Implements extremely basic file reading

app/src/main/java/com/dnsc/plaindo/MainActivity.kt

@@ -1,19 +1,50 @@
 package com.dnsc.plaindo
 
 import android.os.Bundle
+import android.util.Log
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
+import com.dnsc.plaindo.data.TodoFileRepository
 import com.dnsc.plaindo.ui.theme.PlaindoTheme
 
 class MainActivity : ComponentActivity() {
+    private lateinit var todoFileRepository: TodoFileRepository
+    private lateinit var openDocumentLauncher: ActivityResultLauncher<Array<String>>
+    private val TAG = "MainActivity"
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+
+        // Set up dependencies
+        todoFileRepository = TodoFileRepository(this)
+
+        // Draw content
         enableEdgeToEdge()
         setContent {
             PlaindoTheme {
                 PlaindoApp()
             }
         }
+
+        // Handle init tasks
+        openDocumentLauncher = registerForActivityResult(
+            ActivityResultContracts.OpenDocument()
+        ) { uri ->
+            if (uri != null) {
+                // TODO: Store uri in shared preferences
+                // TODO: Persist access to URI
+                todoFileRepository.load(uri)
+            } else {
+                // TODO: Handle user cancelled selection
+                Log.d(TAG, "No document selected")
+            }
+        }
+
+        // TODO: Move to / listen to button click for this function
+        openDocumentLauncher.launch(arrayOf("text/plain"))
     }
-}
+}
+

app/src/main/java/com/dnsc/plaindo/data/TodoFileRepository.kt

@@ -0,0 +1,24 @@
+package com.dnsc.plaindo.data
+
+import android.content.Context
+import android.net.Uri
+import android.util.Log
+import java.io.BufferedReader
+import java.io.InputStreamReader
+
+class TodoFileRepository(val context: Context) {
+    fun load(uri: Uri) {
+        context.contentResolver.openInputStream(uri)?.use { inputStream ->
+            BufferedReader(InputStreamReader(inputStream)).use { reader ->
+                var line: String? = reader.readLine()
+                while (line != null) {
+                    Log.d("Plaindo", line)
+
+                    // TODO: Add task to data structure
+
+                    line = reader.readLine()
+                }
+            }
+        }
+    }
+}