libpiggy/lib/create-notify-function.js

Use a PostgreSQL database like a JSON document store.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _asyncToGenerator2 = require("babel-runtime/helpers/asyncToGenerator");

var _asyncToGenerator3 = _interopRequireDefault(_asyncToGenerator2);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const createNotifyFunction = (() => {
  var _ref = (0, _asyncToGenerator3.default)(function* ({ client, key }) {
    try {
      const text = `
      CREATE OR REPLACE FUNCTION notify_trigger()
      RETURNS TRIGGER AS
      $body$
      DECLARE
      BEGIN
        IF (TG_OP = 'INSERT') THEN
          PERFORM pg_notify('watchers', 'table=' || TG_TABLE_NAME || '&when=' || TG_WHEN || '&newkey=' || NEW.${key});
          RETURN NEW;
        ELSIF (TG_OP = 'DELETE') THEN
          PERFORM pg_notify('watchers', 'table=' || TG_TABLE_NAME || '&when=' || TG_WHEN || '&oldkey=' || OLD.${key});
          RETURN OLD;
        ELSIF (TG_OP = 'UPDATE') THEN
          PERFORM pg_notify('watchers', 'table=' || TG_TABLE_NAME || '&when=' || TG_WHEN || '&newkey=' || NEW.${key} || '&oldkey=' || OLD.${key});
          RETURN NEW;
        END IF;
      END;
      $body$
      LANGUAGE plpgsql;
    `;

      const results = yield client.query({ text });

      return {
        client,
        results
      };
    } catch (error) {
      throw error;
    }
  });

  return function createNotifyFunction(_x) {
    return _ref.apply(this, arguments);
  };
})();

exports.default = createNotifyFunction;