Implemented a very hardcoded way for chat message pagination and real time updating

2 files changed, 55 insertions, 5 deletions

diff --git a/go-src/utils/utils.go b/go-src/utils/utils.go
index 754c7ed..c1bd8a4 100644
--- a/go-src/utils/utils.go
+++ b/go-src/utils/utils.go
@@ -1,6 +1,8 @@
 package utils
 
-import "os"
+import (
+	"os"
+)
 
 // Repeats a rune given amount of times and returns the result as a string
 func RepeatRune(r rune, times int) (result string) {
@@ -31,3 +33,11 @@ func AppendToFile(path string, value string) {
 	allChatsFile.WriteString(value)
 	allChatsFile.Close()
 }
+
+func TotalPages(maxSize int, messageAmount int) int {
+	return messageAmount / maxSize
+}
+
+func Paginate(page int, maxSize int, messages ...string) []string {
+	return messages[len(messages)-maxSize*page : len(messages)-maxSize*(page-1)]
+}
diff --git a/go-src/windows.go b/go-src/windows.go
index beac8ed..8e75aa7 100644
--- a/go-src/windows.go
+++ b/go-src/windows.go
@@ -7,8 +7,10 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+	"time"
 
 	"gitlab.com/Syndamia/ctfc/go-src/ui"
+	"gitlab.com/Syndamia/ctfc/go-src/utils"
 )
 
 type window func(...string)
@@ -120,11 +122,35 @@ func chatWindow(values ...string) {
 	ui.NormalBox(true, "Chats", "Direct Messages", "Account", "Logout")
 	ui.TextField(currChat.Name + " : " + currChat.Description)
 	ui.TextField("Brought to you by " + currChat.Owner.Name + " (" + currChat.Owner.Username + ")")
-	ui.EmptyLine()
-	for _, v := range currChat.Messages {
-		ui.TextField(v)
+
+	for i := 0; i <= 15; i++ {
+		ui.EmptyLine()
 	}
-	ui.PageField(0, 0)
+
+	lines := 0
+	lastLine := 0
+	go func() {
+		for lines > -1 {
+			if lastLine == len(currChat.Messages)-1 {
+				currChat = getChat(values[0])
+				continue
+			}
+
+			lastLine = len(currChat.Messages) - 1
+			fmt.Print("\033[s")
+
+			moveCursorUp(15 + 2)
+
+			for _, v := range utils.Paginate(1, 15, currChat.Messages...) {
+				fmt.Print("\033[K")
+				ui.TextField(v)
+			}
+			ui.PageField(1, utils.TotalPages(15, len(currChat.Messages)))
+
+			fmt.Print("\033[u")
+			time.Sleep(500 * time.Millisecond)
+		}
+	}()
 
 	input := ui.InputField("Message or [C/D/A/L/</>/H]")
 
@@ -133,6 +159,7 @@ func chatWindow(values ...string) {
 		currChat.addMessage(strings.TrimPrefix(input, "\\"), loggedInUser.Username)
 		defer chatWindow(values...)
 	}
+	lines = -1
 }
 
 func logoutWindow(...string) {
@@ -245,3 +272,16 @@ func clearScreen() {
 		fmt.Println("\033[2J")
 	}
 }
+
+func moveCursorUp(times int) {
+	fmt.Printf("\033[%vA", times)
+	fmt.Print("\033[E")
+}
+
+func moveCursorDown(times int) {
+	fmt.Printf("\033[%vB", times)
+}
+
+func moveCursorRight(times int) {
+	fmt.Printf("\033[%vC", times)
+}