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✏️ Editing: class.wpcom-json-api-get-taxonomies-endpoint.php

<?php

new WPCOM_JSON_API_Get_Taxonomies_Endpoint( array(
	'description' => "Get a list of a site's categories.",
	'group'       => 'taxonomy',
	'stat'        => 'categories',
	'method'      => 'GET',
	'path'        => '/sites/%s/categories',
	'path_labels' => array(
		'$site'     => '(int|string) Site ID or domain'
	),
	'query_parameters' => array(
		'number'   => '(int=100) The number of categories to return. Limit: 1000.',
		'offset'   => '(int=0) 0-indexed offset.',
		'page'     => '(int) Return the Nth 1-indexed page of categories. Takes precedence over the <code>offset</code> parameter.',
		'search'   => '(string) Limit response to include only categories whose names or slugs match the provided search query.',
		'order'    => array(
			'ASC'  => 'Return categories in ascending order.',
			'DESC' => 'Return categories in descending order.',
		),
		'order_by' => array(
			'name'  => 'Order by the name of each category.',
			'count' => 'Order by the number of posts in each category.',
		),
	),
	'response_format' => array(
		'found'      => '(int) The number of categories returned.',
		'categories' => '(array) Array of category objects.',
	),

'allow_fallback_to_jetpack_blog_token' => true,

'example_request'  => 'https://public-api.wordpress.com/rest/v1/sites/en.blog.wordpress.com/categories/?number=5'
) );

new WPCOM_JSON_API_Get_Taxonomies_Endpoint( array(
	'description' => "Get a list of a site's tags.",
	'group'       => 'taxonomy',
	'stat'        => 'tags',
	'method'      => 'GET',
	'path'        => '/sites/%s/tags',
	'path_labels' => array(
		'$site'     => '(int|string) Site ID or domain'
	),
	'query_parameters' => array(
		'number'   => '(int=100) The number of tags to return. Limit: 1000.',
		'offset'   => '(int=0) 0-indexed offset.',
		'page'     => '(int) Return the Nth 1-indexed page of tags. Takes precedence over the <code>offset</code> parameter.',
		'search'   => '(string) Limit response to include only tags whose names or slugs match the provided search query.',
		'order'    => array(
			'ASC'  => 'Return tags in ascending order.',
			'DESC' => 'Return tags in descending order.',
		),
		'order_by' => array(
			'name'  => 'Order by the name of each tag.',
			'count' => 'Order by the number of posts in each tag.',
		),
	),

'allow_fallback_to_jetpack_blog_token' => true,

'response_format' => array(
		'found'    => '(int) The number of tags returned.',
		'tags'     => '(array) Array of tag objects.',
	),
	'example_request'  => 'https://public-api.wordpress.com/rest/v1/sites/en.blog.wordpress.com/tags/?number=5'
) );

class WPCOM_JSON_API_Get_Taxonomies_Endpoint extends WPCOM_JSON_API_Endpoint {
	// /sites/%s/tags       -> $blog_id
	// /sites/%s/categories -> $blog_id
	function callback( $path = '', $blog_id = 0 ) {
		$blog_id = $this->api->switch_to_blog_and_validate_user( $this->api->get_blog_id( $blog_id ) );
		if ( is_wp_error( $blog_id ) ) {
			return $blog_id;
		}

$args = $this->query_args();
		$args = $this->process_args( $args );

if ( preg_match( '#/tags#i', $path ) ) {
			return $this->tags( $args );
		} else {
			return $this->categories( $args );
		}
	}

function process_args( $args ) {
		if ( $args['number'] < 1 ) {
			$args['number'] = 100;
		} elseif ( 1000 < $args['number'] ) {
			return new WP_Error( 'invalid_number',  'The NUMBER parameter must be less than or equal to 1000.', 400 );
		}

if ( isset( $args['page'] ) ) {
			if ( $args['page'] < 1 ) {
				$args['page'] = 1;
			}

$args['offset'] = ( $args['page'] - 1 ) * $args['number'];
			unset( $args['page'] );
		}

if ( $args['offset'] < 0 ) {
			$args['offset'] = 0;
		}

$args['orderby'] = $args['order_by'];
		unset( $args['order_by'] );

unset( $args['context'], $args['pretty'], $args['http_envelope'], $args['fields'] );
		return $args;
	}

function categories( $args ) {
		$args['get'] = 'all';

$cats = get_categories( $args );
		unset( $args['offset'] );
		$found = wp_count_terms( 'category', $args );

$cats_obj = array();
		foreach ( $cats as $cat ) {
			$cats_obj[] = $this->format_taxonomy( $cat, 'category', 'display' );
		}

return array(
			'found'       => (int) $found,
			'categories'  => $cats_obj
		);
	}

function tags( $args ) {
		$args['get'] = 'all';

$tags = (array) get_tags( $args );
		unset( $args['offset'] );
		$found = wp_count_terms( 'post_tag', $args );

$tags_obj = array();
		foreach ( $tags as $tag ) {
			$tags_obj[] = $this->format_taxonomy( $tag, 'post_tag', 'display' );
		}

return array(
			'found' => (int) $found,
			'tags'  => $tags_obj
		);
	}
}

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