Tobias Reich
10 years ago
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### About
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The plugin-system of Lychee allows you to execute scripts, when a certain action fires. Plugins are hooks, which are injected directly into Lychee. They only affect the back-end and can't modify the front-end.
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### Use Cases
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* Automatically watermark photos on upload
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* Automatically set albums public
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* Write metadata changes back to the original photo
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* …
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### How to create a plugin
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1. Create a folder in `plugins/`
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2. Create an `index.php` within the new folder and with the following content:
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```php
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<?php
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###
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# @name ExamplePlugin
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# @author Tobias Reich
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# @copyright 2014 by Tobias Reich
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###
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if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');
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class ExamplePlugin implements SplObserver {
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private $database = null;
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private $settings = null;
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public function __construct($database, $settings) {
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# These params are passed to your plugin from Lychee
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# Save them to access the database and settings of Lychee
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$this->database = $database;
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$this->settings = $settings;
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# Add more code here if wanted
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# __construct() will be called every time Lychee gets called
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# Make sure this part is performant
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return true;
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}
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public function update(\SplSubject $subject) {
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# Check if the called hook is the hook you are waiting for
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# A list of all hooks is available online
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if ($subject->action!=='Photo::add:before') return false;
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# Do something when Photo::add:before gets called
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# $this->database => The database of Lychee
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# $this->settings => The settings of Lychee
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# $subject->args => Params passed to the original function
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return true;
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}
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}
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# Register your plugin
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$plugins->attach(new ExamplePlugin($database, $settings));
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```
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3. Add the plugin-path to the database of Lychee
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Select the table `lychee_settings` and edit the value of `plugins` to the path of your plugin. The path must be relative from the `plugins/`-folder: `ExamplePlugin/index.php`.
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Divide multiple plugins with commas: `Plugin01/index.php,Plugin02/index.php`.
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### Available hooks
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##### About :before and :after
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Hooks named `:before` will be executed prior to the original function.
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Hooks named `:after` will be executed after the original function.
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`Album::add:before` will be called when the user creates a new album in Lychee. The album doesn't exist at this moment.
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`Album::add:after` will be called after the album has been created.
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##### Album
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These hooks are called from `php/modules/Album.php`.
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| Name | Description |
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|:-----------|:------------|:------------|
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| Album::add:before | User adds album |
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| Album::add:after | |
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| Album::get:before | User opens album |
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| Album::get:after | |
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| Album::getAll:before | User opens album overview |
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| Album::getAll:after | |
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| Album::getArchive:before | User downloads album |
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| Album::getArchive:after | |
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| Album::setTitle:before | User renames album |
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| Album::setTitle:after | |
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| Album::setDescription:before | User sets description |
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| Album::setDescription:after | |
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| Album::getPublic:before | User makes album public or private |
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| Album::getPublic:after | |
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| Album::setPassword:before | User sets password |
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| Album::setPassword:after | |
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| Album::checkPassword:before | Lychee checks if password is correct |
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| Album::checkPassword:after | |
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| Album::delete:before | User deletes album |
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| Album::delete:after | |
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##### Photo
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These hooks are called from `php/modules/Photo.php`.
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| Name | Description |
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|:-----------|:------------|:------------|
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| Photo::add:before | User uploads photos |
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| Photo::add:after | |
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| Photo::createThumb:before | Lychee creates thumbs |
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| Photo::createThumb:after | |
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| Photo::adjustFile:before | Lychee adjusts files |
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| Photo::adjustFile:after | |
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| Photo::get:before | User opens photo |
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| Photo::get:after | |
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| Photo::getInfo:before | Lychee reads the metadata of an image |
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| Photo::getInfo:after | |
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| Photo::getArchive:before | User downloads photo |
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| Photo::getArchive:after | |
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| Photo::setTitle:before | User renames photo |
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| Photo::setTitle:after | |
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| Photo::setDescription:before | User sets description |
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| Photo::setDescription:after | |
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| Photo::setStar:before | User stars photo |
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| Photo::setStar:after | |
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| Photo::getPublic:before | Lychee checks if photo is public |
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| Photo::getPublic:after | |
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| Photo::setPublic:before | User shares photo |
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| Photo::setPublic:after | |
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| Photo::setAlbum:before | User moves photo to album |
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| Photo::setAlbum:after | |
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| Photo::setTags:before | User sets tags |
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| Photo::setTags:after | |
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| Photo::delete:before | User deletes photo |
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| Photo::delete:after | |
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##### Session
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These hooks are called from `php/modules/Session.php`.
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| Name | Description |
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|:-----------|:------------|:------------|
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| Session::init:before | Someone opens Lychee |
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| Session::init:after | |
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| Session::login:before | Someone logs in |
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| Session::login:after | |
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| Session::logout:before | User logs out |
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| Session::logout:after | |
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