feat: 优化桌面文件默认保存路径

apps/desktop/src/desktop-application-controller.ts

@@ -75,6 +75,7 @@ import {
   type WindowState
 } from "./window-state.js";
 import { getWindowCloseDecision } from "./window-close-policy.js";
+import { SaveLocationStore } from "./save-location-state.js";
 
 const DEFAULT_WINDOW_SIZE = { width: 1440, height: 960 };
 const MINIMUM_WINDOW_SIZE = { width: 1024, height: 720 };
@@ -113,6 +114,8 @@ export interface DesktopApplicationControllerOptions {
   iconPath: string;
   themeDirectory: string;
   windowStatePath: string;
+  saveLocationStatePath: string;
+  documentsDirectory: string;
 }
 
 function focusWindow(window: BrowserWindow) {
@@ -134,6 +137,7 @@ export class DesktopApplicationController {
   readonly #iconPath: string;
   readonly #themeDirectory: string;
   readonly #windowStatePath: string;
+  readonly #saveLocationStore: SaveLocationStore;
   readonly #pdfGenerator: ElectronPdfGenerator;
   readonly #docxExportService: DocxExportService;
   readonly #docxMediaEngine: ElectronDocxMediaEngine;
@@ -153,6 +157,10 @@ export class DesktopApplicationController {
     this.#iconPath = options.iconPath;
     this.#themeDirectory = options.themeDirectory;
     this.#windowStatePath = options.windowStatePath;
+    this.#saveLocationStore = new SaveLocationStore(
+      options.saveLocationStatePath,
+      options.documentsDirectory
+    );
     this.#pdfGenerator = new ElectronPdfGenerator({
       renderUrl: options.renderUrl,
       preloadPath: options.pdfPreloadPath
@@ -181,12 +189,22 @@ export class DesktopApplicationController {
   }
 
   async initialize() {
-    this.#savedWindowState = await loadWindowState(
-      this.#windowStatePath
-    );
+    const [savedWindowState] = await Promise.all([
+      loadWindowState(this.#windowStatePath),
+      this.#saveLocationStore.initialize()
+    ]);
+    this.#savedWindowState = savedWindowState;
     this.#registerIpcHandlers();
   }
 
+  async #recordSuccessfulFile(filePath: string) {
+    await this.#saveLocationStore
+      .recordSuccessfulFile(filePath)
+      .catch((error: unknown) => {
+        console.warn("无法持久化最近保存目录", error);
+      });
+  }
+
   async createWindow(filePath?: string) {
     let pendingSnapshot: MarkdownFileSnapshot | undefined;
     if (filePath) {
@@ -733,9 +751,10 @@ export class DesktopApplicationController {
               ? "另存为 Markdown"
               : "保存 Markdown",
             defaultPath:
-              forceSaveAs && session.currentFilePath
-                ? session.currentFilePath
-                : path.join(app.getPath("documents"), suggestedName),
+              await this.#saveLocationStore.resolveDefaultPath(
+                session.currentFilePath,
+                suggestedName
+              ),
             filters: [
               {
                 name: "Markdown 文件",
@@ -788,6 +807,7 @@ export class DesktopApplicationController {
           throw new Error("该 Markdown 已在另一个窗口中打开");
         }
         this.#commitSnapshot(session, snapshot);
+        await this.#recordSuccessfulFile(targetPath);
         return { fileName: snapshot.document.fileName };
       };
 
@@ -905,16 +925,18 @@ export class DesktopApplicationController {
           : `${path.basename(unsafeFileName)}.pdf`;
         const selection = await dialog.showSaveDialog(session.window, {
           title: "导出 PDF",
-          defaultPath: path.join(
-            app.getPath("documents"),
-            suggestedName
-          ),
+          defaultPath:
+            await this.#saveLocationStore.resolveDefaultPath(
+              session.currentFilePath,
+              suggestedName
+            ),
           filters: [{ name: "PDF 文件", extensions: ["pdf"] }]
         });
         if (selection.canceled || !selection.filePath) {
           return false;
         }
         await writeFile(selection.filePath, unsafePdf);
+        await this.#recordSuccessfulFile(selection.filePath);
         return true;
       }
     );
@@ -971,10 +993,11 @@ export class DesktopApplicationController {
             session.window,
             {
               title: "导出 DOCX",
-              defaultPath: path.join(
-                app.getPath("documents"),
-                generated.fileName
-              ),
+              defaultPath:
+                await this.#saveLocationStore.resolveDefaultPath(
+                  session.currentFilePath,
+                  generated.fileName
+                ),
               filters: [
                 {
                   name: "Word 文档",
@@ -996,6 +1019,7 @@ export class DesktopApplicationController {
             selection.filePath,
             generated.docx
           );
+          await this.#recordSuccessfulFile(saved.targetPath);
           return {
             ok: true,
             saved: true,

apps/desktop/src/main.ts

@@ -337,7 +337,12 @@ if (!hasSingleInstanceLock) {
         windowStatePath: path.join(
           app.getPath("userData"),
           "window-state.json"
-        )
+        ),
+        saveLocationStatePath: path.join(
+          app.getPath("userData"),
+          "save-location.json"
+        ),
+        documentsDirectory: app.getPath("documents")
       });
       await applicationController.initialize();
 

apps/desktop/src/save-location-state.ts

@@ -0,0 +1,164 @@
+import {
+  mkdir,
+  readFile,
+  rename,
+  rm,
+  stat,
+  writeFile
+} from "node:fs/promises";
+import path from "node:path";
+
+const SAVE_LOCATION_STATE_VERSION = 1;
+
+export interface SaveLocationState {
+  version: 1;
+  directory: string;
+}
+
+export interface ResolveDefaultSavePathOptions {
+  sourceFilePath?: string;
+  lastSaveDirectory?: string;
+  documentsDirectory: string;
+  suggestedFileName: string;
+}
+
+export function parseSaveLocationState(
+  value: unknown
+): SaveLocationState | undefined {
+  if (!value || typeof value !== "object") {
+    return undefined;
+  }
+  const state = value as Partial<SaveLocationState>;
+  if (
+    state.version !== SAVE_LOCATION_STATE_VERSION ||
+    typeof state.directory !== "string" ||
+    !path.isAbsolute(state.directory)
+  ) {
+    return undefined;
+  }
+  return {
+    version: SAVE_LOCATION_STATE_VERSION,
+    directory: path.resolve(state.directory)
+  };
+}
+
+async function isAvailableDirectory(directory: string | undefined) {
+  if (!directory || !path.isAbsolute(directory)) {
+    return false;
+  }
+  try {
+    return (await stat(directory)).isDirectory();
+  } catch {
+    return false;
+  }
+}
+
+function assertSuggestedFileName(value: string) {
+  const fileName = path.basename(value.trim());
+  if (!fileName || fileName === ".") {
+    throw new Error("默认保存文件名无效");
+  }
+  return fileName;
+}
+
+export async function resolveDefaultSavePath(
+  options: ResolveDefaultSavePathOptions
+) {
+  const fileName = assertSuggestedFileName(
+    options.suggestedFileName
+  );
+  const sourceDirectory = options.sourceFilePath
+    ? path.dirname(path.resolve(options.sourceFilePath))
+    : undefined;
+  if (await isAvailableDirectory(sourceDirectory)) {
+    return path.join(sourceDirectory!, fileName);
+  }
+  if (await isAvailableDirectory(options.lastSaveDirectory)) {
+    return path.join(options.lastSaveDirectory!, fileName);
+  }
+  return path.join(
+    path.resolve(options.documentsDirectory),
+    fileName
+  );
+}
+
+export async function loadSaveLocationState(filePath: string) {
+  try {
+    return parseSaveLocationState(
+      JSON.parse(await readFile(filePath, "utf8")) as unknown
+    );
+  } catch {
+    return undefined;
+  }
+}
+
+export async function saveSaveLocationState(
+  filePath: string,
+  directory: string
+) {
+  const state = parseSaveLocationState({
+    version: SAVE_LOCATION_STATE_VERSION,
+    directory
+  });
+  if (!state) {
+    throw new Error("最近保存目录无效");
+  }
+  await mkdir(path.dirname(filePath), { recursive: true });
+  const temporaryPath = `${filePath}.${process.pid}.tmp`;
+  try {
+    await writeFile(
+      temporaryPath,
+      `${JSON.stringify(state, null, 2)}\n`,
+      "utf8"
+    );
+    await rename(temporaryPath, filePath);
+  } catch (error) {
+    await rm(temporaryPath, { force: true }).catch(() => undefined);
+    throw error;
+  }
+  return state;
+}
+
+export class SaveLocationStore {
+  readonly #statePath: string;
+  readonly #documentsDirectory: string;
+  #lastSaveDirectory: string | undefined;
+  #pendingWrite = Promise.resolve();
+
+  constructor(statePath: string, documentsDirectory: string) {
+    this.#statePath = statePath;
+    this.#documentsDirectory = documentsDirectory;
+  }
+
+  async initialize() {
+    this.#lastSaveDirectory = (
+      await loadSaveLocationState(this.#statePath)
+    )?.directory;
+  }
+
+  resolveDefaultPath(
+    sourceFilePath: string | undefined,
+    suggestedFileName: string
+  ) {
+    return resolveDefaultSavePath({
+      documentsDirectory: this.#documentsDirectory,
+      suggestedFileName,
+      ...(sourceFilePath ? { sourceFilePath } : {}),
+      ...(this.#lastSaveDirectory
+        ? { lastSaveDirectory: this.#lastSaveDirectory }
+        : {})
+    });
+  }
+
+  async recordSuccessfulFile(filePath: string) {
+    const directory = path.dirname(path.resolve(filePath));
+    this.#lastSaveDirectory = directory;
+    const write = this.#pendingWrite
+      .catch(() => undefined)
+      .then(() =>
+        saveSaveLocationState(this.#statePath, directory)
+      );
+    this.#pendingWrite = write.then(() => undefined);
+    await write;
+  }
+}