feat: BIG changes

* use commands constants
* use a separate goroutine to read from connection
* refactor connection reading and ui updating
* add sidepanel for users in channel
* other cleanups

client/client.go

@@ -24,12 +24,35 @@ import (
 	"strings"
 )
 
-type Client struct {
-	// tls connection
-	TlsConn *tls.Conn
+type User struct {
+	// Nickname of user
+	Nick string
+}
 
+type Channel struct {
+	// Channel topic
+	Topic string
+
+	// Channel messages history
+	History string
+
+	// Users in this channel
+	Users []User
+}
+
+type Client struct {
 	// tcp connection
-	TcpConn *net.TCPConn
+	TcpConn net.Conn
+
+	// Channel to receive quit msg
+	Quit chan struct{}
+
+	Host          string
+	Port          string
+	Nickname      string
+	MOTD          string             // TODO:
+	Channels      map[string]Channel // TODO:
+	ActiveChannel string
 }
 
 const CRLF = "\r\n"
@@ -46,8 +69,12 @@ func NewClient(host string, port string, tlsEnabled bool) Client {
 		}
 
 		return Client{
-			TlsConn: conn,
-			TcpConn: nil,
+			TcpConn:       conn,
+			Host:          host,
+			Port:          port,
+			Quit:          make(chan struct{}),
+			ActiveChannel: host,
+			Channels:      make(map[string]Channel),
 		}
 	}
 
@@ -62,27 +89,39 @@ func NewClient(host string, port string, tlsEnabled bool) Client {
 	}
 
 	return Client{
-		TlsConn: nil,
-		TcpConn: conn,
+		TcpConn:       conn,
+		Host:          host,
+		Port:          port,
+		Quit:          make(chan struct{}),
+		ActiveChannel: host,
+		Channels:      make(map[string]Channel),
 	}
 }
 
-func (c Client) Register(nick string, password string, channel string) {
+func (c *Client) Register(nick string, password string, channel string) {
 	c.SendCommand("CAP", "LS")
 	if password != "" {
 		c.SendCommand("PASS", password)
 	}
 	// TODO: check if nickname has spaces and remove them
 	c.SendCommand("NICK", nick)
+	c.Nickname = nick
 	c.SendCommand("USER", nick, "0", "*", nick)
 	// TODO: CAP REQ :whatever capability the client recognizes and supports
 	c.SendCommand("CAP", "REQ", ":message-tags")
 	c.SendCommand("CAP", "END")
-	c.SendCommand("JOIN", channel)
+	// joining a channel when registering is optional
+	if channel != "" {
+		c.SendCommand("JOIN", channel)
+		c.ActiveChannel = channel
+		c.Channels[c.ActiveChannel] = Channel{}
+	} else {
+		c.Channels[c.ActiveChannel] = Channel{}
+	}
 }
 
 func (c Client) SendCommand(cmd string, params ...string) {
-	if c.TlsConn == nil && c.TcpConn == nil {
+	if c.TcpConn == nil {
 		// TODO: properly handle the error instead of Fatal-ing
 		log.Fatal("Attempted to write data to nil connection")
 	}
@@ -103,8 +142,8 @@ func (c Client) SendCommand(cmd string, params ...string) {
 		paramsString = " " + strings.Join(params[:len(params)-1], " ")
 		paramsString += lastParam
 
-		// if we have exactly 1 param
-	} else if len(params) == 1 {
+		// if we have exactly 1 param and it's not empty
+	} else if len(params) == 1 && params[0] != "" {
 		// if this 1 param contains spaces, we prepend a colon
 		if strings.Contains(params[0], " ") {
 			paramsString = " :" + params[0]
@@ -113,9 +152,7 @@ func (c Client) SendCommand(cmd string, params ...string) {
 		}
 	}
 
-	if c.TlsConn != nil {
-		c.TlsConn.Write([]byte(cmd + paramsString + CRLF))
-	} else if c.TcpConn != nil {
+	if c.TcpConn != nil {
 		c.TcpConn.Write([]byte(cmd + paramsString + CRLF))
 	} else {
 		// TODO: properly handle the error instead of Fatal-ing