By default, GamiPress just will award an achievement or a rank to the user that meets all requirements (sequentially or not, depending of its configuration).

A desired workflow on some gamification environments is the ability to allow users to earn an achievement or rank if they complete a simple requirement of the list of requirements.

Enabling OR steps for achievements

With the following snippet, you will enable the “OR steps” to the achievement you want:

function my_prefix_award_achievement_if_any_step_completed( $user_id = 0, $step_id = 0 ) {
    // Achievement IDs you want to allow to be earned by completing just one of their steps
    $achievement_ids = array( 123, 456, 789 );
    if( get_post_type( $step_id ) === 'step' ) {
        $achievement = gamipress_get_step_achievement( $step_id );
        // Check if user has not been already earned this achievement
        if( in_array( $achievement->ID, $achievement_ids ) && ! gamipress_has_user_earned_achievement( $achievement->ID, $user_id ) ) {
            // Award the achievement to the user
            gamipress_award_achievement_to_user( $achievement->ID, $user_id );
        }
    }
}
add_action( 'gamipress_award_achievement', 'my_prefix_award_achievement_if_any_step_completed', 10, 2 );

Enabling OR requirements for ranks

There is a similar snippet to the previous one but focused to enable the “OR requirements” to a specific rank:

function my_prefix_award_rank_if_any_requirement_completed( $user_id = 0, $requirement_id = 0 ) {
    // Rank IDs you want to allow to be earned by completing just one of their requirements
    $rank_id = array( 123, 456, 789 );
    if( get_post_type( $requirement_id ) === 'rank-requirement' ) {
        $rank = gamipress_get_rank_requirement_rank( $requirement_id );
        // Check if user has not been already earned this rank
        if( in_array( $rank->ID, $rank_ids ) && ! gamipress_has_user_earned_rank( $rank->ID, $user_id ) ) {
            // Award the rank to the user
            gamipress_award_rank_to_user( $rank->ID, $user_id );
        }
    }
}
add_action( 'gamipress_award_achievement', 'my_prefix_award_rank_if_any_requirement_completed', 10, 2 );