Implement config object

bin/slim

@@ -17,5 +17,11 @@ if (file_exists(__DIR__ . '/../../../autoload.php')) {
     require __DIR__ . '/../vendor/autoload.php';
 }
 
-$app = new Application();
+//Config SHOULD be placed by init command in the project's root directory
+$configDir = dirname(dirname(__DIR__));
+
+$app = new Application($configDir);
+
+//$app->add(new \Slim\Console\Command\InitCommand());
+
 $app->run();

composer.json

@@ -15,7 +15,8 @@
     "require": {
         "php": "^7.2",
         "symfony/console": "^5.0",
-        "symfony/config": "^5.0"
+        "symfony/config": "^5.0",
+        "ext-json": "*"
     },
     "require-dev": {
         "adriansuter/php-autoload-override": "^1.0",

phpstan.neon.dist

@@ -1,3 +1,4 @@
 parameters:
   level: max
   inferPrivatePropertyTypeFromConstructor: true
+  checkGenericClassInNonGenericObjectType: false

src/Application.php

@@ -10,6 +10,8 @@
 
 namespace Slim\Console;
 
+use Slim\Console\Config\Config;
+use Slim\Console\Config\ConfigResolver;
 use Symfony\Component\Console\Application as SymfonyApplication;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -19,9 +21,14 @@ class Application extends SymfonyApplication
 {
     private const VERSION = '0.1';
 
-    public function __construct()
+    /** @var Config|null */
+    protected $config;
+
+    public function __construct(string $configDir)
     {
         parent::__construct('Slim Console', self::VERSION);
+
+        $this->setConfig($configDir);
     }
 
     /**
@@ -48,4 +55,14 @@ public function doRun(InputInterface $input, OutputInterface $output): int
 
         return parent::doRun($input, $output);
     }
+
+    public function getConfig(): ?Config
+    {
+        return $this->config;
+    }
+
+    public function setConfig(string $configDir): void
+    {
+        $this->config = (new ConfigResolver($configDir))->loadConfig();
+    }
 }

src/Command/AbstractCommand.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * Slim Framework (https://slimframework.com)
+ *
+ * @license https://github.com/slimphp/Slim/blob/4.x/LICENSE.md (MIT License)
+ */
+
+declare(strict_types=1);
+
+namespace Slim\Console\Command;
+
+use Slim\Console\Application;
+use Slim\Console\Config\Config;
+use Symfony\Component\Console\Command\Command as SymfonyCommand;
+
+abstract class AbstractCommand extends SymfonyCommand
+{
+    /**
+     * @return Config|null
+     */
+    public function getConfig(): ?Config
+    {
+        $app = $this->getApplication();
+        if ($app instanceof Application === false) {
+            return null;
+        }
+
+        return $app->getConfig();
+    }
+
+    /**
+     * @param string $configDir
+     */
+    public function setConfig(string $configDir): void
+    {
+        $app = $this->getApplication();
+        if ($app instanceof Application) {
+            $app->setConfig($configDir);
+        }
+    }
+}

src/Config/Config.php

@@ -0,0 +1,173 @@
+<?php
+
+/**
+ * Slim Framework (https://slimframework.com)
+ *
+ * @license https://github.com/slimphp/Slim-Console/blob/0.x/LICENSE.md (MIT License)
+ */
+
+declare(strict_types=1);
+
+namespace Slim\Console\Config;
+
+use ArrayAccess;
+
+use function array_key_exists;
+use function array_merge;
+use function ctype_lower;
+use function is_null;
+use function preg_replace;
+use function strtoupper;
+
+class Config implements ArrayAccess
+{
+    private const ENV_PREFIX = 'SLIM_CONSOLE_';
+
+    /**
+     * @var array<mixed>
+     */
+    private $default = [
+        'bootstrapDir'  => DIRECTORY_SEPARATOR . 'app',
+        'commandsDir'   => DIRECTORY_SEPARATOR . 'Application/Commands',
+        'indexDir'  => DIRECTORY_SEPARATOR . 'public',
+        'indexFile' => DIRECTORY_SEPARATOR . 'index.php',
+        'sourceDir' => DIRECTORY_SEPARATOR . 'src',
+    ];
+
+    /**
+     * @var array<mixed>
+     */
+    private $params = [];
+
+    /**
+     * Config constructor.
+     * @param array<mixed> $params
+     * @param string $configDir
+     */
+    public function __construct(array $params = [], string $configDir = '')
+    {
+        if ($configDir !== '') {
+            $this->set('rootDir', $configDir);
+        }
+        $this->setAll($params);
+    }
+
+    /**
+     * @return array<mixed>
+     */
+    public function all(): array
+    {
+        return $this->params;
+    }
+
+    /**
+     * @param array<mixed> $params
+     * @return void
+     */
+    public function setAll(array $params): void
+    {
+        $params = array_merge($this->default, $params);
+
+        foreach ($params as $key => $value) {
+            //Env variables take precedence
+            $this->params[$key] = $this->getEnvironmentVariableValue((string) $key) ?: $this->get('rootDir') . $value;
+        }
+    }
+
+    /**
+     * @param string $key
+     * @return mixed|null
+     */
+    public function get(string $key)
+    {
+        return $this->params[$key] ?? null;
+    }
+
+    /**
+     * @param string $key
+     * @param mixed $value
+     */
+    public function set(string $key, $value): void
+    {
+        $this->params[$key] = $value;
+    }
+
+    /**
+     * @param string $key
+     * @return bool
+     */
+    public function has(string $key): bool
+    {
+        return isset($this->params[$key]);
+    }
+
+    /**
+     * @param string $key
+     */
+    public function delete(string $key): void
+    {
+        unset($this->params[$key]);
+    }
+
+    /**
+     * @param mixed $key
+     * @return bool
+     */
+    public function offsetExists($key): bool
+    {
+        return $this->has($key);
+    }
+
+    /**
+     * @param mixed $key
+     * @return mixed|null
+     */
+    public function offsetGet($key)
+    {
+        return $this->get($key);
+    }
+
+    /**
+     * @param mixed $key
+     * @param mixed $value
+     */
+    public function offsetSet($key, $value): void
+    {
+        $this->set($key, $value);
+    }
+
+    /**
+     * @param mixed $key
+     */
+    public function offsetUnset($key): void
+    {
+        $this->delete($key);
+    }
+
+    /**
+     * @param string $key
+     * @return string|null
+     */
+    private function getEnvironmentVariableValue(string $key): ?string
+    {
+        //Return nothing for unknown keys
+        if (array_key_exists($key, $this->default) === false) {
+            return null;
+        }
+
+        if (ctype_lower($key) === true) {
+            return strtoupper($key);
+        }
+
+        //Convert CamelCase to Snake_Case
+        $key = preg_replace('/(.)(?=[A-Z])/u', '$1' . '_', $key);
+        if (is_null($key)) {
+            return null;
+        }
+
+        $key = self::ENV_PREFIX . strtoupper($key);
+        $value = getenv($key);
+
+        return $value ?: null;
+    }
+}

src/Config/ConfigResolver.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace Slim\Console\Config;
+
+use InvalidArgumentException;
+use ReflectionClass;
+use Slim\Console\Exception\ConfigNotFoundException;
+
+use function array_filter;
+use function file_exists;
+use function file_get_contents;
+use function implode;
+use function is_array;
+use function is_null;
+use function json_decode;
+use function strpos;
+
+class ConfigResolver
+{
+    public const FORMAT_JSON = 'json';
+    public const FORMAT_PHP = 'php';
+    //public const FORMAT_YAML = 'yaml';
+    private const CONFIG_FILENAME = 'slim-console.config';
+
+    /** @var string|null */
+    private $file = null;
+
+    /** @var string */
+    private $dir;
+
+    public function __construct(string $dir)
+    {
+        $this->dir = $dir;
+    }
+
+    public function loadConfig(): ?Config
+    {
+        $this->locateConfig();
+
+        return $this->loadConfigByFormat();
+    }
+
+    public function getFile(): string
+    {
+        return $this->file ?? "";
+    }
+
+    protected function locateConfig(): void
+    {
+        $reflection = new ReflectionClass($this);
+        $filterFormats = function ($value, $key) {
+            return strpos($key, 'FORMAT') === 0;
+        };
+        $formats = array_filter($reflection->getConstants(), $filterFormats, ARRAY_FILTER_USE_BOTH);
+
+        foreach ($formats as $possibleFormat) {
+            $fileName = $this->dir . DIRECTORY_SEPARATOR . self::CONFIG_FILENAME . '.' . $possibleFormat;
+            if (file_exists($fileName)) {
+                $this->file = $fileName;
+
+                break;
+            }
+        }
+
+        if (is_null($this->file)) {
+            throw new ConfigNotFoundException(
+                'Please create config file, supported formats: ' . implode(',', $formats)
+            );
+        }
+    }
+
+    protected function loadConfigByFormat(): ?Config
+    {
+        if (is_null($this->file)) {
+            return null;
+        }
+
+        $format = pathinfo($this->file, PATHINFO_EXTENSION);
+
+        if ($format === self::FORMAT_PHP) {
+            $array = require($this->file);
+            if (is_array($array) === false) {
+                throw new InvalidArgumentException("The file $this->file should return an array");
+            }
+
+            return new Config($array, $this->dir);
+        }
+
+        if ($format === self::FORMAT_JSON) {
+            $string = (string) file_get_contents($this->file);
+            $array = json_decode($string, true);
+            if (json_last_error() !== JSON_ERROR_NONE) {
+                throw new InvalidArgumentException("The file $this->file should be a valid JSON");
+            }
+
+            return new Config($array, $this->dir);
+        }
+
+        return null;
+    }
+}