Switch location notes and UI helpers to building-level geohash (precision 8): add GeohashChannelLevel.building, map length 8, use building for notes selection and counter, add building name mapping

bitchat/Protocols/LocationChannel.swift

@@ -2,6 +2,7 @@ import Foundation
 
 /// Levels of location channels mapped to geohash precisions.
 enum GeohashChannelLevel: CaseIterable, Codable, Equatable {
+    case building
     case block
     case neighborhood
     case city
@@ -11,6 +12,7 @@ enum GeohashChannelLevel: CaseIterable, Codable, Equatable {
     /// Geohash length used for this level.
     var precision: Int {
         switch self {
+        case .building: return 8
         case .block: return 7
         case .neighborhood: return 6
         case .city: return 5
@@ -21,6 +23,7 @@ enum GeohashChannelLevel: CaseIterable, Codable, Equatable {
 
     var displayName: String {
         switch self {
+        case .building: return "Building"
         case .block: return "Block"
         case .neighborhood: return "Neighborhood"
         case .city: return "City"
@@ -35,6 +38,7 @@ extension GeohashChannelLevel {
         let container = try decoder.singleValueContainer()
         if let raw = try? container.decode(String.self) {
             switch raw {
+            case "building": self = .building
             case "block": self = .block
             case "neighborhood": self = .neighborhood
             case "city": self = .city
@@ -46,6 +50,7 @@ extension GeohashChannelLevel {
             }
         } else if let precision = try? container.decode(Int.self) {
             switch precision {
+            case 8: self = .building
             case 7: self = .block
             case 6: self = .neighborhood
             case 5: self = .city
@@ -61,6 +66,7 @@ extension GeohashChannelLevel {
     func encode(to encoder: Encoder) throws {
         var container = encoder.singleValueContainer()
         switch self {
+        case .building: try container.encode("building")
         case .block: try container.encode("block")
         case .neighborhood: try container.encode("neighborhood")
         case .city: try container.encode("city")

bitchat/Services/LocationChannelManager.swift

@@ -285,12 +285,18 @@ final class LocationChannelManager: NSObject, CLLocationManagerDelegate, Observa
         } else if let locality = pm.locality, !locality.isEmpty {
             dict[.neighborhood] = locality
         }
-        // Block: reuse neighborhood/locality granularity without exposing street level
+        // Block: reuse neighborhood/locality granularity
         if let subLocality = pm.subLocality, !subLocality.isEmpty {
             dict[.block] = subLocality
         } else if let locality = pm.locality, !locality.isEmpty {
             dict[.block] = locality
         }
+        // Building: prefer place name/street address without numbers where possible
+        if let name = pm.name, !name.isEmpty {
+            dict[.building] = name
+        } else if let thoroughfare = pm.thoroughfare, !thoroughfare.isEmpty {
+            dict[.building] = thoroughfare
+        }
         return dict
     }
 }

bitchat/Views/ContentView.swift

@@ -474,7 +474,8 @@ struct ContentView: View {
                     case 5: return .city
                     case 6: return .neighborhood
                     case 7: return .block
-                    default: return .block
+                    case 8: return .building
+                    default: return .building
                     }
                 }
                 let level = levelForLength(gh.count)
@@ -1180,7 +1181,7 @@ struct ContentView: View {
                         LocationChannelManager.shared.enableLocationChannels()
                         LocationChannelManager.shared.refreshChannels()
                         // If we already have a block geohash, pass it; otherwise wait in the sheet.
-                        notesGeohash = LocationChannelManager.shared.availableChannels.first(where: { $0.level == .block })?.geohash
+                        notesGeohash = LocationChannelManager.shared.availableChannels.first(where: { $0.level == .building })?.geohash
                         showLocationNotes = true
                     }) {
                         HStack(spacing: 4) {
@@ -1231,7 +1232,7 @@ struct ContentView: View {
         }
         .sheet(isPresented: $showLocationNotes) {
             Group {
-                if let gh = notesGeohash ?? LocationChannelManager.shared.availableChannels.first(where: { $0.level == .block })?.geohash {
+                if let gh = notesGeohash ?? LocationChannelManager.shared.availableChannels.first(where: { $0.level == .building })?.geohash {
                     LocationNotesView(geohash: gh)
                         .environmentObject(viewModel)
                 } else {
@@ -1265,8 +1266,8 @@ struct ContentView: View {
                     .background(backgroundColor)
                     .foregroundColor(textColor)
                     .onChange(of: locationManager.availableChannels) { channels in
-                        if notesGeohash == nil, let block = channels.first(where: { $0.level == .block }) {
-                            notesGeohash = block.geohash
+                        if notesGeohash == nil, let building = channels.first(where: { $0.level == .building }) {
+                            notesGeohash = building.geohash
                         }
                     }
                 }
@@ -1478,8 +1479,8 @@ extension ContentView {
     private func updateNotesCounterSubscription() {
         switch locationManager.selectedChannel {
         case .mesh:
-            if let block = LocationChannelManager.shared.availableChannels.first(where: { $0.level == .block })?.geohash {
-                LocationNotesCounter.shared.subscribe(geohash: block)
+            if let building = LocationChannelManager.shared.availableChannels.first(where: { $0.level == .building })?.geohash {
+                LocationNotesCounter.shared.subscribe(geohash: building)
             } else {
                 LocationNotesCounter.shared.cancel()
             }

bitchat/Views/LocationChannelsSheet.swift

@@ -381,7 +381,8 @@ struct LocationChannelsSheet: View {
         case 5: return .city
         case 6: return .neighborhood
         case 7: return .block
-        default: return .block
+        case 8: return .building
+        default: return .building
         }
     }
 }
@@ -462,6 +463,8 @@ extension LocationChannelsSheet {
         switch level {
         case .region:
             return ""
+        case .building:
+            return ""
         default:
             return "~"
         }

bitchat/Views/LocationNotesSheet.swift

@@ -13,7 +13,7 @@ struct LocationNotesSheet: View {
 
     var body: some View {
         Group {
-            if let gh = notesGeohash ?? locationManager.availableChannels.first(where: { $0.level == .block })?.geohash {
+            if let gh = notesGeohash ?? locationManager.availableChannels.first(where: { $0.level == .building })?.geohash {
                 // Found block geohash: show notes view
                 LocationNotesView(geohash: gh)
                     .environmentObject(viewModel)
@@ -55,12 +55,11 @@ struct LocationNotesSheet: View {
                     LocationChannelManager.shared.refreshChannels()
                 }
                 .onChange(of: locationManager.availableChannels) { channels in
-                    if notesGeohash == nil, let block = channels.first(where: { $0.level == .block }) {
-                        notesGeohash = block.geohash
+                    if notesGeohash == nil, let building = channels.first(where: { $0.level == .building }) {
+                        notesGeohash = building.geohash
                     }
                 }
             }
         }
     }
 }
-