From c7b3c111e279058d81a1ebed242851165382e668 Mon Sep 17 00:00:00 2001
From: Kayd-06 <kunaldadlani25@gmail.com>
Date: Sun, 22 Feb 2026 14:11:19 +0530
Subject: [PATCH] Fix region-specific presets in Recently Used list (#11405)

---
 modules/presets/index.js   | 11 +++++-
 test/spec/presets/index.js | 78 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 1 deletion(-)

diff --git a/modules/presets/index.js b/modules/presets/index.js
index fb7e2faf1d8..bf127752bbd 100644
--- a/modules/presets/index.js
+++ b/modules/presets/index.js
@@ -1,4 +1,5 @@
 import { dispatch as d3_dispatch } from 'd3-dispatch';
+import { isEqual } from 'lodash-es';
 
 import { prefs } from '../core/preferences';
 import { fileFetcher } from '../core/file_fetcher';
@@ -428,7 +429,15 @@ export function presetIndex() {
 
     if (Array.isArray(loc)) {
       const validHere = locationManager.locationSetsAt(loc);
-      result.collection = result.collection.filter(a => !a.locationSetID || validHere[a.locationSetID]);
+      result.collection = result.collection.map(a => {
+        if (a.locationSetID && !validHere[a.locationSetID]) {
+          const equivalent = _this.matchTags(a.tags, geometry, loc);
+          if (equivalent && !equivalent.isFallback() && isEqual(a.tags, equivalent.tags)) {
+            return equivalent;
+          }
+        }
+        return a;
+      }).filter(a => !a.locationSetID || validHere[a.locationSetID]);
     }
 
     return result;
diff --git a/test/spec/presets/index.js b/test/spec/presets/index.js
index 0214c2fa238..31d16319c98 100644
--- a/test/spec/presets/index.js
+++ b/test/spec/presets/index.js
@@ -425,4 +425,82 @@ describe('iD.presetIndex', function () {
         });
     });
 
+    describe('Issue #11405: Region-specific Presets in Recently Used List', function () {
+        it('replaces an invalid regional preset in defaults with a valid equivalent', async () => {
+            // Define a base preset and a regional variant
+            var testPresets = {
+                'highway/motorway_link': {
+                    name: 'Motorway Link',
+                    tags: { highway: 'motorway_link' },
+                    geometry: ['line']
+                },
+                'highway/motorway_link-US': {
+                    name: 'Motorway Link (US)',
+                    tags: { highway: 'motorway_link' },
+                    geometry: ['line'],
+                    locationSet: { include: ['us'] }
+                }
+            };
+
+            iD.fileFetcher.cache().preset_presets = testPresets;
+            var presets = iD.presetIndex();
+            await presets.ensureLoaded();
+
+            // Add the US variant to "Recent" presets
+            var usVariant = presets.item('highway/motorway_link-US');
+            presets.setMostRecent(usVariant);
+
+            // Location in US (e.g., New York)
+            var locUS = [-74.006, 40.7128];
+            // Location outside US (e.g., London)
+            var locUK = [-0.1278, 51.5074];
+
+            // 1. Verify that in US, the US variant is returned
+            var defaultsUS = presets.defaults('line', 10, true, locUS);
+            expect(defaultsUS.collection.some(p => p.id === 'highway/motorway_link-US')).to.be.true;
+
+            // 2. Verify that outside US, the US variant is REPLACED by the base variant
+            var defaultsUK = presets.defaults('line', 10, true, locUK);
+
+            expect(defaultsUK.collection.some(p => p.id === 'highway/motorway_link-US')).to.be.false;
+            expect(defaultsUK.collection.some(p => p.id === 'highway/motorway_link')).to.be.true;
+        });
+
+        it('removes an invalid regional preset in defaults if no equivalent exists', async () => {
+            // Define a regional preset with special tags that has NO base equivalent
+            var testPresets = {
+                'highway/special_us_road': {
+                    name: 'Special US Road',
+                    tags: { highway: 'residential', residential: 'special_us' },
+                    geometry: ['line'],
+                    locationSet: { include: ['us'] }
+                },
+                'residential': {
+                    name: 'Residential',
+                    tags: { highway: 'residential' },
+                    geometry: ['line']
+                }
+            };
+
+            iD.fileFetcher.cache().preset_presets = testPresets;
+            var presets = iD.presetIndex();
+            await presets.ensureLoaded();
+
+            // Add the US variant to "Recent" presets
+            var usVariant = presets.item('highway/special_us_road');
+            presets.setMostRecent(usVariant);
+
+            // Location outside US
+            var locUK = [-0.1278, 51.5074];
+
+            var defaultsUK = presets.defaults('line', 10, true, locUK);
+
+            // 1. The US variant should be removed because it's invalid in UK
+            expect(defaultsUK.collection.some(p => p.id === 'highway/special_us_road')).to.be.false;
+
+            // 2. No replacement should happen because matchTags({highway: 'residential', residential: 'special_us'})
+            // will match 'residential', but 'residential' doesn't have the same specific tags.
+            expect(defaultsUK.collection.some(p => p.id === 'residential')).to.be.false;
+        });
+    });
 });