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<?php
namespace YOOtheme\Builder\Source;
class SourceQuery
{
/**
* Creates a source query.
*
* @param object $node
*
* @return array
*/
public function create($node)
{
return $this->querySource($node->source, [
'kind' => 'OperationDefinition',
'operation' => 'query',
]);
}
/**
* Query source definition.
*
* @param object $source
* @param array $parent
*
* @return array
*/
public function querySource($source, array $parent)
{
$root = $query = $source->query;
// add field selection
if (isset($source->query->field)) {
$query->selections = [$source->query->field];
$query = $source->query->field;
}
// add source properties
if (isset($source->props)) {
$query->selections = $source->props;
$props = [];
// find properties to alias
foreach ((array) $source->props as $prop) {
if (in_array($prop->name, $props)) {
$prop->alias = count($props);
}
$props[] = $prop->name;
}
}
return $this->queryField($root, $parent);
}
/**
* Create nested fields AST.
*
* @param object $field
* @param array $parent
*
* @return array
*/
public function queryField($field, array $parent)
{
$selections = null;
foreach (array_reverse(explode('.', $field->name)) as $name) {
$result = [
'kind' => 'Field',
'name' => [
'kind' => 'Name',
'value' => $name,
],
];
if (!$selections) {
$selection = isset($field->selections) ? $field->selections : [];
if (isset($field->alias)) {
$result['alias'] = $this->createAlias($field, $name);
}
if (isset($field->arguments)) {
$result['arguments'] = $this->createArguments($field->arguments);
}
if (isset($field->directives)) {
$result['directives'] = $this->createDirectives($field->directives);
}
foreach ((array) $selection as $select) {
$result = $this->queryField($select, $result);
}
} else {
$result['selectionSet']['kind'] = 'SelectionSet';
$result['selectionSet']['selections'][] = $selections;
}
$selections = $result;
}
$parent['selectionSet']['kind'] = 'SelectionSet';
$parent['selectionSet']['selections'][] = $selections;
return $parent;
}
/**
* Create field AST.
*
* @param mixed $directives
*
* @return array
*/
public function createDirectives($directives)
{
$result = [];
foreach ($directives as $directive) {
$result[] = [
'kind' => 'Directive',
'name' => [
'kind' => 'Name',
'value' => $directive->name,
],
'arguments' => isset($directive->arguments)
? $this->createArguments($directive->arguments)
: null,
];
}
return $result;
}
/**
* Create field AST.
*
* @param mixed $arguments
*
* @return array
*/
public function createArguments($arguments)
{
$result = [];
foreach ((array) $arguments as $name => $value) {
$result[] = [
'kind' => 'Argument',
'name' => [
'kind' => 'Name',
'value' => $name,
],
'value' => $this->createValue($value),
];
}
return $result;
}
/**
* Create field AST.
*
* @param array $values
*
* @return array
*/
public function createFields(array $values)
{
$fields = [];
foreach ($values as $name => $value) {
$fields[] = [
'kind' => 'ObjectField',
'name' => [
'kind' => 'Name',
'value' => $name,
],
'value' => $this->createValue($value),
];
}
return $fields;
}
/**
* Create field AST.
*
* @param mixed $value
*
* @return array
*/
public function createValue($value)
{
$type = gettype($value);
if ($type === 'array') {
return [
'kind' => 'ListValue',
'values' => array_map([$this, 'createValue'], $value),
];
}
if ($type === 'object') {
return [
'kind' => 'ObjectValue',
'fields' => $this->createFields(get_object_vars($value)),
];
}
return [
'kind' => ucfirst(strtr($type, ['integer' => 'int']) . 'Value'),
'value' => (string) $value,
];
}
/**
* Create field AST.
*
* @param object $field
* @param string $name
*
* @return array
*/
public function createAlias($field, $name)
{
// append alias to field name
$field->name .= $field->alias;
return [
'kind' => 'Name',
'value' => $name . $field->alias,
];
}
}