//поиск папки для backup
private async Task <DriveId> FindItems(string folderName)
{
DriveId folderId = null;
try
{
//установим запрос поиска
IDriveFolder appFolder = DriveClass.DriveApi.GetRootFolder(_googleApiClient);
var query = new QueryClass
.Builder().AddFilter(Filters.And(
Filters.Eq(SearchableField.Title, folderName),
Filters.Eq(SearchableField.Trashed, false))).Build();
var queryResult = await appFolder.QueryChildrenAsync(_googleApiClient, query);
foreach (var driveItem in queryResult.MetadataBuffer)
{
if (driveItem.IsFolder && driveItem.Title == folderName)
{
folderId = driveItem.DriveId;
}
}
return(folderId);
}
catch (Exception er)
{
Log.Logger.Error(er.Message, er.StackTrace);
return(folderId);
}
}
private void ReadFileFromDrive()
{
var query = new QueryClass.Builder()
.AddFilter(Filters.Contains(SearchableField.Title, Constants.BackupFileName)).Build();
DriveClass.DriveApi.Query(_googleApiClient, query)
.SetResultCallback(this);
}
private void CheckFolderExists()
{
var query =
new QueryClass.Builder().AddFilter(Filters.And(Filters.Eq(SearchableField.Title, FolderName), Filters.Eq(SearchableField.Trashed, false)))
.Build();
DriveClass.DriveApi.Query(_googleApiClient, query).SetResultCallback(this);
}
// https://stackoverflow.com/questions/45725225/how-to-query-an-idriveresource-in-google-drive-for-xamarin-android-using-the-dri
private async Task <BackupMetadata> GetMetadataFromDrive(int retry = 6)
{
try
{
var fileName = GetFileName();
var folder = GetFolder();
var query = new QueryClass.Builder()
.AddFilter(Filters.Contains(SearchableField.Title, fileName))
.Build();
using (var queryResult = await folder.QueryChildrenAsync(_googleApiClient, query))
{
if (queryResult?.MetadataBuffer == null)
{
Thread.Sleep(150);
return(retry > 0 ? await GetMetadataFromDrive(--retry) : new BackupMetadata());
}
if (queryResult.MetadataBuffer.Count > 1)
{
//LogEvent(nameof(GetMetadataFromDrive), new System.Exception($"Warning: {queryResult.MetadataBuffer.Count} backup files found."));
}
var result = queryResult
.MetadataBuffer
.Select(x => x as Metadata)
.Where(x => x != null)
.Select(x => new BackupMetadata(x))
.Where(x => x != null)
.Where(x => x.HasValue)
.OrderByDescending(x => x.LastBackup)
.FirstOrDefault();
if (result == null)
{
Thread.Sleep(150);
return(retry > 0 ? await GetMetadataFromDrive(--retry) : new BackupMetadata());
}
return(result);
}
}
catch (System.Exception ex)
{
//LogEvent(nameof(GetMetadataFromDrive), ex);
}
return(null);
}
private async Task <IDriveFile> GetFileAsync()
{
var rootFolder = DriveClass
.DriveApi
.GetRootFolder(this.client);
var query = new QueryClass.Builder()
.AddFilter(Filters.Eq(SearchableField.Title, documentFilename))
.Build();
var result = await rootFolder.QueryChildrenAsync(this.client, query);
if (!result.Status.IsSuccess || result.MetadataBuffer.Count == 0)
{
this.logger.Warn("Failed to find existing exercise document.");
return(null);
}
var fileMetadata = result.MetadataBuffer.First();
var file = DriveClass
.DriveApi
.GetFile(this.client, fileMetadata.DriveId);
return(file);
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
buttonCreate = FindViewById <Button> (Resource.Id.buttonCreate);
buttonSearch = FindViewById <Button> (Resource.Id.buttonSearch);
editTextFilename = FindViewById <EditText> (Resource.Id.editTextFilename);
listViewResults = FindViewById <ListView> (Resource.Id.listViewResults);
buttonCreate.Click += async delegate {
// Create the new file info
var metadataChangeSet = new MetadataChangeSet.Builder()
.SetMimeType("text/plain")
.SetTitle(editTextFilename.Text)
.Build();
// Get our root folder
var rootFolder = DriveClass.DriveApi.GetRootFolder(googleApiClient);
// Create a blank file
await rootFolder.CreateFile(googleApiClient, metadataChangeSet, null).AsAsync <IDriveFolderDriveFileResult> ();
};
buttonSearch.Click += async delegate {
buttonSearch.Enabled = false;
// Build a query to search for files of
// This will only return files that you created/opened through this app
var query = new QueryClass.Builder()
.AddFilter(Filters.Contains(SearchableField.Title, editTextFilename.Text))
.Build();
// Execute search asynchronously
var results = await DriveClass.DriveApi.Query(googleApiClient, query).AsAsync <IDriveApiMetadataBufferResult> ();
// Check for a successful result
if (results.Status.IsSuccess)
{
var files = new List <Metadata> ();
// Loop through the results
for (var i = 0; i < results.MetadataBuffer.Count; i++)
{
files.Add(results.MetadataBuffer.Get(i).JavaCast <Metadata> ());
}
listViewResults.Adapter = new ArrayAdapter <string> (
this,
Android.Resource.Layout.SimpleListItem1,
Android.Resource.Id.Text1,
(from f in files select f.Title).ToArray());
if (files.Count <= 0)
{
Toast.MakeText(this, "No results found!", ToastLength.Short).Show();
}
}
buttonSearch.Enabled = true;
};
buttonCreate.Enabled = false;
buttonSearch.Enabled = false;
googleApiClient = new GoogleApiClient.Builder(this)
.AddApi(DriveClass.API)
.AddScope(DriveClass.ScopeFile)
.AddScope(DriveClass.ScopeAppfolder)
.UseDefaultAccount()
.AddConnectionCallbacks(this)
.AddOnConnectionFailedListener(this)
.Build();
}
private async Task<IDriveFile> GetFileAsync()
{
var rootFolder = DriveClass
.DriveApi
.GetRootFolder(this.client);
var query = new QueryClass.Builder()
.AddFilter(Filters.Eq(SearchableField.Title, documentFilename))
.Build();
var result = await rootFolder.QueryChildrenAsync(this.client, query);
if (!result.Status.IsSuccess || result.MetadataBuffer.Count == 0)
{
this.logger.Warn("Failed to find existing exercise document.");
return null;
}
var fileMetadata = result.MetadataBuffer.First();
var file = DriveClass
.DriveApi
.GetFile(this.client, fileMetadata.DriveId);
return file;
}
// https://www.youtube.com/watch?v=UiTHG_yl-jA
// https://github.com/athingunique/Drive-Database-Sync
// https://developers.google.com/drive/android/appfolder
// https://developers.google.com/drive/android/queries
private async Task<Metadata> QueryFileInDriveAppFolderAsync(string title)
{
QueryClass query = new QueryClass.Builder()
.AddFilter(Filters.Eq(SearchableField.Title, title))
.Build();
IDriveApiMetadataBufferResult metadataBufferResult = await DriveClass.DriveApi
.GetAppFolder(_googleClientApi)
.QueryChildrenAsync(_googleClientApi, query).ConfigureAwait(false);
if(!metadataBufferResult.Status.IsSuccess) {
Logger.Error($"{_activity.GetType()} Failed to query drive file: {metadataBufferResult.Status.StatusMessage}");
return null;
}
return metadataBufferResult.MetadataBuffer.Count < 1 ? null : metadataBufferResult.MetadataBuffer.ElementAt(0);
}
