Java tutorial
/* * Nextcloud Android client application * * @author Tobias Kaminsky * Copyright (C) 2018 Tobias Kaminsky * Copyright (C) 2018 Nextcloud GmbH. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ package com.owncloud.android.operations; import android.util.Log; import com.google.gson.GsonBuilder; import com.owncloud.android.lib.common.OwnCloudClient; import com.owncloud.android.lib.common.operations.RemoteOperationResult; import com.owncloud.android.operations.common.SyncOperation; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.methods.StringRequestEntity; import java.io.IOException; import java.util.HashMap; import java.util.Map; /** * Restore a {@link com.owncloud.android.lib.resources.files.FileVersion}. */ public class CommentFileOperation extends SyncOperation { private static final String TAG = CommentFileOperation.class.getSimpleName(); private static final int POST_READ_TIMEOUT = 30000; private static final int POST_CONNECTION_TIMEOUT = 5000; private static final String ACTOR_ID = "actorId"; private static final String ACTOR_TYPE = "actorType"; private static final String ACTOR_TYPE_VALUE = "users"; private static final String VERB = "verb"; private static final String VERB_VALUE = "comment"; private static final String MESSAGE = "message"; private String message; private String fileId; private String userId; /** * Constructor * * @param message Comment to store * @param userId userId to access correct dav endpoint */ public CommentFileOperation(String message, String fileId, String userId) { this.message = message; this.fileId = fileId; this.userId = userId; } /** * Performs the operation. * * @param client Client object to communicate with the remote ownCloud server. */ @Override protected RemoteOperationResult run(OwnCloudClient client) { RemoteOperationResult result; try { String url = client.getNewWebdavUri() + "/comments/files/" + fileId; PostMethod postMethod = new PostMethod(url); postMethod.addRequestHeader("Content-type", "application/json"); Map<String, String> values = new HashMap<>(); values.put(ACTOR_ID, userId); values.put(ACTOR_TYPE, ACTOR_TYPE_VALUE); values.put(VERB, VERB_VALUE); values.put(MESSAGE, message); String json = new GsonBuilder().create().toJson(values, Map.class); postMethod.setRequestEntity(new StringRequestEntity(json)); int status = client.executeMethod(postMethod, POST_READ_TIMEOUT, POST_CONNECTION_TIMEOUT); result = new RemoteOperationResult(isSuccess(status), postMethod); client.exhaustResponse(postMethod.getResponseBodyAsStream()); } catch (IOException e) { result = new RemoteOperationResult(e); Log.e(TAG, "Post comment to file with id " + fileId + " failed: " + result.getLogMessage(), e); } return result; } private boolean isSuccess(int status) { return status == HttpStatus.SC_CREATED; } }