2FA codes can now be scanned.

app/src/main/java/com/github/mondei1/offpass/CreateActivity.kt

@@ -1,25 +1,42 @@
 package com.github.mondei1.offpass
 
+import android.animation.ObjectAnimator
+import android.annotation.SuppressLint
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.Intent
+import android.content.res.ColorStateList
+import android.graphics.Color
+import android.graphics.ColorFilter
+import android.net.Uri
 import android.os.Bundle
+import android.text.Editable
 import android.util.Log
+import android.view.View
+import android.view.animation.LinearInterpolator
+import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import com.google.zxing.integration.android.IntentIntegrator
+import com.google.zxing.integration.android.IntentResult
+import dev.turingcomplete.kotlinonetimepassword.GoogleAuthenticator
 import kotlinx.android.synthetic.main.activity_create.*
+import kotlinx.coroutines.*
+import java.text.DateFormat
+import java.text.SimpleDateFormat
+import java.util.*
 
 class CreateActivity : AppCompatActivity() {
     private var fragment_title: TextInput? = null
     private var fragment_username: TextInput? = null
     private var schema: QRSchema? = null
 
+    private var fa_coroutine: Job? = null
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        fragment_title = TextInput.newInstance("Title", "ENTER TITLE", "30dp")
-        fragment_username = TextInput.newInstance("Username", "ENTER USERNAME", "30dp")
-        supportFragmentManager.beginTransaction()
-            .replace(R.id.title_box, fragment_title!!)
-            .replace(R.id.username, fragment_username!!)
-            .commit()
-
         //this.schema = QRSchema(this)
         //this.schema!!.decrypted_raw = "%JtuB4O9M42%Gitea|Nicolas|542superGoOD_pW&|klier.nicolas@protonmail.com|\$ul|(\$vb)\$O4|()What's your favorite series%Rick and morty|(2fa)otpauth://totp/OffPass%20Test?secret=d34gfkki5dkd5knifysrpgndd5xb2c7eddwki7ya4pvoisfa5c3ko5pv&issuer=Nicolas%20Klier"
         //this.schema!!.parse(this)
@@ -34,6 +51,80 @@ class CreateActivity : AppCompatActivity() {
             Log.i("CREATE", "Back got clicked!")
             finish()
         }
+
+        fa_input.isFocusable = false
+
+        fa_input.setOnClickListener {
+            if (fa_coroutine != null) {
+                if (fa_coroutine!!.isActive) {
+                    // Copy code if already scanend
+                    Toast.makeText(this, "Copied!", Toast.LENGTH_SHORT).show()
+                    val clip: ClipboardManager = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+                    clip.setPrimaryClip(ClipData.newPlainText("2FA code", fa_input.text))
+                    return@setOnClickListener
+                }
+            }
+
+            // Open QR-Code scanner
+            IntentIntegrator(this)
+                .setPrompt("Scan 2FA secret")
+                .setBeepEnabled(false)
+                .setBarcodeImageEnabled(false)
+                .initiateScan()
+        }
+    }
+
+    @SuppressLint("SimpleDateFormat", "SetTextI18n")
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        var result: IntentResult =
+            IntentIntegrator.parseActivityResult(requestCode, resultCode, data)
+        if (result.contents == null) {
+            Toast.makeText(this, "Cancelled", Toast.LENGTH_LONG).show()
+        } else {
+            // We scanned a 2FA code
+            if (result.contents.startsWith("otpauth://totp/")) {
+                fa_progress.visibility = View.VISIBLE
+                val fa_uri = Uri.parse(result.contents)
+                val fa_generator = GoogleAuthenticator(base32secret = fa_uri.getQueryParameter("secret").toString())
+
+                /*val objAnim: ObjectAnimator = ObjectAnimator.ofInt(fa_progress, "progress")
+                objAnim.duration = 300
+                objAnim.interpolator = LinearInterpolator()
+                objAnim.start()*/
+
+                // TODO: There is a bug. When the user changes his current app, this coroutine stops.
+                fa_coroutine = GlobalScope.launch(Dispatchers.Main) {
+                    while (true) {
+                        fa_input.setText(fa_generator.generate())
+
+                        var seconds_remaining = CryptoOperations().getRemainingTOTPTime()
+                        Log.i("2FA Generator", "Remaining: $seconds_remaining")
+
+                        if (seconds_remaining == 0) seconds_remaining = 30
+
+                        // Change color
+                        if (seconds_remaining >= 15) {
+                            fa_progress.progressTintList = ColorStateList.valueOf(Color.GREEN)
+                        } else if (seconds_remaining < 15 && seconds_remaining >= 8) {
+                            fa_progress.progressTintList = ColorStateList.valueOf(Color.YELLOW)
+                        } else {
+                            fa_progress.progressTintList = ColorStateList.valueOf(Color.RED)
+                        }
+
+                        fa_progress.progress = seconds_remaining
+                        delay(1000)
+                    }
+                }
+
+                fa_label.text = "${fa_uri.path?.replace("/", "")} (${fa_uri.getQueryParameter("issuer")})"
+            }
+        }
+    }
+
+    override fun onStop() {
+        super.onStop()
+        fa_coroutine?.cancel(CancellationException("Activity is stopping"))
     }
 
 }