From 8ecbe95e1654ba3e31408c39e57f80dcf6ead3cb Mon Sep 17 00:00:00 2001
From: ByteHamster <info@bytehamster.com>
Date: Mon, 27 Jan 2020 10:28:41 +0100
Subject: Moved database import/export to settings

---
 .../antennapod/core/storage/DatabaseExporter.java  | 95 ++++++++++++++++++++++
 core/src/main/res/values/strings.xml               |  4 +-
 2 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 core/src/main/java/de/danoeh/antennapod/core/storage/DatabaseExporter.java

(limited to 'core/src/main')

diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DatabaseExporter.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DatabaseExporter.java
new file mode 100644
index 000000000..af3d1206c
--- /dev/null
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DatabaseExporter.java
@@ -0,0 +1,95 @@
+package de.danoeh.antennapod.core.storage;
+
+import android.content.Context;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+import de.danoeh.antennapod.core.R;
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOUtils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.channels.FileChannel;
+import java.util.Arrays;
+
+public class DatabaseExporter {
+    private static final String TAG = "DatabaseExporter";
+    private static final byte[] SQLITE3_MAGIC = "SQLite format 3\0".getBytes();
+
+    public static boolean validateDB(Uri inputUri, Context context) throws IOException {
+        try (InputStream inputStream = context.getContentResolver().openInputStream(inputUri)) {
+            byte[] magicBuf = new byte[SQLITE3_MAGIC.length];
+            if (inputStream.read(magicBuf) == magicBuf.length) {
+                return Arrays.equals(SQLITE3_MAGIC, magicBuf);
+            }
+        }
+        return false;
+    }
+
+    public static void exportToDocument(Uri uri, Context context) throws IOException {
+        ParcelFileDescriptor pfd = null;
+        FileOutputStream fileOutputStream = null;
+        try {
+            pfd = context.getContentResolver().openFileDescriptor(uri, "w");
+            fileOutputStream = new FileOutputStream(pfd.getFileDescriptor());
+            exportToStream(fileOutputStream, context);
+        } catch (IOException e) {
+            Log.e(TAG, Log.getStackTraceString(e));
+            throw e;
+        } finally {
+            IOUtils.closeQuietly(fileOutputStream);
+
+            if (pfd != null) {
+                try {
+                    pfd.close();
+                } catch (IOException e) {
+                    Log.d(TAG, "Unable to close ParcelFileDescriptor");
+                }
+            }
+        }
+    }
+
+    public static void exportToStream(FileOutputStream outFileStream, Context context) throws IOException {
+        FileChannel src = null;
+        FileChannel dst = null;
+        try {
+            File currentDB = context.getDatabasePath(PodDBAdapter.DATABASE_NAME);
+
+            if (currentDB.exists()) {
+                src = new FileInputStream(currentDB).getChannel();
+                dst = outFileStream.getChannel();
+                dst.transferFrom(src, 0, src.size());
+            } else {
+                throw new IOException("Can not access current database");
+            }
+        } catch (IOException e) {
+            Log.e(TAG, Log.getStackTraceString(e));
+            throw e;
+        } finally {
+            IOUtils.closeQuietly(src);
+            IOUtils.closeQuietly(dst);
+        }
+    }
+
+    public static void importBackup(Uri inputUri, Context context) throws IOException {
+        InputStream inputStream = null;
+        try {
+            if (!validateDB(inputUri, context)) {
+                throw new IOException(context.getString(R.string.import_bad_file));
+            }
+
+            File currentDB = context.getDatabasePath(PodDBAdapter.DATABASE_NAME);
+            inputStream = context.getContentResolver().openInputStream(inputUri);
+            FileUtils.copyInputStreamToFile(inputStream, currentDB);
+        } catch (IOException e) {
+            Log.e(TAG, Log.getStackTraceString(e));
+            throw e;
+        } finally {
+            IOUtils.closeQuietly(inputStream);
+        }
+    }
+}
diff --git a/core/src/main/res/values/strings.xml b/core/src/main/res/values/strings.xml
index 26ed87537..554e1489f 100644
--- a/core/src/main/res/values/strings.xml
+++ b/core/src/main/res/values/strings.xml
@@ -566,7 +566,9 @@
     <string name="choose_file_from_filesystem">From local filesystem</string>
     <string name="opml_export_label">OPML export</string>
     <string name="html_export_label">HTML export</string>
-    <string name="exporting_label">Exporting&#8230;</string>
+    <string name="database_export_label">Database export</string>
+    <string name="database_import_label">Database import</string>
+    <string name="please_wait">Please wait&#8230;</string>
     <string name="export_error_label">Export error</string>
     <string name="export_success_title">Export successful</string>
     <string name="export_success_sum">The exported file was written to:\n\n%1$s</string>
-- 
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