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<?php namespace YOOtheme\Configuration; class Resolver { /** * @var int / protected $ctime; /* * @var string / protected $cache; /* * @var string\|false / protected $key = false; /* * @var array / protected $path = []; /* * @var array / protected $params = []; /* * @var array / protected $callbacks = []; /* * Constructor. * * @param string $cache * @param array $params * @param array $callbacks / public function __construct($cache, array $params = [], array $callbacks = []) { if (is_dir($cache)) { $this->cache = $cache; $this->ctime = filectime(__FILE__); } $this->params = $params; $this->callbacks = $callbacks; } /* * Resets the key and path. / public function __clone() { $this->key = false; $this->path = []; } /* * Resolves value and evaluates it after applying callbacks. * * @param mixed $value * @param array $params * * @return mixed / public function resolve($value, array $params = []) { $resolve = fn($value) => $value instanceof Node ? $value->resolve($params + $this->params) : $value; return $this->resolveValue($value, array_merge($this->callbacks, [$resolve])); } /* * Resolves value recursively. * * @param mixed $value * @param array $callbacks * * @return mixed / public function resolveValue($value, array $callbacks) { // apply callbacks foreach ($callbacks as $callback) { $value = $callback($value, $this->key, $this->path); } if (is_array($value) && !empty($value)) { $array = []; $depth = count($this->path); // update path, if key was changed if ($this->key !== end($this->path)) { array_splice($this->path, -1, 1, $this->key); } foreach ($value as $key => $val) { // update key and path $this->key = $key; $this->path[$depth] = $key; // resolve recursively $val = $this->resolveValue($val, $callbacks); $array[$this->key] = $val; } // set key to last path part array_pop($this->path); $this->key = end($this->path); return $array; } return $value; } /* * Compiles a parsable string of a value after applying callbacks. * * @param mixed $value * @param array $params * * @return string / public function compile($value, array $params = []) { $compile = fn($value) => $value instanceof Node ? $value->compile($params + $this->params) : var_export($value, true); return $this->compileValue($this->resolveValue($value, $this->callbacks), $compile); } /* * Compiles a parsable string representation of a value. * * @param mixed $value * @param callable $callback * @param int $indent * * @return string / public function compileValue($value, ?callable $callback = null, $indent = 0) { if (is_array($value)) { $array = []; $assoc = array_values($value) !== $value; $indention = str_repeat(' ', $indent); $indentlast = $assoc ? "\n" . $indention : ''; foreach ($value as $key => $val) { $array[] = ($assoc ? "\n " . $indention . var_export($key, true) . ' => ' : '') . $this->compileValue($val, $callback, $indent + 1); } return '[' . join(', ', $array) . $indentlast . ']'; } return $callback ? $callback($value) : var_export($value, true); } /* * Loads a file. * * @param string $file * @param array $params * * @throws \RuntimeException * * @return array\|null / public function loadFile($file, array $params = []) { $params = array_merge($this->params, $params, compact('file')); $extension = pathinfo($file, PATHINFO_EXTENSION); if ($extension === 'php') { return $this->loadPhpFile($file, $params); } if ($extension === 'json') { return $this->loadJsonFile($file, $params); } throw new \RuntimeException("Unable to load file '{$file}'"); } /* * Loads a PHP file. * * @param string $file * @param array $params * * @throws \RuntimeException * * @return array / protected function loadPhpFile($file, array $params = []) { extract($params, EXTR_SKIP); if (!is_array($value = @include $file)) { throw new \RuntimeException("Unable to load file '{$file}'"); } return $value; } /* * Loads a JSON config file. * * @param string $file * @param array $params * * @throws \RuntimeException * * @return array / protected function loadJsonFile($file, array $params = []) { extract($params, EXTR_SKIP); $cache = sprintf( '%s/%s-%s.php', $this->cache, pathinfo($file, PATHINFO_FILENAME), hash('crc32b', $file), ); if ( $this->cache && is_file($cache) && filectime($cache) > max($this->ctime, filectime($file)) ) { return include $cache; } if (!($content = @file_get_contents($file))) { throw new \RuntimeException("Unable to load file '{$file}'"); } if (!is_array($value = @json_decode($content, true))) { throw new \RuntimeException("Invalid JSON format in '{$file}'"); } if ($this->cache && $this->writeCacheFile($cache, $value, $params)) { return include $cache; } return $this->resolve($value, $params); } /* * Writes a cache file. * * @param string $cache * @param array $value * @param array $params * * @return bool */ protected function writeCacheFile($cache, array $value, array $params = []) { $temp = uniqid("{$this->cache}/temp-" . hash('crc32b', $cache)); $data = "<?php // \$file = {$params['file']}\n\nreturn {$this->compile( $value, $params, )};\n"; if (@file_put_contents($temp, $data) && @rename($temp, $cache)) { if (function_exists('opcache_invalidate')) { opcache_invalidate($cache, true); } return true; } // remove temp file if rename failed if (file_exists($temp)) { @unlink($temp); } return false; } }

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