gecko-dev/toolkit/components/satchel/FormHistoryStartup.sys.mjs

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

const lazy = {};

ChromeUtils.defineESModuleGetters(lazy, {
  FormHistory: "resource://gre/modules/FormHistory.sys.mjs",
});

export function FormHistoryStartup() {}

FormHistoryStartup.prototype = {
  classID: Components.ID("{3A0012EB-007F-4BB8-AA81-A07385F77A25}"),

  QueryInterface: ChromeUtils.generateQI([
    "nsIObserver",
    "nsISupportsWeakReference",
  ]),

  observe(subject, topic, data) {
    switch (topic) {
      case "idle-daily":
      case "formhistory-expire-now":
        lazy.FormHistory.expireOldEntries().catch(console.error);
        break;
      case "profile-after-change":
        this.init();
        break;
    }
  },

  inited: false,

  init() {
    if (this.inited) {
      return;
    }
    this.inited = true;

    // triggers needed service cleanup and db shutdown
    Services.obs.addObserver(this, "idle-daily", true);
    Services.obs.addObserver(this, "formhistory-expire-now", true);

    Services.ppmm.addMessageListener(
      "FormHistory:AutoCompleteSearchAsync",
      this
    );
    Services.ppmm.addMessageListener("FormHistory:RemoveEntry", this);
  },

  receiveMessage(message) {
    switch (message.name) {
      case "FormHistory:AutoCompleteSearchAsync": {
        // This case is only used for the search field. There is a
        // similar algorithm in FormHistoryParent.jsm that uses
        // sendQuery for other form fields.

        let { id, searchString, params } = message.data;

        let instance = (this._queryInstance = {});
        lazy.FormHistory.getAutoCompleteResults(
          searchString,
          params,
          (row, cancel) => {
            if (this._queryInstance != instance) {
              cancel();
            }
          }
        ).then(results => {
          if (this._queryInstance == instance) {
            message.target.sendAsyncMessage(
              "FormHistory:AutoCompleteSearchResults",
              {
                id,
                results,
              }
            );
          }
        });
        break;
      }

      case "FormHistory:RemoveEntry": {
        let { inputName, value, guid } = message.data;
        lazy.FormHistory.update({
          op: "remove",
          fieldname: inputName,
          value,
          guid,
        });
        break;
      }
    }
  },
};