🔀 Merge remote-tracking branch 'origin/master'

diff --combined src/main/java/net/pterodactylus/xdcc/core/Core.java
index 8bc923f,db64416..8ef074c
--- 1/src/main/java/net/pterodactylus/xdcc/core/Core.java
--- 2/src/main/java/net/pterodactylus/xdcc/core/Core.java
+++ b/src/main/java/net/pterodactylus/xdcc/core/Core.java
@@@ -18,10 -18,12 +18,11 @@@
  package net.pterodactylus.xdcc.core;
  
  import static java.lang.String.format;
+ import static java.util.stream.Collectors.toSet;
  import static net.pterodactylus.irc.event.ChannelNotJoined.Reason.banned;
  import static net.pterodactylus.irc.event.ChannelNotJoined.Reason.inviteOnly;
  import static net.pterodactylus.irc.event.ChannelNotJoined.Reason.registeredNicknamesOnly;
  import static net.pterodactylus.irc.util.MessageCleaner.getDefaultInstance;
 -import static net.pterodactylus.xdcc.data.Channel.TO_NETWORK;
  import static net.pterodactylus.xdcc.data.Download.FILTER_RUNNING;
  
  import java.io.File;
@@@ -185,7 -187,7 +186,7 @@@ public class Core extends AbstractExecu
         * @return All defined networks
         */
        public Collection<Network> networks() {
 -              return FluentIterable.from(channels).transform(TO_NETWORK).toSet();
 +              return FluentIterable.from(channels).transform(Channel::network).toSet();
        }
  
        /**
@@@ -410,7 -412,7 +411,7 @@@
                                        .map(Channel::network)
                                        .distinct()
                                        .filter((network) -> !networkConnections.containsKey(network))
-                                       .collect(Collectors.toSet());
+                                       .collect(toSet());
  
                        if (missingNetworks.isEmpty()) {
                                if (!missingChannels.isEmpty()) {
@@@ -662,7 -664,7 +663,7 @@@
                                .values().stream()
                                .filter(bot -> bot.channel()
                                                .equalsIgnoreCase(channel.get().name()))
-                               .collect(Collectors.toSet());
+                               .collect(toSet());
                botsToRemove.stream()
                                .forEach(bot -> networkBots.row(network.get())
                                                .remove(bot.name()));
@@@ -886,38 -888,38 +887,38 @@@
        @Subscribe
        public void dccSendReceived(final DccSendReceived dccSendReceived) {
                final Optional<Network> network = getNetwork(dccSendReceived.connection());
+               eventBus.post(new GenericMessage(format("Got DCC Send from %s for %s.", dccSendReceived.source(), dccSendReceived.filename())));
                if (!network.isPresent()) {
                        return;
                }
+               eventBus.post(new GenericMessage("a"));
  
-               Collection<Download> packDownloads = downloads.get(dccSendReceived.filename());
-               if (packDownloads.isEmpty()) {
-                       /* unknown download, ignore. */
-                       return;
-               }
+               Set<Download> openDownloads = downloads.values().stream()
+                               .filter(download -> download.bot().name().equalsIgnoreCase(dccSendReceived.source().nick().orNull()))
+                               .filter(download -> download.dccReceiver() == null)
+                               .collect(toSet());
+               eventBus.post(new GenericMessage("b"));
  
-               /* check if it’s already downloading. */
-               Collection<Download> runningDownloads = FluentIterable.from(packDownloads).filter(FILTER_RUNNING).toSet();
-               if (!runningDownloads.isEmpty()) {
-                       eventBus.post(new GenericMessage(String.format("Ignoring offer for %s, it’s already being downloaded.", dccSendReceived.filename())));
+               if (openDownloads.isEmpty()) {
+                       /* I don't think we requested this. */
+                       eventBus.post(new GenericMessage(format("Ignoring offer for %s, no open download from %s.", dccSendReceived.filename(), dccSendReceived.source())));
                        return;
                }
+               eventBus.post(new GenericMessage("c"));
  
-               /* locate the correct download. */
-               Collection<Download> requestedDownload = FluentIterable.from(packDownloads).filter(new Predicate<Download>() {
- 
-                       @Override
-                       public boolean apply(Download download) {
-                               return download.bot().network().equals(network.get()) && download.bot().name().equalsIgnoreCase(dccSendReceived.source().nick().get());
-                       }
-               }).toSet();
- 
-               /* we did not request this download. */
-               if (requestedDownload.isEmpty()) {
+               /* check if it’s already downloading. */
+               if (downloads.values().stream().anyMatch(download -> download.filename().equals(dccSendReceived.filename()) && download.dccReceiver() != null)) {
+                       eventBus.post(new GenericMessage(format("Ignoring offer for %s, it’s already being downloaded.", dccSendReceived.filename())));
                        return;
                }
+               eventBus.post(new GenericMessage("d"));
  
-               Download download = requestedDownload.iterator().next();
+               Download download = openDownloads.stream()
+                               .filter(it -> it.filename().equals(dccSendReceived.filename()))
+                               .findFirst()
+                               .orElse(openDownloads.iterator().next());
+               eventBus.post(new GenericMessage("e"));
+               eventBus.post(new GenericMessage(format("Downloading %s from %s as %s.", dccSendReceived.filename(), dccSendReceived.source(), download.filename())));
  
                /* check if the file already exists. */
                File outputFile = new File(temporaryDirectory, dccSendReceived.filename());