App is now fully converted to Kotlin

app/src/main/java/com/denizd/substitutionplan/SubstRepository.kt

@@ -0,0 +1,66 @@
+package com.denizd.substitutionplan
+
+import android.app.Application
+import android.os.AsyncTask
+
+import androidx.lifecycle.LiveData
+
+public class SubstRepository(application: Application) {
+
+    private val substDao: SubstDao?
+    val allSubst: LiveData<List<Subst>>?
+
+    init {
+        val database = SubstDatabase.getInstance(application)
+        substDao = database?.substDao()
+        allSubst = substDao?.allSubst
+    }
+
+    fun insert(subst: Subst) {
+        InsertSubstAsync(substDao).execute(subst)
+    }
+
+    fun update(subst: Subst) {
+        UpdateSubstAsync(substDao).execute(subst)
+    }
+
+    fun delete(subst: Subst) {
+        DeleteSubstAsync(substDao).execute(subst)
+    }
+
+    fun deleteAllSubst() {
+        DeleteAllSubstAsync(substDao).execute()
+    }
+
+    class InsertSubstAsync(substDao: SubstDao?) : AsyncTask<Subst, Void, Void>() {
+        val mSubstDao = substDao
+        override fun doInBackground(vararg substs: Subst): Void? {
+            mSubstDao?.insert(substs[0])
+            return null
+        }
+    }
+
+    class UpdateSubstAsync(substDao: SubstDao?) : AsyncTask<Subst, Void, Void>() {
+        private val mSubstDao = substDao
+        override fun doInBackground(vararg substs: Subst): Void? {
+            mSubstDao?.update(substs[0])
+            return null
+        }
+    }
+
+    class DeleteSubstAsync(substDao: SubstDao?) : AsyncTask<Subst, Void, Void>() {
+        private val mSubstDao = substDao
+        override fun doInBackground(vararg substs: Subst): Void? {
+            mSubstDao?.delete(substs[0])
+            return null
+        }
+    }
+
+    class DeleteAllSubstAsync(substDao: SubstDao?) : AsyncTask<Void, Void, Void>() {
+        private val mSubstDao = substDao
+        override fun doInBackground(vararg voids: Void): Void? {
+            mSubstDao?.deleteAllSubst()
+            return null
+        }
+    }
+}