class-o-mat/src/methods/field-functions.js

ALPHA VERSION ONLY: class-o-mats will help to create getter-setter functionality with validations that can be attached to a container class for easier coding. Some basic validations are included. class-o-mats also has the ability to store params as bloc

import Bunyan from 'bunyan';
const  log = Bunyan.createLogger({name: "field-functions"});

import { NONE } from '../constants/types';


const paramSetter =({isStack, isQueue})=>{ 
  if (isStack === false && isQueue === false) { 
    return (ts, params, key, value)=>params[key] = value;
  }

  if (isStack === true) { 
    return (ts, params, key, value)=>{ 
      params[key].push(value);
    }
  }

  return (ts, params, key, value)=>params[key].unshift(value);
}

const getter =(opt)=>(ts, params, key)=>params[key];

const setter =(opt)=>paramSetter(opt);
        
const getterSetter =(opt)=>{ 
    const setter = paramSetter(opt);

    return (ts, params, key, value=NONE)=>{ 
      if (value === NONE) return params[key];

      setter(ts, params, key, value);
      return ts;
    }
}

const getterSetterSafe =(opt)=>{ 
    const setter = paramSetter(opt);

    return (ts, params, key, value=NONE, safe=NONE)=> { 
      if (value === NONE) { 
        if (safe === NONE) return params[key];

        if (safe === false) { 
          throw new Error(`Null parameter set for ${key}.`);
        }

        if (safe === true) { 
          return ts;
        }
      }

      setter(ts, params, key, value);
      return ts;
    }
}

const toggler =(opt)=>(ts, params, key)=>{ 
      const v = params[key];
      params[key] = (v === true ) ? false : true;
      return ts;
    }

const swapper =(opt)=>(ts, params, key, value=NONE)=>{ 
      if (value === NONE) return params[key];

      const v = params[key];
      params[key] = value;
      return v;
    }

const staticSetter =({staticValue})=>
        (ts, params, key)=>{ 
          params[key] = staticValue;
          return ts;
        }

export { 
  getter,
  setter,
  getterSetter,
  getterSetterSafe,
  staticSetter,
  toggler,
  swapper
}