feat: 添加文件写入 diff 预览和 LSP 诊断优化

- 文件写入/编辑前显示 diff 对比供用户确认 - LSP 诊断只显示错误和警告，忽略 hint/info - 优化 LSP 等待时间：首次启动 2s，后续 300ms
2025-12-11 00:44:42 +08:00
parent 929f6f7850
commit 09839b15a0
8 changed files with 646 additions and 29 deletions
@@ -0,0 +1,186 @@
+/**
+ * 文件操作确认提示
+ * 显示 diff 对比并让用户确认
+ */
+
+import * as readline from 'readline';
+import * as fs from 'fs/promises';
+import chalk from 'chalk';
+import type { FilePermissionContext, PermissionDecision } from './types.js';
+import { computeDiff, formatDiff, countChanges, formatEditDiff } from '../utils/diff.js';
+
+/**
+ * 显示文件写入的 diff 并请求确认
+ */
+export async function promptFileWrite(ctx: FilePermissionContext): Promise<PermissionDecision> {
+  const { path: filePath, newContent } = ctx;
+
+  if (!newContent) {
+    // 没有内容，使用简单确认
+    return promptSimpleConfirm(ctx);
+  }
+
+  // 读取原文件内容
+  let oldContent: string | null = null;
+  try {
+    oldContent = await fs.readFile(filePath, 'utf-8');
+  } catch {
+    // 文件不存在，是新文件
+  }
+
+  // 如果内容相同，直接允许
+  if (oldContent === newContent) {
+    return { allow: true, remember: false };
+  }
+
+  // 计算 diff
+  const diff = computeDiff(oldContent, newContent);
+  const changes = countChanges(diff);
+
+  // 显示 diff
+  console.log('');
+  console.log(chalk.yellow('📝 文件写入预览'));
+  console.log(chalk.cyan('文件: ') + chalk.white(filePath));
+
+  if (diff.isNew) {
+    console.log(chalk.green('状态: ') + chalk.white('新文件'));
+    console.log(chalk.green(`+${changes.additions} 行`));
+  } else {
+    console.log(chalk.green(`+${changes.additions} 行`) + ' / ' + chalk.red(`-${changes.deletions} 行`));
+  }
+
+  console.log('');
+  console.log(chalk.gray('─'.repeat(60)));
+
+  // 限制显示行数
+  const diffOutput = formatDiff(diff, filePath);
+  const lines = diffOutput.split('\n');
+  const MAX_LINES = 50;
+
+  if (lines.length > MAX_LINES) {
+    console.log(lines.slice(0, MAX_LINES).join('\n'));
+    console.log(chalk.yellow(`\n... 省略 ${lines.length - MAX_LINES} 行 ...`));
+  } else {
+    console.log(diffOutput);
+  }
+
+  console.log(chalk.gray('─'.repeat(60)));
+  console.log('');
+
+  // 询问用户确认
+  return promptConfirm();
+}
+
+/**
+ * 显示文件编辑的 diff 并请求确认
+ */
+export async function promptFileEdit(ctx: FilePermissionContext): Promise<PermissionDecision> {
+  const { path: filePath, oldContent, newContent } = ctx;
+
+  if (!oldContent || !newContent) {
+    // 没有内容，使用简单确认
+    return promptSimpleConfirm(ctx);
+  }
+
+  // 显示编辑 diff
+  console.log('');
+  console.log(chalk.yellow('✏️  文件编辑预览'));
+  console.log(chalk.cyan('文件: ') + chalk.white(filePath));
+  console.log('');
+  console.log(chalk.gray('─'.repeat(60)));
+  console.log(formatEditDiff(oldContent, newContent));
+  console.log(chalk.gray('─'.repeat(60)));
+  console.log('');
+
+  // 询问用户确认
+  return promptConfirm();
+}
+
+/**
+ * 简单确认（无 diff）
+ */
+async function promptSimpleConfirm(ctx: FilePermissionContext): Promise<PermissionDecision> {
+  const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout,
+  });
+
+  return new Promise((resolve) => {
+    console.log('');
+    console.log(chalk.yellow('⚠️  文件操作确认'));
+    console.log(chalk.cyan('操作: ') + chalk.white(ctx.operation));
+    console.log(chalk.cyan('文件: ') + chalk.white(ctx.path));
+    console.log('');
+
+    showConfirmOptions();
+
+    rl.question(chalk.yellow('请选择 [y/Y/n/N]: '), (answer) => {
+      rl.close();
+      resolve(parseAnswer(answer));
+    });
+  });
+}
+
+/**
+ * 通用确认提示
+ */
+async function promptConfirm(): Promise<PermissionDecision> {
+  const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout,
+  });
+
+  return new Promise((resolve) => {
+    showConfirmOptions();
+
+    rl.question(chalk.yellow('请选择 [y/Y/n/N]: '), (answer) => {
+      rl.close();
+      resolve(parseAnswer(answer));
+    });
+  });
+}
+
+/**
+ * 显示确认选项
+ */
+function showConfirmOptions(): void {
+  console.log(chalk.white('选择操作:'));
+  console.log(chalk.green('  [y] ') + '确认执行');
+  console.log(chalk.green('  [Y] ') + '确认执行，并记住此类操作（本次会话）');
+  console.log(chalk.red('  [n] ') + '拒绝执行');
+  console.log(chalk.red('  [N] ') + '拒绝执行，并记住此类操作（本次会话）');
+  console.log('');
+}
+
+/**
+ * 解析用户输入
+ */
+function parseAnswer(answer: string): PermissionDecision {
+  const choice = answer.trim();
+
+  switch (choice) {
+    case 'y':
+      return { allow: true, remember: false };
+    case 'Y':
+      return { allow: true, remember: true };
+    case 'N':
+      return { allow: false, remember: true };
+    case 'n':
+    default:
+      return { allow: false, remember: false };
+  }
+}
+
+/**
+ * 根据操作类型选择合适的确认提示
+ */
+export async function promptFilePermission(ctx: FilePermissionContext): Promise<PermissionDecision> {
+  switch (ctx.operation) {
+    case 'write':
+      return promptFileWrite(ctx);
+    case 'edit':
+      return promptFileEdit(ctx);
+    default:
+      return promptSimpleConfirm(ctx);
+  }
+}