2 files changed, 221 insertions, 0 deletions
diff --git a/src/main/java/eu/olli/cowlection/handler/FriendsHandler.java b/src/main/java/eu/olli/cowlection/handler/FriendsHandler.java
new file mode 100644
index 0000000..a51fcd4
--- /dev/null
+++ b/src/main/java/eu/olli/cowlection/handler/FriendsHandler.java
@@ -0,0 +1,174 @@
+package eu.olli.cowlection.handler;
+
+import com.google.gson.JsonParseException;
+import com.google.gson.reflect.TypeToken;
+import eu.olli.cowlection.Cowlection;
+import eu.olli.cowlection.command.exception.ApiContactException;
+import eu.olli.cowlection.data.Friend;
+import eu.olli.cowlection.util.ApiUtils;
+import eu.olli.cowlection.util.GsonUtils;
+import eu.olli.cowlection.util.TickDelay;
+import io.netty.util.internal.ConcurrentSet;
+import net.minecraft.command.PlayerNotFoundException;
+import net.minecraft.event.ClickEvent;
+import net.minecraft.event.HoverEvent;
+import net.minecraft.util.ChatComponentText;
+import net.minecraft.util.ChatStyle;
+import net.minecraft.util.EnumChatFormatting;
+import org.apache.commons.io.FileUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.Type;
+import java.nio.charset.StandardCharsets;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+
+public class FriendsHandler {
+    private static final long UPDATE_FREQUENCY_DEFAULT = TimeUnit.HOURS.toMillis(15);
+    private static final long UPDATE_FREQUENCY_MINIMUM = TimeUnit.MINUTES.toMillis(5);
+    private final Cowlection main;
+    private Set<Friend> bestFriends = new ConcurrentSet<>();
+    private File bestFriendsFile;
+    private UpdateStatus updateStatus;
+
+    public FriendsHandler(Cowlection main, File friendsFile) {
+        this.main = main;
+        this.bestFriendsFile = friendsFile;
+        this.updateStatus = UpdateStatus.IDLE;
+        loadBestFriends();
+        updateBestFriends(false);
+    }
+
+    public boolean isBestFriend(String playerName, boolean ignoreCase) {
+        if (ignoreCase) {
+            return bestFriends.stream().map(Friend::getName).anyMatch(playerName::equalsIgnoreCase);
+        } else {
+            return bestFriends.stream().map(Friend::getName).anyMatch(playerName::equals);
+        }
+    }
+
+    public void addBestFriend(String name) {
+        if (name.isEmpty()) {
+            return;
+        }
+
+        ApiUtils.fetchFriendData(name, friend -> {
+            if (friend == null) {
+                throw new ApiContactException("Mojang", "didn't add " + name + " as a best friend.");
+            } else if (friend.equals(Friend.FRIEND_NOT_FOUND)) {
+                throw new PlayerNotFoundException("There is no player with the name " + EnumChatFormatting.DARK_RED + name + EnumChatFormatting.RED + ".");
+            } else {
+                boolean added = bestFriends.add(friend);
+                if (added) {
+                    main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "Added " + EnumChatFormatting.DARK_GREEN + friend.getName() + EnumChatFormatting.GREEN + " as best friend.");
+                    saveBestFriends();
+                }
+            }
+        });
+    }
+
+    public boolean removeBestFriend(String name) {
+        boolean removed = bestFriends.removeIf(friend -> friend.getName().equalsIgnoreCase(name));
+        if (removed) {
+            saveBestFriends();
+        }
+        return removed;
+    }
+
+    public Set<String> getBestFriends() {
+        return bestFriends.stream().map(Friend::getName).collect(Collectors.toCollection(TreeSet::new));
+    }
+
+    public Friend getBestFriend(String name) {
+        return bestFriends.stream().filter(friend -> friend.getName().equalsIgnoreCase(name)).findFirst().orElse(Friend.FRIEND_NOT_FOUND);
+    }
+
+    private Friend getBestFriend(UUID uuid) {
+        return bestFriends.stream().filter(friend -> friend.getUuid().equals(uuid)).findFirst().orElse(Friend.FRIEND_NOT_FOUND);
+    }
+
+    public void updateBestFriends(boolean isCommandTriggered) {
+        bestFriends.stream().filter(friend -> System.currentTimeMillis() - friend.getLastChecked() > (isCommandTriggered ? UPDATE_FREQUENCY_MINIMUM : UPDATE_FREQUENCY_DEFAULT)).forEach(this::updateBestFriend);
+
+        new TickDelay(() -> {
+            if (this.updateStatus != UpdateStatus.IDLE) {
+                if (isCommandTriggered && updateStatus == UpdateStatus.NO_NAME_CHANGES) {
+                    main.getChatHelper().sendMessage(EnumChatFormatting.GOLD, "No name changes detected.");
+                }
+                saveBestFriends();
+                this.updateStatus = UpdateStatus.IDLE;
+            }
+        }, 10 * 20);
+    }
+
+    private void updateBestFriend(Friend friend) {
+        ApiUtils.fetchCurrentName(friend, newName -> {
+            if (newName == null) {
+                // skipping friend, something went wrong with API request
+            } else if (newName.equals(ApiUtils.UUID_NOT_FOUND)) {
+                throw new PlayerNotFoundException("How did you manage to get a unique id on your best friends list that has no name attached to it?");
+            } else if (newName.equals(friend.getName())) {
+                // name hasn't changed, only updating lastChecked timestamp
+                Friend bestFriend = getBestFriend(friend.getUuid());
+                if (!bestFriend.equals(Friend.FRIEND_NOT_FOUND)) {
+                    bestFriend.setLastChecked(System.currentTimeMillis());
+                    if (this.updateStatus == UpdateStatus.IDLE) {
+                        this.updateStatus = UpdateStatus.NO_NAME_CHANGES;
+                    }
+                }
+            } else {
+                // name has changed
+                main.getChatHelper().sendMessage(new ChatComponentText("Your best friend " + EnumChatFormatting.DARK_GREEN + friend.getName() + EnumChatFormatting.GREEN + " changed the name to " + EnumChatFormatting.DARK_GREEN + newName + EnumChatFormatting.GREEN + ".").setChatStyle(new ChatStyle()
+                        .setColor(EnumChatFormatting.GREEN)
+                        .setChatClickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, "https://namemc.com/search?q=" + newName))
+                        .setChatHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ChatComponentText(EnumChatFormatting.YELLOW + "View " + EnumChatFormatting.GOLD + newName + EnumChatFormatting.YELLOW + "'s name history on namemc.com")))));
+
+                Friend bestFriend = getBestFriend(friend.getUuid());
+                if (!bestFriend.equals(Friend.FRIEND_NOT_FOUND)) {
+                    bestFriend.setName(newName);
+                    bestFriend.setLastChecked(System.currentTimeMillis());
+                    this.updateStatus = UpdateStatus.NAME_CHANGED;
+                }
+            }
+        });
+    }
+
+    public synchronized void saveBestFriends() {
+        try {
+            String bestFriendsJsonZoned = GsonUtils.toJson(this.bestFriends);
+            FileUtils.writeStringToFile(this.bestFriendsFile, bestFriendsJsonZoned, StandardCharsets.UTF_8);
+        } catch (IOException e) {
+            main.getLogger().error("Couldn't save best friends", e);
+        }
+    }
+
+    private void loadBestFriends() {
+        try {
+            boolean createdNewFile = this.bestFriendsFile.createNewFile();
+
+            this.bestFriends.clear();
+            if (!createdNewFile) {
+                String bestFriendsData = FileUtils.readFileToString(this.bestFriendsFile, StandardCharsets.UTF_8);
+                this.bestFriends.addAll(parseJson(bestFriendsData));
+            }
+        } catch (IOException e) {
+            main.getLogger().error("Couldn't read best friends file " + this.bestFriendsFile, e);
+        } catch (JsonParseException e) {
+            main.getLogger().error("Couldn't parse best friends file " + this.bestFriendsFile, e);
+        }
+    }
+
+    private Set<Friend> parseJson(String bestFriendsData) {
+        Type collectionType = new TypeToken<Set<Friend>>() {
+        }.getType();
+        return GsonUtils.fromJson(bestFriendsData, collectionType);
+    }
+
+    private enum UpdateStatus {
+        IDLE, NAME_CHANGED, NO_NAME_CHANGES
+    }
+}
diff --git a/src/main/java/eu/olli/cowlection/handler/PlayerCache.java b/src/main/java/eu/olli/cowlection/handler/PlayerCache.java
new file mode 100644
index 0000000..abaff0a
--- /dev/null
+++ b/src/main/java/eu/olli/cowlection/handler/PlayerCache.java
@@ -0,0 +1,47 @@
+package eu.olli.cowlection.handler;
+
+import com.google.common.collect.EvictingQueue;
+import eu.olli.cowlection.Cowlection;
+
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+public class PlayerCache {
+    @SuppressWarnings("UnstableApiUsage")
+    private final EvictingQueue<String> nameCache = EvictingQueue.create(50);
+    @SuppressWarnings("UnstableApiUsage")
+    private final EvictingQueue<String> bestFriendCache = EvictingQueue.create(50);
+    private final Cowlection main;
+
+    public PlayerCache(Cowlection main) {
+        this.main = main;
+    }
+
+    public void add(String name) {
+        // remove old entry (if exists) to 'push' name to the end of the queue
+        nameCache.remove(name);
+        nameCache.add(name);
+    }
+
+    public void addBestFriend(String name) {
+        // remove old entry (if exists) to 'push' name to the end of the queue
+        bestFriendCache.remove(name);
+        bestFriendCache.add(name);
+    }
+
+    public void removeBestFriend(String name) {
+        bestFriendCache.remove(name);
+    }
+
+    public SortedSet<String> getAllNamesSorted() {
+        SortedSet<String> nameList = new TreeSet<>(String.CASE_INSENSITIVE_ORDER);
+        nameList.addAll(bestFriendCache);
+        nameList.addAll(nameCache);
+        return nameList;
+    }
+
+    public void clearAllCaches() {
+        nameCache.clear();
+        bestFriendCache.clear();
+    }
+}