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// needs refactoring
import Path from './path'
import MODE from './mode'
import Node from './node'
import Stats from './stats'
import FileInfo from './fileinfo'
import IndexedDbStorage from '../storages/indexeddb'
export default class FileSystem {
constructor (opts = {}) {
this.storage = opts.storage ||
new IndexedDbStorage((opts && opts.name) || 'default')
}
async mkdir (path) {
path = new Path(path).normalize()
const data = await this.exists(path)
if (data) {
return data.path
}
const parent = await this.exists(path.parent)
const parentId = parent ? parent.path : 0
if (!path.parent.isRoot && !parent) {
throw new Error('parent is not created yet')
} else Iif (parent && parent.node.mode !== MODE.DIR) {
throw new Error('parent is not dir')
}
const node = new Node(path.path, MODE.DIR, 0)
return this.storage.create(path.path, node, parentId)
}
// Recursively creates directory, eq. to mkdir -p
async mkdirParents (path, root = '') {
path = new Path(path).normalize()
const mparts = path.path.split('/')
const mroot = root === '' ? '/' : `${root}/`
const currentPath = mroot + mparts.shift()
if (mparts.length === 0) {
return this.mkdir(currentPath)
}
await this.mkdir(currentPath)
return this.mkdirParents(mparts.join('/'), currentPath)
}
async rmdir (path) {
path = new Path(path).normalize()
const data = await this.exists(path)
let isEmpty = false
if (!data) {
throw new Error('dir does not exists')
} else if (data.node.mode === MODE.DIR) {
isEmpty = await this.storage.isEmpty(data.path)
} else {
throw new Error('it is not a dir')
}
if (isEmpty) {
await this.storage.remove(path.path)
} else {
throw new Error('dir is not empty')
}
}
async readFile (path, options) {
path = new Path(path).normalize()
const data = await this.storage.get(path.path)
if (!data) {
throw new Error(`File ${path.path} does not exist`)
}
return data.node.data
}
async writeFile (path, data, options) {
path = new Path(path).normalize()
Iif (!(data instanceof Blob)) {
throw new Error('data must be instance of Blob')
}
const parent = await this.exists(path.parent)
if (!parent) {
throw new Error('file needs parent')
} else Iif (parent && parent.node.mode !== MODE.DIR) {
throw new Error('parent should be dir')
}
const parentId = parent.path
const node = new Node(path.path, MODE.FILE, data.size, options, data)
return this.storage.put(path.path, node, parentId)
}
// Same as writeFile but it recursively creates directory
// if not exists
async outputFile (path, data, options) {
path = new Path(path).normalize()
Iif (!(data instanceof Blob)) {
throw new Error('data must be instance of Blob')
}
const parentPath = await this.mkdirParents(path.parent)
const parent = await this.exists(parentPath)
Iif (parent && parent.node.mode !== MODE.DIR) {
throw new Error('parent should be dir')
}
const parentId = parent.path
const node = new Node(path.path, MODE.FILE, data.size, options, data)
return this.storage.put(path.path, node, parentId)
}
// Dexie specific to insert multiple files in one go
// Chrome is quite slow with lots of insertion, hence
// this makes chrome happy
// https://dev.to/skhmt/why-are-indexeddb-operations-significantly-slower-in-chrome-vs-firefox-1bnd
async bulkOutputFiles (objs) {
return this.storage.transaction('rw', async () => {
for (let i = 0; i < objs.length; i++) {
const o = objs[i]
await this.outputFile(o.path, o.blob, o.options || {})
}
})
}
async rename (oldPath, newPath) {
throw new Error('not implemented')
}
async unlink (path) {
path = new Path(path).normalize()
const data = await this.exists(path)
if (!data) {
throw new Error('file does not exists')
} else Iif (data.node.mode === MODE.DIR) {
throw new Error('path points to a directory, please use rmdir')
} else {
return this.storage.remove(data.path)
}
}
async rmdirRecursive (path) {
path = new Path(path).normalize()
const data = await this.exists(path)
Iif (!data) return true
Iif (data.node.mode !== MODE.DIR) return this.unlink(path)
const list = await this.ls(path)
for (const element of list) {
if (element.node.mode !== MODE.DIR) await this.unlink(element.path)
else await this.rmdirRecursive(element.path)
}
return this.rmdir(path)
}
async exists (path) {
path = new Path(path).normalize()
return this.storage.get(path.path)
}
async stats (path) {
const data = await this.exists(path)
Eif (data) return new Stats(data.node, this.path)
else throw new Error('path does not exist')
}
async ls (path, filters = {}) {
const filterKeys = Object.keys(filters)
const data = await this.exists(path)
Eif (data) {
let nodes = await this.storage.where({ parentId: data.path })
if (filterKeys.length > 0) {
nodes = nodes.filter((node) => {
const fileInfo = new FileInfo(node.node, node.path)
return filterKeys.some((key) => {
return fileInfo[key] === filters[key]
})
})
}
return nodes.map(node => new FileInfo(node.node, node.path))
}
throw new Error('path does not exist')
}
}
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