Move unofficial theme logic into UserRelatedState; fix updating of longPreferences

Logic/Osm/OsmPreferences.ts

@@ -1,10 +1,12 @@
 import {UIEventSource} from "../UIEventSource";
 import UserDetails, {OsmConnection} from "./OsmConnection";
 import {Utils} from "../../Utils";
+import {DomEvent} from "leaflet";
+import preventDefault = DomEvent.preventDefault;
 
 export class OsmPreferences {
 
-    public preferences = new UIEventSource<any>({}, "all-osm-preferences");
+    public preferences = new UIEventSource<Record<string, string>>({}, "all-osm-preferences");
     private readonly preferenceSources = new Map<string, UIEventSource<string>>()
     private auth: any;
     private userDetails: UIEventSource<UserDetails>;
@@ -35,7 +37,7 @@ export class OsmPreferences {
 
         const allStartWith = prefix + key + "-combined";
         // Gives the number of combined preferences
-        const length = this.GetPreference(allStartWith + "-length", "");
+        const length = this.GetPreference(allStartWith + "-length", "", "");
 
        if( (allStartWith + "-length").length > 255){
            throw "This preference key is too long, it has "+key.length+" characters, but at most "+(255 - "-length".length - "-combined".length - prefix.length)+" characters are allowed"
@@ -51,10 +53,10 @@ export class OsmPreferences {
                 let count = parseInt(length.data);
                 for (let i = 0; i < count; i++) {
                     // Delete all the preferences
-                    self.GetPreference(allStartWith + "-" + i, "")
+                    self.GetPreference(allStartWith + "-" + i, "", "")
                         .setData("");
                 }
-                self.GetPreference(allStartWith + "-length", "")
+                self.GetPreference(allStartWith + "-length", "", "")
                     .setData("");
                 return
             }
@@ -67,7 +69,7 @@ export class OsmPreferences {
                 if (i > 100) {
                     throw "This long preference is getting very long... "
                 }
-                self.GetPreference(allStartWith + "-" + i, "").setData(str.substr(0, 255));
+                self.GetPreference(allStartWith + "-" + i, "","").setData(str.substr(0, 255));
                 str = str.substr(255);
                 i++;
             }
@@ -107,6 +109,9 @@ export class OsmPreferences {
     }
 
     public GetPreference(key: string, defaultValue : string = undefined, prefix: string = "mapcomplete-"): UIEventSource<string> {
+        if(key.startsWith(prefix) && prefix !== ""){
+            console.trace("A preference was requested which has a duplicate prefix in its key. This is probably a bug")
+        }
         key = prefix + key;
         key = key.replace(/[:\\\/"' {}.%]/g, '')
         if (key.length >= 255) {
@@ -147,7 +152,7 @@ export class OsmPreferences {
                 const matches = prefixes.some(prefix => key.startsWith(prefix))
                 if (matches) {
                     console.log("Clearing ", key)
-                    self.GetPreference(key, "").setData("")
+                    self.GetPreference(key, "", "").setData("")
 
                 }
             }

Logic/State/UserRelatedState.ts

@@ -12,6 +12,7 @@ import {Changes} from "../Osm/Changes";
 import ChangeToElementsActor from "../Actors/ChangeToElementsActor";
 import PendingChangesUploader from "../Actors/PendingChangesUploader";
 import * as translators from "../../assets/translators.json"
+import {post} from "jquery";
         
 /**
  * The part of the state which keeps track of user-related stuff, e.g. the OSM-connection,
@@ -39,6 +40,8 @@ export default class UserRelatedState extends ElementsState {
 
     public readonly isTranslator : UIEventSource<boolean>;
     
+    public readonly installedUserThemes: UIEventSource<string[]>
+    
     constructor(layoutToUse: LayoutConfig, options?: { attemptLogin: true | boolean }) {
         super(layoutToUse);
 
@@ -116,6 +119,7 @@ export default class UserRelatedState extends ElementsState {
 
         this.InitializeLanguage();
         new SelectedElementTagsUpdater(this)
+        this.installedUserThemes = this.InitInstalledUserThemes();
 
     }
 
@@ -144,5 +148,51 @@ export default class UserRelatedState extends ElementsState {
             })
             .ping();
     }
+    
+    private InitInstalledUserThemes(): UIEventSource<string[]>{
+        const prefix = "mapcomplete-unofficial-theme-";
+        const postfix = "-combined-length"
+        return this.osmConnection.preferencesHandler.preferences.map(prefs =>
+            Object.keys(prefs)
+                .filter(k => k.startsWith(prefix) && k.endsWith(postfix))
+                .map(k => k.substring(prefix.length, k.length - postfix.length))
+        )
+    }
+    
+    public GetUnofficialTheme(id: string):  {
+        id: string
+        icon: string,
+        title: any,
+        shortDescription: any,
+        definition?: any,
+        isOfficial: boolean
+    } | undefined {
+        console.log("GETTING UNOFFICIAL THEME")
+        const pref = this.osmConnection.GetLongPreference("unofficial-theme-"+id)
+        const str = pref.data
+        
+        if (str === undefined || str === "undefined" || str === "") {
+            pref.setData(null)
+            return undefined
+        }
+        
+        try {
+            const value: {
+                id: string
+                icon: string,
+                title: any,
+                shortDescription: any,
+                definition?: any,
+                isOfficial: boolean
+            } = JSON.parse(str)
+            value.isOfficial = false
+            return value;
+        } catch (e) {
+            console.warn("Removing theme " + id + " as it could not be parsed from the preferences; the content is:", str)
+            pref.setData(null)
+            return undefined
+        }
+        
+    }
 
 }