Move User Defaults errors to ErrorConstants file

Shared/ErrorHandling/ErrorConstants.swift

@@ -81,6 +81,21 @@ extension AccountError: LocalizedError {
     }
 }
 
+// MARK: - User Defaults Errors
+
+enum UserDefaultsError: Error {
+    case couldNotMigrateStandardDefaults
+}
+
+extension UserDefaultsError: LocalizedError {
+    public var errorDescription: String? {
+        switch self {
+        case .couldNotMigrateStandardDefaults:
+            return NSLocalizedString("Could not migrate user defaults to group container", comment: "")
+        }
+    }
+}
+
 // MARK: - Local Store Errors
 
 enum LocalStoreError: Error {

Shared/Extensions/UserDefaults+Extensions.swift

@@ -17,17 +17,6 @@ enum WFDefaults {
 
 extension UserDefaults {
 
-    private enum DefaultsError: Error {
-        case couldNotMigrateStandardDefaults
-
-        var description: String {
-            switch self {
-            case .couldNotMigrateStandardDefaults:
-                return "Could not migrate user defaults to group container."
-            }
-        }
-    }
-
     private static let appGroupName: String = "group.com.abunchtell.writefreely"
     private static let didMigrateDefaultsToAppGroup: String = "didMigrateDefaultsToAppGroup"
     private static let didRemoveStandardDefaults: String = "didRemoveStandardDefaults"
@@ -61,7 +50,7 @@ extension UserDefaults {
             groupDefaults.set(true, forKey: UserDefaults.didMigrateDefaultsToAppGroup)
             return groupDefaults
         } else {
-            throw DefaultsError.couldNotMigrateStandardDefaults
+            throw UserDefaultsError.couldNotMigrateStandardDefaults
         }
     }