Create a rudimentary DI container for Room

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     package="dev.msfjarvis.todo">
 
     <application
+        android:name=".Application"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

app/src/main/java/dev/msfjarvis/todo/Application.kt

@@ -0,0 +1,11 @@
+package dev.msfjarvis.todo
+
+import android.app.Application
+import dev.msfjarvis.todo.di.Graph
+
+class Application : Application() {
+  override fun onCreate() {
+    super.onCreate()
+    Graph.provide(this)
+  }
+}

app/src/main/java/dev/msfjarvis/todo/di/Graph.kt

@@ -0,0 +1,19 @@
+package dev.msfjarvis.todo.di
+
+import android.content.Context
+import androidx.room.Room
+import dev.msfjarvis.todo.data.source.TodoDatabase
+
+/**
+ * Rudimentary DI container to initialize singletons, will be switched to Hilt when architecture becomes
+ * a focus again.
+ */
+object Graph {
+
+  lateinit var database: TodoDatabase
+
+  fun provide(context: Context) {
+    database = Room.databaseBuilder(context, TodoDatabase::class.java, "data.db")
+      .fallbackToDestructiveMigration().build()
+  }
+}