Refactor PeersNearbyUI [skip ci]

submodules/Geocoding/Sources/Geocoding.swift

@@ -0,0 +1,60 @@
+import Foundation
+import CoreLocation
+import SwiftSignalKit
+
+public func geocodeLocation(dictionary: [String: String]) -> Signal<(Double, Double)?, NoError> {
+    return Signal { subscriber in
+        let geocoder = CLGeocoder()
+        geocoder.geocodeAddressDictionary(dictionary, completionHandler: { placemarks, _ in
+            if let location = placemarks?.first?.location {
+                subscriber.putNext((location.coordinate.latitude, location.coordinate.longitude))
+            } else {
+                subscriber.putNext(nil)
+            }
+            subscriber.putCompletion()
+        })
+        return ActionDisposable {
+            geocoder.cancelGeocode()
+        }
+    }
+}
+
+public struct ReverseGeocodedPlacemark {
+    public let street: String?
+    public let city: String?
+    public let country: String?
+    
+    public var fullAddress: String {
+        var components: [String] = []
+        if let street = self.street {
+            components.append(street)
+        }
+        if let city = self.city {
+            components.append(city)
+        }
+        if let country = self.country {
+            components.append(country)
+        }
+        
+        return components.joined(separator: ", ")
+    }
+}
+
+public func reverseGeocodeLocation(latitude: Double, longitude: Double) -> Signal<ReverseGeocodedPlacemark?, NoError> {
+    return Signal { subscriber in
+        let geocoder = CLGeocoder()
+        geocoder.reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: { placemarks, _ in
+            if let placemarks = placemarks, let placemark = placemarks.first {
+                let result = ReverseGeocodedPlacemark(street: placemark.thoroughfare, city: placemark.locality, country: placemark.country)
+                subscriber.putNext(result)
+                subscriber.putCompletion()
+            } else {
+                subscriber.putNext(nil)
+                subscriber.putCompletion()
+            }
+        })
+        return ActionDisposable {
+            geocoder.cancelGeocode()
+        }
+    }
+}