refactor load/save meta to shared prefs

app/src/main/java/org/wntr/mdeditor/MainActivity.kt

@@ -324,7 +324,19 @@ class MainActivity : AppCompatActivity() {
             Log.d(javaClass.simpleName, "AutosaveTimer started.")
             return
         }
-        loadMetaFromSharedPrefs()
+
+        if (!loadMetaFromSharedPrefs(applicationContext)) {
+            with(AlertDialog.Builder(this)){
+                setPositiveButton("Open", { dialog, id ->
+                    openFile()
+                })
+                setNeutralButton("New", { dialog, id ->
+                    selectFileForSaveAs()
+                })
+                show()
+            }
+        }
+
         if (intent.data !== null) {
             readFile(intent.data!!)
             Log.d(javaClass.simpleName,"Loading on resume from intent: ${thisFileUri}")
@@ -386,7 +398,7 @@ class MainActivity : AppCompatActivity() {
                 intent.putExtra(Intent.EXTRA_STREAM, null as Uri?)
             } else if (mimeType == "text" && intent.data != null ) {
                 thisFileUri = uri
-                saveMetaToSharedPrefs()
+                saveMetaToSharedPrefs(applicationContext)
                 Log.d(javaClass.simpleName,"wanna start app with new txt")
             }
         }
@@ -728,8 +740,6 @@ class MainActivity : AppCompatActivity() {
         startActivityForResult(intent, OPEN_FILE)
     }
 
-
-
     fun selectFileForSaveAs() {
         val intent = Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
             addCategory(Intent.CATEGORY_OPENABLE)
@@ -791,7 +801,7 @@ class MainActivity : AppCompatActivity() {
                     Intent.FLAG_GRANT_READ_URI_PERMISSION and Intent.FLAG_GRANT_WRITE_URI_PERMISSION
                 )
                 thisFileUri = uri
-                saveMetaToSharedPrefs()
+                saveMetaToSharedPrefs(applicationContext)
                 if (metaData.metaData.get("url") == null) {
                     deleteVisible = false
                     invalidateOptionsMenu()
@@ -929,7 +939,7 @@ class MainActivity : AppCompatActivity() {
                 Toast.LENGTH_LONG
             ).show()
             textFile.close()
-            saveMetaToSharedPrefs()
+            saveMetaToSharedPrefs(applicationContext)
             Log.i(javaClass.simpleName, "file newly written")
         } catch (e: Exception) {
             Toast.makeText(
@@ -1090,38 +1100,6 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
-    private fun saveMetaToSharedPrefs() {
-        if (thisFileUri == null) return
-        Log.d(javaClass.simpleName, "saving to shared prefs cursor: ${metaData.cursor} in file: ${thisFileUri}")
-        getSharedPreferences("prefs", Context.MODE_PRIVATE)
-            .edit().apply {
-                putString("lastFile", thisFileUri.toString())
-                putString("cursor", metaData.cursor)
-                apply()
-            }
-    }
-
-    private fun loadMetaFromSharedPrefs(){
-        val prefs = getSharedPreferences("prefs", Context.MODE_PRIVATE)
-        val uriString = prefs.getString("lastFile", "noLastFile")
-
-        if (uriString == "noLastFile") {
-            with(AlertDialog.Builder(this)){
-                setPositiveButton("Open", { dialog, id ->
-                    openFile()
-                })
-                setNeutralButton("New", { dialog, id ->
-                    selectFileForSaveAs()
-                })
-                show()
-            }
-        } else {
-            thisFileUri = parse(uriString)
-            metaData.cursor = prefs.getString("cursor", "nocursor") ?: "{ line: 0, ch: 0, sticky: null }"
-            Log.i(javaClass.simpleName,"Loaded cursor: ${metaData.cursor}")
-        }
-    }
-
     override fun onPause() {
         super.onPause()
         try{
@@ -1133,7 +1111,7 @@ class MainActivity : AppCompatActivity() {
         webView.evaluateJavascript("easyMDE.codemirror.doc.getCursor();") {
             metaData.cursor=it
             Log.i(javaClass.simpleName,"Cursor: $it")
-            saveMetaToSharedPrefs()
+            saveMetaToSharedPrefs(applicationContext)
         }
         Log.i(javaClass.simpleName, "\"onPause\" durchlaufen")
     }
@@ -1143,5 +1121,3 @@ class MainActivity : AppCompatActivity() {
         Log.i(javaClass.simpleName, "\"onRestoreInstanceState\" durchlaufen")
     }
 }
-
-

app/src/main/java/org/wntr/mdeditor/helpers.kt

@@ -2,13 +2,10 @@ package org.wntr.mdeditor
 
 import android.annotation.SuppressLint
 import android.content.Context
-import android.content.Intent
 import android.net.Uri
 import android.provider.OpenableColumns
 import android.util.Log
 import android.widget.Toast
-import androidx.core.content.ContextCompat.startActivity
-import androidx.core.content.FileProvider
 import java.io.File
 import java.io.FileOutputStream
 import java.io.IOException
@@ -161,3 +158,28 @@ fun queryName(context: Context, uri: Uri): String? {
     return name
 }
 
+fun saveMetaToSharedPrefs(context: Context) {
+    if (MainActivity.thisFileUri == null) return
+    Log.d("saveMetaToSharedPrefs", "saving to shared prefs cursor: ${MainActivity.metaData.cursor} in file: ${MainActivity.thisFileUri}")
+    context.getSharedPreferences("prefs", Context.MODE_PRIVATE)
+        .edit().apply {
+            putString("lastFile", MainActivity.thisFileUri.toString())
+            putString("cursor", MainActivity.metaData.cursor)
+            apply()
+        }
+}
+
+fun loadMetaFromSharedPrefs(context: Context): Boolean{
+    val prefs = context.getSharedPreferences("prefs", Context.MODE_PRIVATE)
+    val uriString = prefs.getString("lastFile", "noLastFile")
+
+    if (uriString == "noLastFile") {
+        Log.i("loadMetaFromSharedPrefs","No lastfile saved")
+        return false
+    } else {
+        MainActivity.thisFileUri = Uri.parse(uriString)
+        MainActivity.metaData.cursor = prefs.getString("cursor", "nocursor") ?: "{ line: 0, ch: 0, sticky: null }"
+        Log.i("loadMetaFromSharedPrefs","Loaded cursor: ${MainActivity.metaData.cursor}")
+        return true
+    }
+}