public async Task PullFilesAsync(string tableName, string itemId)
{
IEnumerable <MobileServiceFile> files = await this.mobileServiceFilesClient.GetFilesAsync(tableName, itemId);
foreach (var file in files)
{
FileSynchronizationAction syncAction = FileSynchronizationAction.Update;
MobileServiceFileMetadata metadata = await this.metadataStore.GetFileMetadataAsync(file.Id);
if (metadata == null)
{
syncAction = FileSynchronizationAction.Create;
metadata = MobileServiceFileMetadata.FromFile(file);
metadata.ContentMD5 = null;
metadata.LastModified = null;
}
if (string.Compare(metadata.ContentMD5, file.ContentMD5, StringComparison.Ordinal) != 0 ||
(metadata.LastModified == null || metadata.LastModified.Value.ToUniversalTime() != file.LastModified.Value.ToUniversalTime()))
{
metadata.LastModified = file.LastModified;
metadata.ContentMD5 = file.ContentMD5;
await this.metadataStore.CreateOrUpdateAsync(metadata);
await this.syncHandler.ProcessFileSynchronizationAction(file, syncAction);
NotifyFileOperationCompletion(file, syncAction.ToFileOperationKind(), FileOperationSource.ServerPull);
}
}
var fileMetadata = await this.metadataStore.GetMetadataAsync(tableName, itemId);
var deletedItemsMetadata = fileMetadata.Where(m => !files.Any(f => string.Compare(f.Id, m.FileId) == 0));
foreach (var metadata in deletedItemsMetadata)
{
IMobileServiceFileOperation pendingOperation = await this.operationsQueue.GetOperationByFileIdAsync(metadata.FileId);
// TODO: Need to call into the sync handler for conflict resolution here...
if (pendingOperation == null || pendingOperation is DeleteMobileServiceFileOperation)
{
await metadataStore.DeleteAsync(metadata);
await this.syncHandler.ProcessFileSynchronizationAction(MobileServiceFile.FromMetadata(metadata), FileSynchronizationAction.Delete);
NotifyFileOperationCompletion(MobileServiceFile.FromMetadata(metadata), FileOperationKind.Delete, FileOperationSource.ServerPull);
}
}
}
