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<?php |
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namespace MathieuTu\Exporter; |
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use Tightenco\Collect\Support\Arr; |
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use Tightenco\Collect\Support\Collection; |
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class ExporterService |
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{ |
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protected $exportable; |
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public function __construct($exportable) |
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{ |
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$this->exportable = $exportable; |
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} |
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public static function exportFrom($exportable, array $attributes): Collection |
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{ |
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return (new self($exportable))->export($attributes); |
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} |
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public function export(array $attributes): Collection |
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{ |
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return $this->createCollection($attributes, function ($attribute, $key) { |
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if (is_array($attribute)) { |
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return $this->exportArray($key, $attribute); |
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} |
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if (!is_int($key)) { |
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return $this->exportNestedAttribute($key, $attribute); |
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} |
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return $this->exportAttribute($attribute); |
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}); |
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} |
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protected function createCollection(array $attributes, callable $callback): Collection |
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{ |
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return $this->collect($attributes)->mapWithKeys($callback); |
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} |
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protected function collect($items): Collection |
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{ |
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return Collection::make($items); |
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} |
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protected function exportArray(string $key, array $attribute): array |
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{ |
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if ($this->hasWildcard($attribute)) { |
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return $this->exportWildcard($key, $attribute); |
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} |
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return $this->exportNestedAttributes($key, $attribute); |
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} |
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protected function hasWildcard(array $array): bool |
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{ |
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return array_keys($array) === ['*']; |
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} |
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protected function exportWildcard(string $key, array $array): array |
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{ |
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return [$key => $this->collect($this->getAttributeValue($key))->map(function ($exportable) use ($array) { |
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return self::exportFrom($exportable, $array['*']); |
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})]; |
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} |
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protected function exportNestedAttributes(string $key, array $array): array |
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{ |
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return [$key => self::exportFrom($this->getAttributeValue($key), $array)]; |
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} |
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protected function exportNestedAttribute($key, $attribute): array |
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{ |
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return [$key => $this->getAttributeValue("$key.$attribute")]; |
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} |
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protected function exportAttribute(string $attribute) |
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{ |
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if ($export = $this->attributeIsAFunction($attribute)) { |
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return $export; |
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} |
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return [$attribute => $this->getAttributeValue($attribute)]; |
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} |
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protected function attributeIsAFunction($attribute) |
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{ |
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if (preg_match("/(.*)\((.*)\)$/", $attribute, $groups)) { |
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return [$groups[1] => call_user_func_array([$this->exportable, $groups[1]], array_map('trim', explode(',', $groups[2])))]; |
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} |
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return null; |
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} |
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protected function getAttributeValue($attribute, $default = null) |
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{ |
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// inspired by Laravel's data_get method. |
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$target = $this->exportable; |
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$attribute = is_array($attribute) ? $attribute : explode('.', $attribute); |
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while (($segment = array_shift($attribute)) !== null) { |
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if ($segment === '*') { |
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if ($target instanceof Collection) { |
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$target = $target->all(); |
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} elseif (!is_array($target)) { |
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return value($default); |
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} |
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$result = Arr::pluck($target, $attribute); |
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return in_array('*', $attribute) ? Arr::collapse($result) : $result; |
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} |
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if (Arr::accessible($target) && Arr::exists($target, $segment)) { |
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$target = $target[$segment]; |
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} elseif (is_object($target) && isset($target->{$segment})) { |
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$target = $target->{$segment}; |
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} elseif (is_object($target) && method_exists($target, $getter = 'get' . ucfirst($segment))) { |
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$target = call_user_func([$target, $getter]); |
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} else { |
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return value($default); |
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} |
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} |
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return $target; |
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} |
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} |
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mathieutu /
exporter
