Implemented validation of existance of username and chat name on creation

3 files changed, 25 insertions, 0 deletions

diff --git a/go-src/dataValidations.go b/go-src/dataValidations.go
index 34c6f03..5c44e47 100644
--- a/go-src/dataValidations.go
+++ b/go-src/dataValidations.go
@@ -1,7 +1,10 @@
 package ctfc
 
 import (
+	"os"
 	"regexp"
+
+	"gitlab.com/Syndamia/ctfc/go-src/folderPaths"
 )
 
 var SpecialCharacters = []rune{'!', '@', '#', '$', '%', '^', '&', '*'}
@@ -72,3 +75,13 @@ func stringValidChatName(value string) bool {
 func stringValidChatDesc(value string) bool {
 	return stringValidLength(0, 30, value)
 }
+
+func usernameExists(username string) bool {
+	_, err := os.Stat(folderPaths.FileAtUsersFolder(username))
+	return err == nil
+}
+
+func chatNameExists(name string) bool {
+	_, err := os.Stat(folderPaths.FileAtChatsFolder(name))
+	return err == nil
+}
diff --git a/go-src/errorMessages.go b/go-src/errorMessages.go
index 0caf128..103bf41 100644
--- a/go-src/errorMessages.go
+++ b/go-src/errorMessages.go
@@ -9,3 +9,7 @@ const (
 func invalidValueFor(typeName string) string {
 	return "Invalid value for " + typeName + "!"
 }
+
+func valueAlreadyTaken(typeName string) string {
+	return typeName + " is already taken!"
+}
diff --git a/go-src/windows.go b/go-src/windows.go
index 183849e..3bc621c 100644
--- a/go-src/windows.go
+++ b/go-src/windows.go
@@ -54,6 +54,10 @@ func registerWindow(values ...string) {
 	if len(inputs) == 0 {
 		return
 	}
+	if usernameExists(inputs[0]) {
+		defer showError(valueAlreadyTaken("Username"), registerWindow, values...)
+		return
+	}
 
 	createUser(inputs)
 	logInUser(inputs[0], inputs[1])
@@ -92,6 +96,10 @@ func createChatWindow(values ...string) {
 	if len(inputs) == 0 {
 		return
 	}
+	if chatNameExists(inputs[0]) {
+		defer showError(valueAlreadyTaken("Chat name"), createChatWindow, values...)
+		return
+	}
 
 	createChat(inputs[0], inputs[1], loggedInUser.Username)
 	defer chatWindow(inputs[0])