Themes: fix validation errors due to #1779

assets/themes/atm/atm.json

@@ -38,7 +38,6 @@
       "builtin": "bank",
       "override": {
         "id": "banks_with_atm",
-        "name": null,
         "minzoom": 14,
         "source": {
           "osmTags": {
@@ -56,6 +55,7 @@
       "builtin": "bank",
       "override": {
         "minzoom": 18,
+        "name": null,
         "filter": {
           "sameAs": "bank_with_atm"
         }
@@ -167,6 +167,7 @@
       "builtin": "postoffices",
       "override": {
         "minzoom": 18,
+        "name": null,
         "filter": {
           "sameAs": "post_offices_with_atm"
         }

assets/themes/climbing/climbing.json

@@ -393,6 +393,7 @@
           ]
         },
         "minzoom": 16,
+        "name": null,
         "+tagRenderings": [
           {
             "id": "repairs_climbing_shoes",

assets/themes/healthcare/healthcare.json

@@ -110,9 +110,9 @@
     },
     {
       "builtin": "shops",
-      "=presets": [],
-      "=name": null,
       "override": {
+        "=presets": [],
+        "name": null,
         "minzoom": 18
       }
     }

src/Models/ThemeConfig/Conversion/PrepareTheme.ts

@@ -557,24 +557,33 @@ class WarnForUnsubstitutedLayersInTheme extends DesugaringStep<LayoutConfigJson>
 }
 
 class PostvalidateTheme extends DesugaringStep<LayoutConfigJson> {
-    constructor() {
+    private readonly _state: DesugaringContext
+    constructor(state: DesugaringContext) {
         super("Various validation steps when everything is done", [], "PostvalidateTheme")
+        this._state = state
     }
 
     convert(json: LayoutConfigJson, context: ConversionContext): LayoutConfigJson {
         for (const l of json.layers) {
             const layer = <LayerConfigJson> l
             const basedOn = <string> layer["_basedOn"]
+            const basedOnDef = this._state.sharedLayers.get(basedOn)
             if(!basedOn){
                 continue
             }
             if(layer["name"] === null){
                 continue
             }
-            const sameBasedOn = <LayerConfigJson[]> json.layers.filter(l => l["_basedOn"] === layer["_basedOn"])
+            const sameBasedOn = <LayerConfigJson[]> json.layers.filter(l => l["_basedOn"] === layer["_basedOn"] && l["id"] !== layer.id)
             const minZoomAll = Math.min(...sameBasedOn.map(sbo => sbo.minzoom))
+
+            const sameNameDetected = sameBasedOn.some( same =>  JSON.stringify(layer["name"]) === JSON.stringify(same["name"]))
+            if(!sameNameDetected){
+                // The name is unique, so it'll won't be confusing
+                continue
+            }
             if(minZoomAll < layer.minzoom){
-                context.err("There are multiple layers based on "+basedOn+". The layer with id "+layer.id+" has a minzoom of "+layer.minzoom+", but has no name set. Another similar layer has a lower minzoom. As such, the layer selection might show 'zoom in to see features' even though some of the features are already visible. Set `\"name\": null` for this layer and eventually remove the 'name':null for the other layer.")
+                context.err("There are multiple layers based on "+basedOn+". The layer with id "+layer.id+" has a minzoom of "+layer.minzoom+", and has a name set. Another similar layer has a lower minzoom. As such, the layer selection might show 'zoom in to see features' even though some of the features are already visible. Set `\"name\": null` for this layer and eventually remove the 'name':null for the other layer.")
             }
         }
 
@@ -610,7 +619,7 @@ export class PrepareTheme extends Fuse<LayoutConfigJson> {
                 : new AddDefaultLayers(state),
             new AddDependencyLayersToTheme(state),
             new AddImportLayers(),
-            new PostvalidateTheme()
+            new PostvalidateTheme(state)
         )
         this.state = state
     }