Hal\Application\Config\File\ConfigFileReaderJson

Complexity

Total Complexity

12

Size/Duplication

Total Lines	87
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
B	read()	0	44	8
A	collapseArray()	0	14	3

<?php

namespace Hal\Application\Config\File;

use Hal\Application\Config\Config;
use RecursiveArrayIterator;
use RecursiveIteratorIterator;

class ConfigFileReaderJson implements ConfigFileReaderInterface
{
    /**
     * @var string
     */
    private $filename;

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

    /**
     * @param Config $config
     *
     * @return void
     */
    public function read(Config $config)
    {
        $jsonText = file_get_contents($this->filename);

        if (false === $jsonText) {
            throw new \InvalidArgumentException("Cannot read configuration file '{$this->filename}'");
        }

        $jsonData = json_decode($jsonText, true);

        if (false === $jsonData) {
            throw new \InvalidArgumentException("Bad json file '{$this->filename}'");
        }

        if (isset($jsonData['includes'])) {
            $includes = $jsonData['includes'];
            $files = [];
            // with config file, includes are relative to config file
            foreach ($includes as $include) {
                $files[] = dirname($this->filename) . DIRECTORY_SEPARATOR . $include;
            }
            $config->set('files', $files);
            unset($jsonData['includes']);
        }

        if (isset($jsonData['groups'])) {
            $config->set('groups', $jsonData['groups']);
            unset($jsonData['groups']);
        }

        if (isset($jsonData['excludes'])) {
            // retro-compatibility
            // "exclude" is a string
            // excludes is an array
            $config->set('exclude', $jsonData['excludes']);
            unset($jsonData['excludes']);
        }

        $jsonDataImploded = $this->collapseArray($jsonData);

        foreach ($jsonDataImploded as $key => $value) {
            $config->set($key, $value);
        }
    }

    /**
     * Collapses array into a one-dimensional one by imploding nested keys with '-'
     *
     * @param array $arr
     *
     * @return array
     */
    private function collapseArray(array $arr)
    {
        $iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
        $result = [];
        foreach ($iterator as $leafValue) {
            $keys = [];
            foreach (range(0, $iterator->getDepth()) as $depth) {
                $keys[] = $iterator->getSubIterator($depth)->key();
            }
            $result[implode('-', $keys)] = $leafValue;
        }

        return $result;
    }
}