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<?php
namespace WPGraphQL\Type\TermObject\Connection;
use GraphQL\Type\Definition\ResolveInfo;
use GraphQLRelay\Connection\ArrayConnection;
use WPGraphQL\AppContext;
use WPGraphQL\Data\ConnectionResolver;
use WPGraphQL\Types;
/**
* Class TermObjectConnectionResolver
*
* @package WPGraphQL\Data\Resolvers
* @since 0.0.5
*/
class TermObjectConnectionResolver extends ConnectionResolver {
/**
* Stores the name of the taxonomy for the connection being resolved
*
* @var string $taxonomy
*/
public static $taxonomy;
/**
* TermObjectConnectionResolver constructor.
*
* @param $taxonomy
*/
public function __construct( $taxonomy ) {
self::$taxonomy = $taxonomy;
}
/**
* Returns an array of query_args to use in the WP_Term_Query to fetch the necessary terms for the connection
*
* @param $source
* @param array $args
* @param AppContext $context
* @param ResolveInfo $info
*
* @return array
*/
public static function get_query_args( $source, array $args, AppContext $context, ResolveInfo $info ) {
/**
* Set the taxonomy for the $args
*/
$query_args['taxonomy'] = ! empty( self::$taxonomy ) ? self::$taxonomy : 'category';
/**
* Prepare for later use
*/
$last = ! empty( $args['last'] ) ? $args['last'] : null;
$first = ! empty( $args['first'] ) ? $args['first'] : null;
/**
* Set the default parent for TermObject Queries to be "0" to only get top level terms, unless
* includeChildren is set
*/
$query_args['parent'] = 0;
/**
* Set hide_empty as false by default
*/
$query_args['hide_empty'] = false;
/**
* Set the number, ensuring it doesn't exceed the amount set as the $max_query_amount
*/
$query_args['number'] = min( max( absint( $first ), absint( $last ), 10 ), self::get_query_amount( $source, $args, $context, $info ) ) + 1;
/**
* Orderby Name by default
*/
$query_args['orderby'] = 'name';
/**
* Take any of the $args that were part of the GraphQL query and map their
* GraphQL names to the WP_Term_Query names to be used in the WP_Term_Query
*
* @since 0.0.5
*/
$input_fields = [];
if ( ! empty( $args['where'] ) ) {
$input_fields = self::sanitize_input_fields( $args['where'], $source, $args, $context, $info );
}
/**
* Merge the default $query_args with the $args that were entered
* in the query.
*
* @since 0.0.5
*/
if ( ! empty( $input_fields ) ) {
$query_args = array_merge( $query_args, $input_fields );
}
/**
* If there's no orderby params in the inputArgs, set order based on the first/last argument
*/
if ( empty( $query_args['order'] ) ) {
$query_args['order'] = ! empty( $last ) ? 'DESC' : 'ASC';
}
/**
* Set the graphql_cursor_offset
*/
$query_args['graphql_cursor_offset'] = self::get_offset( $args );
$query_args['graphql_cursor_compare'] = ( ! empty( $last ) ) ? '>' : '<';
/**
* Pass the graphql $args to the WP_Query
*/
$query_args['graphql_args'] = $args;
/**
* If the source of the Query is a Post object, adjust the query args to only query terms
* connected to the post object
*
* @since 0.0.5
*/
if ( true === is_object( $source ) ) {
switch ( true ) {
case $source instanceof \WP_Post:
$query_args['object_ids'] = $source->ID;
break;
case $source instanceof \WP_Term:
$query_args['parent'] = ! empty( $source->term_id ) ? $source->term_id : 0;
break;
default:
break;
}
}
/**
* Filter the query_args that should be applied to the query. This filter is applied AFTER the input args from
* the GraphQL Query have been applied and has the potential to override the GraphQL Query Input Args.
*
* @param array $query_args array of query_args being passed to the
* @param mixed $source source passed down from the resolve tree
* @param array $args array of arguments input in the field as part of the GraphQL query
* @param AppContext $context object passed down the resolve tree
* @param ResolveInfo $info info about fields passed down the resolve tree
*
* @since 0.0.6
*/
$query_args = apply_filters( 'graphql_term_object_connection_query_args', $query_args, $source, $args, $context, $info );
return $query_args;
}
/**
* This runs the query and returns the response
*
* @param $query_args
*
* @return \WP_Term_Query
*/
public static function get_query( $query_args ) {
$query = new \WP_Term_Query( $query_args );
return $query;
}
/**
* This gets the connection to return
*
* @param array|mixed $query The query that was processed to get data
* @param array $items The array slice that was returned
* @param mixed $source The source being passed down the resolve tress
* @param array $args The input args for the resolving field
* @param AppContext $context The context being passed down the resolve tree
* @param ResolveInfo $info The ResolveInfo passed down the resolve tree
*
* @return array
*/
public static function get_connection( $query, array $items, $source, array $args, AppContext $context, ResolveInfo $info ) {
/**
* Get the $posts from the query
*/
$items = ! empty( $items ) && is_array( $items ) ? $items : [];
/**
* Set whether there is or is not another page
*/
$has_previous_page = ( ! empty( $args['last'] ) && count( $items ) > self::get_amount_requested( $args ) ) ? true : false;
$has_next_page = ( ! empty( $args['first'] ) && count( $items ) > self::get_amount_requested( $args ) ) ? true : false;
/**
* Slice the array to the amount of items that were requested
*/
$items = array_slice( $items, 0, self::get_amount_requested( $args ) );
/**
* Get the edges from the $items
*/
$edges = self::get_edges( $items, $source, $args, $context, $info );
/**
* Find the first_edge and last_edge
*/
$first_edge = $edges ? $edges[0] : null;
$last_edge = $edges ? $edges[ count( $edges ) - 1 ] : null;
/**
* Create the connection to return
*/
$connection = [
'edges' => $edges,
'debug' => [
'queryRequest' => ! empty( $query->request ) ? $query->request : null,
],
'pageInfo' => [
'hasPreviousPage' => $has_previous_page,
'hasNextPage' => $has_next_page,
'startCursor' => ! empty( $first_edge['cursor'] ) ? $first_edge['cursor'] : null,
'endCursor' => ! empty( $last_edge['cursor'] ) ? $last_edge['cursor'] : null,
],
'nodes' => $items,
];
return $connection;
}
/**
* Takes an array of items and returns the edges
*
* @param $items
*
* @return array
*/
public static function get_edges( $items, $source, $args, $context, $info ) {
$edges = [];
/**
* If we're doing backward pagination we want to reverse the array before
* returning it to the edges
*/
if ( ! empty( $args['last'] ) ) {
$items = array_reverse( $items );
}
if ( ! empty( $items ) && is_array( $items ) ) {
foreach ( $items as $item ) {
$edges[] = [
'cursor' => ArrayConnection::offsetToCursor( $item->term_id ),
'node' => $item,
];
}
}
return $edges;
}
/**
* This maps the GraphQL "friendly" args to get_terms $args.
* There's probably a cleaner/more dynamic way to approach this, but this was quick. I'd be down
* to explore more dynamic ways to map this, but for now this gets the job done.
*
* @param array $args Array of query "where" args
* @param mixed $source The query results
* @param array $all_args All of the query arguments (not just the "where" args)
* @param AppContext $context The AppContext object
* @param ResolveInfo $info The ResolveInfo object
*
* @since 0.0.5
* @return array
* @access public
*/
public static function sanitize_input_fields( array $args, $source, array $all_args, AppContext $context, ResolveInfo $info ) {
$arg_mapping = [
'objectIds' => 'object_ids',
'hideEmpty' => 'hide_empty',
'excludeTree' => 'exclude_tree',
'termTaxonomId' => 'term_taxonomy_id',
'nameLike' => 'name__like',
'descriptionLike' => 'description__like',
'padCounts' => 'pad_counts',
'childOf' => 'child_of',
'cacheDomain' => 'cache_domain',
'updateTermMetaCache' => 'update_term_meta_cache',
];
/**
* Map and sanitize the input args to the WP_Term_Query compatible args
*/
$query_args = Types::map_input( $args, $arg_mapping );
/**
* Filter the input fields
* This allows plugins/themes to hook in and alter what $args should be allowed to be passed
* from a GraphQL Query to the get_terms query
*
* @param array $query_args Array of mapped query args
* @param array $args Array of query "where" args
* @param string $taxonomy The name of the taxonomy
* @param mixed $source The query results
* @param array $all_args All of the query arguments (not just the "where" args)
* @param AppContext $context The AppContext object
* @param ResolveInfo $info The ResolveInfo object
*
* @since 0.0.5
* @return array
*/
$query_args = apply_filters( 'graphql_map_input_fields_to_get_terms', $query_args, $args, self::$taxonomy, $source, $all_args, $context, $info );
return ! empty( $query_args ) && is_array( $query_args ) ? $query_args : [];
}
}