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README.md

#phonegap-plugin-contentsync Build Status bitHound Score

Download and cache remotely hosted content.

Installation

phonegap plugin add https://github.com/phonegap/phonegap-plugin-contentsync

Supported Platforms

  • Android
  • iOS
  • WP8

Quick Example

var sync = ContentSync.sync({ src: 'http://myserver/assets/movie-1', id: 'movie-1' });

sync.on('progress', function(data) {
    // data.progress
});

sync.on('complete', function(data) {
    // data.localPath
});

sync.on('error', function(e) {
    // e.message
});

sync.on('cancel', function() {
    // triggered if event is cancelled
});

API

ContentSync.sync(options)

Parameter Description
options.src String URL to the remotely hosted content.
options.id String Unique identifer to reference the cached content.
options.type String (Optional) Defines the copy strategy for the cached content.
The type replace is the default behaviour that deletes the old content and caches the new content.
The type merge will add the new content to the existing content. This will replace existing files, add new files, but never delete files.
The type local returns the full path to the cached content if it exists or downloads it from options.src if it doesn't. options.src is not required if cached content actually exists.
options.headers Object (Optional) Set of headers to use when requesting the remote content from options.src.
options.copyCordovaAssets Boolean (Optional) Copies cordova.js, cordova_plugins.js and plugins/ to sync'd folder. This operation happens after the source content has been cached, so it will override any existing Cordova assets. Default is false.

Returns

  • Instance of ContentSync.

Example

var sync = ContentSync.sync({ src: 'http://myserver/app/1', id: 'app-1' });

sync.on(event, callback)

Parameter Description
event String Name of the event to listen to. See below for all the event names.
callback Function is called when the event is triggered.

sync.on('progress', callback)

The event progress will be triggered on each update as the native platform downloads and caches the content.

Callback Parameter Description
data.progress Integer Progress percentage between 0 - 100. The progress includes all actions required to cache the remote content locally. This is different on each platform, but often includes requesting, downloading, and extracting the cached content along with any system cleanup tasks.
data.status Integer Enumeration of PROGRESS_STATE to describe the current progress state.

Example

sync.on('progress', function(data) {
    // data.progress
    // data.status
});

sync.on('complete', callback)

The event complete will be triggered when the content has been successfully cached onto the device.

Callback Parameter Description
data.localPath String The file path to the cached content. The file path will be different on each platform and may be relative or absolute. However, it is guaraneteed to be a compatible reference in the browser.
data.cached Boolean Set to true if options.type is set to local and cached content exists. Set to false otherwise.

Example

sync.on('complete', function(data) {
    // data.localPath
    // data.cached
});

sync.on('error', callback)

The event error will trigger when an internal error occurs and the cache is aborted.

Callback Parameter Description
e Error Standard JavaScript error object that describes the error.

Example

sync.on('error', function(e) {
    // e.message
});

sync.on('cancel', callback)

The event cancel will trigger when sync.cancel is called.

Callback Parameter Description
no parameters

Example

sync.on('cancel', function() {
    // user cancelled the sync operation
});

sync.cancel()

Cancels the content sync operation and triggers the cancel callback.

var sync = ContentSync.sync({ src: 'http://myserver/app/1', id: 'app-1' });

sync.on('cancel', function() {
    console.log('content sync was cancelled');
});

sync.cancel();

ContentSync.PROGRESS_STATE

An enumeration that describes the current progress state. The mapped String values can be customized for the user's app.

Integer Description
0 STOPPED
1 DOWNLOADING
2 EXTRACTING
3 COMPLETE

ContentSync.unzip || Zip.unzip - ContentSync.download

If you are using the Chromium Zip plugin this plugin won't work for you on iOS. However, it supports the same interface so you don't have to install both.

zip.unzip(<source zip>, <destination dir>, <callback>, [<progressCallback>]);

There is also an extra convenience method that can be used to download an archive

ContentSync.download(url, headers, cb)

The progress events described above also apply for these methods.

Example

ContentSync.PROGRESS_STATE[1] = 'Downloading the media content...';

Native Requirements

  • There should be no dependency on the existing File or FileTransfer plugins.
  • The native cached file path should be uniquely identifiable with the id parameter. This will allow the Content Sync plugin to lookup the file path at a later time using the id parameter.
  • The first version of the plugin assumes that all cached content is downloaded as a compressed ZIP. The native implementation must properly extract content and clean up any temporary files, such as the downloaded zip.
  • The locally compiled Cordova web assets should be copied to the cached content. This includes cordova.js, cordova_plugins.js, and plugins/**/*.
  • Multiple syncs should be supported at the same time.

Running Tests

npm test

Contributing

Editor Config

The project uses .editorconfig to define the coding style of each file. We recommend that you install the Editor Config extension for your preferred IDE.

JSHint

The project uses .jshint to define the JavaScript coding conventions. Most editors now have a JSHint add-on to provide on-save or on-edit linting.

Install JSHint for vim

  1. Install jshint.
  2. Install jshint.vim.

Install JSHint for Sublime

  1. Install Package Control
  2. Restart Sublime
  3. Type CMD+SHIFT+P
  4. Type Install Package
  5. Type JSHint Gutter
  6. Sublime -> Preferences -> Package Settings -> JSHint Gutter
  7. Set lint_on_load and lint_on_save to true