implement cache attempt

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 +1,30 @@
+using Markdowser.ViewModels;
+using System.Collections.Generic;
+
+namespace Markdowser.Utilities
+{
+    namespace Markdowser.Utilities
+    {
+        public class CacheService
+        {
+            private Dictionary<string, ContentViewModelBase> cache = new Dictionary<string, ContentViewModelBase>();
+
+            public ContentViewModelBase Get(string url)
+            {
+                if (cache.ContainsKey(url))
+                {
+                    return cache[url];
+                }
+                else
+                {
+                    return null;
+                }
+            }
+
+            public void Set(string url, ContentViewModelBase content)
+            {
+                cache[url] = content;
+            }
+        }
+    }
+}

src/Markdowser/ViewModels/MainWindowViewModel.cs

@@ -6,6 +6,7 @@ using Markdowser.Models;
 using Markdowser.Processing;
 using Markdowser.Processing.Processors;
 using Markdowser.Utilities;
+using Markdowser.Utilities.Markdowser.Utilities;
 using Markdowser.ViewModels.Content;
 
 using ReactiveUI;
@@ -26,6 +27,7 @@ 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!;
@@ -196,50 +198,57 @@ 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()
+{
+    if (IsBusy)
     {
-        if (IsBusy)
+        WindowNotificationManager.Show(new Notification("Busy", "The browser is currently busy.", NotificationType.Warning));
-        {
+        return;
-            WindowNotificationManager.Show(new Notification("Busy", "The browser is currently busy.", NotificationType.Warning));
+    }
-            return;
-        }
 
-        if (string.IsNullOrWhiteSpace(Url))
+    if (string.IsNullOrWhiteSpace(Url))
-        {
+    {
-            Content = DefaultContent;
+        Content = DefaultContent;
-            Debug.WriteLine("URL is empty.");
+        Debug.WriteLine("URL is empty.");
-            CurrentTab.Header = "New Tab";
+        CurrentTab.Header = "New Tab";
-            return;
+        return;
-        }
+    }
 
-        if (!IsValidHttpUri(Url, out _))
+    if (!IsValidHttpUri(Url, out _))
+    {
+        if (Url.StartsWith("//"))
         {
-            if (Url.StartsWith("//"))
+            Url = $"https:{Url}";
+        }
+        else
+        {
+            // Search with duckduckgo
+            try
             {
-                Url = $"https:{Url}";
+                Url = string.Format(Settings.Current.SearchEngineUrl, Uri.EscapeDataString(Url));
+            }
+            catch (FormatException ex)
+            {
+                WindowNotificationManager.Show(new Notification("Invalid Search Engine URL", $"{ex.Message}", NotificationType.Error));
+            }
+        }
+    }
+
+    IsBusy = true;
+    Progress = 0;
+
+    _ = Task.Run(async () =>
+    {
+        Debug.WriteLine("Fetching URL...");
+
+        try
+        {
+            ContentViewModelBase cachedContent = cacheService.Get(Url);
+            if (cachedContent != null)
+            {
+                Content = cachedContent;
             }
             else
-            {
-                // Search with duckduckgo
-                try
-                {
-                    Url = string.Format(Settings.Current.SearchEngineUrl, Uri.EscapeDataString(Url));
-                }
-                catch (FormatException ex)
-                {
-                    WindowNotificationManager.Show(new Notification("Invalid Search Engine URL", $"{ex.Message}", NotificationType.Error));
-                }
-            }
-        }
-
-        IsBusy = true;
-        Progress = 0;
-
-        _ = Task.Run(async () =>
-        {
-            Debug.WriteLine("Fetching URL...");
-
-            try
             {
                 HttpResponseMessage httpResponseMessage = await httpClient.GetAsync(Url);
 
@@ -266,42 +275,44 @@ public partial class MainWindowViewModel : ViewModelBase
                 }
 
                 Content = await contentProcessorManager.ProcessContent(httpResponseMessage, new Progress<ProcessingProgress>(p => Progress = p.Percentage));
-
+                cacheService.Set(Url, Content);
-                Dispatcher.UIThread.Post(() => CurrentTab.Header = Content.Title);
             }
-            catch (HttpRequestException e)
+
+            Dispatcher.UIThread.Post(() => CurrentTab.Header = Content.Title);
+        }
+        catch (HttpRequestException e)
+        {
+            StringBuilder errorMessage = new();
+
+            if (e.StatusCode is not null)
             {
-                StringBuilder errorMessage = new();
+                _ = errorMessage.AppendLine($"# {(int)e.StatusCode} {e.StatusCode}");
-
+                Dispatcher.UIThread.Post(() => CurrentTab.Header = $"Error: {(int)e.StatusCode} {e.StatusCode}");
-                if (e.StatusCode is not null)
-                {
-                    _ = errorMessage.AppendLine($"# {(int)e.StatusCode} {e.StatusCode}");
-                    Dispatcher.UIThread.Post(() => CurrentTab.Header = $"Error: {(int)e.StatusCode} {e.StatusCode}");
-                }
-                else
-                {
-                    Dispatcher.UIThread.Post(() => CurrentTab.Header = $"Error: {e.GetType().Name}");
-                }
-
-                _ = errorMessage.AppendLine($"# {e.HttpRequestError}");
-                _ = errorMessage.AppendLine($"Failed to fetch URL: {e.Message}");
-
-                Content = new MarkdownContentViewModel("Error", errorMessage.ToString());
             }
-            catch (Exception e)
+            else
             {
-                StringBuilder errorMessage = new();
-
-                _ = errorMessage.AppendLine($"# {e.GetType().Name}");
-                _ = errorMessage.AppendLine($"Failed to fetch URL: {e.Message}");
-
-                Content = new MarkdownContentViewModel("Error", errorMessage.ToString());
                 Dispatcher.UIThread.Post(() => CurrentTab.Header = $"Error: {e.GetType().Name}");
             }
-            finally
+
-            {
+            _ = errorMessage.AppendLine($"# {e.HttpRequestError}");
-                IsBusy = false;
+            _ = errorMessage.AppendLine($"Failed to fetch URL: {e.Message}");
-            }
+
-        });
+            Content = new MarkdownContentViewModel("Error", errorMessage.ToString());
-    }
+        }
+        catch (Exception e)
+        {
+            StringBuilder errorMessage = new();
+
+            _ = errorMessage.AppendLine($"# {e.GetType().Name}");
+            _ = errorMessage.AppendLine($"Failed to fetch URL: {e.Message}");
+
+            Content = new MarkdownContentViewModel("Error", errorMessage.ToString());
+            Dispatcher.UIThread.Post(() => CurrentTab.Header = $"Error: {e.GetType().Name}");
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    });
+}
 }

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>