# All files / functions delete-installation.ts

100% Statements 18/18
92.31% Branches 12/13
100% Functions 2/2
100% Lines 17/17

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     /**
     * @license
     * Copyright 2019 Google LLC
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

    import { deleteInstallationRequest } from '../api/delete-installation-request';
    import { remove, update } from '../helpers/idb-manager';
    import { FirebaseDependencies } from '../interfaces/firebase-dependencies';
    import { RequestStatus } from '../interfaces/installation-entry';
    import { ERROR_FACTORY, ErrorCode } from '../util/errors';

    export async function deleteInstallation(
      dependencies: FirebaseDependencies
    ): Promise<void> {
      const { appConfig } = dependencies;

      const entry = await update(appConfig, oldEntry => {
        if (oldEntry && oldEntry.registrationStatus === RequestStatus.NOT_STARTED) {
          // Delete the unregistered entry without sending a deleteInstallation request.
          return undefined;
        }
        return oldEntry;
      });

      if (entry) {
        if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {
          // Can't delete while trying to register.
          throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);
        } else if (Ientry.registrationStatus === RequestStatus.COMPLETED) {
          if (!navigator.onLine) {
            throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);
          } else {
            await deleteInstallationRequest(appConfig, entry);
            await remove(appConfig);
          }
        }
      }
    }