User Meta Shortcodes

[MissVeronica]

Describe the bug
User Meta Shortcodes user_id parameter is not set by um_profile_id() when user_id is empty in the shortcode.

UM Support Forum issue
https://wordpress.org/support/topic/unable-to-get-user-info/

Versions
Tested both version 1.0.0 included in UM Extended 2.0.4
and version 1.0.1 in the old ZIP file format.

[MissVeronica]

This statement in source code is WRONG

Usage [um_user user_id="" meta_key="" ] // leave user_id empty if you want to retrive the current user's meta value.

Correct statement is

Usage [um_user meta_key="any_meta_key" ] //remove user_id if you want to retrieve the current user's meta value.

Make this clear in the documentation too.
Users are using [um_user user_id="" meta_key="birth_date"] which will not give desired results.

UM Support Forum issue
https://wordpress.org/support/topic/display-custom-field-8/

[MissVeronica]

Addition of 'um_user' in the parameter list will allow for usage of the WP filter hook "shortcode_atts_{$shortcode}"

	public function shortcode( $atts ) {

		$atts = shortcode_atts(
			array(
				'user_id'  => um_profile_id(),
				'meta_key' => '', //phpcs:ignore
			),
			$atts,
			'um_user'
		);

		/**
		 * Filters shortcode attributes.
		 *
		 * If the third parameter of the shortcode_atts() function is present then this filter is available.
		 * The third parameter, $shortcode, is the name of the shortcode.
		 *
		 * @since 3.6.0
		 * @since 4.4.0 Added the `$shortcode` parameter.
		 *
		 * @param array  $out       The output array of shortcode attributes.
		 * @param array  $pairs     The supported attributes and their defaults.
		 * @param array  $atts      The user defined shortcode attributes.
		 * @param string $shortcode The shortcode name.
		 */
		$out = apply_filters( "shortcode_atts_{$shortcode}", $out, $pairs, $atts, $shortcode );