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Boostnote/browser/main/lib/dataApi/exportNote.js

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import copyFile from 'browser/main/lib/dataApi/copyFile'
import { findStorage } from 'browser/lib/findStorage'
const fs = require('fs')
const path = require('path')
const attachmentManagement = require('./attachmentManagement')
/**
* Export note together with attachments
*
* If attachments are stored in the storage, creates 'attachments' subfolder in target directory
* and copies attachments to it. Changes links to images in the content of the note
*
* @param {String} nodeKey key of the node that should be exported
* @param {String} storageKey or storage path
* @param {String} noteContent Content to export
* @param {String} targetPath Path to exported file
* @param {function} outputFormatter
* @return {Promise.<*[]>}
*/
function exportNote(
nodeKey,
storageKey,
noteContent,
targetPath,
outputFormatter
) {
const storagePath = path.isAbsolute(storageKey)
? storageKey
: findStorage(storageKey).path
const exportTasks = []
if (!storagePath) {
throw new Error('Storage path is not found')
}
const attachmentsAbsolutePaths = attachmentManagement.getAbsolutePathsOfAttachmentsInContent(
noteContent,
storagePath
)
attachmentsAbsolutePaths.forEach(attachment => {
exportTasks.push({
src: attachment,
dst: attachmentManagement.DESTINATION_FOLDER
})
})
let exportedData = attachmentManagement.removeStorageAndNoteReferences(
noteContent,
nodeKey
)
if (outputFormatter) {
exportedData = outputFormatter(exportedData, exportTasks, targetPath)
} else {
exportedData = Promise.resolve(exportedData)
}
const tasks = prepareTasks(exportTasks, storagePath, path.dirname(targetPath))
return Promise.all(tasks.map(task => copyFile(task.src, task.dst)))
.then(() => exportedData)
.then(data => {
return saveToFile(data, targetPath)
})
.catch(err => {
rollbackExport(tasks)
throw err
})
}
function prepareTasks(tasks, storagePath, targetPath) {
return tasks.map(task => {
if (!path.isAbsolute(task.src)) {
task.src = path.join(storagePath, task.src)
}
if (!path.isAbsolute(task.dst)) {
task.dst = path.join(targetPath, task.dst)
}
return task
})
}
function saveToFile(data, filename) {
return new Promise((resolve, reject) => {
fs.writeFile(filename, data, err => {
if (err) return reject(err)
resolve(filename)
})
})
}
/**
* Remove exported files
* @param tasks Array of copy task objects. Object consists of two mandatory fields `src` and `dst`
*/
function rollbackExport(tasks) {
const folders = new Set()
tasks.forEach(task => {
let fullpath = task.dst
if (!path.extname(task.dst)) {
fullpath = path.join(task.dst, path.basename(task.src))
}
if (fs.existsSync(fullpath)) {
fs.unlink(fullpath)
folders.add(path.dirname(fullpath))
}
})
folders.forEach(folder => {
if (fs.readdirSync(folder).length === 0) {
fs.rmdir(folder)
}
})
}
export default exportNote