discourse/docs/CHANGELOG-JAVASCRIPT-PLUGIN-API.md
Sérgio Saquetim 7b14cd98c7
DEV: Add behavior transformers (#27409)
This commit introduces the `behaviorTransformer` API to safely override behaviors defined in Discourse.

Two new plugin APIs are introduced:

- `addBehaviorTransformerName` which allows plugins and theme-components to add a new valid transformer name if they want to provide overridable behaviors;
- `registerBehaviorTransformer` to register a transformer to override behaviors.

It also introduces the function `applyBehaviorTransformer` which can be imported from `discourse/lib/transformer`. This is used to mark a callback containing the desired behavior as overridable and applies the transformer logic.

How does it work?

## Marking a behavior as overridable:
 
To mark a behavior as overridable, in Discourse core, first the transformer name must be added to `app/assets/javascripts/discourse/app/lib/transformer/registry.js`. For plugins and theme-components, use the plugin API `addBehaviorTransformerName` instead.

Then, in your component or class, use the function `applyBehaviorTransformer` to mark the Behavior as overridable and handle the logic:

- example:

```js
  ...
  @action
  loadMore() {
    applyBehaviorTransformer(
      "discovery-topic-list-load-more",
      () => {
        this.documentTitle.updateContextCount(0);
        return this.model
          .loadMore()
          .then(({ moreTopicsUrl, newTopics } = {}) => {
            if (
              newTopics &&
              newTopics.length &&
              this.bulkSelectHelper?.bulkSelectEnabled
            ) {
              this.bulkSelectHelper.addTopics(newTopics);
            }
            if (moreTopicsUrl && $(window).height() >= $(document).height()) {
              this.send("loadMore");
            }
          });
      },
      { model: this.model }
    );
  },
  ...	
```

## Overriding a behavior in plugins or themes

To override a behavior in plugins, themes, or TCs use the plugin API `registerBehaviorTransformer`:

- Example:

```js
withPluginApi("1.35.0", (api) => {
  api.registerBehaviorTransformer("example-transformer", ({ context, next }) => {
    console.log('we can introduce new behavior here instead', context);

    next(); // call next to execute the expected behavior
  });
});
```
2024-07-31 16:39:22 -03:00

11 KiB

Changelog

All notable changes to the Discourse JavaScript plugin API located at
app/assets/javascripts/discourse/app/lib/plugin-api.js will be described
in this file.

The format is based on Keep a Changelog,
and this project adheres to Semantic Versioning.

[1.35.0] - 2024-07-30

  • Added registerBehaviorTransformer which allows registering a transformer callback to override behavior defined in Discourse modules
  • Added addBehaviorTransformerName which allows plugins/TCs to register a new transformer to override behavior defined in their modules

[1.34.0] - 2024-06-06

  • Added registerValueTransformer which allows registering a transformer callback to override values defined in Discourse modules
  • Added addValueTransformerName which allows plugins/TCs to register a new transformer to override values defined in their modules

[1.33.0] - 2024-06-06

  • Added addCustomUserFieldValidationCallback which allows to set a callback to change the validation and user facing message when attempting to save the signup form.

[1.32.0] - 2024-05-16

  • Added registerHomeLogoHrefCallback which allows to set a callback to change the home logo URL.

[1.31.0] - 2024-04-22

  • Added addTopicAdminMenuButton which allows to register a new button in the topic admin menu.

[1.30.0] - 2024-03-20

  • Added addAdminPluginConfigurationNav, which defines a list of links used in the adminPlugins.show page for a specific plugin, and displays them either in an inner sidebar or in a top horizontal nav.

[1.29.0] - 2024-03-05

  • Added headerButtons which allows for manipulation of the header buttons. This includes, adding, removing, or modifying the order of buttons.

[1.28.0] - 2024-02-21

  • Added headerIcons which allows for manipulation of the header icons. This includes, adding, removing, or modifying the order of icons.

[1.27.0] - 2024-02-21

  • Deprecated addToHeaderIcons in favor of headerIcons

[1.26.0] - 2024-02-21

  • Added renderBeforeWrapperOutlet which is used for rendering components before the content of wrapper plugin outlets
  • Added renderAfterWrapperOutlet which is used for rendering components after the content of wrapper plugin outlets

[1.25.0] - 2024-02-05

  • Added addComposerImageWrapperButton which is used to add a custom button to the composer preview's image wrapper that appears on hover of an uploaded image.

[1.24.0] - 2024-01-08

  • Added addAdminSidebarSectionLink which is used to add a link to a specific admin sidebar section, as a replacement for the admin-menu plugin outlet. This only has an effect if the admin_sidebar_enabled_groups site setting is in use, which enables the new admin nav sidebar.

[1.23.0] - 2024-01-03

Added

  • Added setUserMenuNotificationsLimit function which is used to specify a new limit for the notifications query when the user menu is opened.

[1.21.0] - 2023-12-22

Added

  • Added includeUserFieldPropertiesOnSave function, which includes the passed user field properties in the user field save request. This is useful for plugins that are adding additional columns to the user field model and want to save the new property values alongside the default user field properties (all under the same save call).

[1.20.0] - 2023-12-20

Added

  • Added addSearchMenuAssistantSelectCallback function, which is used to override the behavior of clicking a search menu assistant item. If any callback returns false, the core behavior will not be executed.

[1.19.0] - 2023-12-13

Added

  • Added setNotificationsLimit function, which sets a new limit for how many notifications are loaded for the user notifications route

  • Added addBeforeLoadMoreNotificationsCallback function, which takes a function as the argument. All added callbacks are evaluated before loadMore is triggered for user notifications. If any callback returns false, notifications will not be loaded.

[1.18.0] - 2023-12-1

Added

  • Added setDesktopTopicTimelineScrollAreaHeight function, which takes an object with min/max key value pairs as an argument. This is used to adjust the height of the topic timeline on desktop without CSS hacks that break the functionality of the topic timeline.

[1.17.0] - 2023-11-30

Added

  • Introduces forceDropdownAnimationForMenuPanels API for forcing one or many Menu Panels (search-menu, user-menu, etc) to be rendered as a dropdown. This can be useful for plugins as the default behavior is to add a 'slide-in' behavior to a menu panel if you are viewing on a small screen. eg. mobile.

[1.16.0] - 2023-11-17

Added

[1.15.0] - 2023-10-18

Added

  • Added hidden option to addSidebarPanel, this can be used to remove the panel from combined sidebar mode as well as hiding its switch button. Useful for cases where only one sidebar should be shown at a time regardless of other panels.
  • Added getSidebarPanel function, which returns the current sidebar panel object for comparison.

[1.14.0] - 2023-10-06

Added

  • Added addComposerToolbarPopupMenuOption as a replacement for addToolbarPopupMenuOptionsCallback with new changes
    introduced to the method's signature.

Changed

  • Deprecate addToolbarPopupMenuOptionsCallback in favor of addComposerToolbarPopupMenuOption.

[1.13.0] - 2023-10-05

Added

  • Introduces renderInOutlet API for rendering components into plugin outlets

[1.12.0] - 2023-09-06

Added

  • Adds addPostAdminMenuButton which allows to register a new button in the post admin menu.

[1.11.0] - 2023-08-30

Added

  • Adds addBeforeAuthCompleteCallback which allows plugins and themes to add functions to be
    evaluated before the auth-complete logic is run. If any of these callbacks return false, the
    auth-complete logic will be aborted.

[1.10.0] - 2023-08-25

Added

  • Adds registerReviewableActionModal which allows core and plugins to register a modal component class
    which is used to show a modal for certain reviewable actions.

[1.9.0] - 2023-08-09

Added

  • Adds showSidebarSwitchPanelButtons which is experimental, and allows plugins to show sidebar switch panel buttons in separated mode

  • Adds hideSidebarSwitchPanelButtons which is experimental, and allows plugins to hide sidebar switch panel buttons in separated mode

[1.8.1] - 2023-08-08

Added

  • Adds replacePostMenuButton which allows plugins to replace a post menu button with a widget.

[1.8.0] - 2023-07-18

Added

  • Adds addSidebarPanel which is experimental, and adds a Sidebar panel by returning a class which extends from the
    BaseCustomSidebarPanel class.

  • Adds setSidebarPanel which is experimental, and sets the current sidebar panel.

[1.7.1] - 2023-07-18

Added

  • Adds addBulkActionButton which adds actions to the Bulk Topic modal

[1.7.0] - 2023-07-17

Added

  • Adds addCommunitySectionLink which allows plugins to add a navigation link to the Sidebar community section under
    the "More..." links drawer.

  • Adds registerUserCategorySectionLinkCountable which allows plugins to register a new countable for section links
    under Sidebar Categories section on top of the default countables of unread topics count and new topics count.

  • Adds registerCustomCategorySectionLinkLockIcon which allows plugins to change the lock icon used for a sidebar
    category section link to indicate that a category is read restricted.

  • Adds registerCustomCategorySectionLinkPrefix which allows plugins to register a custom prefix for a sidebar category
    section link.

  • Adds registerCustomTagSectionLinkPrefixValue which allows plugins to register a custom prefix for a sidebar tag
    section link.

  • Adds refreshUserSidebarCategoriesSectionCounts which allows plugins to trigger a refresh of the counts for all
    category section links under the categories section for a logged in user.

  • Adds addSidebarSection which allows plugins to add a Sidebar section.

  • Adds registerNotificationTypeRenderer which allows plugins to register a custom renderer for a notification type
    or override the renderer of an existing type. See lib/notification-types/base.js for documentation and the default
    renderer.

  • Adds registerModelTransformer which allows plugins to apply transformation using a callback on a list of model
    instances of a specific type. Currently, this API only works on lists rendered in the user menu such as notifications,
    bookmarks and topics (i.e. messages), but it may be extended to other lists in other parts of the app.

  • Adds addUserMessagesNavigationDropdownRow which allows plugins to add a row to the dropdown used on the
    userPrivateMessages route used to navigate between the different user messages pages.

[1.6.0] - 2022-12-13

Added

  • Adds addPostSmallActionClassesCallback, which allows users to register a custom
    function that adds a class to small action posts (pins, closing topics, etc)

[1.5.0] - 2022-11-21

Added

  • Adds addComposerSaveErrorCallback, which allows users to register custom error handling
    for server-side errors when submitting on the composer.

[1.4.0] - 2022-09-27

Added

[1.3.0] - 2022-05-29

Added

  • N/A - Mistakenly bumped.

[1.2.0] - 2022-03-18

Added

  • Adds registerCustomLastUnreadUrlCallback, which allows users to register a custom
    function that returns a last unread url for a topic list item. When multiple callbacks
    are registered, the first non-null value that is returned will be used.

[1.1.0] - 2021-12-15

Added

  • Adds addPosterIcons, which allows users to add multiple icons to a poster. The
    addition of this function also makes the existing addPosterIcon now an alias to this
    function. Users may now just use addPosterIcons for both one or many icons. This
    function allows users to now return many icons depending on an attrs.

[1.0.0] - 2021-11-25

Removed

  • Removes the addComposerUploadProcessor function, which is no longer used in
    favour of addComposerUploadPreProcessor. The former was used to add preprocessors
    for client side uploads via jQuery file uploader (described at
    https://github.com/blueimp/jQuery-File-Upload/wiki/Options#file-processing-options).
    The new addComposerUploadPreProcessor adds preprocessors for client side
    uploads in the form of an Uppy plugin. See https://uppy.io/docs/writing-plugins/
    for the Uppy documentation, but other examples of preprocessors in core can be found
    in the UppyMediaOptimization and UppyChecksum classes. This has been done because
    of the overarching move towards Uppy in the Discourse codebase rather than
    jQuery fileupload, which will eventually be removed altogether as a broader effort
    to remove jQuery from the codebase.

Changed

  • Changes addComposerUploadHandler's behaviour. Instead of being only usable
    for single files at a time, now multiple files are sent to the upload handler
    at once. These multiple files are sent based on the groups in which they are
    added (e.g. multiple files selected from the system upload dialog, or multiple
    files dropped in to the composer). Files will be sent in buckets to the handlers
    they match.