join-monster/dist/alias-namespace.js

A GraphQL to SQL query execution layer for batch data fetching.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _generatorics = _interopRequireDefault(require("generatorics"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
class AliasNamespace {
  constructor(minify, aliasPrefix) {
    this.minify = !!minify;
    this.aliasPrefix = aliasPrefix ?? '';
    this.mininym = _generatorics.default.baseNAll('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ#$');
    this.usedTableAliases = new Set();
    this.columnAssignments = {};
  }
  generate(type, name) {
    if (this.minify) {
      if (type === 'table') {
        return `${this.aliasPrefix}${this.mininym.next().value.join('')}`;
      }
      if (!this.columnAssignments[name]) {
        this.columnAssignments[name] = this.mininym.next().value.join('');
      }
      return this.columnAssignments[name];
    }
    if (type === 'column') {
      return name;
    }
    name = this.aliasPrefix + name.replace(/\s+/g, '').replace(/[^a-zA-Z0-9]/g, '_').slice(0, 10);
    while (this.usedTableAliases.has(name)) {
      name += '$';
    }
    this.usedTableAliases.add(name);
    return name;
  }
}
exports.default = AliasNamespace;