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storage/channel.go

@@ -95,6 +95,23 @@ func (c *ChannelStore) SetMode(server, channel, user, add, remove string) {
 	c.userLock.Unlock()
 }
 
+func (c *ChannelStore) FindUserChannels(user, server string) []string {
+	var channels []string
+
+	c.userLock.Lock()
+	for channel, users := range c.users[server] {
+		for _, nick := range users {
+			if user == nick {
+				channels = append(channels, channel)
+				break
+			}
+		}
+	}
+	c.userLock.Unlock()
+
+	return channels
+}
+
 func (c *ChannelStore) GetTopic(server, channel string) string {
 	c.topicLock.Lock()
 	defer c.topicLock.Unlock()

storage/channel_test.go

@@ -57,3 +57,12 @@ func TestTopic(t *testing.T) {
 	channelStore.SetTopic("the topic", "srv", "#chan")
 	assert.Equal(t, "the topic", channelStore.GetTopic("srv", "#chan"))
 }
+
+func TestFindUserChannels(t *testing.T) {
+	channelStore := NewChannelStore()
+	channelStore.AddUser("user", "srv", "#chan1")
+	channelStore.AddUser("user", "srv", "#chan2")
+	channelStore.AddUser("user2", "srv", "#chan3")
+	channelStore.AddUser("user", "srv2", "#chan4")
+	assert.Equal(t, []string{"#chan1", "#chan2"}, channelStore.FindUserChannels("user", "srv"))
+}