Updates a wpf_logins_streak field each time a user logs in on two consecutive days

wpf-track-login-streak.php

<?php

function wpf_track_login_streak( $meta_id, $user_id, $meta_key, $meta_value ) {

	if ( 'wpf_last_login' === $meta_key ) { // this runs every time the wpf_last_login field is about to be updated.

		$prev_value = get_user_meta( $user_id, 'wpf_last_login', true ); // get the previous last login timestamp.

		$prev_value = floor( absint( $prev_value ) / DAY_IN_SECONDS ); // Convert to days since Jan 1st 1970.

		$meta_value = floor( absint( $meta_value ) / DAY_IN_SECONDS ) ; // Convert to days since Jan 1st 1970.

		if ( ( $prev_value + 1 ) === $meta_value ) {

			// If the user's last login was on the previous day.

			$streak = get_user_meta( $user_id, 'wpf_logins_streak', true ); // get the current streak.

			if ( empty( $streak ) ) {
				$streak = 0; // if this is the first time, start with 0.
			}

			$streak++; // add 1 to the streak.

		} elseif ( ( $prev_value + 1 ) > $meta_value ) {

			// If for some reason the last login was today, don't do anything.

			return;

		} elseif ( ( $prev_value + 1 ) < $meta_value ) {

			// If the previous login was before yesterday, reset the streak.

			$streak = 1;

		}

		update_user_meta( $user_id, 'wpf_logins_streak', $streak ); // save the new streak to the database.

		wp_fusion()->user->push_user_meta( $user_id, array( 'wpf_logins_streak' => $streak ) ); // sync it to the CRM.

	}

}

add_action( 'update_user_meta', 'wpf_track_login_streak', 10, 4 );