We attempted a number of different approaches to solving this problem:
First, we tried using HTML5 local storage to keep track of which
browser should have created the desktop notification. This failed
because one needs locking, and it doesn't appear there is an working
locking implementation for HTML5 local storage that could allow us to
do this across tabs. See #2936 for details.
Ultimately we went with setting the message ID as a tag. Tags are
intended to be used for updating existing desktop notifications, which
means this implementation causes new notifications to flicker in and
out sometimes when multiple tabs are open, but that certainly beats
having duplicates.
Fixes#99.
Previously, the emoji reactions popovers were keyed off the
edit_content area, which is problematic because that area was
created/deleted on hover, resulting in orphaned popovers (which
wouldn't close properly normally). That had been hackishly addressed
in the original PR with the overbroad `$('.popover').remove();`. To
remove that, we fix the actions popover to always be based on an
element that exists in the page.
There probably more to do here, but this is good enough to merge emoji
reactions and iterate from here.
This commit replaces the placeholder "clipboard" button with a reaction button.
This is done on any message that can't be edited. Also, on messages sent by
the user the actions popover (toggled by the down chevron icon) contains
an option to add a reaction.
When clicked, a popover with a search bar and a list of emojis is displayed.
If the right sidebar is collapsed (the viewport is small), the popover is placed
to the left of the button.
Focus is set to the search bar. Typing in the search bar filters emojis.
Emojis with which the user has reacted to this message are highlighted.
Clicking them sends an API request to remove that reaction.
Clicking on non-highlighted emojis sends an API request to add a reaction.
When the popover loses focus it is closed.
The frontend listens for reaction events. When an add-reaction event is
received, the emoji is displayed at the bottom of the message with a
count initialized to 1. If there was an existing reaction to the message with
the same emoji, the count is incremented.
Old messages fetched from the server contain reactions.
They are displayed (along with title and count) at the bottom
of each message.
When clicking the emoji reaction at the bottom of the message, if the
user has already reacted with that emoji to this message, the reaction
is removed and the count is decremented. Otherwise, a reaction is added
and the count is incremented.
Hovering over the emoji reaction at the bottom of the message displays
a list of users who have reacted with this emoji along with the
emoji name.
Hovering over the emoji reactions at the bottom of the message displays
a button to add a reaction.
Fixes#541.
The new GitHub dispatcher integration was apparently totally broken,
because we hadn't tagged the new dispatcher endpoint as exempt from
CSRF checking. I'm not sure why the test suite didn't catch this.
