Merge pull request #1 from Dumpy250/feature/cache

DRAFT: Feature/cache

.gitignore

@@ -396,3 +396,143 @@ FodyWeavers.xsd
 
 # JetBrains Rider
 *.sln.iml
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator-enh.xml
+.idea/**/markdown-navigator/
+
+# Cache file creation bug
+# See https://youtrack.jetbrains.com/issue/JBR-2257
+.idea/$CACHE_FILE$
+
+# CodeStream plugin
+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+# Azure Toolkit for IntelliJ plugin
+# https://plugins.jetbrains.com/plugin/8053-azure-toolkit-for-intellij
+.idea/**/azureSettings.xml
+
+### Rider ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+
+# AWS User-specific
+
+# Generated files
+
+# Sensitive or high-churn files
+
+# Gradle
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr

src/.idea/.idea.Markdowser/.idea/.name

@@ -0,0 +1 @@
+Markdowser

src/.idea/.idea.Markdowser/.idea/indexLayout.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="UserContentModel">
+    <attachedFolders />
+    <explicitIncludes />
+    <explicitExcludes />
+  </component>
+</project>

src/.idea/.idea.Markdowser/.idea/projectSettingsUpdater.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RiderProjectSettingsUpdater">
+    <option name="vcsConfiguration" value="2" />
+  </component>
+</project>

src/.idea/.idea.Markdowser/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

src/.idea/.idea.Markdowser/.idea/workspace.xml

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AutoGeneratedRunConfigurationManager">
+    <projectFile>Markdowser/Markdowser.csproj</projectFile>
+  </component>
+  <component name="AutoImportSettings">
+    <option name="autoReloadType" value="SELECTIVE" />
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="35ad98ab-fce0-4c9e-9180-ec9795d8ed8e" name="Changes" comment="" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="DpaMonitoringSettings">
+    <option name="autoShow" value="false" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
+  </component>
+  <component name="ProjectColorInfo"><![CDATA[{
+  "associatedIndex": 6
+}]]></component>
+  <component name="ProjectId" id="2fg8GifhQMdOrTygPnNJLDd0rxo" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent"><![CDATA[{
+  "keyToString": {
+    ".NET Project.Markdowser.executor": "Run",
+    "git-widget-placeholder": "develop",
+    "node.js.selected.package.tslint": "(autodetect)"
+  },
+  "keyToStringList": {
+    "rider.external.source.directories": [
+      "C:\\Users\\Camer\\AppData\\Roaming\\JetBrains\\Rider2024.1\\resharper-host\\DecompilerCache",
+      "C:\\Users\\Camer\\AppData\\Roaming\\JetBrains\\Rider2024.1\\resharper-host\\SourcesCache",
+      "C:\\Users\\Camer\\AppData\\Local\\Symbols\\src"
+    ]
+  }
+}]]></component>
+  <component name="RunManager">
+    <configuration name="Markdowser" type="DotNetProject" factoryName=".NET Project" temporary="true">
+      <option name="EXE_PATH" value="$PROJECT_DIR$/Markdowser/bin/Debug/net8.0/Markdowser.exe" />
+      <option name="PROGRAM_PARAMETERS" value="" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/Markdowser/bin/Debug/net8.0" />
+      <option name="PASS_PARENT_ENVS" value="1" />
+      <option name="USE_EXTERNAL_CONSOLE" value="0" />
+      <option name="USE_MONO" value="0" />
+      <option name="RUNTIME_ARGUMENTS" value="" />
+      <option name="PROJECT_PATH" value="$PROJECT_DIR$/Markdowser/Markdowser.csproj" />
+      <option name="PROJECT_EXE_PATH_TRACKING" value="1" />
+      <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
+      <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
+      <option name="PROJECT_KIND" value="DotNetCore" />
+      <option name="PROJECT_TFM" value="net8.0" />
+      <method v="2">
+        <option name="Build" />
+      </method>
+    </configuration>
+    <recent_temporary>
+      <list>
+        <item itemvalue=".NET Project.Markdowser" />
+      </list>
+    </recent_temporary>
+  </component>
+  <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
+  <component name="TaskManager">
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="3" />
+  </component>
+  <component name="UnityProjectConfiguration" hasMinimizedUI="false" />
+  <component name="VcsManagerConfiguration">
+    <option name="CLEAR_INITIAL_COMMIT_MESSAGE" value="true" />
+  </component>
+</project>

src/Markdowser/Utilities/CacheService.cs

@@ -0,0 +1,27 @@
+using Markdowser.ViewModels;
+
+using System.Collections.Generic;
+
+namespace Markdowser.Utilities;
+
+public class CacheService
+{
+    private readonly Dictionary<string, ContentViewModelBase> cache = [];
+
+    public ContentViewModelBase? Get(string url)
+    {
+        if (cache.TryGetValue(url, out ContentViewModelBase? value))
+        {
+            return value;
+        }
+        else
+        {
+            return null;
+        }
+    }
+
+    public void Set(string url, ContentViewModelBase content)
+    {
+        cache[url] = content;
+    }
+}

src/Markdowser/ViewModels/MainWindowViewModel.cs

@@ -25,6 +25,7 @@ public partial class MainWindowViewModel : ViewModelBase
 {
     private readonly HttpClient httpClient = new(new HttpClientHandler() { AllowAutoRedirect = true });
     private readonly ContentProcessorManager contentProcessorManager = new();
+    private readonly CacheService cacheService = new CacheService();
 
     private ContentViewModelBase content;
     private TabItem currentTab = null!;
@@ -48,7 +49,7 @@ public partial class MainWindowViewModel : ViewModelBase
 
             Url = value?.Tag?.ToString() ?? string.Empty;
 
-            FetchUrl();
+            FetchUrl(true);
         }
     }
 
@@ -99,7 +100,8 @@ public partial class MainWindowViewModel : ViewModelBase
     public bool BackEnabled => GlobalState.BackHistory.Count > 0;
     public bool ForwardEnabled => GlobalState.ForwardHistory.Count > 0;
     public bool ProgressIndeterminate => Progress == 0;
-    public ICommand Browse => ReactiveCommand.Create(FetchUrl);
+    public ICommand Browse => ReactiveCommand.Create(() => FetchUrl(true));
+    public ICommand Reload => ReactiveCommand.Create(() => FetchUrl(false));
 
     public ICommand Back => ReactiveCommand.Create(() =>
     {
@@ -208,7 +210,7 @@ public partial class MainWindowViewModel : ViewModelBase
         return Uri.TryCreate(uriString, UriKind.Absolute, out uri) && (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps);
     }
 
-    private void FetchUrl()
+    private void FetchUrl(bool useCache = true)
     {
         if (IsBusy)
         {
@@ -260,32 +262,41 @@ public partial class MainWindowViewModel : ViewModelBase
 
             try
             {
-                HttpResponseMessage httpResponseMessage = await httpClient.GetAsync(Url);
-
-                string? newUrl = httpResponseMessage.RequestMessage?.RequestUri?.ToString();
-
-                if (newUrl is not null && newUrl != Url)
+                ContentViewModelBase? cachedContent = cacheService.Get(Url);
+                if (cachedContent is not null && useCache)
                 {
-                    string oldUrl = Url;
-                    Dispatcher.UIThread.Post(() => WindowNotificationManager.Show(new Notification("Redirected", $"Redirected from\n{oldUrl}\nto\n{newUrl}", NotificationType.Warning)));
-                    Url = newUrl;
+                    Content = cachedContent;
                 }
-
-                if (!httpResponseMessage.IsSuccessStatusCode)
+                else
                 {
-                    IsBusy = false;
+                    HttpResponseMessage httpResponseMessage = await httpClient.GetAsync(Url);
 
-                    StringBuilder errorMessage = new();
+                    string? newUrl = httpResponseMessage.RequestMessage?.RequestUri?.ToString();
 
-                    _ = errorMessage.AppendLine($"# {(int)httpResponseMessage.StatusCode} {httpResponseMessage.StatusCode}");
-                    _ = errorMessage.AppendLine($"Failed to fetch URL: {httpResponseMessage.ReasonPhrase}");
+                    if (newUrl is not null && newUrl != Url)
+                    {
+                        string oldUrl = Url;
+                        Dispatcher.UIThread.Post(() => WindowNotificationManager.Show(new Notification("Redirected", $"Redirected from\n{oldUrl}\nto\n{newUrl}", NotificationType.Warning)));
+                        Url = newUrl;
+                    }
 
-                    Content = new MarkdownContentViewModel("Error", errorMessage.ToString());
-                    return;
+                    if (!httpResponseMessage.IsSuccessStatusCode)
+                    {
+                        IsBusy = false;
+
+                        StringBuilder errorMessage = new();
+
+                        _ = errorMessage.AppendLine($"# {(int)httpResponseMessage.StatusCode} {httpResponseMessage.StatusCode}");
+                        _ = errorMessage.AppendLine($"Failed to fetch URL: {httpResponseMessage.ReasonPhrase}");
+
+                        Content = new MarkdownContentViewModel("Error", errorMessage.ToString());
+                        return;
+                    }
+
+                    Content = await contentProcessorManager.ProcessContent(httpResponseMessage, new Progress<ProcessingProgress>(p => Progress = p.Percentage));
+                    cacheService.Set(Url, Content);
                 }
 
-                Content = await contentProcessorManager.ProcessContent(httpResponseMessage, new Progress<ProcessingProgress>(p => Progress = p.Percentage));
-
                 Dispatcher.UIThread.Post(() => CurrentTab.Header = Content.Title);
 
                 Logger.LogInfo($"Fetched URL: {Url}");

src/Markdowser/Views/Content/CommonImageContentView.axaml

@@ -8,7 +8,8 @@
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              xmlns:md="https://github.com/whistyun/Markdown.Avalonia"
              xmlns:ctxt="clr-namespace:ColorTextBlock.Avalonia;assembly=ColorTextBlock.Avalonia"
-             x:DataType="vm:Content.CommonImageContentViewModel"
+             xmlns:content="clr-namespace:Markdowser.ViewModels.Content"
+             x:DataType="content:CommonImageContentViewModel"
              x:Class="Markdowser.Views.Content.CommonImageContentView">
 
     <Grid>

src/Markdowser/Views/Content/MarkdownContentView.axaml

@@ -8,7 +8,8 @@
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              xmlns:md="https://github.com/whistyun/Markdown.Avalonia"
              xmlns:ctxt="clr-namespace:ColorTextBlock.Avalonia;assembly=ColorTextBlock.Avalonia"
-             x:DataType="vm:Content.MarkdownContentViewModel"
+             xmlns:content="clr-namespace:Markdowser.ViewModels.Content"
+             x:DataType="content:MarkdownContentViewModel"
              x:Class="Markdowser.Views.Content.MarkdownContentView">
 
     <UserControl.Resources>

src/Markdowser/Views/MainWindow.axaml

@@ -31,8 +31,8 @@
     </Window.Resources>
 
     <Window.KeyBindings>
-        <KeyBinding Gesture="Ctrl+R" Command="{Binding Browse}" />
-        <KeyBinding Gesture="F5" Command="{Binding Browse}" />
+        <KeyBinding Gesture="Ctrl+R" Command="{Binding Reload}" />
+        <KeyBinding Gesture="F5" Command="{Binding Reload}" />
         <KeyBinding Gesture="Alt+Home" Command="{StaticResource HomeCommand}" />
         <KeyBinding Gesture="Alt+H" Command="{StaticResource HomeCommand}" />
         <KeyBinding Gesture="Alt+Left" Command="{Binding Back}" />
@@ -104,7 +104,7 @@
                         </MultiBinding>
                     </Button.IsEnabled>
                 </Button>
-                <Button Grid.Column="2" i:Attached.Icon="fa-solid fa-rotate-right" Command="{Binding Browse}" IsEnabled="{Binding !IsBusy}" />
+                <Button Grid.Column="2" i:Attached.Icon="fa-solid fa-rotate-right" Command="{Binding Reload}" IsEnabled="{Binding !IsBusy}" />
                 <Button Grid.Column="3" i:Attached.Icon="fa-solid fa-house" Command="{StaticResource HomeCommand}" IsEnabled="{Binding !IsBusy}" />
 
                 <Grid Grid.Column="4">