owncloud application developpment


owncloud application developpment

 

Write your first ownCloud App in 60 minutes ownCloud, Inc. 10 Foster Road Lexington, MA 02421 United States mail: infoowncloud.com phone: +1 (877) 394-2030 https://www.owncloud.com YOUR CLOUD, YOUR DATA, YOUR WAY! Page 1 of 2 Write your first ownCloud App in 60min ownCloud is a software that can be used to replace proprietary cloud services like Google Drive, Dropbox or box.net. Users can host an ownCloud installation on own hardware or at a provider that offers ownCloud hosting. ownCloud can also run on most basic webspaces that support PHP without the need for special configurations. ownCloud is suitable for home users and big organisations and is available under the AGPL license as free software. It is developed by an open and friendly worldwide community of develo- pers. Professional enterprise support and services around ownCloud is delivered by ownCloud Inc. Ehe core feature is to store, sync and share you files and documents and access them from all you devices cross platform. But ownCloud is more than just a modern file sync and share solution. ownCloud support an concept called ownCloud applications. An application is a plugin or extension that can run on top of ownC- loud and provide additional features and functionallities. Example for apps that are already part of ownCloud are the media player app, the calendar or the contacts app. ownCloud is a platform for HTML5 ap- plications and all kind of webservice that users want to host and run under own control. Why should you develop an app for ownCloud ? Everybody is welcome to join the ownC- loud core developer community to help to improve the core features and help to push ownCloud forward. But even if you don?t want to do this there are reason why you should consider to write an ownCloud application. Perhaps you are missing a feature and want to extend ownCloud to suport it. Perhaps you don?t want to rely on proprietary services like gmail to provide you with a web-mail interface, or you want your own link shortening service running on your own machine or you want your own application to manage your DVD collection. You can easily write your own ownCloud application to implement this features. Your ownCloud application can provide an HTML5 interface or an RESTfull API to provide you with the webservice you want. Another reason to write an own- Cloud application is to build a syncing and sharing backend for an existing applica- tion. Example are: ? You want to extend a photo manage- ment desktop application with the posibility to share photos with others. ? You want extend your game to store a shared high score list on a central place. ? You want to extend you notes appli- cation or RSS reader to sync data and status between different devices. Writing ownCloud applications is easy and fun. So please try it if you have an idea for a free service that should run on top of ownCloud. How difficult is it? Writing ownCloud applications is easy. You need some basic PHP and HTML knowledge to write your first ownCloud application. Depending on the typ of application you want to build, some JavaScript and SQL knowledge is also use- ful. ownCloud has a very open and friend- ly community so you can always get help from experts via mailinglists, IRC chat channels or the forum. What do I have to know? PHP You should know how to code some basic PHP and you need some basic understan- ding how the web and webservers work. The PHP syntax is similar to C or C++ and a lot of other languages so it should be easy to learn. ownCloud has a powerful framework to help you with thing like usermanagement or templating. HTML You need some basic HTML and CSS knowledge to develop the userinterface of your application. ownCloud provides you with some basic functionallity to create configuration dialogs or other basic user- interface elements. ownCloud is using jQuery so we suggest that you look into it if you want to create a rich HTML5 webin- terface as part of your application. SQL ownCloud has basic functionallity to read and write basic data to the database or to the filesystem. You need some SQL knowledge if you want to work with more complex data structures in your applica- tion. This is optional and depends on the type of application you want to create. ownCloud API The ownCloud core provides a stable public API for ownCloud application devel- opers. You should make yourself familiar with the basic calls that are required to be used like registering you application, loading and saving of configuration and other basic functionallities. YOUR CLOUD, YOUR DATA, YOUR WAY! Page 2 of 2 How to start All the ownCloud code is located at gitori- ous.org [7] In the apps repository are a lot of application located that you can use to look into and learn how an ownCloud application is structured. [1] Before you start, please check if there already is a similar app you could contribute to. For the beginning we suggest to use the application template as a starting point for the development. [2] You can always ask questions on the mailinglists, forum or the chat channel. You find all the possi- ble ways to contact the core team here: [3] The directory structure ownCloud applications have to be structured in a specific way to work. The recommended directory structure is: ? ajax ? a directory for the ajax call cont- roler files if needed in your application. ? appinfo ? The info.xml and the app.php are located in this folder. The most im- portant file is app.php. ownCloud will call this file everytime it runs, so this is the place where you can register your navigation entries or connect signals and slots. You can also put a database. xml into this folder if needed. ? css ? The addtional stylesheets of this application are located here. ? img ? All the needed images should be located in this folder. ? js ? You can put you Javascript files here. The JS libraries we use are jQuery and Torch. You can add scripts to your pages using OCP\Util::addscript. Scripts can be added this way in either appinfo/app.php or in your app?s individual PHP scripts. ? l10n ? Put your translations into this folder if you want to support more than english. As soon as the translation detects a l10n folder it knows that this program is translatable. You find more information about the translation system here [6] ? lib ? Please put you application logic, classes and functions into php files in this folder. ownCloud uses the MVC principle. The libraries represent the model. Basically all data should be handled here so the php files the user calls only interact with the library. If you have a look at the lib folder in, for example the contacts app, you will see three files: addressbook. php, hooks.php and connector_sabre.php. addressbook.php contains all methods that are required for handling addres- ses. We mostly use the classes as namespaces and write static functions, ??real? OOP with dynamicaly instansia- ted objects is only used if it is useful. ? templates ? Templates for your user- interface should go into this folder. ownCloud has its own template sys- tem. The templates are php files that are included by OC_Template. Having a look at an example file should show you everything you need to know. The variables are assigned by using $tmpl- >assign(?name?, ?value?);, You find more information here [4] ? The API ? You find the complete API documentation here [4] The most important calls are: OCP\App::addNavigationEntry This adds an navigation of your applica- tion to the main navigation on the left. You usually call this in app.php OCP\App::setActiveNavigationEntry This calls activated a navigation entry. You do this when inside your application OCP\App::registerPersonal You can use this call to register an perso- nal settings section on the user settings page. OCP\App::registerAdmin You can use this call to register an admin settings section on the main admin page. OCP\Config::getUserValue Use this call to to read a setting for the currently logged in user from the settings store. OCP\Config::setUserValue Use this call to to write a setting for the currently logged in user to the settings store. OCP\DB::prepare Prepare an SQL statement for execution. OCP\User::isLoggedIn Check if a user is currently logged in. OCP\Util::addscript Load an additional JS script OCP\Util::addStyle Load an additional CSS style [1] https://github.com/owncloud/apps [2] https://github.com/owncloud/apps/ tree/master/appframework [3] http://owncloud.org/contact/ [4] http://owncloud.org/dev/apps/ getting-started/ [5] http://api.owncloud.org [6] http://owncloud.org/dev/translation/ [7] https://github.com/owncloud ownCloud, Inc. 10 Foster Road Lexington, MA 02421 United States mail: infoowncloud.com phone: +1 (877) 394-2030 https://www.owncloud.com

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