From e27ad7e2ef4b75ac0a420dbbe2f47aa97639a8a1 Mon Sep 17 00:00:00 2001
From: jahorton <jahorton@sil.org>
Date: Thu, 13 Feb 2020 10:54:01 +0700
Subject: [PATCH] fix(ios): initial-install check within Migrations

---
 ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift    | 7 ++++++-
 ios/engine/KMEI/KeymanEngine/Classes/Model/Version.swift | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift b/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift
index b7ba94c99c..6ae03a82e1 100644
--- a/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift
+++ b/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift
@@ -116,6 +116,11 @@ public enum Migrations {
 
     // Detect possible version matches.
     let userResources = Storage.active.userDefaults.userResources ?? []
+
+    // If there are no pre-existing resources and we need to detect a version, this is a fresh install.
+    if userResources.count == 0 {
+      return [Version.freshInstall]
+    }
     let possibleMatches: [Version] = resourceHistory.compactMap { set in
       if set.version < Version("12.0")! {
         // Are all of the version's default resources present?
@@ -183,7 +188,7 @@ public enum Migrations {
       }
     }
 
-    if lastVersion != nil {
+    if lastVersion != nil && lastVersion != Version.freshInstall {
       // Time to deinstall the old version's resources.
       // First, find the most recent version with a listed history.
       let possibleHistories: [VersionResourceSet] = resourceHistory.compactMap { set in
diff --git a/ios/engine/KMEI/KeymanEngine/Classes/Model/Version.swift b/ios/engine/KMEI/KeymanEngine/Classes/Model/Version.swift
index 8936def380..b457dbd1bb 100644
--- a/ios/engine/KMEI/KeymanEngine/Classes/Model/Version.swift
+++ b/ios/engine/KMEI/KeymanEngine/Classes/Model/Version.swift
@@ -14,6 +14,7 @@ public struct Version: Comparable {
   public static let current = Version("13.0.65")!
 
   // The Engine first started tracking the 'last loaded version' in 12.0.
+  public static let freshInstall = Version("0.0")!
   public static let firstTracked = Version("12.0")!
 
   // The Keyman App's file browser was first added in 13.0 alpha;