Alert: This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

LLMS_Generator::handle_prerequisites()

Updates course and lesson prerequisites If the prerequisite was included in the import, updates to the new imported version If the prereq is not included but the source matches, leaves the prereq intact as long as the prereq exists Otherwise removes prerequisite data from the new course / lesson


Description Description

Removes prereq track associations if there’s no source or source doesn’t match or if the track doesn’t exist


Return Return

(void)


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Source Source

File: includes/class.llms.generator.php

	private function handle_prerequisites() {

		foreach ( array( 'course', 'lesson' ) as $obj_type ) {

			$ids = $this->tempids[ $obj_type ];

			// courses have two kinds of prereqs
			$has_prereq_param = ( 'course' === $obj_type ) ? 'course' : null;

			// loop through all then created lessons
			foreach ( $ids as $old_id => $new_id ) {

				// instantiate the new instance of the object
				$obj = llms_get_post( $new_id );

				// if this is a course and there isn't a source or the source doesn't match the current site
				// we should remove the track prerequisites
				if ( 'course' === $obj_type && ( ! isset( $raw['_source'] ) || get_site_url() !== $raw['_source'] ) ) {

					// remove prereq track settings
					if ( $obj->has_prerequisite( 'course_track' ) ) {
						$obj->set( 'prerequisite_track', 0 );
						if ( ! $obj->has_prerequisite( 'course' ) ) {
							$obj->set( 'has_prerequisite', 'no' );
						}
					}
				}

				// if the object has a prereq
				if ( $obj->has_prerequisite( $has_prereq_param ) ) {

					// get the old preqeq's id
					$old_prereq = $obj->get( 'prerequisite' );

					// if the old prereq is a key in the array of created objects
					// we can replace it with the new id
					if ( in_array( $old_prereq, array_keys( $ids ) ) ) {

						$obj->set( 'prerequisite', $ids[ $old_prereq ] );

					} // End if().
					elseif ( ! isset( $raw['_source'] ) || get_site_url() !== $raw['_source'] ) {

						$obj->set( 'has_prerequisite', 'no' );
						$obj->set( 'prerequisite', 0 );

					} // check to be sure old prereq still exists
					else {
						$post = get_post( $old_prereq );
						// post doesn't exist or the post type doesn't match, get rid of it...
						if ( ! $post || $obj_type !== $post->post_type ) {

							$obj->set( 'has_prerequisite', 'no' );
							$obj->set( 'prerequisite', 0 );

						}
					}
				}
			}// End foreach().
		}// End foreach().

	}

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Version Description
3.3.0 Introduced.


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