Fix: URL-parameter language disables the language picker, fix #1506

src/Logic/State/UserRelatedState.ts

@@ -15,6 +15,7 @@ import Locale from "../../UI/i18n/Locale"
 import LinkToWeblate from "../../UI/Base/LinkToWeblate"
 import FeatureSwitchState from "./FeatureSwitchState"
 import Constants from "../../Models/Constants"
+import { QueryParameters } from "../Web/QueryParameters"
 
 /**
  * The part of the state which keeps track of user-related stuff, e.g. the OSM-connection,
@@ -93,13 +94,21 @@ export default class UserRelatedState {
             this.osmConnection.GetLongPreference("identity", "mangrove")
         )
 
-        this.language.addCallbackAndRunD((language) => Locale.language.setData(language))
-
         this.installedUserThemes = this.InitInstalledUserThemes()
 
         this.homeLocation = this.initHomeLocation()
 
         this.preferencesAsTags = this.initAmendedPrefs(layout, featureSwitches)
+
+        this.syncLanguage()
+    }
+
+    private syncLanguage() {
+        if (QueryParameters.wasInitialized("language")) {
+            return
+        }
+
+        this.language.addCallbackAndRunD((language) => Locale.language.setData(language))
     }
 
     private static initUserRelatedState(): LayerConfig {
@@ -246,6 +255,10 @@ export default class UserRelatedState {
             amendedPrefs.data["__userjourney_" + key] = Constants.userJourney[key]
         }
 
+        for (const key of QueryParameters.initializedParameters()) {
+            amendedPrefs.data["__url_parameter_initialized:" + key] = "yes"
+        }
+
         const osmConnection = this.osmConnection
         osmConnection.preferencesHandler.preferences.addCallback((newPrefs) => {
             for (const k in newPrefs) {
@@ -268,6 +281,7 @@ export default class UserRelatedState {
         })
         const usersettingsConfig = UserRelatedState.usersettingsConfig
         const translationMode = osmConnection.GetPreference("translation-mode")
+
         Locale.language.mapD(
             (language) => {
                 amendedPrefs.data["_language"] = language

src/Logic/Web/QueryParameters.ts

@@ -71,6 +71,9 @@ export class QueryParameters {
         this.init()
         return QueryParameters._wasInitialized.has(key)
     }
+    public static initializedParameters(): ReadonlyArray<string> {
+        return Array.from(QueryParameters._wasInitialized.keys())
+    }
 
     private static addOrder(key) {
         if (this.order.indexOf(key) < 0) {