Merge pull request #137 from patchkit-net/feature/v3.x.x.x/1361-cache-app-changelog

Cache app changelog (#1361)

Author: witcher112

Assets/PatchKit Patcher/Scripts/UI/Changelog/ChangelogList.cs

@@ -1,6 +1,9 @@
-using System.Collections;
+using System;
+using System.Collections;
 using System.Linq;
+using Newtonsoft.Json;
 using PatchKit.Api.Models.Main;
+using PatchKit.Unity.Patcher.AppData.Local;
 using PatchKit.Unity.Patcher.Cancellation;
 using PatchKit.Unity.UI;
 using PatchKit.Unity.Utilities;
@@ -20,15 +23,73 @@ protected override IEnumerator LoadCoroutine()
                 yield return null;
             }
 
+            var appSecret = Patcher.Instance.Data.Value.AppSecret;
+
+            LoadChangelogFromCache(appSecret);
+
             yield return
-                Threading.StartThreadCoroutine(() => MainApiConnection.GetAppVersionList(Patcher.Instance.Data.Value.AppSecret, null, CancellationToken.Empty),
-                    response =>
-                    {
-                        foreach (var version in response.OrderByDescending(version => version.Id))
-                        {
-                            CreateVersionChangelog(version);
-                        }
-                    });
+                Threading.StartThreadCoroutine(() =>
+                        MainApiConnection.GetAppVersionList(
+                            Patcher.Instance.Data.Value.AppSecret,
+                            null,
+                            CancellationToken.Empty),
+                    versions => CreateAndCacheChangelog(appSecret, versions));
+        }
+
+        private void LoadChangelogFromCache(string appSecret)
+        {
+            try
+            {
+                var cacheValue = new UnityCache(appSecret).GetValue("app-changelog", null);
+
+                if (cacheValue == null)
+                {
+                    return;
+                }
+
+                var versions = JsonConvert.DeserializeObject<AppVersion[]>(cacheValue);
+
+                CreateChangelog(versions);
+            }
+            catch (Exception)
+            {
+                // ignore
+            }
+        }
+
+        private void CreateAndCacheChangelog(string appSecret, AppVersion[] versions)
+        {
+            try
+            {
+                var cacheValue = JsonConvert.SerializeObject(versions);
+
+                new UnityCache(appSecret).SetValue("app-changelog", cacheValue);
+            }
+            catch (Exception e)
+            {
+                UnityEngine.Debug.Log(e.ToString());
+            }
+
+            CreateChangelog(versions);
+        }
+
+        private void DestroyOldChangelog()
+        {
+            while(transform.childCount > 0)
+            {
+                DestroyImmediate(transform.GetChild(0).gameObject);
+            }
+
+        }
+
+        private void CreateChangelog(AppVersion[] versions)
+        {
+            DestroyOldChangelog();
+
+            foreach (AppVersion version in versions.OrderByDescending(version => version.Id))
+            {
+                CreateVersionChangelog(version);
+            }
         }
 
         private void CreateVersionChangelog(AppVersion version)

CHANGELOG.md

@@ -5,7 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [3.x.x.x]
-### Added 
+### Added
+- Caching application changelog so it can be displayed in offline mode (#1361)
 - Skip unchanged files while patching (#994)
 
 ### Changed