60 lines
2.9 KiB
C#
60 lines
2.9 KiB
C#
// Copyright (c) 2026 Duplicati Inc. All rights reserved.
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using Duplicati.Library.Common.IO;
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using Google.Apis.Gmail.v1.Data;
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using Google.Apis.Gmail.v1;
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namespace Duplicati.Proprietary.GoogleWorkspace.SourceItems;
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internal class GmailMessageSourceEntry(string userId, string parentPath, Message message, GmailService service, string? groupEmail = null)
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: StreamResourceEntryBase(SystemIO.IO_OS.PathCombine(parentPath, message.Id + ".eml"),
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message.InternalDate.HasValue ? DateTimeOffset.FromUnixTimeMilliseconds(message.InternalDate.Value).UtcDateTime : DateTime.UnixEpoch,
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message.InternalDate.HasValue ? DateTimeOffset.FromUnixTimeMilliseconds(message.InternalDate.Value).UtcDateTime : DateTime.UnixEpoch)
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{
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public override long Size => message.SizeEstimate ?? 0;
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public override async Task<Stream> OpenRead(CancellationToken cancellationToken)
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{
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var request = service.Users.Messages.Get(userId, message.Id);
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request.Format = UsersResource.MessagesResource.GetRequest.FormatEnum.Raw;
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var msg = await request.ExecuteAsync(cancellationToken);
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// Raw is base64url encoded string
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var bytes = FromBase64Url(msg.Raw);
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return new MemoryStream(bytes);
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}
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private static byte[] FromBase64Url(string base64Url)
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{
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string padded = base64Url.Length % 4 == 0
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? base64Url
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: base64Url + new string('=', 4 - base64Url.Length % 4);
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string base64 = padded.Replace('-', '+').Replace('_', '/');
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return Convert.FromBase64String(base64);
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}
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public override Task<Dictionary<string, string?>> GetMinorMetadata(CancellationToken cancellationToken)
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{
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var subject = message.Payload?.Headers?.FirstOrDefault(h => h.Name?.Equals("Subject", StringComparison.OrdinalIgnoreCase) == true)?.Value;
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var messageId = message.Payload?.Headers?.FirstOrDefault(h => h.Name?.Equals("Message-Id", StringComparison.OrdinalIgnoreCase) == true)?.Value;
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var from = message.Payload?.Headers?.FirstOrDefault(h => h.Name?.Equals("From", StringComparison.OrdinalIgnoreCase) == true)?.Value;
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var date = message.Payload?.Headers?.FirstOrDefault(h => h.Name?.Equals("Date", StringComparison.OrdinalIgnoreCase) == true)?.Value;
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return Task.FromResult(new Dictionary<string, string?>
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{
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{ "gsuite:v", "1" },
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{ "gsuite:Type", SourceItemType.GmailMessage.ToString() },
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{ "gsuite:Name", string.IsNullOrWhiteSpace(subject) ? message.Id : subject },
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{ "gsuite:Id", message.Id },
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{ "gsuite:ThreadId", message.ThreadId },
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{ "gsuite:Snippet", message.Snippet },
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{ "gsuite:From", from },
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{ "gsuite:Date", date },
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{ "gsuite:Message-Id", messageId },
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{ "gsuite:GroupEmail", groupEmail }
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}
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.Where(kv => !string.IsNullOrEmpty(kv.Value))
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.ToDictionary(kv => kv.Key, kv => kv.Value));
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}
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}
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