Add burndown panel

ext-src/KanbnBurndownPanel.ts

@@ -0,0 +1,168 @@
+import * as path from 'path';
+import * as vscode from 'vscode';
+
+export default class KanbnBurndownPanel {
+  public static currentPanel: KanbnBurndownPanel | undefined;
+
+  private static readonly viewType = 'react';
+
+  private readonly _panel: vscode.WebviewPanel;
+  private readonly _extensionPath: string;
+  private readonly _workspacePath: string;
+  private readonly _kanbn: typeof import('@basementuniverse/kanbn/src/main');
+  private _disposables: vscode.Disposable[] = [];
+
+  public static createOrShow(
+    extensionPath: string,
+    workspacePath: string,
+    kanbn: typeof import('@basementuniverse/kanbn/src/main')
+  ) {
+    const column = vscode.window.activeTextEditor ? vscode.window.activeTextEditor.viewColumn : undefined;
+
+    // If we already have a panel, show it, otherwise create a new panel
+    if (KanbnBurndownPanel.currentPanel) {
+      KanbnBurndownPanel.currentPanel._panel.reveal(column);
+    } else {
+      KanbnBurndownPanel.currentPanel = new KanbnBurndownPanel(
+        extensionPath,
+        workspacePath,
+        column || vscode.ViewColumn.One,
+        kanbn
+      );
+    }
+  }
+
+  public static async update() {
+    if (KanbnBurndownPanel.currentPanel) {
+      let index: any;
+      try {
+        index = await KanbnBurndownPanel.currentPanel._kanbn.getIndex();
+      } catch (error) {
+        vscode.window.showErrorMessage(error instanceof Error ? error.message : error);
+        return;
+      }
+      KanbnBurndownPanel.currentPanel._panel.webview.postMessage({
+        type: 'burndown',
+        index,
+        dateFormat: KanbnBurndownPanel.currentPanel._kanbn.getDateFormat(index)
+      });
+    }
+  }
+
+  private constructor(
+    extensionPath: string,
+    workspacePath: string,
+    column: vscode.ViewColumn,
+    kanbn: typeof import('@basementuniverse/kanbn/src/main')
+  ) {
+    this._extensionPath = extensionPath;
+    this._workspacePath = workspacePath;
+    this._kanbn = kanbn;
+
+    // Create and show a new webview panel
+    this._panel = vscode.window.createWebviewPanel(KanbnBurndownPanel.viewType, 'Burndown Chart', column, {
+      // Enable javascript in the webview
+      enableScripts: true,
+
+      // Retain state even when hidden
+      retainContextWhenHidden: true,
+
+      // Restrict the webview to only loading content from allowed paths
+      localResourceRoots: [
+        vscode.Uri.file(path.join(this._extensionPath, 'build')),
+        vscode.Uri.file(path.join(this._workspacePath, this._kanbn.getFolderName())),
+        vscode.Uri.file(path.join(this._extensionPath, 'node_modules', 'vscode-codicons', 'dist'))
+      ]
+    });
+    (this._panel as any).iconPath = {
+      light: vscode.Uri.file(path.join(this._extensionPath, 'resources', 'burndown_light.svg')),
+      dark: vscode.Uri.file(path.join(this._extensionPath, 'resources', 'burndown_dark.svg'))
+    };
+
+    // Set the webview's title to the kanbn project name
+    this._kanbn.getIndex().then(index => {
+      this._panel.title = index.name;
+    });
+
+    // Set the webview's initial html content
+    this._panel.webview.html = this._getHtmlForWebview();
+
+    // Listen for when the panel is disposed
+    // This happens when the user closes the panel or when the panel is closed programatically
+    this._panel.onDidDispose(() => this.dispose(), null, this._disposables);
+
+    // Handle messages from the webview
+    this._panel.webview.onDidReceiveMessage(async message => {
+      switch (message.command) {
+
+        // Display error message
+        case 'error':
+          vscode.window.showErrorMessage(message.text);
+          return;
+      }
+    }, null, this._disposables);
+  }
+
+  public dispose() {
+    KanbnBurndownPanel.currentPanel = undefined;
+
+    // Clean up our resources
+    this._panel.dispose();
+    while (this._disposables.length) {
+      const x = this._disposables.pop();
+      if (x) {
+        x.dispose();
+      }
+    }
+  }
+
+  private _getHtmlForWebview() {
+    const manifest = require(path.join(this._extensionPath, 'build', 'asset-manifest.json'));
+    const mainScript = manifest['main.js'];
+    const mainStyle = manifest['main.css'];
+    const scriptUri = vscode.Uri
+      .file(path.join(this._extensionPath, 'build', mainScript))
+      .with({ scheme: 'vscode-resource' });
+    const styleUri = vscode.Uri
+      .file(path.join(this._extensionPath, 'build', mainStyle))
+      .with({ scheme: 'vscode-resource' });
+    const customStyleUri = vscode.Uri
+      .file(path.join(this._workspacePath, this._kanbn.getFolderName(), 'board.css'))
+      .with({ scheme: 'vscode-resource' });
+    const codiconsUri = vscode.Uri
+      .file(path.join(this._extensionPath, 'node_modules', 'vscode-codicons', 'dist', 'codicon.css'))
+      .with({ scheme: 'vscode-resource' });
+
+    // Use a nonce to whitelist which scripts can be run
+    const nonce = getNonce();
+
+    return `<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width,initial-scale=1,shrink-to-fit=no">
+<meta name="theme-color" content="#000000">
+<title>Kanbn Board</title>
+<link rel="stylesheet" type="text/css" href="${styleUri}">
+<link rel="stylesheet" type="text/css" href="${customStyleUri}">
+<link rel="stylesheet" type="text/css" href="${codiconsUri}">
+<meta http-equiv="Content-Security-Policy" content="default-src 'none'; img-src vscode-resource: https:; script-src 'nonce-${nonce}'; font-src vscode-resource:; style-src vscode-resource: 'unsafe-inline' http: https: data:;">
+<base href="${vscode.Uri.file(path.join(this._extensionPath, 'build')).with({ scheme: 'vscode-resource' })}/">
+</head>
+<body>
+<noscript>You need to enable JavaScript to run this app.</noscript>
+<div id="root"></div>
+<script nonce="${nonce}" src="${scriptUri}"></script>
+</body>
+</html>`;
+  }
+}
+
+function getNonce() {
+  let text = "";
+  const possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+  for (let i = 0; i < 32; i++) {
+    text += possible.charAt(Math.floor(Math.random() * possible.length));
+  }
+  return text;
+}