ddb-table/lib/expressions/ExpressionAttributeNames.js

Strongly typed library for querying and modeling DynamoDB documents.

"use strict";

exports.__esModule = true;
exports.default = void 0;
var _ExpressionAttributes = _interopRequireDefault(require("./ExpressionAttributes"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
class ExpressionAttributeNames extends _ExpressionAttributes.default {
  static escape(name) {
    return `#${name.replace(/[^\w_]/, '')}`;
  }
  add(...path) {
    let res = '';
    for (const key of path) {
      if (res && typeof key === 'number') {
        res += `[${key}]`;
        continue;
      }
      const keyStr = String(key);
      const escapedName = ExpressionAttributeNames.escape(keyStr);
      const name = this.setValue(escapedName, keyStr);
      res = res ? `${res}.${name}` : name;
    }
    return res;
  }
}
exports.default = ExpressionAttributeNames;
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