Type checking locations

type_check_locations.js

function isValidString(str) {
  return str && typeof str === "string";
}

function isValidColor(color) {
  let re = /^#[a-zA-Z0-9]{6}$/;  
  return isValidString(color) && re.test(color);
}

const TYPE_MAP = {
  "string": isValidString,
  "color": isValidColor
};

function validate(item, schema, ctx = {}) {
  let valid = true;
  
  for (let key of Object.keys(item)) {
    let type = schema[key];
    let isValid = TYPE_MAP[type];
    if (typeof isValid === "function") {
      if (!isValid(item[key])) {
        console.error(`Item failed validation at key '${key}' with value ${item[key]}, should be type ${type}`, ctx);
        valid = false;
      }
    } else {
      console.error(`Non-existent type given for item with at key '${key}'`, ctx);
    }
  }

  return valid;
}

const LOCATION_SCHEMA = {
  "Name of Organization": "string",
  "color": "color"
}

let rawLocations = [
  {
    "Name of Organization": "",
    "color": "#ffffff" 
  }, 
  {
    "Name of Organization": "An organization",
    "color": "#red" 
  }
]

let validLocations = rawLocations.filter((loc, i) => validate(loc, LOCATION_SCHEMA, { sheetRow: i + 1 }));

Running this should output:

Item failed validation at key 'Name of Organization' with value , should be type string { sheetRow: 1 }
Item failed validation at key 'color' with value #red, should be type color { sheetRow: 2 }