Big update

.gitignore

@@ -104,3 +104,4 @@ dist
 .tern-port
 
 .idea
+.history

.vscode/settings.json

@@ -0,0 +1,15 @@
+{
+  "files.insertFinalNewline": true,
+  "files.trimFinalNewlines": true,
+  "files.trimTrailingWhitespace": true,
+  "editor.tabSize": 2,
+  "javascript.preferences.quoteStyle": "single",
+  "javascript.format.insertSpaceAfterConstructor": true,
+  "javascript.format.insertSpaceAfterCommaDelimiter": true,
+  "javascript.format.insertSpaceAfterFunctionKeywordForAnonymousFunctions": true,
+  "javascript.format.semicolons": "remove",
+  "javascript.suggest.completeFunctionCalls": true,
+  "javascript.suggest.completeJSDocs": true,
+  "javascript.suggest.autoImports": true,
+  "js/ts.implicitProjectConfig.checkJs": true,
+}

README.md

@@ -1,21 +1,32 @@
 # Native File System adapter (ponyfill)
 
-> This is an in-browser file system that follows [native-file-system](https://wicg.github.io/native-file-system/) and supports storing and retrieving files from various backends.
+What is this?
+
+This is file system that follows [native-file-system](https://wicg.github.io/native-file-system/) specification. Thanks to it we can have a unified way of handling data in all browser and even in NodeJS in a more secure way.
+
+At a high level what we're providing is several bits:
+
+1. A modernized version of `FileSystemFileHandle` and `FileSystemDirectoryHandle` interfaces.
+2. A modernized version of `FileSystemWritableFileStream` to truncate and write data.
+3. A way to not only use one location to read & write data to and from, but several other sources called adapters
 
 ### Adapters
 
-This polyfill/ponyfill ships with 5 filesystem backends:
+This polyfill/ponyfill ships with a few backends built in:
 
-* `native`: Stores files the `Native Sandboxed` file storage
+* `node`: Interact with filesystem using nodes `fs`
+* `native`: Stores files the `Native Sandboxed` file file system storage
 * `Sandbox`: Stores files into the Blinks `Sandboxed FileSystem` API.
 * `IndexedDB`: Stores files into the browser's `IndexedDB` object database.
 * `Memory`: Stores files in-memory. Thus, it is a temporary file store that clears when the user navigates away.
 * `Cache storage`: Stores files in cache storage like a request/response a-like.
 
+You can even load in your own underlying adapter and get the same set of API's
+
 The api is designed in such a way that it can work with or without the ponyfill if you choose to remove or add this.<br>
-It's not trying to interfear with the changing spec by using other properties that may conflict with the feature changes to the spec. A few none spec options are prefixed with a `_`
+It's not trying to interfere with the changing spec by using other properties that may conflict with the feature changes to the spec.
 
-( The current minium supported browser I have choosen to support is the ones that can handle import/export )<br>
+( The current minium supported browser I have chosen to support is the ones that can handle import/export )<br>
 ( Some parts are lazy loaded when needed )
 
 ### Using
@@ -32,34 +43,42 @@ import {
   getOriginPrivateDirectory
 } from 'https://cdn.jsdelivr.net/gh/jimmywarting/native-file-system-adapter/src/es6.js'
 
-
 // the getOriginPrivateDirectory is a legacy name that
 // native filesystem added, have not bother to change it
 
-getOriginPrivateDirectory() // same as calling navigator.storage.getDirectory()
-// Blink's good old sandboxed file system API, can choose between persistent and temporary 
-getOriginPrivateDirectory(import('../src/adapters/sandbox.js'))
-getOriginPrivateDirectory(import('../src/adapters/memory.js'))
-getOriginPrivateDirectory(import('../src/adapters/indexeddb.js'))
-getOriginPrivateDirectory(import('../src/adapters/cache.js'))
-getOriginPrivateDirectory(import('../src/adapters/node.js'), './starting-path')
+// same as calling navigator.storage.getDirectory()
+handle = await getOriginPrivateDirectory()
+// A write only adapter to save files to the disk
+handle = await getOriginPrivateDirectory(import('../src/adapters/downloader.js'))
+// Blinks old sandboxed api
+handle = await getOriginPrivateDirectory(import('../src/adapters/sandbox.js'))
+// fast in-memory file system
+handle = await getOriginPrivateDirectory(import('../src/adapters/memory.js'))
+// Using indexDB
+handle = await getOriginPrivateDirectory(import('../src/adapters/indexeddb.js'))
+// Store things in the new Cache API as request/responses (bad at mutating data)
+handle = await getOriginPrivateDirectory(import('../src/adapters/cache.js'))
+
+// Node only variant:
+handle = await getOriginPrivateDirectory(import('native-file-system-adapter/src/adapters/memory.js'))
+handle = await getOriginPrivateDirectory(import('native-file-system-adapter/src/adapters/node.js'), './starting-path')
+
+
 
 // The polyfilled (file input) version will turn into a memory adapter
-// You will have readwrite permission on the memory adapter,
+// You will have read & write permission on the memory adapter,
 // you might want to transfer (copy) the handle to another adapter
 showOpenFilePicker({_preferPolyfill: boolean, ...sameOpts}).then(fileHandle => {})
 showDirectoryPicker({_preferPolyfill: boolean, ...sameOpts}).then(directoryHandle => {})
 
 // Supports drag and drop also
-ondrop = evt => {
+window.ondrop = evt => {
   evt.preventDefault()
-  getOriginPrivateDirectory(evt.dataTransfer).then(directoryHandle => {
-    // This is kind of a hybrid memory & sandboxed (Entry api) adapter
-    // it works together with old Entry API rather then transferring all of it to a memory adapter 
-    // This would allow you to monitor file changes by calling getFile()
-    // and compare the last modified date or file size
-    // You will have read access but, requesting write permission will reject.
-  })
+  for (let item of evt.dataTransfer.items) {
+    item.getAsFileSystemHandle(handle => {
+      console.log(handle)
+    })
+  }
 }
 
 // request user to select a file
@@ -73,10 +92,11 @@ const fileHandle = await showOpenFilePicker({
 // returns a File Instance
 const file = await fileHandle.getFile()
 
-// copy the file over to a another adapter
-const rootHandle = await getOriginPrivateDirectory() // same as navigator.store.getDirectory()
+// copy the file over to a another place
+const rootHandle = await getOriginPrivateDirectory()
 const fileHandle = await rootHandle.getFileHandle(file.name, { create: true })
 await fileHandle.write(file)
+fileHandle.close()
 
 // save/download a file
 const fileHandle = await showSaveFilePicker({
@@ -90,7 +110,7 @@ const fileHandle = await showSaveFilePicker({
   excludeAcceptAllOption: false // default
 })
 
-// Look at what extension they chosed
+// Look at what extension they chosen
 const extensionChosen = fileHandle.name.split('.').pop()
 
 const blob = {
@@ -100,7 +120,7 @@ const blob = {
 }[extensionChosen]
 
 await blob.stream().pipeTo(fileHandle.getWriter())
-// or 
+// or
 var writer = fileHandle.getWriter()
 writer.write(blob)
 writer.close()
@@ -113,7 +133,7 @@ Will get to it at some point in the feature
 
 Saving/downloading a file borrowing some of ideas from [StreamSaver.js](https://github.com/jimmywarting/StreamSaver.js).
 The difference is:
- - Using service worker is optional choice with this adapter. 🤷‍
+ - Using service worker is optional choice with this adapter.
  - It dose not rely on some man-in-the-middle or external hosted service worker.
  - If you want to stream large data to the disk directly instead of taking up much RAM you need to set up a service worker yourself.<br>(note that it requires https - but again worker is optional)
  - You don't have to handle web-streams-polyfills it's lazy loaded when needed when you need that writable stream. 😴
@@ -126,17 +146,12 @@ navigator.serviceWorker.register('sw.js')
 
 Without service worker you are going to write all data to the memory and download it once it closes.
 
-Seeking and truncating won't do anything. You should be writing all data in sequental order when using the polyfilled version.
-
------
-
-If you have chosen to `open-directory` when the polyfilled version is in use (`input[webkitdirectory]`)
-than you can't get any write access to it. So unless you are using chanary with experimental flags or enabled the [Origin Trials](https://github.com/GoogleChrome/OriginTrials/blob/gh-pages/developer-guide.md) for beta testing on your origin, then you better use `save-file` instead to be safe. It's also possible to query/request permission.
+Seeking and truncating won't do anything. You should be writing all data in sequential order when using the polyfilled version.
 
 ### Testing
 
-start up a server and open `/examples/test.html` in your browser.
-
+- start up a server and open `/examples/test.html` in your browser.
+- for node: `npm i && npm run test`
 
 ### Resources
 

example/sw.js

@@ -5,23 +5,34 @@ const ABORT = 1
 const CLOSE = 2
 const PING = 3
 
+/** @implements {UnderlyingSource} */
 class MessagePortSource {
+
+  /** @type {ReadableStreamController<any>} controller */
+  controller
+
+  /** @param {MessagePort} port */
   constructor (port) {
     this.port = port;
     this.port.onmessage = evt => this.onMessage(evt.data)
   }
+
+  /**
+   * @param {ReadableStreamController<any>} controller
+   */
   start (controller) {
     this.controller = controller
   }
-  pull () {
-    this.port.postMessage({ type: PULL })
-  }
+
+  /** @param {Error} reason */
   cancel (reason) {
-    // Firefox can notifiy a cancel event, chrome can't
+    // Firefox can notify a cancel event, chrome can't
     // https://bugs.chromium.org/p/chromium/issues/detail?id=638494
     this.port.postMessage({ type: ERROR, reason: reason.message })
     this.port.close()
   }
+
+  /** @param {{ type: number; chunk: Uint8Array; reason: any; }} message */
   onMessage (message) {
     // enqueue() will call pull() if needed when there's no backpressure
     if (message.type === WRITE) this.controller.enqueue(message.chunk)

example/test.html

@@ -49,7 +49,7 @@
       // scope: './'
     })
     </script>
-    <script type=module src="./test.js"></script>
+    <script type="module" src="./test.js"></script>
     <table id="table">
       <caption>Browser storage</caption>
       <thead><tr>
@@ -135,13 +135,15 @@
         <tr>
           <td width="1">
             <center>Drag and drop</center><br>
-            The DataTransfer are very similar to Blinks sandboxed filesystem.
-            so it would be easy to just convert the event to a FileSystemDirectoryHandle
-            and use the sandbox adapter on it.
+            The DataTransfer have implemented <code>DataTransferItem.prototype.getAsFileSystemHandle()</code>
+            That lets you convert a item into a filesystem handle. This is polyfilled for you.
             <pre style="background: #fff; box-sizing: border-box; color: #68615e; display: block; height: 100%; overflow-x: auto; padding: 0.5em;"><code style="height: 100%;">elm.ondragover = <span class="hljs-function"><span style="color: #df5320;">evt</span> =&gt;</span> evt.preventDefault()
-elm.ondrop = <span class="hljs-function"><span style="color: #df5320;">evt</span> =&gt;</span> {
+elm.ondrop = <span class="hljs-function"><span style="color: #df5320;">async evt</span> =&gt;</span> {
   evt.preventDefault()
-  getOriginPrivateDirectory(evt.dataTransfer)
+  for (const dataTransferItem of dataTransfer.items) {
+    const handle = await dataTransferItem.getAsFileSystemHandle()
+    console.log(handle.kind)
+  }
 }</code></pre>
           </td>
           <td>Drop anywhere<br>on page</td>