// Copyright (C) 2012 The Android Open Source Project
//
// 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.

package com.google.gerrit.server.project;

import com.google.common.base.Objects;
import com.google.common.base.Strings;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.DefaultInput;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.git.MetaDataUpdate;
import com.google.gerrit.server.git.ProjectConfig;
import com.google.gerrit.server.project.SetDescription.Input;
import com.google.inject.Inject;

import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;

class SetDescription implements RestModifyView<ProjectResource, Input> {
  static class Input {
    @DefaultInput
    String description;
    String commitMessage;
  }

  private final ProjectCache cache;
  private final MetaDataUpdate.Server updateFactory;

  @Inject
  SetDescription(ProjectCache cache, MetaDataUpdate.Server updateFactory) {
    this.cache = cache;
    this.updateFactory = updateFactory;
  }

  @Override
  public Class<Input> inputType() {
    return Input.class;
  }

  @Override
  public Object apply(ProjectResource resource, Input input)
      throws AuthException, BadRequestException, ResourceConflictException,
      Exception {
    if (input == null) {
      input = new Input(); // Delete would set description to null.
    }

    ProjectControl ctl = resource.getControl();
    IdentifiedUser user = (IdentifiedUser) ctl.getCurrentUser();
    if (!ctl.isOwner()) {
      throw new AuthException("not project owner");
    }

    try {
      MetaDataUpdate md = updateFactory.create(resource.getNameKey());
      try {
        ProjectConfig config = ProjectConfig.read(md);
        Project project = config.getProject();
        project.setDescription(Strings.emptyToNull(input.description));

        String msg = Objects.firstNonNull(
          Strings.emptyToNull(input.commitMessage),
          "Updated description.\n");
        if (!msg.endsWith("\n")) {
          msg += "\n";
        }
        md.setAuthor(user);
        md.setMessage(msg);
        config.commit(md);
        cache.evict(ctl.getProject());

        ListProjects.ProjectInfo info = new ListProjects.ProjectInfo();
        info.setName(resource.getName());
        info.parent = project.getParentName();
        info.description = project.getDescription();
        return info;
      } finally {
        md.close();
      }
    } catch (RepositoryNotFoundException notFound) {
      throw new ResourceNotFoundException(resource.getName());
    } catch (ConfigInvalidException e) {
      throw new ResourceConflictException(String.format(
          "invalid project.config: %s", e.getMessage()));
    }
  }
}

@@ -1205,16 +1205,74 @@
 edUser;%0A
+import com.google.gerrit.server.git.GitRepositoryManager;%0A
 import c
@@ -1835,16 +1835,61 @@
 Factory;
+%0A  private final GitRepositoryManager gitMgr;
 %0A%0A  @Inj
@@ -1928,16 +1928,22 @@
 e cache,
+%0A     
  MetaDat
@@ -1970,16 +1970,51 @@
 eFactory
+,%0A      GitRepositoryManager gitMgr
 ) %7B%0A    
@@ -2073,16 +2073,42 @@
 actory;%0A
+    this.gitMgr = gitMgr;%0A
   %7D%0A%0A  @
@@ -3235,16 +3235,128 @@
 ject());
+%0A        gitMgr.setProjectDescription(%0A            resource.getNameKey(),%0A            project.getDescription());
 %0A%0A      

Update description file in Git