lychee/docs/Plugins.md

About

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.

Use Cases

• Automatically watermark photos on upload
• Automatically set albums public
• Write metadata changes back to the original photo
• …

How to create a plugin

1. Create a folder in plugins/
2. Create an index.php within the new folder and with the following content:

<?php

###
# @name			ExamplePlugin
# @author		Tobias Reich
# @copyright	2014 by Tobias Reich
###

if (!defined('LYCHEE')) exit('Error: Direct access is not allowed!');

class ExamplePlugin implements SplObserver {

	private $database = null;
	private $settings = null;

	public function __construct($database, $settings) {

		# These params are passed to your plugin from Lychee
		# Save them to access the database and settings of Lychee
		$this->database = $database;
		$this->settings = $settings;
		
		# Add more code here if wanted
		# __construct() will be called every time Lychee gets called
		# Make sure this part is performant

		return true;

	}

	public function update(\SplSubject $subject) {

		# Check if the called hook is the hook you are waiting for
		# A list of all hooks is available online
		if ($subject->action!=='Photo::add:before') return false;

		# Do something when Photo::add:before gets called
		# $this->database => The database of Lychee
		# $this->settings => The settings of Lychee
		# $subject->args => Params passed to the original function
		
		return true;
		
	}

}

# Register your plugin
$plugins->attach(new ExamplePlugin($database, $settings));

1. Add the plugin-path to the database of Lychee

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.

Divide multiple plugins with semicolons: Plugin01/index.php;Plugin02/index.php.

Available hooks

About :before and :after

Hooks named :before will be executed prior to the original function. Hooks named :after will be executed after the original function.

Album::add:before will be called when the user creates a new album in Lychee. The album doesn't exist at this moment. Album::add:after will be called after the album has been created.

Album

These hooks are called from php/modules/Album.php.

| Name | Description | |:-----------|:------------|:------------| | Album::add:before | User adds album | | Album::add:after | | | Album::get:before | User opens album | | Album::get:after | | | Album::getAll:before | User opens album overview | | Album::getAll:after | | | Album::getArchive:before | User downloads album | | Album::getArchive:after | | | Album::setTitle:before | User renames album | | Album::setTitle:after | | | Album::setDescription:before | User sets description | | Album::setDescription:after | | | Album::getPublic:before | User makes album public or private | | Album::getPublic:after | | | Album::setPassword:before | User sets password | | Album::setPassword:after | | | Album::checkPassword:before | Lychee checks if password is correct | | Album::checkPassword:after | | | Album::delete:before | User deletes album | | Album::delete:after | |

Photo

These hooks are called from php/modules/Photo.php.

| Name | Description | |:-----------|:------------|:------------| | Photo::add:before | User uploads photos | | Photo::add:after | | | Photo::createThumb:before | Lychee creates thumbs | | Photo::createThumb:after | | | Photo::adjustFile:before | Lychee adjusts files | | Photo::adjustFile:after | | | Photo::get:before | User opens photo | | Photo::get:after | | | Photo::getInfo:before | Lychee reads the metadata of an image | | Photo::getInfo:after | | | Photo::getArchive:before | User downloads photo | | Photo::getArchive:after | | | Photo::setTitle:before | User renames photo | | Photo::setTitle:after | | | Photo::setDescription:before | User sets description | | Photo::setDescription:after | | | Photo::setStar:before | User stars photo | | Photo::setStar:after | | | Photo::getPublic:before | Lychee checks if photo is public | | Photo::getPublic:after | | | Photo::setPublic:before | User shares photo | | Photo::setPublic:after | | | Photo::setAlbum:before | User moves photo to album | | Photo::setAlbum:after | | | Photo::setTags:before | User sets tags | | Photo::setTags:after | | | Photo::delete:before | User deletes photo | | Photo::delete:after | |

Session

These hooks are called from php/modules/Session.php.

| Name | Description | |:-----------|:------------|:------------| | Session::init:before | Someone opens Lychee | | Session::init:after | | | Session::login:before | Someone logs in | | Session::login:after | | | Session::logout:before | User logs out | | Session::logout:after | |