refactor: cleanup initial impl and modularize everything

client/client.go

@@ -0,0 +1,76 @@
+// gorc project
+// Copyright (C) 2021 IllusionMan1212 and contributors
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, see https://www.gnu.org/licenses.
+
+package client
+
+import (
+	"crypto/tls"
+	"fmt"
+	"log"
+)
+
+type Client struct {
+	// tcp connection
+	conn *tls.Conn
+
+	// channel to receive data that comes through from the connection
+	receive chan string
+}
+
+func NewClient(host string, port string) *Client {
+	// TODO: allow for insecure connections thru a checkbox (needed for irc servers that maybe don't have encryption on)
+	// TODO: distinguish between secure and insecure connections
+	cfg := &tls.Config{ServerName: host}
+	addr := fmt.Sprintf("%s:%s", host, port)
+	conn, err := tls.Dial("tcp", addr, cfg)
+	if err != nil {
+		// TODO: properly handle the error instead of Fatal-ing (failed to initiate a connection to server)
+		log.Fatal(err)
+	}
+
+	// TODO: read nickname and channel from user input (stdin ?? or TUI)
+	conn.Write([]byte("CAP LS\r\n"))
+	// conn.Write([]byte("PASS password"))
+	conn.Write([]byte("NICK illusion434\r\n"))
+	conn.Write([]byte("USER illusion434 0 * :illusion434\r\n"))
+	// TODO: CAP REQ :whatever capability the client recognizes and supports
+	conn.Write([]byte("CAP END\r\n"))
+	conn.Write([]byte("JOIN ##programming\r\n"))
+
+	return &Client{
+		conn:    conn,
+		receive: make(chan string),
+	}
+}
+
+func (c Client) handleCommand(message IRCMessage) {
+	switch message.Command {
+	case "PING":
+		c.conn.Write([]byte("PONG\r\n"))
+		break
+	}
+	// TODO: handle all other commands
+}
+
+func (c Client) Run() {
+	for {
+		select {
+		case line := <-c.receive:
+			messages := parseIRCMessage(line)
+			c.handleCommand(messages)
+		}
+	}
+}