[PD1] Structured client.

Still need to create crypto object and use it to encrypt messages
Need to create TLS still

Projs/PD1/internal/client/client.go

@@ -1,7 +1,60 @@
 package client
 
-import "fmt"
+import (
+	"PD1/internal/protocol"
+	"PD1/internal/utils/networking"
+	"flag"
+	"fmt"
+)
 
 func Run() {
-    fmt.Println("Client is running...")
+	var userFile string
+	flag.StringVar(&userFile, "user", "userdata.p12", "Specify user data file")
+	flag.Parse()
+
+	if flag.NArg() == 0 {
+		panic("No command provided. Use 'help' for instructions.")
+	}
+
+	command := flag.Arg(0)
+	switch command {
+	case "send":
+		if flag.NArg() < 3 {
+			panic("Insufficient arguments for 'send' command. Usage: send <UID> <SUBJECT>")
+		}
+		uid := flag.Arg(1)
+		subject := flag.Arg(2)
+		// Read message content from stdin
+        messageContent := readMessageContent()
+        cl := networking.NewClient[protocol.Packet]()
+	    defer cl.Connection.Conn.Close()
+        
+        // TODO: cipherSubject := CHAMAR CRYPTO
+        // TODO: cipherBody := CHAMAR CRYPTO
+        submitMessage(cl,uid,cipherSubject,cipherBody)
+
+	case "askqueue":
+	    cl = networking.NewClient[protocol.Packet]()
+	    defer cl.Connection.Conn.Close()
+
+	case "getmsg":
+		if flag.NArg() < 2 {
+			panic("Insufficient arguments for 'getmsg' command. Usage: getmsg <NUM>")
+		}
+		num := flag.Arg(1)
+	    cl = networking.NewClient[protocol.Packet]()
+	    defer cl.Connection.Conn.Close()
+
+	case "help":
+        showHelp()
+
+	default:
+		fmt.Println("Invalid command. Use 'help' for instructions.")
+	}
+
+}
+
+func submitMessage(cl networking.Client[protocol.Packet],uid string,subject []byte,body []byte) {
+    pack := protocol.NewSubmitMessage(uid, subject, body)
+	cl.Connection.Send(pack)
 }