/// <summary>
/// Deletes the attachment from the API.
/// </summary>
/// <param name="api"></param>
/// <returns></returns>
public async Task DeleteAsync(ITimelineService api)
{
await api.PutJsonAsync("TimelineEventAttachment/Delete", new
{
AttachmentId = Id
});
// Delete attachment from disk if it's there.
var file = Path.Combine(api.CacheFolder, Name);
if (api.FileExists(file))
{
api.FileDelete(file);
}
}
/// <summary>
/// Downloads the attachment file, or gets it from the cache if it's already been downloaded.
/// </summary>
public async Task <string> DownloadOrCacheAsync(ITimelineService api)
{
string url = await GenerateGetPresignedUrlAsync(api);
// Download attachment if it doesn't exist in the cache.
var file = Path.Combine(api.CacheFolder, Name);
if (!api.FileExists(file))
{
await api.DownloadFileAsync(url, file);
}
Debug.WriteLine("URL: " + url);
Debug.WriteLine("Filename: " + file);
return(file);
}
/// <summary>
/// Creates a new attachment and uploads the file in a single action, attaching it to the specified event.
/// </summary>
/// <param name="api">The API to create the attachment on.</param>
/// <param name="eventId">The ID of the event the attachment is being attached to.</param>
/// <param name="filename">The name of the attachment file on the local web server.</param>
/// <param name="fileStream">A stream object containing the file contents.</param>
/// <returns>The new attachment</returns>
public static async Task <Attachment> CreateAndUploadAsync(ITimelineService api, string eventId, string filename, Stream fileStream)
{
var attachment = await CreateAsync(api, eventId, filename);
string temp = Path.GetTempFileName();
try
{
await CopyFileFromStream(api, fileStream, temp);
await attachment.UploadAsync(api, temp);
}
finally
{
if (api.FileExists(temp))
{
api.FileDelete(temp);
}
}
return(attachment);
}