class SubjectParser
{
  static create = () => new this();


  parse(subject)
  {
    // Possible formats: 
    //   Title
    //   |id| Title
    //   |id-sound| Title
    //   |-sound| Title
    const match = subject.match(/^(?:\|([^,]*?)(?:-(.+?)){0,1}\|){0,1}\s*(.+?)$/m);

    if (match == null)
      return { 
        id: subject,
        sound: null,
        title: subject 
      };

    return {
      id: match[1] || match[3],
      sound: match[2] || null,
      title: match[3]    
    };
  };
}


module.exports = SubjectParser;