GlossyModelGenerator for swift

GlossyModelGenerator.es6

glossGenerator("CLChatFile", {
  id: "Int64",
  regDate: "Date",
  ownerId: "Int64?",
  filename: "String",
  mimeType: "String",
  length: "Int64",
  md5: "String"
})

function glossGenerator(className, fields) {
  
  var res = "class " + className + ": Glossy {\n\n";
  
  let keys = Object.keys(fields);
  
  let ctor = "\trequired init?(json: JSON) {\n";
  
  let hasGuard = false;
  
  let guarded = [];
  
  let guardedExpr = "";
  let notGuardedExpr = "";
  
  keys.map(function (key) {
    let type = fields[key];
    res += "\tlet " + key + ": " + type + "\n";
    if (!type.endsWith("?")) {
      if (!hasGuard) {
        guardedExpr += '\t\tguard '
        hasGuard = true;
      } else {
        guardedExpr += ',\n\t\t\t';
      }
      guardedExpr += 'let ' + key + ': ' + type + ' = "' + key + '" <~~ json'
      guarded.push(key);
      
      notGuardedExpr += "\t\tself." + key + " = " + key + "\n";
    } else {
      notGuardedExpr += "\t\tself." + key + " = " + '("' + key + '" <~~ json)' + "\n";
    }
  });
  
  ctor += guardedExpr + "\n\t\telse {\n\t\t\treturn nil\n\t\t}\n";
  ctor += notGuardedExpr;
  ctor += "\n\t}\n\n";
  
  res += "\n" + ctor;
  
  res += "\tfunc toJSON() -> JSON? {\n";
  res += "\t\treturn jsonify([\n"
  
  keys.map(function (key) {
    res += '\t\t\t"' + key + '" ~~> self.' + key + ',\n'
  });
  
  res += "\t\t])\n\t}\n\n"
  
  res += "}"
  console.log(res)
  
}