Detect an element that is deleted upstream; show 'this element is deleted in infopanel'

Logic/Actors/SelectedElementTagsUpdater.ts

@@ -1,11 +1,11 @@
 /**
  * This actor will download the latest version of the selected element from OSM and update the tags if necessary.
  */
-import { UIEventSource } from "../UIEventSource"
-import { ElementStorage } from "../ElementStorage"
-import { Changes } from "../Osm/Changes"
-import { OsmObject } from "../Osm/OsmObject"
-import { OsmConnection } from "../Osm/OsmConnection"
+import {UIEventSource} from "../UIEventSource"
+import {ElementStorage} from "../ElementStorage"
+import {Changes} from "../Osm/Changes"
+import {OsmObject} from "../Osm/OsmObject"
+import {OsmConnection} from "../Osm/OsmConnection"
 import LayoutConfig from "../../Models/ThemeConfig/LayoutConfig"
 import SimpleMetaTagger from "../SimpleMetaTagger"
 
@@ -41,7 +41,7 @@ export default class SelectedElementTagsUpdater {
         osmConnection: OsmConnection
         layoutToUse: LayoutConfig
     }) {
-        state.selectedElement.addCallbackAndRunD((s) => {
+        state.selectedElement.addCallbackAndRunD(async (s) => {
             let id = s.properties?.id
 
             const backendUrl = state.osmConnection._oauth_config.url
@@ -58,9 +58,24 @@ export default class SelectedElementTagsUpdater {
                 // This is a new object
                 return
             }
-            OsmObject.DownloadPropertiesOf(id).then((latestTags) => {
+            try {
+
+                const latestTags = await OsmObject.DownloadPropertiesOf(id)
+                if (latestTags === "deleted") {
+                    console.warn("The current selected element has been deleted upstream!")
+                    const currentTagsSource = state.allElements.getEventSourceById(id)
+                    if(currentTagsSource.data["_deleted"] === "yes"){
+                        return
+                    }
+                    currentTagsSource.data["_deleted"] = "yes"
+                    currentTagsSource.ping()
+                    return;
+                }
                 SelectedElementTagsUpdater.applyUpdate(state, latestTags, id)
-            })
+                console.log("Updated", id)
+            } catch (e) {
+                console.warn("Could not update", id, " due to", e)
+            }
         })
     }
 

Logic/Osm/OsmObject.ts

@@ -61,7 +61,7 @@ export abstract class OsmObject {
         return src
     }
 
-    static async DownloadPropertiesOf(id: string): Promise<any> {
+    static async DownloadPropertiesOf(id: string): Promise<OsmTags | "deleted"> {
         const splitted = id.split("/")
         const idN = Number(splitted[1])
         if (idN < 0) {
@@ -69,8 +69,12 @@ export abstract class OsmObject {
         }
 
         const url = `${OsmObject.backendURL}api/0.6/${id}`
-        const rawData = await Utils.downloadJsonCached(url, 1000)
-        return rawData.elements[0].tags
+        const rawData = await Utils.downloadJsonCachedAdvanced(url, 1000)
+        console.log(rawData)
+        if(rawData["error"] !== undefined && rawData["statuscode"] === 410){
+            return "deleted"
+        }
+        return rawData["contents"].elements[0].tags
     }
 
     static async DownloadObjectAsync(

UI/Popup/FeatureInfoBox.ts

@@ -77,10 +77,21 @@ export default class FeatureInfoBox extends ScrollableFullScreen {
     }
 
     public static GenerateContent(
+        tags: UIEventSource<any>,
+        layerConfig: LayerConfig,
+        state: FeaturePipelineState): BaseUIElement{
+        return new Toggle(
+            "This object is deleted",
+            FeatureInfoBox.GenerateMainContent(tags, layerConfig, state),
+            tags.map(t => t["_deleted"] == "yes")
+        )
+    }
+    private static GenerateMainContent(
         tags: UIEventSource<any>,
         layerConfig: LayerConfig,
         state: FeaturePipelineState
     ): BaseUIElement {
+
         let questionBoxes: Map<string, QuestionBox> = new Map<string, QuestionBox>()
         const t = Translations.t.general
         const allGroupNames = Utils.Dedup(layerConfig.tagRenderings.map((tr) => tr.group))