@wordpress/core-data/build/locks/engine.js

Access to and manipulation of core WordPress entities.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = createLocks;
var _reducer = _interopRequireDefault(require("./reducer"));
var _selectors = require("./selectors");
/**
 * Internal dependencies
 */

function createLocks() {
  let state = (0, _reducer.default)(undefined, {
    type: '@@INIT'
  });
  function processPendingLockRequests() {
    for (const request of (0, _selectors.getPendingLockRequests)(state)) {
      const {
        store,
        path,
        exclusive,
        notifyAcquired
      } = request;
      if ((0, _selectors.isLockAvailable)(state, store, path, {
        exclusive
      })) {
        const lock = {
          store,
          path,
          exclusive
        };
        state = (0, _reducer.default)(state, {
          type: 'GRANT_LOCK_REQUEST',
          lock,
          request
        });
        notifyAcquired(lock);
      }
    }
  }
  function acquire(store, path, exclusive) {
    return new Promise(resolve => {
      state = (0, _reducer.default)(state, {
        type: 'ENQUEUE_LOCK_REQUEST',
        request: {
          store,
          path,
          exclusive,
          notifyAcquired: resolve
        }
      });
      processPendingLockRequests();
    });
  }
  function release(lock) {
    state = (0, _reducer.default)(state, {
      type: 'RELEASE_LOCK',
      lock
    });
    processPendingLockRequests();
  }
  return {
    acquire,
    release
  };
}
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