Add a download location preference. https://redmine.stoutner.com/issues/32

[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / helpers / DownloadLocationHelper.java

diff --git a/app/src/main/java/com/stoutner/privacybrowser/helpers/DownloadLocationHelper.java b/app/src/main/java/com/stoutner/privacybrowser/helpers/DownloadLocationHelper.java
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index 0000000..f23aaea
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+++ b/app/src/main/java/com/stoutner/privacybrowser/helpers/DownloadLocationHelper.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright © 2020 Soren Stoutner <soren@stoutner.com>.
+ *
+ * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
+ *
+ * Privacy Browser is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Privacy Browser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.stoutner.privacybrowser.helpers;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.os.Environment;
+
+import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
+
+import com.stoutner.privacybrowser.R;
+
+import java.io.File;
+
+public class DownloadLocationHelper {
+    public String getDownloadLocation(Context context) {
+        // Get the download location entry values string array.
+        String[] downloadLocationEntryValuesStringArray = context.getResources().getStringArray(R.array.download_location_entry_values);
+
+        // Get the two standard download directories.
+        File publicDownloadDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
+        File publicAppFilesDirectory = context.getExternalFilesDir(null);
+
+        // Remove the incorrect lint warning below that the public app files directory might be null.
+        assert publicAppFilesDirectory != null;
+
+        // Convert the download directories to strings.
+        String publicDownloadDirectoryString = publicDownloadDirectory.toString();
+        String publicAppFilesDirectoryString = publicAppFilesDirectory.toString();
+
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
+
+        // Get the download location strings from the preferences.
+        String downloadLocationString = sharedPreferences.getString("download_location", context.getString(R.string.download_location_default_value));
+        String downloadCustomLocationString = sharedPreferences.getString("download_custom_location", context.getString(R.string.download_custom_location_default_value));
+
+        // Define a string for the default file path.
+        String defaultFilePath;
+
+        // Set the default file path according to the download location.
+        if (downloadLocationString.equals(downloadLocationEntryValuesStringArray[0])) {  // the download location is set to auto.
+            // Set the download location summary text according to the storage permission status.
+            if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // The storage permission has been granted.
+                // Use the public download directory.
+                defaultFilePath = publicDownloadDirectoryString;
+            } else {  // The storage permission has not been granted.
+                // Use the public app files directory.
+                defaultFilePath = publicAppFilesDirectoryString;
+            }
+        } else if (downloadLocationString.equals(downloadLocationEntryValuesStringArray[1])) {  // The download location is set to the app directory.
+            // Use the public app files directory.
+            defaultFilePath = publicAppFilesDirectoryString;
+        } else if (downloadLocationString.equals(downloadLocationEntryValuesStringArray[2])) {  // The download location is set to the public directory.
+            // Use the public download directory.
+            defaultFilePath = publicDownloadDirectoryString;
+        } else {  // The download location is set to custom.
+            // Use the download custom location.
+            defaultFilePath = downloadCustomLocationString;
+        }
+
+        // Return the default file path.
+        return defaultFilePath;
+    }
+}
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