add duplicate

src/server/service/page.js

@@ -1,3 +1,7 @@
+const mongoose = require('mongoose');
+const escapeStringRegexp = require('escape-string-regexp');
+const { serializePageSecurely } = require('../models/serializers/page-serializer');
+
 class PageService {
 
   constructor(crowi) {
@@ -38,6 +42,49 @@ class PageService {
     return Promise.all(promises);
   }
 
+  async duplicate(page, newPagePath, user) {
+    const Page = this.crowi.model('Page');
+    const PageTagRelation = mongoose.model('PageTagRelation');
+    // populate
+    await page.populate({ path: 'revision', model: 'Revision', select: 'body' }).execPopulate();
+
+    // create option
+    const options = { page };
+    options.grant = page.grant;
+    options.grantUserGroupId = page.grantedGroup;
+    options.grantedUsers = page.grantedUsers;
+
+    const createdPage = await Page.create(
+      newPagePath, page.revision.body, user, options,
+    );
+
+    // take over tags
+    const originTags = await page.findRelatedTagsById();
+    let savedTags = [];
+    if (originTags != null) {
+      await PageTagRelation.updatePageTags(createdPage.id, originTags);
+      savedTags = await PageTagRelation.listTagNamesByPage(createdPage.id);
+    }
+
+    return { page: serializePageSecurely(createdPage), tags: savedTags };
+  }
+
+  async duplicateRecursively(page, newPagePath, user) {
+    const Page = this.crowi.model('Page');
+    const newPagePathPrefix = newPagePath;
+    const pathRegExp = new RegExp(`^${escapeStringRegexp(page.path)}`, 'i');
+
+    const pages = await Page.findManageableListWithDescendants(page, user);
+
+    const promise = pages.map(async(page) => {
+      const newPagePath = page.path.replace(pathRegExp, newPagePathPrefix);
+      return this.duplicate(page, newPagePath, user);
+    });
+
+    // TODO GW-4634 use stream
+    return Promise.allSettled(promise);
+  }
+
 
 }