[PD1] Cleaned up protocol,database and receiving multiple messageInfos

Projs/PD1/internal/client/interface.go

@@ -4,10 +4,11 @@ import (
 	"bufio"
 	"fmt"
 	"os"
+	"strings"
 )
 
-func readMessageBody() string {
-	fmt.Println("Enter message content (limited to 1000 bytes):")
+func readStdin(message string) string {
+	fmt.Println(message)
 	scanner := bufio.NewScanner(os.Stdin)
 	scanner.Scan()
 	// FIX: make sure this doesnt die
@@ -36,15 +37,63 @@ func showHelp() {
 	fmt.Println("help: Imprime instruções de uso do programa.")
 }
 
-func showMessagesInfo(messages []ClientMessageInfo) {
+func showMessagesInfo(page int, numPages int, messages []ClientMessageInfo) int {
+	if messages == nil {
+		fmt.Println("No unread messages in the queue")
+		return 0
+	}
 	for _, message := range messages {
 		fmt.Printf("%v:%v:%v:%v\n", message.Num, message.FromUID, message.Timestamp, message.Subject)
 	}
+    fmt.Printf("Page %v/%v\n",page,numPages)
+	return messagesInfoPageNavigation(page, numPages)
 }
 
-func showMessage(message ClientMessage) {
-	fmt.Printf("From:%v\n", message.FromUID)
-	fmt.Printf("To:%v\n", message.ToUID)
-	fmt.Printf("Subject:%v\n", message.Subject)
-	fmt.Printf("Body:%v\n", message.Body)
+func messagesInfoPageNavigation(page int, numPages int) int {
+	var action string
+
+	switch page {
+	case 1:
+		if page == numPages {
+			action = readStdin("Actions: quit")
+		} else {
+			action = readStdin("Actions: quit/next")
+		}
+	case numPages:
+		action = readStdin("Actions: prev/quit")
+	default:
+		action = readStdin("prev/quit/next")
+	}
+
+	switch strings.ToLower(action) {
+	case "prev":
+		if page == 1 {
+			fmt.Println("Unavailable action: Already in first page")
+			messagesInfoPageNavigation(page, numPages)
+		} else {
+			return -1
+		}
+	case "quit":
+		return 0
+	case "next":
+		if page == numPages {
+			fmt.Println("Unavailable action: Already in last page")
+			messagesInfoPageNavigation(page, numPages)
+		} else {
+			return 1
+		}
+	default:
+		fmt.Println("Unknown action")
+		messagesInfoPageNavigation(page, numPages)
+	}
+	return 0
 }
+
+
+func showMessage(message ClientMessage) {
+	fmt.Printf("From: %s\n", message.FromUID)
+	fmt.Printf("To: %s\n", message.ToUID)
+	fmt.Printf("Subject: %s\n", message.Subject)
+	fmt.Printf("Body: %s\n", message.Body)
+}
+