274 lines
9.8 KiB
JavaScript
274 lines
9.8 KiB
JavaScript
const { Controller } = require('libflitter')
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const ncp = require('ncp').ncp
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const fs = require('fs').promises
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const path = require('path')
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const md = require('markdown').markdown
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const rimraf = require('rimraf')
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const uuid = require('uuid/v4')
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class ExportController extends Controller {
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static get services() {
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return [...super.services, 'models', 'utility', 'upload']
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}
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async get_export_list(req, res, next) {
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const Export = this.models.get('api:Export')
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const exports = await Export.find({
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user_id: req.user.id,
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})
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return res.api(exports)
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}
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async download_export(req, res, next) {
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const Export = this.models.get('api:Export')
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const exported = await Export.findOne({ UUID: req.params.ExportId, user_id: req.user.id })
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if ( !exported ) {
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return res.status(404)
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.message('No export with that UUID found.')
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.api()
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}
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const File = this.models.get('upload::File')
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const file = await File.findOne({_id: File.ObjectId(exported.file_id)})
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if ( !file ) return res.status(404).message('This export file has been deleted.').api({})
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return file.send(res)
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}
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async export_subtree(req, res, next) {
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const Export = this.models.get('api:Export')
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const format = req.form.format
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const page = req.form.page
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if ( format === 'html' ) {
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const generated_export = await this.export_subtree_as_html(page, req.user)
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// Store the generated archive
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const uploader = this.upload.provider()
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const file = await uploader.store({
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temp_path: generated_export,
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original_name: `export-${uuid()}.tar.gz`,
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mime_type: 'application/gzip',
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tag: 'generated_export',
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})
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const exp = new Export({
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user_id: req.user.id,
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format,
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subtree: true,
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file_id: file.id,
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PageId: page.UUID,
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})
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await exp.save()
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return res.api(exp)
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}
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return res.status(400)
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.message('Invalid export format!')
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.api()
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}
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async export_subtree_as_html(page, user) {
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const flat_tree = []
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const add_to_tree = async (page, level = 0) => {
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if ( await page.is_accessible_by(user, 'view') ) {
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flat_tree.push({
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level,
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page,
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file_name: `${page.Name.replace(/\s/g, '-')}-${page.UUID}.html`,
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})
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const children = await page.childPages
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for ( const child of children ) {
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await add_to_tree(child, level + 1)
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}
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}
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}
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await add_to_tree(page)
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const manifest = {
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sidebar: [],
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}
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for ( const item of flat_tree ) {
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manifest.sidebar.push({
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title: item.page.Name,
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level: item.level,
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link: item.file_name,
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})
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}
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// Copy the template over
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const work_dir = await this.scratch_dir()
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await this.copy_template(this.utility.path('app', 'assets', 'export', 'html'), work_dir)
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const html_template = await fs.readFile(path.resolve(work_dir, 'index.html'), 'utf-8')
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for ( const item of flat_tree ) {
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let item_template = html_template
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item_template = item_template.replace(/{{\s?MANIFEST\s?}}/g, JSON.stringify(manifest))
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item_template = item_template.replace(/{{\s?GROUP_TITLE\s?}}/g, page.Name)
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item_template = item_template.replace(/{{\s?PAGE_TITLE\s?}}/g, item.page.Name)
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item_template = item_template.replace(/{{\s?PAGE_CONTENT\s?}}/g, await this.page_as_html(item.page, work_dir))
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await fs.writeFile(path.resolve(work_dir, item.file_name), item_template)
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}
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// Write the main page redirect
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const redir_html = `
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="refresh" content="0; url=${flat_tree[0].file_name}">
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</head>
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</html>
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`
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await fs.writeFile(path.resolve(work_dir, 'index.html'), redir_html)
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// Create the archive
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const tar = require('tar')
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const archive_path = path.resolve(work_dir, '..', `export-${uuid()}.tar.gz`)
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await tar.c({
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gzip: true,
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file: archive_path,
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cwd: path.resolve(work_dir, '..'),
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}, [path.basename(work_dir)])
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await new Promise(res => {
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rimraf(work_dir, res)
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})
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return archive_path
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}
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async copy_template(from, to) {
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return new Promise((res, rej) => {
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ncp(from, to, err => {
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if ( err ) rej(err)
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else res()
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})
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})
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}
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async scratch_dir() {
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const tmp = require('tmp')
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const gen_id = uuid()
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return new Promise((res, rej) => {
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tmp.dir((err, tmp_path) => {
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if ( err ) rej(err)
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else {
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fs.mkdir(path.resolve(tmp_path, `export`)).then(() => {
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res(path.resolve(tmp_path, `export`))
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})
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}
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})
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})
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}
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/**
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* Given a page and a template working directory, render that page as HTML.
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* @param {Page} page
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* @param {string} work_dir
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* @return {Promise<string>}
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*/
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async page_as_html(page, work_dir) {
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const Codium = this.models.get('api:Codium')
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const FileGroup = this.models.get('api:FileGroup')
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const File = this.models.get('upload::File')
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const Database = this.models.get('api:db:Database')
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const DBEntry = this.models.get('api:db:DBEntry')
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let html = ''
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const nodes = await page.nodes
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for ( const node of nodes ) {
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// ATM, there are 5 node types: norm, markdown, database_ref, files_ref, and code_ref
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if ( node.Value.Mode === 'norm' ) {
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html += node.Value.Value
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} else if ( node.Value.Mode === 'markdown' ) {
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html += md.toHTML(node.Value.Value)
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} else if ( node.Type === 'code_ref' ) {
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const code = await Codium.findOne({ UUID: node.Value.Value })
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if ( code ) {
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const snip_file = `code-snippet-${code.UUID}.txt`
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await fs.writeFile(path.resolve(work_dir, snip_file), code.code)
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html += `
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<div class="code-ref">
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<wc-monaco-editor id="${code.UUID}" language="${code.Language}" src="${snip_file}"></wc-monaco-editor>
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</div>
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`
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}
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} else if ( node.Type === 'file_ref' ) {
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const file_group = await FileGroup.findOne({ UUID: node.Value.Value })
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if ( file_group ) {
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const file_htmls = []
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for ( const file_id of file_group.FileIds ) {
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const file = await File.findById(file_id)
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if ( file ) {
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const store_path = file.provider().filepath(file.store_id)
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const ext = file.original_name.split('.').reverse()[0]
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await this.copy_template(store_path, path.resolve(work_dir, `file-${file.upload_name}.${ext}`))
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file_htmls.push(`
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<div class="file">
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<div class="file-name">${file.original_name}</div>
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<a href="file-${file.upload_name}.${ext}" class="dl-link" target="_blank">▼</a>
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</div>
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`)
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}
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}
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html += `
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<div class="file-ref">
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${file_htmls.join('\n')}
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</div>`
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}
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} else if ( node.Type === 'database_ref' ) {
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const grid_id = `dbase-${node.Value.Value}`
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const db = await Database.findOne({ UUID: node.Value.Value })
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if ( db ) {
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html += `
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<div id="${grid_id}-container" class="database-container">
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<h4>${db.Name}</h4>
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<div id="${grid_id}" class="ag-theme-balham database-ref"></div>
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</div>
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<script src="${grid_id}.js"></script>
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`
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// generate the column defs
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const cols = await db.get_columns()
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const col_defs = cols.map(col => {
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return {
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field: col.field,
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headerName: col.headerName,
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}
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})
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// generate the data rows
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const entries = await DBEntry.find({ DatabaseId: db.UUID })
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const rows = entries.map(entry => entry.RowData)
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let dbTemplateContents = await fs.readFile(path.resolve(work_dir, 'database.js'), 'utf-8')
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dbTemplateContents = dbTemplateContents.replace(/{{\s?COLUMN_DEFS\s?}}/g, JSON.stringify(col_defs))
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dbTemplateContents = dbTemplateContents.replace(/{{\s?ROW_DATA\s?}}/g, JSON.stringify(rows))
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dbTemplateContents = dbTemplateContents.replace(/{{\s?GRID_ID\s?}}/g, grid_id)
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await fs.writeFile(path.resolve(work_dir, `${grid_id}.js`), dbTemplateContents)
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}
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}
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}
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return html
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}
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}
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module.exports = exports = ExportController
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