Display event team players in a two dimensions matrix based on positions

sp_event_players_2d_positions.php

<?php

/**
 * Example Usage.
 */
add_action( 'sportspress_after_event_template', function( $elements ) { 
	$elements['performance']['action'] = function() {
		sp_event_players_2d_positions(
			[ 'team-1', 'team-2', 'team-3', 'team-4' ],			
			[ 'lead', 'second', 'third', 'skipper' ],		
			'home',
			'Players Matrix'
		);
		sportspress_output_event_performance();
	};
	return $elements ;
} );

/**
 * Display current event team players in a two dimensions matrix based on positions
 * @param  array  $x_positions_slugs  X axis positions slugs.
 * @param  array  $y_positions_slugs  Y axis positions slugs.
 * @param  string $team               Which team to use, use team slug, `home` or `away`.
 * @param  string $caption            Table caption.
 * @return void
 */
function sp_event_players_2d_positions( $x_positions_slugs, $y_positions_slugs, $team, $caption = 'Players' ) {

	/**
	 * Use current event ID.
	 */
	if ( is_singular( 'sp_event' ) ) {
		$id = get_the_ID();
	} else {
		return;
	}

	/**
	 * Getting all team players
	 */
	$players_in_event = get_post_meta ( $id, 'sp_players', true );
	if ( 'home' == $team ) {
		$players_in_team = array_values( $players_in_event )[ 0 ];
	} else if ( 'away' == $team ) {
		$players_in_team = array_values( $players_in_event )[ 1 ];
	} else {
		$team_post = get_page_by_path( $team, OBJECT, 'sp_team' );
		if ( ! $team_post ) {
			return;
		}
		$players_in_team = $players_in_event[ $team_post->ID ];
	}
	unset( $players_in_team[ 0 ] );

	/**
	 * Make sure $players_in_team is an array.
	 */
	if ( ! $players_in_team ) {
		$players_in_team = [];
	}

	/**
	 * Prepare X and Y axes positions.
	 */
	$x_positions_ids = [];
	foreach ( $x_positions_slugs as $slug ) {
		$term = get_term_by( 'slug', $slug, 'sp_position' );
		if( is_a( $term , 'WP_Term' ) ) {
			$x_positions_ids[] = $term->term_id;
		}
	}
	$y_positions_ids = [];
	foreach ( $y_positions_slugs as $slug ) {
		$term = get_term_by( 'slug', $slug, 'sp_position' );
		if( is_a( $term , 'WP_Term' ) ) {
			$y_positions_ids[] = $term->term_id;
		}
	}

	/**
	 * Build list.
	 */
	$list_2d = [];
	foreach ( $x_positions_ids as $x ) {
		$list_2d[ $x ] = [ 
			'title' => get_term( $x, 'sp_position' )->name,
			'elements' => [],
		];
		foreach ( $y_positions_ids as $y ) {
			$list_2d[ $x ][ 'elements' ][ $y ] = [ 
				'title' => get_term( $y, 'sp_position' )->name,
				'elements' => [],
			];
			$players_in_xy = array_filter( $players_in_team, function( $player ) use ( $x, $y ) {
				return ! empty( $player[ 'position' ] ) && in_array( $x, $player[ 'position' ] ) && in_array( $y, $player[ 'position' ] );
			} );
			$list_2d[ $x ]['elements'][ $y ][ 'elements' ] = array_map( function( $id ) {
				return get_the_title( $id );
			}, array_keys( $players_in_xy ) );
		}
	}

	/**
	 * Display list.
	 */
	if ( $caption ) {
		echo '<h4 class="sp-table-caption">' . $caption . '</h4>';
	}
	echo '<table class="sp-data-table">';
	echo '<thead>';
	echo '<tr>';
	echo '<th>' . __( 'Position', 'sportspress' ) . '</th>';
	foreach ( $x_positions_ids as $x_position_id  ) {
		echo '<th>' . $list_2d[ $x_position_id ][ 'title' ] . '</th>';
	}
	echo '</tr>';
	echo '</thead>';
	echo '<tbody>';
	$i = 0;
	foreach ( $y_positions_ids as $y_position_id  ) {
		echo '<tr>';
		echo '<th>' . $list_2d[ $x_position_id ][ 'elements' ][ array_values($y_positions_ids)[ $i++ ] ][ 'title' ] . '</th>';
		foreach ( $x_positions_ids as $x_position_id  ) {
			echo '<td>' . implode( '<br>', $list_2d[ $x_position_id ][ 'elements' ][ $y_position_id ][ 'elements' ] ) . '</td>';
		}
		echo '</tr>';
	}
	echo '</tr>';
	echo '</tbody>';
	echo '</table>';
}