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Informations about the package opal

O-pal: Companion class generator for PHP

Generate and instantiate PHP companion objects. Companion objects are genated based on two inputs, a class definition and a companion object template. Template documentation can be found on the php-code-templates github site

Example

Given a companion template (Validator.tmpl.php):

<?php
namespace my\dyn\ns;

/**
 * Simple validator that ensures that there are no null properties.
 */
class /*# modelName */Validator {

    /**
     * Validate the given model.
     *
     * @return true of all properties are non-null, false otherwise.
     */
    public function validate(/*# modelFq */ $model) {

        #{ each properties as prop
            if ($model->get/*# prop #/() === null) {
                return false;
            }
        #}

        return true;
    }
}

And a generator implementation:

<?php
namespace my\ns;

use \zpt\gen\CompanionGenerator;

/**
 * A class generator for model validators.
 */
class ValidatorGenerator extends CompanionGenerator {

    public static $companionNs = 'my\dyn\ns';

    /**
     * @Override
     */
    public function getCompanionNamespace() {
        return self::$companionNs;
    }

    /**
     * @Override
     */
    public function getTemplatePath() {
        return __DIR__ . '/Validator.tmpl.php';
    }

    /**
     * @Override
     */
    public function getValues($className) {
        $values = array();

        $refClass = new ReflectionClass($className);
        $properties = array();
        foreach ($refClass->getMethods() as $method) {
          if (substr($method->getName(), 0, 3) === 'get') {
              $properties[] = substr($method->getName(), 3));
          }
        }

        $values['properties'] = $properties;
        return $values;
    }
}

A companion object for SomeClass can now be generated with the following:

<?php
$companionGenerator = new ValidatorGenerator($outputPath);
$companionGenerator->generate('SomeClass');

They can be instantiated with the following (with my\dyn\ns added to an autoloader):

<?php
$companionLoader = new CompanionLoader($outputPath);
$validator = $companionLoader->get(
    ValidatorGenerator::$actorNamespace,
    'SomeClass'
);

or

<?php
class ValidatorLoader extends CompanionLoader {

    public function loadFor($class) {
        return parent::get(ValidatorGenerator::$actorNs, 'SomeClass');
    }
}

(new ValidatorLoader)->loadFor('SomeClass');

All versions of opal with dependencies

PHP Build Version
Package Version
Requires php Version >=5.3.0
zeptech/code-templates Version 2.0.*
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