Using Slack Slash Commands to get EDD sales info

edd-slack-slash-command.php

<?php

function nftweak_slash_command() {

    # Check to make sure this is a Slash Command Request
    if ( ! isset( $_REQUEST['slack_slash'] ) && 'your_custom_string' != $_REQUEST['slack_slash'] )
        return false;

    # Check to see if a token has been passed as well
    if ( ! isset( $_REQUEST['token'] ) )
        return false;

    # Set additional text strings if sent
    $text = isset ( $_REQUEST['text'] ) ? $_REQUEST['text'] : '';

    # Check that the token is the one that was set in Slack
    if ( 'your_slack_token' == $_REQUEST['token'] ) {

        # Gather EDD sales data
        $stats = new EDD_Payment_Stats;
        $earnings_today = edd_format_amount( $stats->get_earnings( 0, 'today', false ) );
        $monthly_sales = edd_format_amount( $stats->get_earnings( 0, 'this_month' ) );
        $yearly_sales = edd_format_amount( $stats->get_earnings( 0, 'this_year' ) );
        $total_sales = edd_format_amount( edd_get_total_earnings() );
        $month = $stats->get_earnings( 0, 'this_month' );
        $daily_average = edd_format_amount( $month / date( 'j' ) );

        # check additional text to display appriate data
        switch ( $_REQUEST['text'] ) {
            case 'day':
                echo '$' . $earnings_today;
                break;
            case 'month':
                echo '$' . $monthly_sales;
                break;
            case 'year':
                echo '$' . $yearly_sales;
                break;
            case 'lifetime':
                echo '$' . $total_sales;
                break;
            case 'average':
                echo '$' . $daily_average;
                break;
            default :
                echo 'So far Ninja Forms has had *$' . $earnings_today . '* in sales today. Sales this month are currently at *$' . $monthly_sales . '* and this year, *$' . $yearly_sales . '*. Lifetime sales are currently at *$' . $total_sales . '*. This months daily average is currently *$' . $daily_average . '*.';
                break;
        }
        # We need to die or you will send a bunch of html that Slack won't be able to handle
        die();
    }

}
add_action( 'init', 'nftweak_slash_command' );