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package de.thedevstack.conversationsplus.services.filetransfer;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;
import de.thedevstack.android.logcat.Logging;
import de.thedevstack.conversationsplus.Config;
import de.thedevstack.conversationsplus.entities.Message;
import de.thedevstack.conversationsplus.services.FileTransferService;
/**
*
*/
public class FileTransferManager implements FileTransferService {
private SortedSet<WeightedTransferService> transferServices;
private static final FileTransferManager INSTANCE = new FileTransferManager();
private FileTransferManager() {
this.transferServices = new TreeSet<>();
}
public static FileTransferManager getInstance() {
return INSTANCE;
}
public static void init(FileTransferService... fileTransferServices) {
if (null != fileTransferServices && fileTransferServices.length > 0) {
for (FileTransferService fts : fileTransferServices) {
addFileTransferService(fts);
}
}
}
public static void init(HashMap<Integer, FileTransferService> fileTransferServices) {
for (Map.Entry<Integer, FileTransferService> entry : fileTransferServices.entrySet()) {
addFileTransferService(entry.getKey(), entry.getValue());
}
}
public static void addFileTransferService(int weight, FileTransferService fts) {
INSTANCE.transferServices.add(new WeightedTransferService(weight, fts));
}
public static void addFileTransferService(FileTransferService fts) {
int weight = 1;
if (!INSTANCE.transferServices.isEmpty()) {
weight = INSTANCE.transferServices.last().weight + 1;
}
addFileTransferService(weight, fts);
}
/**
* Transfers a file for the corresponding message.
*
* @param message the message containing the file to transfer
* @return <code>true</code> if the file transfer was successful, <code>false</code> otherwise
*/
public boolean transferFile(Message message) {
return this.transferFile(message, false);
}
/**
* Transfers a file for the corresponding message.
*
* @param message the message containing the file to transfer
* @param delay whether the message is delayed or not
* @return <code>true</code> if the file transfer was successful, <code>false</code> otherwise
*/
@Override
public boolean transferFile(Message message, boolean delay) {
Logging.d(Config.LOGTAG, "send file message");
boolean transferSuccessfullyStarted = false;
for (WeightedTransferService wts : this.transferServices) {
try {
if (wts.fileTransferService.accept(message)) {
transferSuccessfullyStarted = wts.fileTransferService.transferFile(message, delay);
if (transferSuccessfullyStarted) {
break;
}
}
} catch (Exception e) {
//TODO Do real exception handling!!!!!
}
}
return transferSuccessfullyStarted;
}
/**
* Checks whether a message can be sent using this service or not.
*
* @param message the message to be checked
* @return <code>true</code> if the message can be processed, <code>false</code> otherwise
*/
@Override
public boolean accept(Message message) {
return message.needsUploading();
}
static class WeightedTransferService implements Comparable<WeightedTransferService> {
int weight;
FileTransferService fileTransferService;
WeightedTransferService(int weight, FileTransferService service) {
this.weight = weight;
this.fileTransferService = service;
}
/**
* Compares this object to the specified object to determine their relative
* order.
*
* @param another the object to compare to this instance.
* @return a negative integer if this instance is less than {@code another};
* a positive integer if this instance is greater than
* {@code another}; 0 if this instance has the same order as
* {@code another}.
* @throws ClassCastException if {@code another} cannot be converted into something
* comparable to {@code this} instance.
*/
@Override
public int compareTo(WeightedTransferService another) {
return this.weight - another.weight;
}
}
}
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