/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
    
package sonia.scm.api.v2.resources;

import de.otto.edison.hal.Links;
import sonia.scm.security.PermissionDescriptor;
import sonia.scm.security.PermissionPermissions;

import javax.inject.Inject;
import java.util.Collection;

import static de.otto.edison.hal.Link.link;
import static de.otto.edison.hal.Links.linkingTo;

public class PermissionCollectionToDtoMapper {

  private final ResourceLinks resourceLinks;

  @Inject
  public PermissionCollectionToDtoMapper(ResourceLinks resourceLinks) {
    this.resourceLinks = resourceLinks;
  }

  public PermissionListDto mapForUser(Collection<PermissionDescriptor> permissions, String userId) {
    return map(permissions, userId, resourceLinks.userPermissions());
  }

  public PermissionListDto mapForGroup(Collection<PermissionDescriptor> permissions, String groupId) {
    return map(permissions, groupId, resourceLinks.groupPermissions());
  }

  private PermissionListDto map(Collection<PermissionDescriptor> permissions, String id, ResourceLinks.WithPermissionLinks links) {
    String[] permissionStrings = permissions
      .stream()
      .map(PermissionDescriptor::getValue)
      .toArray(String[]::new);
    PermissionListDto target = new PermissionListDto(permissionStrings);

    Links.Builder linksBuilder = linkingTo().self(links.permissions(id));

    if (PermissionPermissions.assign().isPermitted()) {
      linksBuilder.single(link("overwrite", links.overwritePermissions(id)));
    }

    target.add(linksBuilder.build());

    return target;
  }
}
