Implements #5 Cache databases for disconnected (offline) usage

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ### New
 
+- \#5 Cache databases for disconnected (offline) usage
+
 ### Fixed
 
 - \#58 Amazon S3: Cannot save/write database file to root of bucket

KeeAnywhere/Configuration/PluginConfiguration.cs

@@ -1,5 +1,7 @@
 using System;
+using System.IO;
 using System.Runtime.Serialization;
+using KeePass.App.Configuration;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Converters;
 
@@ -11,6 +13,14 @@ public class PluginConfiguration
         [DataMember]
         public bool IsOfflineCacheEnabled { get; set; }
 
+        public string OfflineCacheFolder
+        {
+            get
+            {
+                return Path.Combine(AppConfigSerializer.LocalAppDataDirectory, "KeeAnywhereOfflineCache");
+            }
+        }
+
         [DataMember]
         [JsonConverter(typeof(StringEnumConverter))]
         public AccountStorageLocation AccountStorageLocation { get; set; }

KeeAnywhere/Forms/SettingsForm.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Text.RegularExpressions;
@@ -19,8 +20,6 @@ public partial class SettingsForm : Form
         public SettingsForm()
         {
             InitializeComponent();
-
-            m_tcSettings.TabPages.Remove(m_tabGeneral);
         }
 
         public void InitEx(ConfigurationService configService, UIService uiService)
@@ -40,7 +39,7 @@ private void OnBtnCancelClick(object sender, EventArgs e)
         private void OnBtnOkClick(object sender, EventArgs e)
         {
             // General Settings
-            m_configService.PluginConfiguration.IsOfflineCacheEnabled = m_cbOfflineCache.Checked;
+            m_configService.PluginConfiguration.IsOfflineCacheEnabled = m_chkOfflineCache.Checked;
 
             if (m_rbStorageLocation_LocalUserSecureStore.Checked)
                 m_configService.PluginConfiguration.AccountStorageLocation = AccountStorageLocation.LocalUserSecureStore;
@@ -170,7 +169,8 @@ private void UpdateAccountList()
 
         private void InitGeneralTab()
         {
-            m_cbOfflineCache.Checked = m_configService.PluginConfiguration.IsOfflineCacheEnabled;
+            m_chkOfflineCache.Checked = m_configService.PluginConfiguration.IsOfflineCacheEnabled;
+            UpdateCacheButtonState();
         }
 
         private async void OnAccountAdd(object sender, EventArgs e)
@@ -307,6 +307,51 @@ private async void OnAccountCheck(object sender, EventArgs e)
             this.UseWaitCursor = false;
         }
 
+        private void OnClearCache(object sender, EventArgs e)
+        {
+            var isOk = MessageService.AskYesNo("Do you really want to clear Offline Cache Folder?\r\nMaybe your unsynced changes get lost!", "Clear Offline Cache", false);
+
+            if (isOk) 
+                ClearCache();
+        }
+
+        private void ClearCache()
+        {
+            var path = m_configService.PluginConfiguration.OfflineCacheFolder;
+
+            if (!Directory.Exists(path))
+                return;
+
+            Directory.Delete(path, true);
+        }
+
+        private void OnOpenCacheFolder(object sender, EventArgs e)
+        {
+            var path = m_configService.PluginConfiguration.OfflineCacheFolder;
+            if (Directory.Exists(path))
+                Process.Start(path);
+            else
+                MessageService.ShowInfo("Offline Cache Folder does not exist:", path);
+        }
+
+        private void OnOfflineCacheChanged(object sender, EventArgs e)
+        {
+            UpdateCacheButtonState();
+
+            var path = m_configService.PluginConfiguration.OfflineCacheFolder;
+            if (m_chkOfflineCache.Checked || !Directory.Exists(path)) return;
 
+            var isOk = MessageService.AskYesNo("You are disabeling Offline Cache.\r\nDo you want to clear Offline Cache Folder?\r\nMaybe your unsynced changes get lost!", "Clear Offline Cache", false);
+
+            if (isOk)
+                ClearCache();
+        }
+
+        private void UpdateCacheButtonState()
+        {
+            var isEnabled = m_chkOfflineCache.Checked;
+            m_btnOpenCacheFolder.Enabled = isEnabled;
+            m_btnClearCache.Enabled = isEnabled;
+        }
     }
 }

KeeAnywhere/KeeAnywhere.csproj

@@ -239,6 +239,8 @@
       <DependentUpon>OAuth2Form.cs</DependentUpon>
     </Compile>
     <Compile Include="OAuth2\OAuth2Token.cs" />
+    <Compile Include="Offline\CacheManagerService.cs" />
+    <Compile Include="Offline\ICacheSupervisor.cs" />
     <Compile Include="PluginResources.Designer.cs">
       <AutoGen>True</AutoGen>
       <DesignTime>True</DesignTime>
@@ -299,7 +301,7 @@
     <Compile Include="UIService.cs" />
     <Compile Include="WebRequest\KeeAnywhereWebResponse.cs" />
     <Compile Include="WebRequest\KeeAnywhereWebRequest.cs" />
-    <Compile Include="WebRequest\KeeAnywhereWebRequestCreator.cs" />
+    <Compile Include="Offline\CacheProvider.cs" />
     <Compile Include="WebRequest\RequestStream.cs" />
     <Compile Include="WebRequest\WrapperStream.cs" />
   </ItemGroup>
@@ -362,6 +364,7 @@
   <ItemGroup>
     <Analyzer Include="..\packages\AWSSDK.S3.3.1.9.0\analyzers\dotnet\cs\AWSSDK.S3.CodeAnalysis.dll" />
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PostBuildEvent>

KeeAnywhere/KeeAnywhereExt.cs

@@ -5,6 +5,7 @@
 using System.Windows.Forms;
 using KeeAnywhere.Configuration;
 using KeeAnywhere.Forms;
+using KeeAnywhere.Offline;
 using KeeAnywhere.StorageProviders;
 using KeePass.Plugins;
 using KeePass.UI;
@@ -29,6 +30,7 @@ public class KeeAnywhereExt : Plugin
 
         private ToolStripMenuItem _tsShowSettings;
         private UIService _uiService;
+        private CacheManagerService _cacheManagerService;
 
 
         /// <summary>
@@ -50,7 +52,7 @@ public override bool Initialize(IPluginHost pluginHost)
             if (NativeLib.IsUnix()) return false;
 
             _host = pluginHost;
-
+            //_host.MainWindow.FileOpened;
             // Some binding redirection fixes for Google Drive API
             FixGoogleApiDependencyLoading();
 
@@ -61,9 +63,13 @@ public override bool Initialize(IPluginHost pluginHost)
             _configService = new ConfigurationService(pluginHost);
             _configService.Load();
 
+            // Initialize CacheManager
+            _cacheManagerService = new CacheManagerService(_configService, _host);
+            _cacheManagerService.RegisterEvents();
+
             // Initialize storage providers
-            _storageService = new StorageService(_configService);
-            _storageService.Register();
+            _storageService = new StorageService(_configService, _cacheManagerService);
+            _storageService.RegisterPrefixes();
 
             // Initialize UIService
             _uiService = new UIService(_configService, _storageService);
@@ -230,6 +236,8 @@ public override void Terminate()
             if (_host == null) return;
 
             _configService.Save();
+            _cacheManagerService.UnRegisterEvents();
+
 
             _host.MainWindow.ToolsMenu.DropDownItems.Remove(_tsShowSettings);