urce` parameter for adb-addon.install"
      );
    }

    const addon = await this._getAddon();
    if (addon && !addon.userDisabled) {
      this.status = ADB_ADDON_STATES.INSTALLED;
      return;
    }
    this.status = ADB_ADDON_STATES.PREPARING;
    if (addon?.userDisabled) {
      await addon.enable();
    } else {
      const install = await AddonManager.getInstallForURL(this._getXpiLink(), {
        telemetryInfo: { source },
      });
      install.addListener(this);
      install.install();
    }
  }

  async uninstall() {
    const addon = await this._getAddon();
    addon.uninstall();
  }

  installFailureHandler(install, message) {
    this.status = ADB_ADDON_STATES.UNINSTALLED;
    this.emit("failure", message);
  }

  // Expected AddonManager install listener.
  onDownloadStarted() {
    this.status = ADB_ADDON_STATES.DOWNLOADING;
  }

  // Expected AddonManager install listener.
  onDownloadProgress(install) {
    if (install.maxProgress == -1) {
      this.emit("progress", -1);
    } else {
      this.emit("progress", install.progress / install.maxProgress);
    }
  }

  // Expected AddonManager install listener.
  onDownloadCancelled(install) {
    this.installFailureHandler(install, "Download cancelled");
  }

  // Expected AddonManager install listener.
  onDownloadFailed(install) {
    this.installFailureHandler(install, "Download failed");
  }

  // Expected AddonManager install listener.
  onInstallStarted() {
    this.status = ADB_ADDON_STATES.INSTALLING;
  }

  // Expected AddonManager install listener.
  onInstallCancelled(install) {
    this.installFailureHandler(install, "Install cancelled");
  }

  // Expected AddonManager install listener.
  onInstallFailed(install) {
    this.installFailureHandler(install, "Install failed");
  }

  // Expected AddonManager install listener.
  onInstallEnded({ addon }) {
    addon.enable();
  }
}

exports.adbAddon = new ADBAddon();
PK