88346949b5
We do not allow mentioning system user groups for now because this can lead to circumventing the wildcard mention restrictions. It will be enabled once we add a setting to control that. This is implemented by just ignoring it as one of the mentioned user group even if the message content inlcudes the mention syntax for it and the message is sent normally. We still keep the for_mention parameter for accessing user group while sending email and push notifications as mentioning system user groups will be allowed in future. This commit also removes the test for email notifications for system user groups as we are not allowing mentioning them. This commit is only for backend change as we already exclude the system groups from mention typeaheads and other UI.
Zulip overview
Zulip is a powerful, open source group chat application that combines the immediacy of real-time chat with the productivity benefits of threaded conversations. Zulip is used by open source projects, Fortune 500 companies, large standards bodies, and others who need a real-time chat system that allows users to easily process hundreds or thousands of messages a day. With over 700 contributors merging over 500 commits a month, Zulip is also the largest and fastest growing open source group chat project.
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