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fix: Correctly delete unneeded messages on the server; Remove "Delete Messages from Server" (delete_server_after) config option (#8240)

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Fix https://github.com/chatmail/core/issues/8195
Supersedes https://github.com/chatmail/core/pull/8217

The most interesting change is in `delete_expired_imap_messages()`
because there, messages are marked for deletion on single-device
chatmail profiles.

The logic in `delete_expired_imap_messages()` was wrong before, and
pre-messages were not deleted at all. This is fixed by also querying
`pre_rfc724_mid` in addition to `rfc724_mid` from the `msgs` table.
In order not to make the SQL statement too complex, I split it into two.

WRT tests:
- `test_immediate_autodelete()` tests the auto-deletion;
`test_imap_autodelete_fully_downloaded_msg()` tests that even for a
message that is split into pre- and post-message, both messages are
deleted.
- A lot of tests test that if bcc_self is on, messages are not
auto-deleted. E.g. `test_one_account_send_bcc_setting()` and
`test_markseen_message_and_mdn()` relies on the fact that messages stay
on the server when bcc_self is on.
- Unfortunately, it is not possible to test that messages are only
deleted for chatmail servers, because we don't have any tests that use a
non-chatmail server.
This commit is contained in:
Hocuri
2026-05-22 18:45:50 +02:00
committed by GitHub
parent 602922c1d5
commit 961cacd795
24 changed files with 354 additions and 418 deletions
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11
deltachat-ffi/deltachat.h
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@@ -413,11 +413,6 @@ char* dc_get_blobdir (const dc_context_t* context);
* Messages in the "saved messages" chat (see dc_chat_is_self_talk()) are skipped.
* Messages are deleted whether they were seen or not, the UI should clearly point that out.
* See also dc_estimate_deletion_cnt().
* - `delete_server_after` = 0=do not delete messages from server automatically (default),
* 1=delete messages directly after receiving from server, mvbox is skipped.
* >1=seconds, after which messages are deleted automatically from the server, mvbox is used as defined.
* "Saved messages" are deleted from the server as well as emails, the UI should clearly point that out.
* See also dc_estimate_deletion_cnt().
* - `media_quality` = DC_MEDIA_QUALITY_BALANCED (0) =
* good outgoing images/videos/voice quality at reasonable sizes (default)
* DC_MEDIA_QUALITY_WORSE (1)
@@ -1462,16 +1457,16 @@ dc_chatlist_t* dc_get_similar_chatlist (dc_context_t* context, uint32_t ch
/**
* Estimate the number of messages that will be deleted
* by the dc_set_config()-options `delete_device_after` or `delete_server_after`.
* by the dc_set_config()-option `delete_device_after`.
* This is typically used to show the estimated impact to the user
* before actually enabling deletion of old messages.
*
* @memberof dc_context_t
* @param context The context object as returned from dc_context_new().
* @param from_server 1=Estimate deletion count for server, 0=Estimate deletion count for device
* @param from_server Deprecated, pass 0 here
* @param seconds Count messages older than the given number of seconds.
* @return Number of messages that are older than the given number of seconds.
* Messages in the "saved messages" folder are not counted as they will not be deleted automatically.
* Messages in the "Saved Messages" chat are not counted as they will not be deleted automatically.
*/
int dc_estimate_deletion_cnt (dc_context_t* context, int from_server, int64_t seconds);