Commit Graph

795 Commits

Author SHA1 Message Date
Ted Johansson
d2e9ea6193
FEATURE: Allow group owners promote more owners (#19768)
This change allows group owners (in addition to admins) to promote other members to owners.
2023-01-11 16:43:18 +08:00
David Taylor
7c77cc6a58
DEV: Apply syntax_tree formatting to config/* 2023-01-09 11:13:29 +00:00
Alan Guo Xiang Tan
cf862e7365
SECURITY: Convert send_digest to a post request (#19746)
Co-authored-by: Isaac Janzen <isaac.janzen@discourse.org>
2023-01-05 06:57:12 +08:00
Jarek Radosz
f9bdda84ca
DEV: Admin webhooks interface issues (#19360)
1. The events table had broken styling, making each row overflow
2. It had confusing routes: `/:id` for "edit" and `/:id/events` for "show" (now it's `/:id/edit` and `/:id` respectively)
3. There previously was an unused backend action (`#edit`) - now it is used (and `web_hooks/:id/events` route has been removed)
4. There was outdated/misplaced/duplicated CSS
5. And more
2022-12-13 01:53:08 +01:00
David Taylor
1db3a578e4
PERF: Improve Accept header handling for stylesheets and theme-js (#19357)
The default behavior for Rails is to vary the response of an endpoint based on the `Accept:` header, and therefore it returns a `Vary:` header on responses. This instructs browsers and intermediate proxies to key their caches based on the value of the request's `Accept` header. In some cases (e.g. Akamai), the presence of a `Vary` header is enough to prevent caching entirely.

This commit restructures the Rails route definitions so that:
1. The "format" segment of the route is 'required'
2. The "format" segment of the route is constrained to a single value (e.g. `js` or `css`)

Now that the routes are guaranteed to have a `:format` segment, Rails will always prioritize that over the `Accept` header, and will therefore omit the `Vary` header.

Request specs are also added to test this behaviour for both stylesheets and theme-javascripts.
2022-12-07 15:46:35 +00:00
Bianca Nenciu
93859037ef
FEATURE: Improve composer warnings for mentions (#18796)
* FEATURE: Show warning if group cannot be mentioned

A similar warning is displayed when the user cannot be mentioned because
they have not been invited to the topic.

* FEATURE: Resolve mentions for new topic

This commit improves several improvements and refactors
/u/is_local_username route to a better /composer/mentions route that
can handle new topics too.

* FEATURE: Show warning if only some are notified

Sometimes users are still notified even if the group that was mentioned
was not invited to the message. This happens because its members were
invited directly or are members of other groups that were invited.

* DEV: Refactor _warnCannotSeeMention
2022-12-05 20:22:05 +02:00
Andrei Prigorshnev
6357a3ce33
FEATURE: User Status API (#19149)
This adds API scope for the user status. This also adds a get method to the user status controller. We didn't need a dedicated method that returns status before because the server returns status with user objects, but I think we need to provide this method for API clients.
2022-11-24 19:16:28 +04:00
Martin Brennan
d3f02a1270
FEATURE: Generic hashtag autocomplete lookup and markdown cooking (#18937)
This commit fleshes out and adds functionality for the new `#hashtag` search and
lookup system, still hidden behind the `enable_experimental_hashtag_autocomplete`
feature flag.

**Serverside**

We have two plugin API registration methods that are used to define data sources
(`register_hashtag_data_source`) and hashtag result type priorities depending on
the context (`register_hashtag_type_in_context`). Reading the comments in plugin.rb
should make it clear what these are doing. Reading the `HashtagAutocompleteService`
in full will likely help a lot as well.

Each data source is responsible for providing its own **lookup** and **search**
method that returns hashtag results based on the arguments provided. For example,
the category hashtag data source has to take into account parent categories and
how they relate, and each data source has to define their own icon to use for the
hashtag, and so on.

The `Site` serializer has two new attributes that source data from `HashtagAutocompleteService`.
There is `hashtag_icons` that is just a simple array of all the different icons that
can be used for allowlisting in our markdown pipeline, and there is `hashtag_context_configurations`
that is used to store the type priority orders for each registered context.

When sending emails, we cannot render the SVG icons for hashtags, so
we need to change the HTML hashtags to the normal `#hashtag` text.

**Markdown**

The `hashtag-autocomplete.js` file is where I have added the new `hashtag-autocomplete`
markdown rule, and like all of our rules this is used to cook the raw text on both the clientside
and on the serverside using MiniRacer. Only on the server side do we actually reach out to
the database with the `hashtagLookup` function, on the clientside we just render a plainer
version of the hashtag HTML. Only in the composer preview do we do further lookups based
on this.

This rule is the first one (that I can find) that uses the `currentUser` based on a passed
in `user_id` for guardian checks in markdown rendering code. This is the `last_editor_id`
for both the post and chat message. In some cases we need to cook without a user present,
so the `Discourse.system_user` is used in this case.

**Chat Channels**

This also contains the changes required for chat so that chat channels can be used
as a data source for hashtag searches and lookups. This data source will only be
used when `enable_experimental_hashtag_autocomplete` is `true`, so we don't have
to worry about channel results suddenly turning up.

------

**Known Rough Edges**

- Onebox excerpts will not render the icon svg/use tags, I plan to address that in a follow up PR
- Selecting a hashtag + pressing the Quote button will result in weird behaviour, I plan to address that in a follow up PR
- Mixed hashtag contexts for hashtags without a type suffix will not work correctly, e.g. #ux which is both a category and a channel slug will resolve to a category when used inside a post or within a [chat] transcript in that post. Users can get around this manually by adding the correct suffix, for example ::channel. We may get to this at some point in future
- Icons will not show for the hashtags in emails since SVG support is so terrible in email (this is not likely to be resolved, but still noting for posterity)
- Additional refinements and review fixes wil
2022-11-21 08:37:06 +10:00
Kris
a6c787345c
UX: reorganize user prefs for experimental user nav (#18764)
Trying out changes to reduce the number of nav items in the experimental horizontal user nav. These changes should only appear with the redesigned_user_page_nav_enabled feature flag.

1. Created a new "Tracking" route. This combines some tracking-related settings from Notifications and Category and Tag tracking (which were separate tabs previously). Don't love the layout yet, but it's something that we can work on.

2. Moved some user-related settings out of Notifications and to the
Users tab. These seem more user-related to me, and it's nice that we can
associate enabling messages with the setting to limit who can send
messages.

3. Moved the App tab (lists app permissions) to be within the Security tab. It's very similar to Recently Used Devices.
2022-11-18 09:09:04 +08:00
Arpit Jalan
8b8c1291e7
FIX: do not preload topic list for new topic/message routes (#18959)
This commit fixes the issue where the sub-category topic list was not
loading for new-topic routes. Since we do not need to preload topic
lists for new topic/message routes this commit adds a no-op controller
that prevents topic lists pre loading and at the same time fixes the sub
category topics not loading issue.
2022-11-09 20:57:42 +05:30
Bianca Nenciu
0be0bcfc7d
FIX: Do not show a 404 page when visiting messages (#18652)
* DEV: Use list controller and action

It used an empty action handler which just returned the app and it
required another request to get the topic list. By using the correct
controller and action we can preload the topic list.
2022-10-20 16:24:56 +03:00
David Taylor
9a4072fe31
DEV: Load plugin CSS in tests (#18668) 2022-10-19 18:10:06 +01:00
Martin Brennan
7c25597da2
FEATURE: Generic hashtag autocomplete part 1 (#18592)
This commit adds a new `/hashtag/search` endpoint and both
relevant JS and ruby plugin APIs to handle plugins adding their
own data sources and priority orders for types of things to search
when `#` is pressed.

A `context` param is added to `setupHashtagAutocomplete` which
a corresponding chat PR https://github.com/discourse/discourse-chat/pull/1302
will now use.

The UI calls `registerHashtagSearchParam` for each context that will
require a `#` search (e.g. the topic composer), for each type of record that
the context needs to search for, as well as a priority order for that type. Core
uses this call to add the `category` and `tag` data sources to the topic composer.

The `register_hashtag_data_source` ruby plugin API call is for plugins to
add a new data source for the hashtag searching endpoint, e.g. discourse-chat
may add a `channel` data source.

This functionality is hidden behind the `enable_experimental_hashtag_autocomplete`
flag, except for the change to `setupHashtagAutocomplete` since only core and
discourse-chat are using that function. Note this PR does **not** include required
changes for hashtag lookup or new styling.
2022-10-19 14:03:57 +10:00
David Taylor
be3d6a56ce
DEV: Introduce minification and source maps for Theme JS (#18646)
Theme javascript is now minified using Terser, just like our core/plugin JS bundles. This reduces the amount of data sent over the network.

This commit also introduces sourcemaps for theme JS. Browser developer tools will now be able show each source file separately when browsing, and also in backtraces.

For theme test JS, the sourcemap is inlined for simplicity. Network load is not a concern for tests.
2022-10-18 18:20:10 +01:00
Jarek Radosz
ae1e536e83
SECURITY: moderator shouldn't be able to import a theme via API (#18418)
* SECURITY: moderator shouldn't be able to import a theme via API.
* DEV: apply `AdminConstraint` for all the "themes" routes.

Co-authored-by: Vinoth Kannan <svkn.87@gmail.com>
2022-09-29 20:00:20 +02:00
Martin Brennan
8ebd5edd1e
DEV: Rename secure_media to secure_uploads (#18376)
This commit renames all secure_media related settings to secure_uploads_* along with the associated functionality.

This is being done because "media" does not really cover it, we aren't just doing this for images and videos etc. but for all uploads in the site.

Additionally, in future we want to secure more types of uploads, and enable a kind of "mixed mode" where some uploads are secure and some are not, so keeping media in the name is just confusing.

This also keeps compatibility with the `secure-media-uploads` path, and changes new
secure URLs to be `secure-uploads`.

Deprecated settings:

* secure_media -> secure_uploads
* secure_media_allow_embed_images_in_emails -> secure_uploads_allow_embed_images_in_emails
* secure_media_max_email_embed_image_size_kb -> secure_uploads_max_email_embed_image_size_kb
2022-09-29 09:24:33 +10:00
Arpit Jalan
2ee721f8aa
FEATURE: add composer warning when user haven't been seen in a long time (#18340)
* FEATURE: add composer warning when user haven't been seen in a long time

When a user creates a PM and adds a recipient that hasn't been seen in a
long time then we'll now show a warning in composer indicating that the
user hasn't been seen in a long time.
2022-09-27 22:06:40 +05:30
Stephen White
6771673a1b
Fix constraints typo in routes config (#17994) 2022-08-24 10:27:05 +08:00
Osama Sayegh
473695ee4d
DEV: Add messages tab to the new user menu (#17850)
Some of the changes in this PR are extracted from https://github.com/discourse/discourse/pull/17379.

Similar to the bookmarks tab in the new user menu, the messages tab also displays a mix of notifications and messages. When there are unread message notifications, the tab displays all of these notifications at the top and fills the remaining space in the menu with a list of the user's messages. The bubble/badge count on the messages tab indicates how many unread message notifications there are.
2022-08-10 08:25:39 +03:00
Osama Sayegh
4fdb275683
DEV: Add bookmarks tab to the new user menu (#17814)
Some of the changes in this commit are extracted from https://github.com/discourse/discourse/pull/17379.

The bookmarks tab in the new user menu is different from the other tabs in that it can display a mixture of notifications and bookmarks. When there are unread bookmark reminder notifications, the tab displays all of these notifications at the top and fills the remaining space in the menu with the rest of the bookmarks. The bubble/badge count on the bookmarks tab indicates how many unread bookmark reminder notifications there are.

On the technical aspect, since this commit introduces a new `bookmark-item` component, we've done some refactoring so that all 3 "item" components (`notification-item`, `reviewable-item` and the new `bookmark-item`) inherit from a base component and get identical HTML structure so they all look consistent.

Internal tickets: t70584 and t65045.
2022-08-08 17:24:04 +03:00
Wolftallemo
f590b62a31
FIX: Accept HEAD requests for mandrill webhook (#17180)
Madrill uses a HEAD request for validation, accept it.
2022-07-29 16:26:31 +10:00
Osama Sayegh
988a175e94
DEV: Add reviewables tab to the new user menu (#17630)
This commit is a subset of the changes proposed in https://github.com/discourse/discourse/pull/17379.
2022-07-28 11:16:33 +03:00
Alan Guo Xiang Tan
3266350e80
FEATURE: Decouple category/tag presence in sidebar from notifi level (#17273) 2022-06-30 14:54:20 +08:00
Jarek Radosz
2c1fc28d00
DEV: Remove ember-cli flags from the backend (#17147)
…and other auxiliary code

* Restore `QUNIT_EMBER_CLI` flag warning
* Add `ALLOW_EMBER_CLI_PROXY_BYPASS`
2022-06-20 16:33:05 +02:00
Andrei Prigorshnev
5c596273a0
FEATURE: user status (#16875) 2022-05-27 13:15:14 +04:00
Angus McLeod
9fc3d46003
Update wordpress scopes and add `session/scopes` endpoint (#15366)
* Update wordpress scopes && add ``session/scopes`` endpointt

* Fix failing spec

* Add users#show scope to discourse_connect

* Update app/controllers/session_controller.rb

Co-authored-by: Roman Rizzi <rizziromanalejandro@gmail.com>

Co-authored-by: Roman Rizzi <rizziromanalejandro@gmail.com>
2022-05-02 12:15:32 -03:00
Roman Rizzi
2a96bca7a1
FIX: Correctly handle the print param on topics#show. (#16555)
The controller incorrectly sets print to true when passing `print=false`, which causes the rate limit to perform.
2022-04-25 16:04:13 -03:00
Roman Rizzi
48417b59d6
FIX: Return a 404 when a sitemap request doesn't have a format (#16506) 2022-04-19 11:07:25 -03:00
Roman Rizzi
6f76a12e0a
FEATURE: Let sites add a sitemap.xml file. (#16357)
* FEATURE: Let sites add a sitemap.xml file.

This PR adds the same features discourse-sitemap provides to core. Sitemaps are only added to the robots.txt file if the `enable_sitemap` setting is enabled and `login_required` disabled.

After merging discourse/discourse-sitemap#34, this change will take priority over the sitemap plugin because it will disable itself. We're also using the same sitemaps table, so our migration won't try to create it
again using `if_not_exists: true`.
2022-04-12 10:33:59 -03:00
Alan Guo Xiang Tan
0f7b9878ff SECURITY: Category group permissions leaked to normal users.
After this commit, category group permissions can only be seen by users
that are allowed to manage a category. In the past, we inadvertently
included a category's group permissions settings in `CategoriesController#show`
and `CategoriesController#find_by_slug` endpoints for normal users when
those settings are only a concern to users that can manage a category.
2022-04-08 13:46:20 +08:00
David Taylor
daacb3b038 FIX: Ensure all/none subcategory filters work correctly with tags
This is done by defining a `/all` route for use when a category's default filter is 'none'. This was defined for regular category routes in 3e7f7fdd, but not for tag routes.

This commit also corrects the route name TagsShowNoneCategory*Route -> TagsShowCategoryNone*Route, which fixes an error when setting subcategories=none while filtering by tags.
2022-03-22 15:26:00 +00:00
Blake Erickson
02fa04e333
FIX: Update topic route id param (#16166)
This update topic route has never worked. Better late than never. I am
in favor of using non-slug urls when using the api so I do think we
should fix this route.

Just thought I would update the `:id` param to `:topic_id` here in the
routes file instead of updating the controller to handle both params.

Added a spec to test this route.

Also added the same constraint we have on other topic routes to ensure
we only pass in an ID that is a digit.
2022-03-11 11:01:08 -07:00
Dan Ungureanu
e3b4998efc
DEV: Remove notify user topic from share modal (#16085)
This feature was rarely used, could be used for spamming users and was
impossible to add a context to why the user was notified of a topic. A
simple private messages that includes the link and personalized message
can be used instead.
2022-03-03 09:27:45 +11:00
Osama Sayegh
dd6ec65061
FEATURE: Centralized 2FA page (#15377)
2FA support in Discourse was added and grown gradually over the years: we first
added support for TOTP for logins, then we implemented backup codes, and last
but not least, security keys. 2FA usage was initially limited to logging in,
but it has been expanded and we now require 2FA for risky actions such as
adding a new admin to the site.

As a result of this gradual growth of the 2FA system, technical debt has
accumulated to the point where it has become difficult to require 2FA for more
actions. We now have 5 different 2FA UI implementations and each one has to
support all 3 2FA methods (TOTP, backup codes, and security keys) which makes
it difficult to maintain a consistent UX for these different implementations.
Moreover, there is a lot of repeated logic in the server-side code behind these
5 UI implementations which hinders maintainability even more.

This commit is the first step towards repaying the technical debt: it builds a
system that centralizes as much as possible of the 2FA server-side logic and
UI. The 2 main components of this system are:

1. A dedicated page for 2FA with support for all 3 methods.
2. A reusable server-side class that centralizes the 2FA logic (the
`SecondFactor::AuthManager` class).

From a top-level view, the 2FA flow in this new system looks like this:

1. User initiates an action that requires 2FA;

2. Server is aware that 2FA is required for this action, so it redirects the
user to the 2FA page if the user has a 2FA method, otherwise the action is
performed.

3. User submits the 2FA form on the page;

4. Server validates the 2FA and if it's successful, the action is performed and
the user is redirected to the previous page.

A more technically-detailed explanation/documentation of the new system is
available as a comment at the top of the `lib/second_factor/auth_manager.rb`
file. Please note that the details are not set in stone and will likely change
in the future, so please don't use the system in your plugins yet.

Since this is a new system that needs to be tested, we've decided to migrate
only the 2FA for adding a new admin to the new system at this time (in this
commit). Our plan is to gradually migrate the remaining 2FA implementations to
the new system.

For screenshots of the 2FA page, see PR #15377 on GitHub.
2022-02-17 12:12:59 +03:00
David Taylor
07893779df
DEV: Correct service-worker sourceMappingURL (#15916)
We serve `service-worker.js` in an unusual way, which means that the sourcemap is not available on an adjacent path. This means that the browser fails to fetch the map, and shows an error in the console.

This commit re-writes the source map reference in the static_controller to be an absolute link to the asset (including the appropriate CDN, if enabled), and adds a spec for the behavior.

It's important to do this at runtime, rather than JS precompile time, so that changes to CDN configuration do not require re-compilation to take effect.
2022-02-14 12:47:56 +00:00
Blake Erickson
71f7f7ed49
FEATURE: Add external_id to topics (#15825)
* FEATURE: Add external_id to topics

This commit allows for topics to be created and fetched by an
external_id. These changes are API only for now as there aren't any
front changes.

* add annotations

* add external_id to this spec

* Several PR feedback changes

- Add guardian to find topic
- 403 is returned for not found as well now
- add `include_external_id?`
- external_id is now case insensitive
- added test for posts_controller
- added test for topic creator
- created constant for max length
- check that it redirects to the correct path
- restrain external id in routes file

* remove puts

* fix tests

* only check for external_id in webhook if exists

* Update index to exclude external_id if null

* annotate

* Update app/controllers/topics_controller.rb

We need to check whether the topic is present first before passing it to the guardian.

Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>

* Apply suggestions from code review

Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>

Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>
2022-02-08 20:55:32 -07:00
Osama Sayegh
9bfe5e58d3
Revert "DEV: Add context in AdminConstraint (#15838)" (#15845)
This reverts commit 492226a973.
2022-02-07 21:05:19 +03:00
Osama Sayegh
492226a973
DEV: Add context in AdminConstraint (#15838)
This allows plugins to override the permissions required to access
specific things like the Logster and Sidekiq web UI without the changes
leaking to the rest of Discourse routes.
2022-02-07 16:25:31 +03:00
Bianca Nenciu
5d35c38db2
FEATURE: Search screened IP address in blocks (#15461)
An admin could search for all screened ip addresses in a block by
using wildcards. 192.168.* returned all IPs in range 192.168.0.0/16.
This feature allows admins to search for a single IP address in all
screened IP blocks. 192.168.0.1 returns all IP blocks that match it,
for example 192.168.0.0/16.

* FEATURE: Remove roll up button for screened IPs

* FIX: Match more specific screened IP address first
2022-01-11 09:16:51 +02:00
Angus McLeod
df3886d6e5
FEATURE: Experimental support for group membership via google auth (#14835)
This commit introduces a new site setting "google_oauth2_hd_groups". If enabled, group information will be fetched from Google during authentication, and stored in the Discourse database. These 'associated groups' can be connected to a Discourse group via the "Membership" tab of the group preferences UI. 

The majority of the implementation is generic, so we will be able to add support to more authentication methods in the near future.

https://meta.discourse.org/t/managing-group-membership-via-authentication/175950
2021-12-09 12:30:27 +00:00
Loïc Guitaut
a5fbb90df4 FEATURE: Display pending posts on user’s page
Currently when a user creates posts that are moderated (for whatever
reason), a popup is displayed saying the post needs approval and the
total number of the user’s pending posts. But then this piece of
information is kind of lost and there is nowhere for the user to know
what are their pending posts or how many there are.

This patch solves this issue by adding a new “Pending” section to the
user’s activity page when there are some pending posts to display. When
there are none, then the “Pending” section isn’t displayed at all.
2021-11-29 10:26:33 +01:00
Penar Musaraj
d99deaf1ab
FEATURE: show recent searches in quick search panel (#15024) 2021-11-25 15:44:15 -05:00
Martin Brennan
b96c10a903
DEV: Extract shared external upload routes into controller helper (#14984)
This commit refactors the direct external upload routes (get presigned
put, complete external, create/abort/complete multipart) into a
helper which is then included in both BackupController and the
UploadController. This is done so UploadController doesn't need
strange backup logic added to it, and so each controller implementing
this helper can do their own validation/error handling nicely.

This is a follow up to e4350bb966
2021-11-18 09:17:23 +10:00
Krzysztof Kotlarek
9062fd9b7a
FIX: improvements for download local dates (#14588)
* FIX: do not display add to calendar for past dates

There is no value in saving past dates into calendar

* FIX: remove postId and move ICS to frontend

PostId is not necessary and will make the solution more generic for dates which doesn't belong to a specific post.

Also, ICS file can be generated in JavaScript to avoid calling backend.
2021-10-14 09:22:44 +11:00
Rafael dos Santos Silva
3eb737c014
FIX: Correct password change path for password managers (#14561) 2021-10-08 14:53:14 -03:00
Krzysztof Kotlarek
cb5b0cb9d8
FEATURE: save local date to calendar (#14486)
It allows saving local date to calendar.
Modal is giving option to pick between ics and google. User choice can be remembered as a default for the next actions.
2021-10-06 14:11:52 +11:00
Alan Guo Xiang Tan
9d5da2b383
PERF: Revert all inboxes from messages route. (#14445)
The all inboxes was introduced in
016efeadf6 but we decided to roll it back
for performance reasons. The main performance challenge here is that PG
has to basically loop through all the PMs that a user is allowed to view
before being able to order by `Topic#bumped_at`. The all inboxes was not
planned as part of the new/unread filter so we've decided not to tackle
the performance issue for the upcoming release.

Follow-up to 016efeadf6
2021-09-28 11:58:04 +08:00
Dan Ungureanu
f517b6997c
FEATURE: Cook drafts excerpt in user activity (#14315)
The previous excerpt was a simple truncated raw message. Starting with
this commit, the raw content of the draft is cooked and an excerpt is
extracted from it. The logic for extracting the excerpt mimics the the
`ExcerptParser` class, but does not implement all functionality, being
a much simpler implementation.

The two draft controllers have been merged into one and the /draft.json
route has been changed to /drafts.json to be consistent with the other
route names.
2021-09-14 15:18:01 +03:00
David Taylor
31db83527b DEV: Introduce PresenceChannel API for core and plugin use
PresenceChannel aims to be a generic system for allow the server, and end-users, to track the number and identity of users performing a specific task on the site. For example, it might be used to track who is currently 'replying' to a specific topic, editing a specific wiki post, etc.

A few key pieces of information about the system:
- PresenceChannels are identified by a name of the format `/prefix/blah`, where `prefix` has been configured by some core/plugin implementation, and `blah` can be any string the implementation wants to use.
- Presence is a boolean thing - each user is either present, or not present. If a user has multiple clients 'present' in a channel, they will be deduplicated so that the user is only counted once
- Developers can configure the existence and configuration of channels 'just in time' using a callback. The result of this is cached for 2 minutes.
- Configuration of a channel can specify permissions in a similar way to MessageBus (public boolean, a list of allowed_user_ids, and a list of allowed_group_ids). A channel can also be placed in 'count_only' mode, where the identity of present users is not revealed to end-users.
- The backend implementation uses redis lua scripts, and is designed to scale well. In the future, hard limits may be introduced on the maximum number of users that can be present in a channel.
- Clients can enter/leave at will. If a client has not marked itself 'present' in the last 60 seconds, they will automatically 'leave' the channel. The JS implementation takes care of this regular check-in.
- On the client-side, PresenceChannel instances can be fetched from the `presence` ember service. Each PresenceChannel can be used entered/left/subscribed/unsubscribed, and the service will automatically deduplicate information before interacting with the server.
- When a client joins a PresenceChannel, the JS implementation will automatically make a GET request for the current channel state. To avoid this, the channel state can be serialized into one of your existing endpoints, and then passed to the `subscribe` method on the channel.
- The PresenceChannel JS object is an ember object. The `users` and `count` property can be used directly in ember templates, and in computed properties.
- It is important to make sure that you `unsubscribe()` and `leave()` any PresenceChannel objects after use

An example implementation may look something like this. On the server:

```ruby
register_presence_channel_prefix("site") do |channel|
  next nil unless channel == "/site/online"
  PresenceChannel::Config.new(public: true)
end
```

And on the client, a component could be implemented like this:

```javascript
import Component from "@ember/component";
import { inject as service } from "@ember/service";

export default Component.extend({
  presence: service(),
  init() {
    this._super(...arguments);
    this.set("presenceChannel", this.presence.getChannel("/site/online"));
  },
  didInsertElement() {
    this.presenceChannel.enter();
    this.presenceChannel.subscribe();
  },
  willDestroyElement() {
    this.presenceChannel.leave();
    this.presenceChannel.unsubscribe();
  },
});
```

With this template:

```handlebars
Online: {{presenceChannel.count}}
<ul>
  {{#each presenceChannel.users as |user|}} 
    <li>{{avatar user imageSize="tiny"}} {{user.username}}</li>
  {{/each}}
</ul>
```
2021-08-27 16:26:06 +01:00
Alan Guo Xiang Tan
f66007ec83
FEATURE: Display unread and new counts for messages. (#14059)
There are certain design decisions that were made in this commit.

Private messages implements its own version of topic tracking state because there are significant differences between regular and private_message topics. Regular topics have to track categories and tags while private messages do not. It is much easier to design the new topic tracking state if we maintain two different classes, instead of trying to mash this two worlds together.

One MessageBus channel per user and one MessageBus channel per group. This allows each user and each group to have their own channel backlog instead of having one global channel which requires the client to filter away unrelated messages.
2021-08-25 11:17:56 +08:00