From 256540f50b9b472b09f68b70d546aa525721873f Mon Sep 17 00:00:00 2001
From: Alexander Danilov <modos189@protonmail.com>
Date: Sun, 2 Dec 2018 22:52:52 +0300
Subject: [PATCH] Storage permission request for mobile application #4

---
 .../iitc_mobile/IITC_FileManager.java         | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/mobile/app/src/main/java/org/exarhteam/iitc_mobile/IITC_FileManager.java b/mobile/app/src/main/java/org/exarhteam/iitc_mobile/IITC_FileManager.java
index bdf0ecd73..3497b554a 100644
--- a/mobile/app/src/main/java/org/exarhteam/iitc_mobile/IITC_FileManager.java
+++ b/mobile/app/src/main/java/org/exarhteam/iitc_mobile/IITC_FileManager.java
@@ -1,5 +1,6 @@
 package org.exarhteam.iitc_mobile;
 
+import android.Manifest;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -7,16 +8,19 @@
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.content.res.AssetManager;
 import android.net.Uri;
 import android.os.Environment;
 import android.os.ParcelFileDescriptor;
 import android.preference.PreferenceManager;
+import android.support.v4.app.ActivityCompat;
 import android.text.Html;
 import android.util.Base64;
 import android.util.Base64OutputStream;
 import android.webkit.WebResourceResponse;
 import android.widget.Toast;
+import android.os.Build;
 
 import org.exarhteam.iitc_mobile.IITC_Mobile.ResponseHandler;
 import org.exarhteam.iitc_mobile.async.UpdateScript;
@@ -331,6 +335,11 @@ public void updatePlugins(final boolean force) {
         final long lastUpdated = mPrefs.getLong("pref_last_plugin_update", 0);
         final long now = System.currentTimeMillis();
 
+        final IITC_Mobile iitc = (IITC_Mobile) mActivity;
+        if (!isWriteStoragePermissionGranted(iitc)) {
+            Toast.makeText(mActivity, "Permissions are required if you want to use user scripts or cache on SDCard", Toast.LENGTH_LONG).show();
+        }
+
         // return if no update wanted
         if ((now - lastUpdated < mUpdateInterval) && !force) return;
         // get the plugin preferences
@@ -355,6 +364,19 @@ public void setUpdateInterval(final int interval) {
         mUpdateInterval = 1000 * 60 * 60 * 24 * interval;
     }
 
+    private boolean isWriteStoragePermissionGranted(IITC_Mobile iitc) {
+        if (Build.VERSION.SDK_INT >= 23) {
+            if (ActivityCompat.checkSelfPermission(iitc, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+                ActivityCompat.requestPermissions(iitc, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 3);
+                return true;
+            } else {
+                return false;
+            }
+        } else { //permission is automatically granted on sdk<23 upon installation
+            return true;
+        }
+    }
+
     private class FileRequest extends WebResourceResponse implements ResponseHandler, Runnable {
         private Intent mData;
         private final String mFunctionName;
@@ -380,6 +402,8 @@ private FileRequest(final Uri uri) {
                     .addCategory(Intent.CATEGORY_OPENABLE);
             final IITC_Mobile iitc = (IITC_Mobile) mActivity;
 
+            Log.d("Request permissions");
+
             try {
                 iitc.startActivityForResult(Intent.createChooser(target, "Choose file"), this);
             } catch (final ActivityNotFoundException e) {