<?php

namespace Anax\Common;

/**
 * Trait implementing reading from config-file and storing options in
 * $this->config.
 */
trait ConfigureTrait
{
    /** @var [] $config store the configuration in this array.   */
    private $config = [];


    /**
     * Read configuration from file or array, if a file, first check in
     * ANAX_APP_PATH/config and then in ANAX_INSTALL_PATH/config.
     *
     * @param []|string $what is an array with key/value config options
     *                        or a file to be included which returns such
     *                        an array.
     *
     * @throws Exception when argument if not a filer nor an array.
     *
     * @return self for chaining.
     */
    public function configure($what)
    {
        if (is_array($what)) {
            $this->config = $what;
            return $this;
        }

        if (defined("ANAX_APP_PATH")) {
            $path = ANAX_APP_PATH . "/config/$what";
            if (is_readable($path)) {
                $this->config = require $path;
                return $this;
            }
        }

        if (defined("ANAX_INSTALL_PATH")) {
            $path = ANAX_INSTALL_PATH . "/config/$what";
            if (is_readable($path)) {
                $this->config = require $path;
                return $this;
            }
        }

        throw new ConfigurationException("Configure item '$what' is not an array nor a readable file.");
    }
}