Fix races conditions

Refactor:
- Split out reads/writes from irc.Session to irc.ChanInOut,
- Message handling is now manual, messages must be passed to
  irc.Session.HandleMessage for its state to change,
- Remove data-race-prone App.addLineNow (called from both the main
  eventLoop and irc loops) and add App.addStatusLine (to be called from
  the main event loop) and App.queueStatusLine (to be called from other
  goroutines).  These two functions now write to both the current buffer
  and the home buffer,
- add a irc.Typings.List function that locks the list of typings before
  accessing it.

Changes as I went through the whole code...
- CAP handling is fixed (especially CAP DEL and CAP ACK),
- irc.Session now handles PREFIX,
- unhandled messages are now shown, except for some rare cases where
  it's completely useless to show them.

1 files changed, 6 insertions, 29 deletions

diff --git a/irc/events.go b/irc/events.go
index a241232..bdd6914 100644
--- a/irc/events.go
+++ b/irc/events.go
@@ -1,17 +1,9 @@
 package irc
 
-import (
-	"time"
-)
+import "time"
 
 type Event interface{}
 
-type RawMessageEvent struct {
-	Message  string
-	Outgoing bool
-	IsValid  bool
-}
-
 type ErrorEvent struct {
 	Severity Severity
 	Code     string
@@ -22,13 +14,11 @@ type RegisteredEvent struct{}
 
 type SelfNickEvent struct {
 	FormerNick string
-	Time       time.Time
 }
 
 type UserNickEvent struct {
-	User       *Prefix
+	User       string
 	FormerNick string
-	Time       time.Time
 }
 
 type SelfJoinEvent struct {
@@ -36,9 +26,8 @@ type SelfJoinEvent struct {
 }
 
 type UserJoinEvent struct {
-	User    *Prefix
+	User    string
 	Channel string
-	Time    time.Time
 }
 
 type SelfPartEvent struct {
@@ -46,26 +35,22 @@ type SelfPartEvent struct {
 }
 
 type UserPartEvent struct {
-	User    *Prefix
+	User    string
 	Channel string
-	Time    time.Time
 }
 
 type UserQuitEvent struct {
-	User     *Prefix
+	User     string
 	Channels []string
-	Time     time.Time
 }
 
 type TopicChangeEvent struct {
-	User    *Prefix
 	Channel string
 	Topic   string
-	Time    time.Time
 }
 
 type MessageEvent struct {
-	User            *Prefix
+	User            string
 	Target          string
 	TargetIsChannel bool
 	Command         string
@@ -73,14 +58,6 @@ type MessageEvent struct {
 	Time            time.Time
 }
 
-type TagEvent struct {
-	User            *Prefix
-	Target          string
-	TargetIsChannel bool
-	Typing          int
-	Time            time.Time
-}
-
 type HistoryEvent struct {
 	Target   string
 	Messages []Event