169 lines
5.3 KiB
Markdown
169 lines
5.3 KiB
Markdown
Developer guide
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===============
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Architecture
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------------
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![Architecture diagram][1]
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StackEdit uses [RequireJS][2] for asynchronous module definition ([AMD][3]).
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----------
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### core
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The `core` module is responsible for:
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- creating the [UI Layout][4],
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- creating the [PageDown][5] editor,
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- loading/saving the settings,
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- running periodic tasks,
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- detecting the user activity,
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- checking the offline status.
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##### Attributes:
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- `isOffline`: indicates the offline status of the application.
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##### Methods:
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- `core.onReady(callback)`: sets a callback to be called when all modules have been loaded and the DOM is ready.
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> **NOTE:** This is preferred over [jQuery's `.ready()`][6] because it ensures that all AMD modules are loaded by [RequireJS][2]).
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- `runPeriodically(callback)`: sets a callback to be called every second.
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> **NOTE:** The callback will not run if the user is inactive or in StackEdit Viewer. User is considered inactive after 5 minutes of inactivity (mouse or keyboard).
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- `setOffline()`: can be called by any other modules when a network timeout occurs for instance.
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> **NOTE:** the offline status is also set by detecting the window `offline` event. `isOffline` is automatically set to `false` when the network is recovered.
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- `initEditor(fileDesc)`: creates or refreshes the [PageDown][7] editor with a given [`FileDescriptor`][8] object.
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----------
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### fileMgr
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The `fileMgr` module is responsible for:
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- creating and deleting local files
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- switching from one file to another
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#### FileDescriptor
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The `FileDescriptor` class represents a local file. A `FileDescriptor` object has the following properties:
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- `fileIndex`: the unique string index of the file in the file system
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- `title`: the title of the document
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- `content`: the content of the document
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- `syncLocations`: a map containing all the associated [`syncAttributes`][9] objects with their `syncIndex` as a key
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- `publishLocations`: a map containing all the associated [`publishAttributes`][10] objects with their `publishIndex` as a key
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And the following methods:
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- `addSyncLocation(syncAttributes)`: associates a [`syncAttributes`][11] object with the file
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- `removeSyncLocation(syncAttributes)`: unassociates a [`syncAttributes`][12] object with the file
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- `addPublishLocation(publishAttributes)`: associates a [`publishAttributes`][13] object with the file
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- `removePublishLocation(publishAttributes)`: unassociates a [`publishAttributes`][14] object with the file
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#### fileSystem
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The `fileSystem` module is a map containing all the [`FileDescriptor`][15] objects with their `fileIndex` as a key
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----------
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### synchronizer
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The `synchronizer` module is responsible for:
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- creating a new local file from a sync location (import)
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- creating a new sync location from a local file (export)
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- running 2 ways synchronization (upload and download) for all sync locations
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#### synchronizer's providers
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A [`provider`][16] module can be associated with the `synchronizer` module if it implements the following functions:
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- `importFiles()`: downloads one or multiple files and create local files associated with the sync locations
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- `exportFile()`: uploads a local file to a new sync location
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- `syncDown()`: performs a download of all the changes operated on all sync locations
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- `syncUp()`: performs an upload of a change to a sync location
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#### syncAttributes
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A `syncAttributes` object is an object that describes a sync location. Attributes differ from one provider to another except for the following:
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- `syncIndex`: the unique string index of the publish location
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- `provider`: the [`provider`][17] module that handles the sync location
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----------
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### publisher
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The `publisher` module is responsible for:
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- creating new publish locations
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- updating existing publish locations
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#### publisher's providers
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A [`provider`][18] module can be associated with the `publisher` module if it implements the following functions:
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- `newPublishAttributes()`: returns a new [`publishAttributes`][19] object in order to create a new publish location
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- `publish()`: performs publishing of one publish location
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#### publishAttributes
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A `publishAttributes` object is an object that describes a publish location. Attributes differ from one provider to another except for the following:
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- `publishIndex`: the unique string index of the publish location
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- `provider`: the [`provider`][20] module that handles the publish location
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- `format`: the publishing format for the publish location. It can be:
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- `markdown` for Markdown format
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- `html` for HTML format
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- `template` for template format
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----------
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### provider
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> Written with [StackEdit](http://benweet.github.io/stackedit/).
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[1]: http://benweet.github.io/stackedit/doc/img/architecture.png "Architecture diagram"
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[2]: http://requirejs.org/ "RequireJS"
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[3]: http://en.wikipedia.org/wiki/Asynchronous_module_definition "Asynchronous module definition"
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[4]: http://layout.jquery-dev.net/ "UI Layout"
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[5]: https://code.google.com/p/pagedown/ "PageDown"
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[6]: http://api.jquery.com/ready/
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[7]: https://code.google.com/p/pagedown/ "PageDown"
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[8]: #filedescriptor
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[9]: #syncattributes
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[10]: #publishattributes
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[11]: #syncattributes
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[12]: #syncattributes
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[13]: #publishattributes
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[14]: #publishattributes
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[15]: #filedescriptor
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[16]: #provider
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[17]: #provider
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[18]: #provider
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[19]: #publishattributes
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[20]: #provider |