Added translation progress to sections

I18N Commander/UI WinForms/Components/SectionTree.cs

@@ -1,4 +1,5 @@
-using Processor;
+using DataModel.Database;
+using Processor;
 using UI_WinForms.Dialogs;
 using UI_WinForms.Resources;
 
@@ -6,6 +7,8 @@ namespace UI_WinForms.Components;
 
 public partial class SectionTree : UserControl
 {
+    private static readonly Dictionary<TreeNode, EventHandler<DataModel.Database.Translation?>> NODE_PROGRESS_HANDLERS = new();
+
     public SectionTree()
     {
         this.InitializeComponent();
@@ -46,17 +49,23 @@ public partial class SectionTree : UserControl
         {
             foreach (var section in await SectionProcessor.LoadLayer(i))
             {
+                var translationProgress = await TranslationProcessor.CalculateTranslationProgress(section);
+                
                 // Create the tree node:
                 var node = new TreeNode
                 {
                     Name = section.DataKey, // [sic] name is the key
-                    Text = section.Name,
+                    Text = $"{section.Name} [{translationProgress.Result}%]",
                     StateImageIndex = 1,
                 };
                 
                 // Cache the node:
                 treeNodes.Add(section.DataKey, node);
                 
+                // Wire each node to the translation change event to update the translation progress:
+                NODE_PROGRESS_HANDLERS.Add(node, async (_, translation) => await this.UpdateTranslationProgress(node, section, translation));
+                AppEvents.WhenTranslationChanged += NODE_PROGRESS_HANDLERS[node];
+                
                 // Is this a root node?
                 if (section.Depth is 0)
                     
@@ -107,6 +116,18 @@ public partial class SectionTree : UserControl
         this.treeView.ExpandAll();
     }
 
+    private async Task UpdateTranslationProgress(TreeNode node, Section section, DataModel.Database.Translation? translation)
+    {
+        if (translation is null || translation.TextElement.Section.DataKey == section.DataKey)
+        {
+            var currentTranslationProgress = await TranslationProcessor.CalculateTranslationProgress(section);
+            if(this.treeView.InvokeRequired)
+                this.treeView.Invoke(() => node.Text = $"{section.Name} [{currentTranslationProgress.Result}%]");
+            else
+                node.Text = $"{section.Name} [{currentTranslationProgress.Result}%]";
+        }
+    }
+    
     private async void buttonAdd_Click(object sender, EventArgs e)
     {
         if(this.DesignMode)
@@ -135,13 +156,19 @@ public partial class SectionTree : UserControl
         if(!addedSection.Successful)
             return;
         
+        var translationProgress = await TranslationProcessor.CalculateTranslationProgress(addedSection.Result!);
+        
         // Add the new section to the tree control:
         var node = new TreeNode
         {
             Name = addedSection.Result!.DataKey, // [sic] name is the key
-            Text = addedSection.Result.Name,
+            Text = $"{addedSection.Result.Name} [{translationProgress.Result}%]",
             StateImageIndex = 1,
         };
+        
+        // Wire each node to the translation change event to update the translation progress:
+        NODE_PROGRESS_HANDLERS.Add(node, async (_, translation) => await this.UpdateTranslationProgress(node, addedSection.Result, translation));
+        AppEvents.WhenTranslationChanged += NODE_PROGRESS_HANDLERS[node];
 
         if(!addRootNode && selectedNode is not null)
             selectedNode.Nodes.Add(node);
@@ -171,14 +198,18 @@ public partial class SectionTree : UserControl
         // Ask the user, if he really wants to remove the section:
         if(MessageBox.Show(numberChildren > 0 ? $"Are you sure, you want to remove the section '{selectedNode.Text}', its {numberChildren} children and so on?" : $"Are you sure, you want to remove the section '{selectedNode.Text}'?", "Remove section", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.No)
             return;
-        
+
         // Remove the section from the database:
         // (notice, that the node's name is its key)
         await SectionProcessor.RemoveSection(selectedNode.Name);
         
         // Remove all nodes from the tree control:
         this.treeView.Nodes.Clear();
+        foreach (var (treeNode, handler) in NODE_PROGRESS_HANDLERS)
+            AppEvents.WhenTranslationChanged -= handler;
         
+        NODE_PROGRESS_HANDLERS.Clear();
+
         // Reload the tree:
         this.LoadNodes(this, EventArgs.Empty);
         
@@ -187,6 +218,8 @@ public partial class SectionTree : UserControl
         
         // Fire the click event:
         this.treeView_NodeMouseClick(this, new TreeNodeMouseClickEventArgs(this.treeView.SelectedNode!, MouseButtons.Left, 1, 0, 0));
+        
+        AppEvents.TranslationChanged(null);
     }
 
     private async void treeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)