Jobhunt - Create Custom Fields Based on Job Package

functions.php

if ( ! function_exists( 'jobhunt_child_custom_submit_job_form_package_id_field' ) ) {
    function jobhunt_child_custom_submit_job_form_package_id_field () {
        $job_id = ! empty( $_REQUEST['job_id'] ) ? absint( $_REQUEST['job_id'] ) : 0;
        if( ! empty( $job_id ) && $job_id > 0 && ! empty( get_post_meta( $job_id, '_package_id', true ) ) ) {
            $package_id = get_post_meta( $job_id, '_package_id', true );
        } else {
            $package_id = WP_Job_Manager_WCPL_Submit_Job_Form::get_package_id();
        }
        ?><input type="hidden" name="_package_id" value="<?php echo esc_attr( $package_id ); ?>" /><?php
    }
}
add_action( 'submit_job_form_job_fields_end' , 'jobhunt_child_custom_submit_job_form_package_id_field', 20 );

if ( ! function_exists( 'jobhunt_child_custom_save_submit_job_form_package_id_field' ) ) {
    function jobhunt_child_custom_save_submit_job_form_package_id_field( $job_id ) {
        $package_id = isset( $_POST['_package_id'] ) ? jobhunt_clean( $_POST['_package_id'] ) : '';
        update_post_meta( $job_id, '_package_id', $package_id );
    }
}
add_action( 'save_post', 'jobhunt_child_custom_save_submit_job_form_package_id_field', 20 );

if ( ! function_exists( 'jobhunt_child_custom_submit_job_form_fields' ) ) {
    function jobhunt_child_custom_submit_job_form_fields ($fields) {
        if ( class_exists( 'WC_Paid_Listings' ) ) {
            $job_id = ! empty( $_REQUEST['job_id'] ) ? absint( $_REQUEST['job_id'] ) : 0;
            if( ! empty( $job_id ) && $job_id > 0 ) {
                $package_id = get_post_meta( $job_id, '_package_id', true );
            } else {
                $package_id = WP_Job_Manager_WCPL_Submit_Job_Form::get_package_id();
            }
            $package = wc_get_product( $package_id );

            if ( ! is_object( $package ) ) {
                $fields['job']['job_exclusive_field'] = array(
                    'label'         => esc_html__( 'Exclusive Field', 'jobhunt' ),
                    'type'          => 'text',
                    'placeholder'   => 'Add Exclusive Text',
                    'priority'      => 1,
                    'required'      => false
                );
            } else {
                $package_slug = $package->get_slug();
                if ( $package_slug == 'standard-jobs' ) {
                    $fields['job']['job_exclusive_field'] = array(
                        'label'         => esc_html__( 'Exclusive Field', 'jobhunt' ),
                        'type'          => 'text',
                        'placeholder'   => 'Add Exclusive Text',
                        'priority'      => 1,
                        'required'      => false
                    );
                } else {
                    unset( $fields['job']['job_exclusive_field'] );
                }
            }
        }
        return $fields;
    }
}
add_filter( 'submit_job_form_fields' , 'jobhunt_child_custom_submit_job_form_fields', 30 );

if ( ! function_exists( 'jobhunt_child_custom_job_manager_job_fields' ) ) {
    function jobhunt_child_custom_job_manager_job_fields ($fields) {
        $fields['_job_exclusive_field'] = array(
            'label'         => esc_html__( 'Exclusive Field', 'jobhunt' ),
            'placeholder'   => 'Add Exclusive Text',
            'type'          => 'text'
        );
        return $fields;
    }
}
add_filter( 'job_manager_job_listing_data_fields' , 'jobhunt_child_custom_job_manager_job_fields', 30 );