member can be set. |
| 33 | type control struct { |
| 34 | // message needs to be send to IRC |
| 35 | message *controlMessage |
| 36 | // a new subscription channel for notifications is presented |
| 37 | subscribe *controlSubscribe |
| 38 | } |
| 39 | |
| 40 | // controlMessage is a request to send a message to IRC as a given user |
| 41 | type controlMessage struct { |
| 42 | // user name (native to application) |
| 43 | from string |
| 44 | // plaintext message |
| 45 | message string |
| 46 | // channel that will be sent nil or an error when the message has been |
| 47 | // succesfully sent or an error occured |
| 48 | done chan error |
| 49 | } |
| 50 | |
| 51 | // controlSubscribe is a request to send notifications to a given channel |
| 52 | type controlSubscribe struct { |
| 53 | c chan *Notification |
| 54 | } |
| 55 | |
| 56 | // doctrl processes a given control message. |
| 57 | func (m *Manager) doctrl(ctx context.Context, c *control) { |
| 58 | switch { |
| 59 | |
| 60 | case c.message != nil: |
| 61 | // Send a message to IRC. |
| 62 | |
| 63 | // Find a relevant connection, or make one. |
| 64 | conn, err := m.getconn(ctx, c.message.from) |
| 65 | if err != nil { |
| 66 | // Do not attempt to redeliver bans. |
| 67 | if err == errBanned { |
| 68 | c.message.done <- nil |
| 69 | } else { |
| 70 | c.message.done <- fmt.Errorf("getting connection: %v", err) |
| 71 | } |
| 72 | return |
| 73 | } |
| 74 | |
| 75 | // Route message to connection. |
| 76 | conn.Say(c.message) |
| 77 | |
| 78 | case c.subscribe != nil: |
| 79 | // Subscribe to notifications. |
| 80 | m.subscribers[c.subscribe.c] = true |
| 81 | |
| 82 | default: |
| 83 | glog.Errorf("unhandled control %+v", c) |
| 84 | } |
| 85 | } |