Merge pull request #1 from Shingyx/mac-address-dialog-colons

Auto insert MAC addr colons in dialog

wakeonlan/src/main/java/com/github/shingyx/wakeonlan/ui/MacAddressTextWatcher.kt

@@ -0,0 +1,40 @@
+package com.github.shingyx.wakeonlan.ui
+
+import android.text.Editable
+import android.text.TextWatcher
+
+class MacAddressTextWatcher : TextWatcher {
+    private var previousText: String = ""
+
+    override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
+        previousText = s.toString()
+    }
+
+    override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {}
+
+    override fun afterTextChanged(editable: Editable) {
+        val text = editable.toString()
+        val formattedText = formatMacAddress(text)
+        if (formattedText != text) {
+            editable.replace(0, editable.length, formattedText)
+        }
+    }
+
+    private fun formatMacAddress(text: String): String {
+        val builder = StringBuilder()
+        var digits = 0
+        for (char in text) {
+            if (char.isLetterOrDigit()) {
+                if (digits % 2 == 0 && digits > 0 && digits < 12) {
+                    builder.append(':')
+                }
+                builder.append(char)
+                digits++
+            }
+        }
+        if (text.lastOrNull() == ':') {
+            builder.append(':')
+        }
+        return builder.toString()
+    }
+}

wakeonlan/src/main/java/com/github/shingyx/wakeonlan/ui/MainActivity.kt

@@ -15,11 +15,15 @@ import com.github.shingyx.wakeonlan.data.Host
 import com.github.shingyx.wakeonlan.data.WifiAddresses
 import com.github.shingyx.wakeonlan.data.isMacAddressValid
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
-import kotlinx.android.synthetic.main.activity_main.*
+import kotlinx.android.synthetic.main.activity_main.configure
+import kotlinx.android.synthetic.main.activity_main.mac_address
+import kotlinx.android.synthetic.main.activity_main.name
+import kotlinx.android.synthetic.main.activity_main.progress
+import kotlinx.android.synthetic.main.activity_main.ssid
+import kotlinx.android.synthetic.main.activity_main.turn_on
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.launch
-import java.lang.Exception
 
 class MainActivity : AppCompatActivity() {
     private val scope = MainScope()
@@ -91,7 +95,9 @@ class MainActivity : AppCompatActivity() {
 
         val view = layoutInflater.inflate(R.layout.dialog_host, null)
         val nameField = view.findViewById<EditText>(R.id.edit_name)
-        val macAddressField = view.findViewById<EditText>(R.id.edit_mac_address)
+        val macAddressField = view.findViewById<EditText>(R.id.edit_mac_address).apply {
+            addTextChangedListener(MacAddressTextWatcher())
+        }
         model.host.value?.let {
             nameField.setText(it.name)
             macAddressField.setText(it.macAddress)