permission directive

html:

export class PermissionService { public static permission_store_key = "permissions"; private static permissionCheckers: ((permission: string) => boolean)[]=[]; private static roleCheckers: ((permission: string, roles: string[]) => boolean)[]=[]; private static permissionStore: PermissionStore; private static roles: string[]; setPermissionStore(permissionStore: PermissionStore): void LoadPermissions(roles: string[]): void addRoleChecker(checker: (permission: string, roles: string[]) => boolean): void addPermissionChecker(checker: (permission: string) => boolean): void hasAccess(permission: string): boolean }

interface PermissionStore { LoadPermission(roles: string[]): Observable<string[]>; }