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Push notification extension

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This change adds XDELTAPUSH capability.

Delta Chat clients detecting this capability
can set /private/devicetoken IMAP metadata
on the inbox to subscribe for Apple (APNS)
notifications.

Notifications are implemented in a new
`chatmail-metadata` service
which handles requests to set /private/devicetoken
IMAP metadata from Delta Chat clients
and /private/messagenew requests from
push_notification_lua script.

To avoid sending notifications for
MDNs, webxdc updates and Delta Chat sync messages,
messages with Auto-Submitted header are ignored
by setting $Auto keyword (flag) on them in Sieve script
and skipping such messages in push_notification_lua script.
Outgoing messages are also ignored.
This commit is contained in:
link2xt
2024-01-24 23:14:05 +00:00
parent e6a3fab6aa
commit 42e50b089f
9 changed files with 213 additions and 9 deletions
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29
cmdeploy/src/cmdeploy/dovecot/dovecot.conf.j2
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@@ -21,7 +21,7 @@ mail_plugins = quota
# these are the capabilities Delta Chat cares about actually
# so let's keep the network overhead per login small
# https://github.com/deltachat/deltachat-core-rust/blob/master/src/imap/capabilities.rs
imap_capability = IMAP4rev1 IDLE MOVE QUOTA CONDSTORE NOTIFY METADATA
imap_capability = IMAP4rev1 IDLE MOVE QUOTA CONDSTORE NOTIFY METADATA XDELTAPUSH
# Authentication for system users.
@@ -71,6 +71,9 @@ mail_privileged_group = vmail
## Mail processes
##
# Pass all IMAP METADATA requests to the server implementing Dovecot's dict protocol.
mail_attribute_dict = proxy:/run/dovecot/metadata.socket:metadata
# Enable IMAP COMPRESS (RFC 4978).
# <https://datatracker.ietf.org/doc/html/rfc4978.html>
protocol imap {
@@ -79,7 +82,21 @@ protocol imap {
}
protocol lmtp {
mail_plugins = $mail_plugins quota
# quota plugin documentation:
# <https://doc.dovecot.org/configuration_manual/quota_plugin/>
#
# notify plugin is a dependency of push_notification plugin:
# <https://doc.dovecot.org/settings/plugin/notify-plugin/>
#
# push_notification plugin documentation:
# <https://doc.dovecot.org/configuration_manual/push_notification/>
#
# mail_lua and push_notification_lua are needed for Lua push notification handler.
# <https://doc.dovecot.org/configuration_manual/push_notification/#configuration>
#
# Sieve to mark messages that should not be notified as \Seen
# <https://doc.dovecot.org/configuration_manual/sieve/configuration/>
mail_plugins = $mail_plugins quota mail_lua notify push_notification push_notification_lua sieve
}
plugin {
@@ -95,7 +112,15 @@ plugin {
# quota_over_flag_value = TRUE
}
# push_notification configuration
plugin {
# <https://doc.dovecot.org/configuration_manual/push_notification/#lua-lua>
push_notification_driver = lua:file=/etc/dovecot/push_notification.lua
}
plugin {
sieve_default = file:/etc/dovecot/default.sieve
}
service lmtp {
user=vmail