New fullscreen chat WIP:

* Fullscreen chat: now uses a custom page (in other words: when opening the chat in a new tab, you will have the Peertube menu). WIP
* some code refactoring (getBaseRoute moved to util/uri, ...)

server/lib/conversejs/params.ts

@@ -1,5 +1,5 @@
 import type { RegisterServerOptions, MVideoThumbnail, SettingEntries } from '@peertube/peertube-types'
-import type { ConverseJSTheme, InitConverseJSParams } from '../../../shared/lib/types'
+import type { ConverseJSTheme, InitConverseJSParams, InitConverseJSParamsError } from '../../../shared/lib/types'
 import type { RegisterServerOptionsV5 } from '../helpers'
 import type { LiveChatJSONLDAttributeV1 } from '../federation/types'
 import { getChannelInfosById, getChannelNameById } from '../database/channel'
@@ -11,12 +11,6 @@ import { getBaseRouterRoute, getBaseStaticRoute } from '../helpers'
 import { getProsodyDomain } from '../prosody/config/domain'
 import { getBoshUri, getWSUri } from '../uri/webchat'
 
-interface InitConverseJSParamsError {
-  isError: true
-  code: 404 | 403 | 500
-  message: string
-}
-
 interface GetConverseJSParamsParams {
   readonly?: boolean | 'noscroll'
   transparent?: boolean

server/lib/routers/api/configuration.ts

@@ -10,10 +10,24 @@ import {
   storeChannelConfigurationOptions
 } from '../../configuration/channel/storage'
 import { sanitizeChannelConfigurationOptions } from '../../configuration/channel/sanitize'
+import { getConverseJSParams } from '../../../lib/conversejs/params'
 
 async function initConfigurationApiRouter (options: RegisterServerOptions, router: Router): Promise<void> {
   const logger = options.peertubeHelpers.logger
 
+  router.get('/configuration/room/:roomKey', asyncMiddleware(
+    async (req: Request, res: Response, _next: NextFunction): Promise<void> => {
+      const roomKey = req.params.roomKey
+      const initConverseJSParam = await getConverseJSParams(options, roomKey, {})
+      if (('isError' in initConverseJSParam) && initConverseJSParam.isError) {
+        res.sendStatus(initConverseJSParam.code)
+        return
+      }
+      res.status(200)
+      res.json(initConverseJSParam)
+    }
+  ))
+
   router.get('/configuration/channel/:channelId', asyncMiddleware([
     checkConfigurationEnabledMiddleware(options),
     getCheckConfigurationChannelMiddleware(options),