Specifically:
```
JS 2.1.1 (Linux 0.0.0) joining a room over federation should not get stuck at a spinner FAILED
Did not find exactly one match (found: 0) for componentType:function (props, context, updater) {
```
actually meant that the room directory wasn't displayed - probably because the dispatch `view_room_directory` ended up on another tick of the event loop, meaning that the directory wasn't displayedi. The fix attempted in ths commit is to use `this._setPage` instead to view the directory. This uses `setState` to set the screen to the directory, so I'm not entirely convinced this will solve the problem (as `setState` may also end up doing things on another tick.
and
```
JS 2.1.1 (Linux 0.0.0) loading: MatrixClient rehydrated from stored credentials: shows a room view if we followed a room link FAILED
MatrixChat still not ready after 5 tries
awaitRoomView@/home/travis/build/vector-im/riot-web/test/all-tests.js:201363:90
```
was happening probably because in the handler for the `sync` event in `MatrixChat` (around line 840), there was one case in which the `ready` state may not be true (causing all 5 attempts to fail), and this case relied on `starting_room_alias_payload`. This `starting_room_alias_payload` is now redundant because of `initialScreenAfterLogin`, which was added recently.
To prevent the login screen from flashing when refreshing the app, use some state to indicate that a login is in progress, and OR that with the existing `loading` boolean to show the `<Spinner>` instead of the default `<Login>`.
This might be too invasive, and a default spinner may be better.
_onLoadCompleted happens straight away because Lifecycle finishes loading the session instantly when registration parameters (client_secret etc.) are set.
This follows from a small amount of refactoring done when RTS was introduced. Instead of setting the screen after sync, do it only after login.
This requires as-yet-to-be-PRd riot-web changes.
This includes:
- initialScreenAfterLogin, which can be used to set the screen after login, and represents the screen that would be viewed if the window.location at the time of initialising Riot were routed.
- guestCreds are now part of state, because otherwise they don't cause the login/registration views to update when set.
- instead of worrying about races and using this._setPage, use a dispatch.
Use the on_logged_in dispatch instead. Call setPage in one place, _onLoggedIn, when deciding which page to view on login. Change some require to import, var to const. Remove onTeamMemberRegistered and just use a nullable argument to onRegistered
For example, if someone ends up on /home somehow, just redirect to the directory instead of displaying a very awkward "File not found" plain text in the home page iFrame.
Use the first path segment to key off config.teamTokenMap, which contains a mapping to teamTokens. The client then behaves as before, keeping the path in the address bar constant with no redirects required.
