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add direct download support for channels, groups, and topics #1233

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47 changes: 47 additions & 0 deletions app/dl/dl.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,12 +39,21 @@ type Options struct {
Takeout bool
Group bool // auto detect grouped message

// chat-based download
Chat string
Topic int
MsgStart int
MsgEnd int

// resume opts
Continue, Restart bool

// serve
Serve bool
Port int

// html export for text messages
SaveHTML bool
}

type parser struct {
Expand All @@ -62,13 +71,51 @@ func Run(ctx context.Context, c *telegram.Client, kvd storage.Storage, opts Opti
{Data: opts.URLs, Parser: tmessage.FromURL(ctx, pool, kvd, opts.URLs)},
{Data: opts.Files, Parser: tmessage.FromFile(ctx, pool, kvd, opts.Files, true)},
}

// Add chat-based parser if --chat is specified
if opts.Chat != "" {
parsers = append(parsers, parser{
Data: []string{opts.Chat},
Parser: tmessage.FromChat(ctx, pool, kvd, opts.Chat, opts.Topic, opts.MsgStart, opts.MsgEnd),
})
}
dialogs, err := collectDialogs(parsers)
if err != nil {
return err
}
logctx.From(ctx).Debug("Collect dialogs",
zap.Any("dialogs", dialogs))

// Export text messages as HTML if --save-html is enabled and --chat was used
if opts.SaveHTML && opts.Chat != "" {
for _, group := range dialogs {
for _, d := range group {
if len(d.TextMessages) > 0 {
chatName := opts.Chat
chatID := tmessage.GetDialogPeerID(d.Peer)

// Convert tmessage.TextMsg to dl.TextMessage
textMsgs := make([]TextMessage, len(d.TextMessages))
for i, tm := range d.TextMessages {
textMsgs[i] = TextMessage{
ID: tm.ID,
Date: tm.Date,
Text: tm.Text,
Entities: tm.Entities,
ReplyToMsgID: tm.ReplyToMsgID,
FromName: tm.FromName,
}
}

if err := exportTextMessagesHTML(opts.Dir, chatName, chatID, textMsgs); err != nil {
logctx.From(ctx).Warn("Failed to export text messages as HTML",
zap.Error(err))
}
}
}
}
}

if opts.Serve {
return serve(ctx, kvd, pool, dialogs, opts.Port, opts.Takeout)
}
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