[Restrict access to custom posts based on role] #wp

restrict-access.php

//create a new role

function psp_add_project_management_role() {
 add_role('psp_project_manager',
            'Project Manager',
            array(
                'read' => true,
                'edit_posts' => false,
                'delete_posts' => false,
                'publish_posts' => false,
                'upload_files' => true,
            )
        );
}
register_activation_hook( __FILE__, 'psp_add_project_management_role' );

//map capabilities
add_action( 'init', 'psp_register_cpt_projects');
function psp_register_cpt_projects() {
     		$args = array(
			'label'               => __( 'psp_projects', 'psp_projects' ),
			'description'         => __( 'Projects', 'psp_projects' ),
			'labels'              => $labels,
			'supports'            => array( 'title', 'comments', 'revisions', ),
			'hierarchical'        => false,
			'public'              => true,
			'show_ui'             => true,
			'rewrite'             => $rewrite,
                        'capability_type'     => array('psp_project','psp_projects'),
                        'map_meta_cap'        => true,
		);
		register_post_type( 'psp_projects', $args );
}

//add custom capabilities for the role

add_action('admin_init','psp_add_role_caps',999);
function psp_add_role_caps() {

  // Add the roles you'd like to administer the custom post types
  $roles = array('psp_project_manager','editor','administrator');

  // Loop through each role and assign capabilities
  foreach($roles as $the_role) { 

    $role = get_role($the_role);

    $role->add_cap( 'read' );
    $role->add_cap( 'read_psp_project');
    $role->add_cap( 'read_private_psp_projects' );
    $role->add_cap( 'edit_psp_project' );
    $role->add_cap( 'edit_psp_projects' );
    $role->add_cap( 'edit_others_psp_projects' );
    $role->add_cap( 'edit_published_psp_projects' );
    $role->add_cap( 'publish_psp_projects' );
    $role->add_cap( 'delete_others_psp_projects' );
    $role->add_cap( 'delete_private_psp_projects' );
    $role->add_cap( 'delete_published_psp_projects' );

  }
}