ModelAction.js

class Action {
  constructor(type = '', model = '') {
    this.type = ` ${type.toUpperCase().replace(' ', '_')}_`;
    this.model = model;
    this.modelString = `[${model}]`;
    this.upperModel = this.model.toUpperCase();
    
    this.request = this.modelString + 
      this.type +this.model.toUpperCase();
    this.success = this.modelString + 
      this.type +this.model.toUpperCase()+'_SUCCESS';
    this.failure = this.modelString + 
      this.type +this.model.toUpperCase() + '_FAILURE';
  }
}

class ModelAction {

  constructor(model) {
    this.model = model;
    this.create = new Action('create', this.model);
    this.read = new Action('get', this.model);
    this.update = new Action('update', this.model);
    this.remove = new Action('remove', this.model);
  }


}

class CustomModelAction extends ModelAction{
  constructor(model) {
    super(model);
    
    this.startEdit = new Action('start edit', this.model);
  }
    
}


const actions = [new ModelAction('Todo'), new ModelAction('Song'), new ModelAction('Event'), new CustomModelAction('User') ];

console.log(actions);