polygerrit-ui/app/utils/router-util.ts

/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import {getBaseUrl} from './url-util';
import {assertNever} from './common-util';
import {GerritView} from '../services/router/router-model';
import {createEditUrl, EditViewState} from '../models/views/edit';
import {createDiffUrl, DiffViewState} from '../models/views/diff';
import {ChangeViewState, createChangeUrl} from '../models/views/change';

export type GenerateUrlParameters =
  | ChangeViewState
  | EditViewState
  | DiffViewState;

export function isChangeViewState(
  x: GenerateUrlParameters
): x is ChangeViewState {
  return x.view === GerritView.CHANGE;
}

export function isEditViewState(x: GenerateUrlParameters): x is EditViewState {
  return x.view === GerritView.EDIT;
}

export function isDiffViewState(x: GenerateUrlParameters): x is DiffViewState {
  return x.view === GerritView.DIFF;
}

export function rootUrl() {
  return `${getBaseUrl()}/`;
}

export function generateUrl(params: GenerateUrlParameters) {
  const base = getBaseUrl();
  let url = '';

  if (params.view === GerritView.CHANGE) {
    url = createChangeUrl(params);
  } else if (params.view === GerritView.DIFF) {
    url = createDiffUrl(params);
  } else if (params.view === GerritView.EDIT) {
    url = createEditUrl(params);
  } else {
    assertNever(params, "Can't generate");
  }

  return base + url;
}