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Example code of samshal/acl

Informations about the package acl

Acl Build Status Scrutinizer Code Quality

Samshal\Acl adds a role based permission system for user authentication. In general, it provides a lightweight access control list for privileges and permission management.

Why you might need it

Access Control Lists allow an application to control access to its areas, they provide a flexible interface for creating Permissions, Roles, Resources and assigning the created permissions on roles.

This component is an implementation of an ACL, it makes it easy for you to get up and running with user authorization.

Class Features

Resources are objects which acts in accordance to the permissions defined on them by the ACLs. Roles are objects that requests access to resources and can be allowed or denied by the ACL layers. Permissions are just rules defined on Resources.

Metrics of master branch

Package Metrics

License

This software is distributed under the MIT license. Please read LICENSE for information on the software availability and distribution.

Installation

Samshal\Acl is available via Composer/Packagist, so just add this line to your composer.json file:

or

Getting Started

Creating an ACL

Creating an ACL component is as easy as instantiating Samshal\Acl. The constructor currently accepts no arguments. An example of instantiation is:

Adding objects (Roles, Permissions and Resources) to the ACL.

The ACL provides an add method for adding new objects generically. In other words, to add a new role to the Acl, just pass in a Role Object to the ACLsadd` method. You can also do the same for Resources and Permissions.

A Role Object is an instance of the \Samshal\Acl\Role\DefaultRole object or more generally, an object that implements the \Samshal\Acl\Role\RoleInterface and \Samshal\Acl\ObjectInterface contracts. It accepts the name of the Role to create as parameter and the description for the created role as optional second parameter.

Similarly Resource objects are instances of the \Samshal\Acl\Resource\DefaultResource object which also implements the \Samshal\Acl\Resource\ResourceInterface and \Samshal\Acl\ObjectInterface interfaces, Likewise for permissions, they must implement the \Samshal\Acl\Permission\PermissionInterface and the \Samshal\Acl\ObjectInterface contracts or be new instances of the \Samshal\Acl\Permission\DefaultPermission class.

Generally, Roles, Resources and Permissions are referred to as Objects. They must all implement the \Samshal\Acl\ObjectInterface contract.

Internally, the created objects are stored in Registries which are fully serializable. This makes it easy to transfer/get the objects from anywhere; a persistent storage, a database and anywhere else data can be stored/received. More on this later.

Samshal\Acl provides a more intuitive way to create objects. Instead of creating new objects everytime you need to add them to the registry, why not call a single method that can determine which kind of object you are trying to create and have it do it automatically? The ACL provides an addRole, addResource and addPermission methods for this purpose which all accepts string values as parameters. Example:

Cool right? The add methods (addRole, addResource, addPermission and add) are variadic, they can accept an unlimited number of arguments at a time. So we could even make our lives less more boring by doing this while adding the Roles

or this for the Permissions.

Setting Permissions.

The reason why this component exists is to set permissions on resources and grant/deny these permissions to roles. The snippet below gives an example of how to set these permissions.

Checking Permissions

To check the permission a role has on a certain resource, you can use a snippet similar to the following:

Keeping your ACL persistent and safe.

\Samshal\Acl stores objects including the permissions on objects in registries which are fully serializable. This means you can convert your entire acl into a string and store that in a database or session and make it exist infinitely until you are ready to destroy it or never use it again.

How-To
How to retrieve it

Other Interesting Features

Role - Role Inheritance

\Samshal\acl allows roles to inherit permissions from other roles. The Acl component has an inherits method that accepts a Role object as parameter. You can also pass in a string, but it must be the id of an already existent role object.

Automatically grant permissions on all resources.

You can also call a Permission object without any parameter. This grants the permission in question on all resources defined within the ACL on the Role in session.

Maintainer of this Library

This library is currently developed and maintained by Samuel Adeshina

ROAD MAP

Road Map draft in progress.

HOW TO CONTRIBUTE

Support follows PSR-2 PHP coding standards.

Please report any issue you find in the issues page. Pull requests are welcome.

All versions of acl with dependencies

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Requires php Version ^7.0
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