This is probably the most complicated way I could find to fix#1587.
Jokes aside, this was done with a few goals in mind:
- Reduce coupling between the installer and the rest of Flarum's
"Application", which we are building during installation.
- Move the installer logic to several smaller classes, which can then
be used by the web frontend and the console task, instead of the
former hacking its way into the latter to be "DRY".
- Separate installer infrastructure (the "pipeline", with the ability
to revert steps upon failure) from the actual steps being taken.
The problem was conceptual, and would certainly re-occur in a similar
fashion if we wouldn't tackle it at its roots.
It is fixed now, because we no longer use the ExtensionManager for
enabling extensions, but instead duplicate some of its logic. That is
fine because we don't want to do everything it does, e.g. omit
extenders' lifecycle hooks (which depend on the Application instance
being complete).
> for each desired change, make the change easy (warning: this may be
> hard), then make the easy change
- Kent Beck, https://twitter.com/kentbeck/status/250733358307500032Fixes#1587.
This is important because extensions may wish to render post content
differently depending on Request factors such as the actor. For example,
an attachments extension might wish to hide attachments from guests.
This solution is a bit of a hack-job for now, but soon when we refactor
the API layer to use tobscure/json-api-server, and also refactor the
Formatter layer, it can be revised.
The event subscriber approach means that dependencies have to be
injected (and thus instantiated, along with all *their* dependencies) at
the time of registering event listeners - even when events are never
fired within a request's lifecycle.
This is unnecessary and causes more classes than necessary to be loaded.
In this case, we can explicitly register event listeners that will
resolve their dependencies when the event is fired, not before.
Refs #1578.
We had added a `storage/locale` directory to our skeleton, but we had
forgotten to hook it up with the translator. Enabling caching saves
parsing that locale YAML files on every pageload which should be good
for performance.
The locale cache will be cleared whenever an extension that uses the
`Locales` or `LanguagePack` extenders is enabled/disabled. If debug
mode is ON, then the caching mechanism will automatically check if any
of the loaded YAML files are dirty and update accordingly.
wrap() only adds a table prefix when referencing a column with a table
name (such as `foo.bar`) - when only a single identifier is provided, it
is assumed to be a column name, which does not need a prefix.
Fixes#1659.
