Add Wikidata search to wikidata value fields

src/GoMap.xcodeproj/project.pbxproj

@@ -274,6 +274,7 @@
 		C365A563263FC53F007DEC94 /* TurnRestrictHwyView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C365A562263FC53F007DEC94 /* TurnRestrictHwyView.swift */; };
 		C365A569263FCC9C007DEC94 /* TapAndDragGesture.swift in Sources */ = {isa = PBXBuildFile; fileRef = C365A568263FCC9C007DEC94 /* TapAndDragGesture.swift */; };
 		C381C30B263FE518003142BA /* PushPinView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C381C30A263FE518003142BA /* PushPinView.swift */; };
+		C3A1D0022F9A00010000A001 /* Wikidata.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3A1D0012F9A00010000A001 /* Wikidata.swift */; };
 		C3D0969C263CBC1100E3B129 /* POIFeaturePickerViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3D0969B263CBC1100E3B129 /* POIFeaturePickerViewController.swift */; };
 		C3D096AC263D48F700E3B129 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3D096AB263D48F700E3B129 /* AppDelegate.swift */; };
 		C3D096AE263D4BFB00E3B129 /* UploadViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3D096AD263D4BFB00E3B129 /* UploadViewController.swift */; };
@@ -661,6 +662,7 @@
 		C381C305263FD0CA003142BA /* VectorMath.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VectorMath.swift; sourceTree = "<group>"; };
 		C381C306263FD0E8003142BA /* UndoManager.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UndoManager.swift; sourceTree = "<group>"; };
 		C381C30A263FE518003142BA /* PushPinView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PushPinView.swift; sourceTree = "<group>"; };
+		C3A1D0012F9A00010000A001 /* Wikidata.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Wikidata.swift; sourceTree = "<group>"; };
 		C3D0969B263CBC1100E3B129 /* POIFeaturePickerViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = POIFeaturePickerViewController.swift; sourceTree = "<group>"; };
 		C3D0969F263CD4BD00E3B129 /* PersistentWebCache.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PersistentWebCache.swift; sourceTree = "<group>"; };
 		C3D096A2263CEBBC00E3B129 /* EditorMapLayer.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = EditorMapLayer.swift; sourceTree = "<group>"; };
@@ -1280,6 +1282,7 @@
 				02771D702BFC15C300FE9B79 /* UserFileList.swift */,
 				C381C305263FD0CA003142BA /* VectorMath.swift */,
 				C3D096FA263ED2EC00E3B129 /* VoiceAnnouncement.swift */,
+				C3A1D0012F9A00010000A001 /* Wikidata.swift */,
 				C341E1522639DECC0022E983 /* WikiPage.swift */,
 			);
 			name = Utility;
@@ -1761,6 +1764,7 @@
 				023320A22BE07B2000E3311A /* DataOverlayLayer.swift in Sources */,
 				02F2449A264F635800C42E41 /* PathUtil.swift in Sources */,
 				C341E1532639DECC0022E983 /* WikiPage.swift in Sources */,
+				C3A1D0022F9A00010000A001 /* Wikidata.swift in Sources */,
 				02B5669D294F9D7E00710632 /* MagnifyingGlass.swift in Sources */,
 				0286EAA62656FEAC007CFEE9 /* EditorMapLayer+Ocean.swift in Sources */,
 				023320A42BE1DB9900E3311A /* DPadView.swift in Sources */,

src/POI/PresetValueTextField.swift

@@ -121,6 +121,7 @@ class PresetValueTextField: AutocompleteTextField, PanoramaxDelegate {
 		textColor = nil
 
 		if key != "",
+		   !isWikidataKey,
 		   PresetsDatabase.shared.eligibleForAutocomplete(key)
 		{
 			var set: Set<String> = PresetsDatabase.shared.allTagValuesForKey(key)
@@ -194,6 +195,50 @@ class PresetValueTextField: AutocompleteTextField, PanoramaxDelegate {
 		text = value
 		updateAssociatedContent()
 		notifyValueChange(ended: true)
+
+		wikidataSearchTask?.cancel()
+		wikidataSearchText = ""
+		completionLabels = [:]
+	}
+
+	private var wikidataSearchTask: Task<Void, Never>?
+	private var wikidataSearchText = ""
+
+	private var isWikidataKey: Bool {
+		return OsmTags.isKey(key, variantOf: "wikidata")
+	}
+
+	override func updateAutocomplete(for text: String) {
+		guard isWikidataKey else {
+			super.updateAutocomplete(for: text)
+			return
+		}
+		let text = text.trimmingCharacters(in: .whitespacesAndNewlines)
+		if text == wikidataSearchText {
+			showCompletions(filteredCompletions)
+			return
+		}
+		wikidataSearchText = text
+		wikidataSearchTask?.cancel()
+		guard text != "", !Wikidata.isQID(text) else {
+			showCompletions([])
+			return
+		}
+		wikidataSearchTask = Task { @MainActor [weak self] in
+			try? await Task.sleep(nanoseconds: 300_000000)
+			guard !Task.isCancelled,
+			      let items = try? await Wikidata.search(text,
+			                                             language: PresetLanguages.preferredPresetLanguageCode()),
+			      !Task.isCancelled,
+			      let self,
+			      self.isEditing
+			else { return }
+			for item in items {
+				let subtitle = [item.id, item.description].compactMap { $0 }.joined(separator: " · ")
+				self.completionLabels[item.id] = (title: item.label, subtitle: subtitle)
+			}
+			self.showCompletions(items.map { $0.id })
+		}
 	}
 
 	// MARK: Accessory buttons

src/Shared/CustomViews/AutocompleteTextField.swift

@@ -64,6 +64,13 @@ class AutocompleteTextField: UITextField, UITableViewDataSource, UITableViewDele
 		}
 	}
 
+	var completionLabels: [String: (title: String, subtitle: String?)] = [:]
+
+	func showCompletions(_ values: [String]) {
+		filteredCompletions = values
+		updateCompletionTableView()
+	}
+
 	func updateAutocomplete(for text: String) {
 		let text = text.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
 		// filter completion list by current text
@@ -241,15 +248,24 @@ class AutocompleteTextField: UITextField, UITableViewDataSource, UITableViewDele
 	}
 
 	func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
-		let cellIdentifier = "Cell"
+		// shouldn't need this check but we got an out-of-range crash report
+		let value = indexPath.row < filteredCompletions.count ? filteredCompletions[indexPath.row] : ""
+		let label = completionLabels[value]
+
+		let cellIdentifier = label != nil ? "SubtitleCell" : "Cell"
 		let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier)
-			?? UITableViewCell(style: .default, reuseIdentifier: cellIdentifier)
+			?? UITableViewCell(style: label != nil ? .subtitle : .default, reuseIdentifier: cellIdentifier)
 		cell.textLabel?.font = UIFont.preferredFont(forTextStyle: .body)
-		// shouldn't need this check but we got an out-of-range crash report
-		if indexPath.row < filteredCompletions.count {
-			cell.textLabel?.text = filteredCompletions[indexPath.row]
+		if let label {
+			cell.textLabel?.text = label.title
+			cell.detailTextLabel?.text = label.subtitle
+			if #available(iOS 13.0, *) {
+				cell.detailTextLabel?.textColor = .secondaryLabel
+			} else {
+				cell.detailTextLabel?.textColor = .gray
+			}
 		} else {
-			cell.textLabel?.text = ""
+			cell.textLabel?.text = value
 		}
 		return cell
 	}

src/Shared/Utility/Wikidata.swift

@@ -0,0 +1,61 @@
+//
+//  Wikidata.swift
+//  Go Map!!
+//
+//  Copyright © 2026 Bryce Cogswell. All rights reserved.
+//
+
+import Foundation
+
+struct WikidataItem {
+	let id: String
+	let label: String
+	let description: String?
+}
+
+enum Wikidata {
+	private static let apiURL = URL(string: "https://www.wikidata.org/w/api.php")!
+
+	static func isQID(_ value: String) -> Bool {
+		return value.range(of: "^Q[1-9][0-9]*$", options: .regularExpression) != nil
+	}
+
+	static func search(_ text: String, language: String) async throws -> [WikidataItem] {
+		let language = language.lowercased()
+		let results = try await search(text, wikidataLanguage: language)
+		if results == nil,
+		   let base = language.split(separator: "-").first,
+		   base != language
+		{
+			return try await search(text, wikidataLanguage: String(base)) ?? []
+		}
+		return results ?? []
+	}
+
+	private static func search(_ text: String, wikidataLanguage language: String) async throws -> [WikidataItem]? {
+		let url = apiURL.appendingQueryItems([
+			"action": "wbsearchentities",
+			"format": "json",
+			"formatversion": "2",
+			"type": "item",
+			"limit": "10",
+			"search": text,
+			"language": language,
+			"uselang": language
+		])
+		let data = try await URLSession.shared.data(with: url)
+		guard let json = try JSONSerialization.jsonObject(with: data) as? [String: Any] else { return [] }
+		if let error = json["error"] as? [String: Any],
+		   error["code"] as? String == "badvalue"
+		{
+			return nil
+		}
+		guard let results = json["search"] as? [[String: Any]] else { return [] }
+		return results.compactMap { result in
+			guard let id = result["id"] as? String else { return nil }
+			return WikidataItem(id: id,
+			                    label: result["label"] as? String ?? id,
+			                    description: result["description"] as? String)
+		}
+	}
+}