From a49e50fd9e80b50807bfe0e49781d0fb6f5b2451 Mon Sep 17 00:00:00 2001
From: Niko Diamadis <niko@cyb3rko.de>
Date: Sun, 30 Aug 2020 12:50:27 +0200
Subject: [PATCH] =?UTF-8?q?Verhindern=20doppelter=20Eintr=C3=A4ge=20hinzug?=
 =?UTF-8?q?ef=C3=BCgt?=
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---
 .../cyb3rko/techniklogger/ProjectActivity.kt  | 33 ++++++++++++++-----
 1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/app/src/main/java/com/cyb3rko/techniklogger/ProjectActivity.kt b/app/src/main/java/com/cyb3rko/techniklogger/ProjectActivity.kt
index e54056f..178b54f 100644
--- a/app/src/main/java/com/cyb3rko/techniklogger/ProjectActivity.kt
+++ b/app/src/main/java/com/cyb3rko/techniklogger/ProjectActivity.kt
@@ -115,15 +115,32 @@ class ProjectActivity : AppCompatActivity() {
         setValueEventListener("date", date_view)
 
         add_button.setOnClickListener {
-            MaterialDialog(this)
-                .show {
-                    message(0, "Möchtest du dich als involvierter Techniker eintragen?")
-                    positiveButton(0, "Ja") {
-                        val name = getSharedPreferences("Safe", 0).getString("name", "invalid")
-                        databaseReference.child("techniker").push().setValue(name)
-                    }
-                    negativeButton(0, "Abbrechen")
+            val name = getSharedPreferences("Safe", 0).getString("name", "invalid")
+            var existing = false
+
+            for (techniker in techniker) {
+                if (name == techniker.name) {
+                    existing = true
                 }
+            }
+
+            if (!existing) {
+                MaterialDialog(this)
+                    .show {
+                        message(0, "Möchtest du dich als involvierter Techniker eintragen?")
+                        positiveButton(0, "Ja") {
+                            databaseReference.child("techniker").push().setValue(name)
+                        }
+                        negativeButton(0, "Abbrechen")
+                    }
+            } else {
+                MaterialDialog(this)
+                    .show {
+                        title(0, "Fehler")
+                        message(0, "Du bist bereits eingetragen.")
+                        positiveButton(0, "Ok")
+                    }
+            }
         }
 
         emptyCheck()