From 33e5475c770a9fda9ca98bb9d4d012349e4b5beb Mon Sep 17 00:00:00 2001
From: ilotterytea <iltsu@alright.party>
Date: Sun, 3 Aug 2025 10:32:41 +0500
Subject: feat: join channels

---
 cmd/irclogs/main.go | 10 ++++++----
 internal/client.go  | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 58 insertions(+), 6 deletions(-)

diff --git a/cmd/irclogs/main.go b/cmd/irclogs/main.go
index 509447f..1090e66 100644
--- a/cmd/irclogs/main.go
+++ b/cmd/irclogs/main.go
@@ -22,7 +22,7 @@ func main() {
 	clients := []irclogs.IRCClient{}
 
 	for {
-		rows, err := db.Query("SELECT host, port, nick, pass, capabilities FROM servers")
+		rows, err := db.Query("SELECT id, host, port, nick, pass, capabilities FROM servers")
 		if err != nil {
 			log.Fatalf("Failed to get servers: %v\n", err)
 			continue
@@ -30,8 +30,8 @@ func main() {
 
 		for rows.Next() {
 			var host, nick, pass, caps string
-			var port int
-			if err = rows.Scan(&host, &port, &nick, &pass, &caps); err != nil {
+			var dbid, port int
+			if err = rows.Scan(&dbid, &host, &port, &nick, &pass, &caps); err != nil {
 				log.Fatalf("Failed to scan rows: %v\n", err)
 				continue
 			}
@@ -40,7 +40,7 @@ func main() {
 				return c.Host == host
 			}) {
 				log.Printf("Connecting to %s:%d...\n", host, port)
-				c := irclogs.NewIRCClient(host, port, nick, pass, strings.Split(caps, "\n"))
+				c := irclogs.NewIRCClient(dbid, host, port, nick, pass, strings.Split(caps, "\n"))
 
 				go func() {
 					if err = c.Connect(); err != nil {
@@ -48,6 +48,8 @@ func main() {
 					}
 				}()
 
+				go c.JoinChannels(db)
+
 				clients = append(clients, c)
 			}
 		}
diff --git a/internal/client.go b/internal/client.go
index 092504e..c0373a0 100644
--- a/internal/client.go
+++ b/internal/client.go
@@ -2,24 +2,31 @@ package irclogs
 
 import (
 	"bufio"
+	"database/sql"
 	"fmt"
 	"log"
 	"net"
 	"net/textproto"
+	"slices"
 )
 
 type IRCClient struct {
+	dbid int
+
 	Host string
 	port int
 	nick string
 	pass string
 	caps []string
 
+	rooms []string
+
 	conn net.Conn
 }
 
-func NewIRCClient(host string, port int, nick string, pass string, capabilities []string) IRCClient {
+func NewIRCClient(dbid int, host string, port int, nick string, pass string, capabilities []string) IRCClient {
 	return IRCClient{
+		dbid: dbid,
 		Host: host,
 		port: port,
 		nick: nick,
@@ -36,6 +43,9 @@ func (c *IRCClient) Connect() (err error) {
 
 	c.conn = conn
 	c.authorize()
+	for _, r := range c.rooms {
+		c.SendRaw(fmt.Sprintf("JOIN %s", r))
+	}
 
 	tp := textproto.NewReader(bufio.NewReader(c.conn))
 
@@ -57,5 +67,45 @@ func (c *IRCClient) authorize() {
 }
 
 func (c *IRCClient) SendRaw(message string) {
-	fmt.Fprintf(c.conn, "%s\r\n", message)
+	if c.conn != nil {
+		fmt.Fprintf(c.conn, "%s\r\n", message)
+	}
+}
+
+func (c *IRCClient) JoinChannels(db *sql.DB) {
+	for {
+		rooms := []string{}
+		rows, err := db.Query("SELECT name FROM rooms WHERE server_id = ? AND departed_at IS NULL", c.dbid)
+		if err != nil {
+			log.Fatalf("Failed to get rooms: %v\n", err)
+			continue
+		}
+
+		for rows.Next() {
+			var room string
+			if err = rows.Scan(&room); err != nil {
+				log.Fatalf("Failed to scan rows: %v\n", err)
+				continue
+			}
+			rooms = append(rooms, room)
+		}
+
+		rows.Close()
+
+		for _, r := range rooms {
+			if !slices.Contains(c.rooms, r) {
+				log.Printf("[%s] Joining %s...", c.Host, r)
+				c.SendRaw(fmt.Sprintf("JOIN %s", r))
+				c.rooms = append(c.rooms, r)
+			}
+		}
+
+		for _, r := range c.rooms {
+			if !slices.Contains(rooms, r) {
+				log.Printf("[%s] Departing %s...", c.Host, r)
+				c.SendRaw(fmt.Sprintf("PART %s", r))
+				c.rooms = slices.DeleteFunc(c.rooms, func(s string) bool { return s == r })
+			}
+		}
+	}
 }
-- 
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