Start on implementing lesson training

app/src/main/AndroidManifest.xml

@@ -9,7 +9,10 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".LevelSelectActivity" android:parentActivityName=".MainActivity"></activity>
+        <activity android:name=".TrainingActivity" android:parentActivityName=".LevelSelectActivity"></activity>
+        <activity
+            android:name=".LevelSelectActivity"
+            android:parentActivityName=".MainActivity" />
         <activity
             android:name=".SounderActivity"
             android:parentActivityName=".MainActivity"

app/src/main/java/es/eoinrul/ecwt/KochLessonDefinitions.kt

@@ -29,5 +29,9 @@ object KochLessonDefinitions {
         fun indexForHumans() : Int {
             return lessonIndex
         }
+
+        fun getAlphabet() : String {
+            return LessonOrder.substring(0, lessonIndex + 1)
+        }
     }
 }

app/src/main/java/es/eoinrul/ecwt/LevelSelectActivity.kt

@@ -1,11 +1,14 @@
 package es.eoinrul.ecwt
 
+import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import es.eoinrul.ecwt.R
 
+const val TRAINING_ALPHABET = "es.eoinrul.ecwt.TRAINING_ALPHABET"
+
 class LevelSelectActivity : AppCompatActivity(),
     TrainingLevelFragment.OnListFragmentInteractionListener {
 
@@ -23,7 +26,10 @@ class LevelSelectActivity : AppCompatActivity(),
     }
 
     override fun onListFragmentInteraction(lesson: KochLessonDefinitions.KochLesson?) {
-        TODO("Not yet implemented")
+        val intent = Intent(this, TrainingActivity::class.java).apply {
+            putExtra(TRAINING_ALPHABET, lesson?.getAlphabet())
+        }
+        startActivity(intent);
     }
 
 

app/src/main/java/es/eoinrul/ecwt/TrainingActivity.kt

@@ -0,0 +1,51 @@
+package es.eoinrul.ecwt
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import androidx.preference.PreferenceManager
+import kotlin.random.Random
+
+class TrainingActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_traning)
+
+        initSoundPlayer()
+
+        val alphabet = intent.getStringExtra(TRAINING_ALPHABET);
+        startLesson(alphabet!!) //TODO Only after user input is ready
+    }
+
+    private fun initSoundPlayer() {
+        val generatorSettings = DitDahGeneratorSettings()
+
+        val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
+        generatorSettings.toneFrequency = sharedPreferences.getInt("sender_tone", generatorSettings.toneFrequency)
+
+        mSoundPlayer = DitDahSoundStream(generatorSettings)
+    }
+
+    private fun startLesson(alphabet : String) {
+        val generatorSettings = DitDahGeneratorSettings()
+        val lessonLengthInMinutes = 1 // TODO These should be configurable from the settings window
+        val wordSize = 5
+        val numberOfWords = generatorSettings.farnsworthWordsPerMinute * lessonLengthInMinutes
+
+        var lessonText = String()
+        var rng = Random.Default
+        for(i in 0 until numberOfWords) {
+            for(c in 0 until wordSize) {
+                val randomLetterIndex = rng.nextInt(0, alphabet.length)
+                lessonText += alphabet.substring(randomLetterIndex, randomLetterIndex + 1)
+            }
+            lessonText += " "
+        }
+
+        mSoundPlayer.enqueue(StringToSoundSequence(lessonText))
+
+    }
+
+    private lateinit var mSoundPlayer : DitDahSoundStream
+
+}

app/src/main/res/layout/activity_traning.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="es.eoinrul.ecwt.TrainingActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>