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Laraflow Workflow Package

Laraflow is a standard workflow package for Laravel Eloquent objects. You can define your steps, the transition between the them, callbacks, and validators.

Installation (via composer)

You can install the package via composer. The package require Laravel 5.5 or higher

composer require msnisha/Laraflow

You need to crate the necessary table for the historical data:

php artisan migrate

After Laravel 5.5 you don't need to manually add the service provider to the config/app.php.

Configuration array

You need a configuration array before you use the Laraflow workflow. For example:

[
    'property_path' => 'last_step',
    'steps' => [
        [
            'text' => 'Open',
            'extra' => []
        ],
        [
            'text' => 'In Progress',
            'extra' => []
        ],
        [
            'text' => 'Resolved',
            'extra' => []
        ],
        [
            'text' => 'Reopen',
            'extra' => []
        ],
        [
            'text' => 'Closed',
            'extra' => []
        ],
    ],
    'transitions' => [
        [
            'from' =>  0,
            'to' => 1,
            'text' => 'Start Progress',
            'extra' => [],
            'callbacks' => [
                'pre' => [
                    'App\\TestPreCallback'
                ],
                'post' => [
                    'App\\TestPostCallback'
                ]
            ],
            'validators' => [
                [
                    'title' => 'numeric',
                    'assignee_id' => 'required'
                ]
            ]
        ],
        [
            'from' => 1,
            'to' => 0,
            'text' => 'Stop Progress',
            'extra' => [],
            'callbacks' => [
                'pre' => [],
                'post' => []
            ],
            'validators' => []
        ],
        [
            'from' => 1,
            'to' =>  2,
            'text' => 'Resolve Issue',
            'extra' => [],
            'callbacks' => [
                'pre' => [],
                'post' => []
            ],
            'validators' => []
        ],
        [
            'from' => 2,
            'to' =>  3,
            'text' => 'Reopen Issue',
            'extra' => [],
            'callbacks' => [
                'pre' => [],
                'post' => []
            ],
            'validators' => []
        ],
        [
            'from' => 3,
            'to' =>  2,
            'text' => 'Resolve Issue',
            'extra' => [
                'fromPort' => 'R',
                'toPort' => 'R',
                'points' => []
            ],
            'callbacks' => [
                'pre' => [],
                'post' => []
            ],
            'validators' => []
        ],
        [
            'from' => 1,
            'to' =>  4,
            'text' => 'Close Issue',
            'extra' => [],
            'callbacks' => [
                'pre' => [],
                'post' => []
            ],
            'validators' => []
        ],
        [
            'from' => 3,
            'to' =>  4,
            'text' => 'Close Issue',
            'extra' => [],
            'callbacks' => [
                'pre' => [],
                'post' => []
            ],
            'validators' => []
        ],
    ],

This configuration contains a sample workflow. Every step has a text which you can use to display them. All of the other necessary attributes has to be add to the extra array.
The property_path contains the column name in the table which stores the actual step of the record.

Usage

Step 1

First you need to add a new column to your Eloquent model table for example called: last_step/status or whatever you want.

 $table->string('last_state');

In your config file property_path attribute has to be the same value than the column name.

Step 2

You have to add the Flowable trait to your Eloquent model to use the workflow.

use szana8\Laraflow\Traits\Flowable;

class SampleClass extends Model {

    use Flowable;
    

Step 3

Than you have to add a function to your eloquent model called getLaraflowStates() .
This function has to return the array of the configuration!

Step 4

If you want to change the status of the Eloquent object you can use the

$object->transiton($new_status);
$object->save();

method which comes from the Flowable trait. The $new_status parameter is the value of the key attribute which comes from the getPossibleTransitions() function.

Events

You can listen to the 'global' events which fires in every status changes.

LaraflowEvents::PRE_TRANSITION
LaraflowEvents::POST_TRANSITION
LaraflowEvents::CAN_TRANSITION

The PRE_TRANSITION fires before the status change, the POST_TRANSITION fires after. The CAN_TRANSITION fires when the package checks the transition is possible from the actual step. You can define callback(s) which will be call from the specified transition.

Validators

The package comes with a default validator class, which use the Laravel Validator class. You can add validation rules to the transitions, so the package can checks the Eloquent object attributes with the given rules before the transition. If the validation fails throws a LaraflowValidatorException exception with the error message(s) array.

You can define your own validator if you create a class which implements the LaraflowValidatorInterface.

Credits

This library has been highly inspired by https://github.com/winzou/state-machine.

License

The package is open-sourced software licensed under the MIT license.