How to add a custom action in the rule engine¶

Quick Overview¶

This cookbook is about a feature only provided in the Enterprise Edition.

This cookbook assumes that you already created a new bundle to add your custom rule. Let’s assume its namespace is Acme\CustomBundle.

Create a custom action¶

In this cookbook we are going to see how to add a custom action in the rule engine. For this example, the goal of this rule is to concatenate attributes name, price and total megapixels into the description field.

First let’s see how to create the action. You need to create an ActionApplier object that will contain the logic:

#/src/Acme/Bundle/CustomBundle/ActionApplier/PatternActionApplier.php
<?php

namespace Acme\Bundle\CustomBundle\ActionApplier;

use Akeneo\Tool\Bundle\RuleEngineBundle\Model\ActionInterface;
use Acme\Bundle\CustomBundle\Model\ProductPatternAction;
use Akeneo\Tool\Component\RuleEngine\ActionApplier\ActionApplierInterface;
use Akeneo\Tool\Component\StorageUtils\Updater\PropertySetterInterface;

class PatternActionApplier implements ActionApplierInterface
{
    /** @var PropertySetterInterface */
    protected $propertySetter;

    /**
     * @param PropertySetterInterface $propertySetter
     */
    public function __construct(PropertySetterInterface $propertySetter)
    {
        $this->propertySetter = $propertySetter;
    }

    /**
     * {@inheritdoc}
     */
    public function applyAction(ActionInterface $action, array $products = [])
    {
        $attributes = $action->getAttributes();
        $pattern    = $action->getPattern();

        foreach ($products as $product) {
            $result = $pattern;

            foreach ($attributes as $attributeCode) {
                $value = $product->getValue($attributeCode);

                $content = null === $value ? '' : (string) $value;
                $result = str_replace('%%' . $attributeCode . '%%', $content, $result);
            }

            $this->propertySetter->setData(
                $product,
                $action->getField(),
                $result,
                $action->getOptions()
            );
        }
    }

    /**
     * {@inheritdoc}
     */
    public function supports(ActionInterface $action)
    {
        return $action instanceof ProductPatternAction;
    }
}

Then we need to create the object that will handle the data.

Tip

Implementing the FieldImpactActionInterface will allow the attribute to be flagged as smart in the UI.

#/src/Acme/Bundle/CustomBundle/Model/ProductPatternAction.php
<?php

namespace Acme\Bundle\CustomBundle\Model;

use Akeneo\Tool\Bundle\RuleEngineBundle\Model\ActionInterface;
use Akeneo\Pim\Automation\RuleEngine\Component\Model\FieldImpactActionInterface;

class ProductPatternAction implements ActionInterface, FieldImpactActionInterface
{
    const ACTION_TYPE = 'pattern';

    /** @var string */
    protected $field;

    /** @var array */
    protected $attributes = [];

    /** @var string */
    protected $pattern;

    /** @var array */
    protected $options = [];

    /**
     * {@inheritdoc}
     */
    public function getField()
    {
        return $this->field;
    }

    /**
     * {@inheritdoc}
     */
    public function setField($field)
    {
        $this->field = $field;
    }

    /**
     * {@inheritdoc}
     */
    public function getOptions()
    {
        return $this->options;
    }

    /**
     * {@inheritdoc}
     */
    public function setOptions(array $options = [])
    {
        $this->options = $options;
    }

    /**
     * @return array
     */
    public function getAttributes()
    {
        return $this->attributes;
    }

    /**
     * @return array
     */
    public function getPattern()
    {
        return $this->pattern;
    }

    /**
     * @param array $attributes
     */
    public function setAttributes(array $attributes = [])
    {
        $this->attributes = $attributes;
    }

    /**
     * @param string $pattern
     */
    public function setPattern($pattern)
    {
        $this->pattern = $pattern;
    }

    /**
     * {@inheritdoc}
     */
    public function getImpactedFields()
    {
        return [$this->getField()];
    }
}

We also need to create a denormalizer that will return our previous object that handles the data. It will convert the array into an object (needed for the import).

#/src/Acme/Bundle/CustomBundle/Denormalizer/ProductRule/PatternActionDenormalizer.php
<?php

namespace Acme\Bundle\CustomBundle\Denormalizer\ProductRule;

use Acme\Bundle\CustomBundle\Model\ProductPatternAction;
use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;

class PatternActionDenormalizer extends GetSetMethodNormalizer
{
    /**
     * {@inheritdoc}
     */
    public function denormalize($data, $class, $format = null, array $context = [])
    {
        return parent::denormalize($data, 'Acme\Bundle\CustomBundle\Model\ProductPatternAction');
    }

    /**
     * {@inheritdoc}
     */
    public function supportsDenormalization($data, $type, $format = null)
    {
        return isset($data['type']) && ProductPatternAction::ACTION_TYPE === $data['type'];
    }
}

For our example we need to create an ExistingAttributeValidator that will check if the attributes provided in the rule file exist. It will raise a violation and skip this item if not.

#/src/Acme/Bundle/CustomBundle/Validator/Constraints/ExistingAttributesValidator.php
<?php

namespace Acme\Bundle\CustomBundle\Validator\Constraints;

use Akeneo\Pim\Structure\Component\Repository\AttributeRepositoryInterface;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class ExistingAttributesValidator extends ConstraintValidator
{
    /** @var AttributeRepositoryInterface */
    protected $attributeRepository;

    /**
     * @param AttributeRepositoryInterface $attributeRepository
     */
    public function __construct(AttributeRepositoryInterface $attributeRepository)
    {
        $this->attributeRepository = $attributeRepository;
    }

    /**
     * {@inheritdoc}
     */
    public function validate($attributes, Constraint $constraint)
    {
        foreach ($attributes as $attribute) {
            if (null === $this->attributeRepository->findOneByIdentifier($attribute)) {
                $this->context->buildViolation($constraint->message, ['%attribute%' => $attribute])->addViolation();
            }
        }
    }
}

Here is the constraint message and its associated validation file:

#/src/Acme/Bundle/CustomBundle/Validator/Constraints/ExistingAttributes.php
<?php

namespace Acme\Bundle\CustomBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;

class ExistingAttributes extends Constraint
{
    /** @var string */
    public $message = 'There are no attributes with such code: "%attribute%"';

    /**
     * {@inheritdoc}
     */
    public function validatedBy()
    {
        return 'pimee_constraint_attributes_validator';
    }
}

#/src/Acme/Bundle/CustomBundle/Resources/config/validation/ProductPatternAction.yml
Acme\Bundle\CustomBundle\Model\ProductPatternAction:
    constraints:
        - Akeneo\Pim\Automation\RuleEngine\Bundle\Validator\Constraint\PropertyAction: ~
    properties:
        field:
           - Type:
                type: string
           - NotBlank: ~
           - Length:
               max: 255
           - Akeneo\Pim\Automation\RuleEngine\Bundle\Validator\Constraint\ExistingSetField: ~
        attributes:
            - Type:
                type: array
            - NotBlank:
                message: The key "attributes" is missing or empty.
            - Acme\Bundle\CustomBundle\Validator\Constraints\ExistingAttributes: ~
        pattern:
           - Type:
                type: string
           - NotBlank: ~
           - Length:
               max: 255

Don’t forget to add these classes in your service definition and to tag them with the proper tag. Also, do not forget to load your services.yml in your dependency injection, either in a bundle extension or in the config directory.

#/src/Acme/Bundle/CustomBundle/Resources/config/services.yml
services:
    acme.action_applier.pattern:
        class: Acme\Bundle\CustomBundle\ActionApplier\PatternActionApplier
        arguments:
            - '@pim_catalog.updater.property_setter'
        tags:
            - { name: akeneo_rule_engine.action_applier, priority: 100 }

    acme.denormalizer.product_rule.pattern_action:
        class: Acme\Bundle\CustomBundle\Denormalizer\ProductRule\PatternActionDenormalizer
        tags:
            - { name: 'pimee_catalog_rule.denormalizer.product_rule' }

    acme.validator.existing_attributes:
        class: Acme\Bundle\CustomBundle\Validator\Constraints\ExistingAttributesValidator
        arguments:
            - '@pim_catalog.repository.attribute'
        tags:
            - { name: validator.constraint_validator, alias: pimee_constraint_attributes_validator }

You have to override the action column from the rule view to use the pattern type.

{# src/Acme/Bundle/CustomBundle/Resources/views/Rules/_actions.html.twig #}
{% for action in value.actions %}
    <p class="AknRule">
        {% if action.type in ["copy", "copy_value"] %}
            {% set parameters = {
            '%from_field%': action.from_field|append_locale_and_scope_context(action.from_locale|default, action.from_scope|default)|highlight,
            '%to_field%': action.to_field|append_locale_and_scope_context(action.to_locale|default, action.to_scope|default)|highlight
            } %}
        {% elseif action.type in ["add", "remove"] %}
            {% set parameters = {
            '%field%': action.field|append_locale_and_scope_context(action.options.locale|default, action.options.scope|default)|highlight,
            '%value%': action.items|present_rule_action_value(action.field)|highlight,
            } %}
        {% elseif action.type == 'pattern' %}
            {% set parameters = {
            '%field%': action.field|append_locale_and_scope_context(action.options.locale|default, action.options.scope|default)|highlight,
            '%attributes%': action.attributes|join(',')|highlight
            } %}
        {% else %}
            {% set parameters = {
            '%field%': action.field|append_locale_and_scope_context(action.locale|default, action.scope|default)|highlight,
            '%value%': action.value|present_rule_action_value(action.field)|highlight
            } %}
        {% endif %}

        {{ ('pimee_catalog_rule.actions.type.' ~ action.type) |trans(parameters)|raw }}
    </p>
{% endfor %}

You also need to override the rule file for the datagrid with your template.

#src/Acme/Bundle/CustomBundle/Resources/config/datagrid/rule.yml
datagrid:
    rule-grid:
        options:
            manageFilters: false
            entityHint: rule
        source:
            acl_resource: pimee_catalog_rule_rule_view_permissions
            repository_method: createDatagridQueryBuilder
            type: pim_datasource_rule
            entity: '%akeneo_rule_engine.model.rule_definition.class%'
        columns:
            code:
                label: pimee_catalog_rule.datagrid.rule-grid.column.code
            conditions:
                label: pimee_catalog_rule.datagrid.rule-grid.column.conditions
                type: twig
                template: AkeneoPimRuleEngineBundle:Rule:_conditions.html.twig
                frontend_type: html
                data_name: content
            actions:
                label: pimee_catalog_rule.datagrid.rule-grid.column.actions
                type: twig
                template: AcmeCustomBundle:Rules:_actions.html.twig
                frontend_type: html
                data_name: content
            impactedSubjectCount:
                label: pimee_catalog_rule.datagrid.rule-grid.column.impacted_product_count.label
                type: twig
                template: AkeneoPimRuleEngineBundle:Rule:_impacted_product_count.html.twig
                frontend_type: html
        properties:
            id: ~
            execute_link:
                type: url
                route: pimee_catalog_rule_rule_execute
                params:
                    - code
            delete_link:
                type: url
                route: pimee_catalog_rule_rule_delete
                params:
                    - id
        actions:
            execute:
                launcherOptions:
                    className: AknIconButton AknIconButton--small AknIconButton--play
                type: ajax
                label: pimee_catalog_rule.datagrid.rule-grid.actions.execute
                link: execute_link
                acl_resource: pimee_catalog_rule_rule_execute_permissions
                confirmation: true
                messages:
                    confirm_title: pimee_catalog_rule.datagrid.rule-grid.actions.execute.confirm_title
                    confirm_content: pimee_catalog_rule.datagrid.rule-grid.actions.execute.confirm_content
                    confirm_ok: pim_common.ok
            delete:
                launcherOptions:
                    className: AknIconButton AknIconButton--small AknIconButton--trash
                type: delete
                label: pimee_catalog_rule.datagrid.rule-grid.actions.delete
                link: delete_link
                acl_resource:  pimee_catalog_rule_rule_delete_permissions
        filters:
            columns:
                code:
                    type: search
                    data_name: r.code
        sorters:
            columns:
                code:
                    data_name: r.code
                impactedSubjectCount:
                    data_name: r.impactedSubjectCount
            default:
                code: '%oro_datagrid.extension.orm_sorter.class%::DIRECTION_ASC'
        mass_actions:
            impacted_product_count:
                type: ajax
                acl_resource: pimee_catalog_rule_rule_impacted_product_count_permissions
                handler: rule_impacted_product_count
                label: pimee_catalog_rule.datagrid.rule-grid.mass_edit_action.impacted_product_count
                route: pimee_catalog_rule_rule_mass_impacted_product_count
                className: 'AknButton AknButton--action AknButtonList-item'
                messages:
                    confirm_title: pimee_catalog_rule.datagrid.rule-grid.mass_edit_action.confirm_title
                    confirm_content: pimee_catalog_rule.datagrid.rule-grid.mass_edit_action.confirm_content
                    confirm_ok: pim_common.ok
            execute:
                type: ajax
                acl_resource: pimee_catalog_rule_rule_execute_permissions
                label: pimee_catalog_rule.datagrid.rule-grid.mass_edit_action.execute
                handler: mass_execute_rule
                className: 'AknButton AknButton--action AknButtonList-item'
                messages:
                    confirm_title: pimee_catalog_rule.datagrid.rule-grid.mass_action.execute.confirm_title
                    confirm_content: pimee_catalog_rule.datagrid.rule-grid.mass_action.execute.confirm_content
                    confirm_ok: pim_common.ok
                    success: pimee_catalog_rule.datagrid.rule-grid.mass_action.execute.success
                    error: pimee_catalog_rule.datagrid.rule-grid.mass_action.execute.error
                    empty_selection: pimee_catalog_rule.datagrid.rule-grid.mass_action.execute.empty_selection
            delete:
                type: delete
                entity_name: rule
                acl_resource: pimee_catalog_rule_rule_delete_permissions
                handler: mass_delete_rule
                label: pimee_catalog_rule.datagrid.rule-grid.mass_edit_action.delete
                className: 'AknButton AknButton--important AknButtonList-item'
                messages:
                    confirm_title: pim_common.confirm_deletion
                    confirm_content: pimee_catalog_rule.datagrid.rule-grid.mass_action.delete.confirm_content
                    confirm_ok: pim_common.delete
                    success: pimee_catalog_rule.datagrid.rule-grid.mass_action.delete.success
                    error: pimee_catalog_rule.datagrid.rule-grid.mass_action.delete.error
                    empty_selection: pimee_catalog_rule.datagrid.rule-grid.mass_action.delete.empty_selection

Then, add the translations.

#src/Acme/Bundle/CustomBundle/Resources/translations/messages.en.yml
pimee_catalog_rule:
    actions:
        type:
            "pattern": Then attributes (%attributes%) from pattern are replaced by specific values into %field%

Here is an example on how you could write a rule.

rules:
    test_pattern:
        priority: 0
        enabled: true
        conditions:
            -
                field: family
                operator: IN
                value:
                    - camcorders
        actions:
            -
                type: pattern
                field: description
                attributes:
                    - name
                    - price
                    - total_megapixels
                pattern: '%%name%% -- %%price%% -- %%total_megapixels%%'
                options:
                    scope: ecommerce
                    locale: en_US

Found a typo or a hole in the documentation and feel like contributing?
Join us on Github!