/**
* Get a item backup file preserved in the cloud.
*
* @param context context DSpace
* @param ref ID of the item
* @param establishConnection true if pretend establish connection to cloud
* @return true if file correctly sent to cloud, or false if not
*/
public Boolean getItem(Context context, Integer ref, Boolean establishConnection) {
DSpaceObject obj = this.getDSpaceObject(context, Constants.ITEM, ref);
// if Object DSpace doesn't exist, return false
if (obj == null) return false;
// if just one file to get make connection with cloud
if (establishConnection == true) {
this.makeConnection();
this.filesInCloud.putAll(this.newCloudConnection.getInfoFilesIn(Constants.ITEM));
}
// see if it is possible and necessary get community backup from cloud
Boolean var = this.couldGetFileFromCloud(context, ref, Constants.ITEM);
if (var == false) {
// if just one file to send close connection with cloud
if (establishConnection == true) this.closeConnection();
return false;
}
// get file name of the community backup
Backup backup = new Backup();
String filename = backup.getFileNameObj(obj);
// get file from cloud
Boolean result = this.getFileFromCloud(filename);
// if just one file to send close connection with cloud
if (establishConnection == true) this.closeConnection();
return result;
}
/**
* See if is necessary and possible to get the backup file from cloud.
*
* @param context DSpace context
* @param ref ID of the object
* @param type type of the object DSpace
* @return true if it is necessary or possible to get the backup from cloud or false if not
*/
private Boolean couldGetFileFromCloud(Context context, int ref, int type) {
// get the corresponding Dspace Object
DSpaceObject obj = this.getDSpaceObject(context, type, ref);
// if Object DSpace doesn't exist, return false
if (obj == null) return false;
// see if backup file exists in cloud, if not return false
if (this.filesInCloud.containsKey(obj.getHandle())) {
BackupProcess backupPro = new BackupProcess();
String ETagSaved = backupPro.getETag(context, obj.getHandle());
// see if ETag of file in cloud, has equal to the last send, if not return false
if (ETagSaved.compareTo(this.filesInCloud.get(obj.getHandle())) == 0) {
// see if exists backup file locally
Backup backup = new Backup();
String filename = backup.getFileNameObj(obj);
Boolean existLocalFile = backup.existFile(filename);
// if not exist file locally return true
if (existLocalFile == true) {
// get MD5 of local file
String md5LocalFile = backup.getMD5File(filename);
// get MD5 of the last file sent to cloud
String md5FileSentCloud = backupPro.getSentMD5(context, obj.getHandle());
// if files equal, there is no necessity to get file from cloud, then return false
if (md5LocalFile.compareTo(md5FileSentCloud) == 0) return false;
else return true;
} else return true;
} else return false;
} else return false;
}
/**
* Send a community backup file to cloud to be preserved.
*
* @param context context DSpace
* @param ref ID of the community
* @param establishConnection true if pretend establish connection to cloud
* @return true if file correctly sent to cloud, or false if not
*/
public Boolean sendCommunity(Context context, Integer ref, Boolean establishConnection) {
// get Dspace Object to the respective community
DSpaceObject obj = this.getDSpaceObject(context, Constants.COMMUNITY, ref);
// if Object DSpace doesn't exist, return false
if (obj == null) return false;
// if connection not maked
if (establishConnection == true) {
this.makeConnection();
this.filesInCloud.putAll(this.newCloudConnection.getInfoFilesIn(Constants.COMMUNITY));
}
// see if last backup has sent to cloud
Boolean var = this.sendDone(context, ref, Constants.COMMUNITY);
if (var == true) {
// if just one file to send close connection with cloud
if (establishConnection == true) this.closeConnection();
return false;
}
Backup backup = new Backup();
// see if backup exists and is correct
Boolean statBackup = backup.backupDone(context, ref, Constants.COMMUNITY);
// if backup doesn't exist, do it
Boolean statOperation = false;
if (statBackup == false) statOperation = backup.exportCommunity(context, ref);
else statOperation = true;
// if backup operation fails, return false
if (statOperation == false) {
// if just one file to send close connection with cloud
if (establishConnection == true) this.closeConnection();
return false;
}
// get file name of the community backup
String filename = backup.getFileNameObj(obj);
// send file to cloud
Boolean result = this.sendFileToCloud(context, filename);
// if just one file to send close connection with cloud
if (establishConnection == true) this.closeConnection();
return result;
}