Fix getOnlinePlayers call to support all versions

Moved IPlayerDataManager from api module to common module - it is not part of the API as there is no supported way to obtain an instance of it.

plugin/plugin-core/src/main/java/com/lishid/openinv/OpenInv.java

@@ -16,6 +16,10 @@
 
 package com.lishid.openinv;
 
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -143,10 +147,10 @@ public class OpenInv extends JavaPlugin implements IOpenInv {
         // Register commands to their executors
         getCommand("openinv").setExecutor(new OpenInvPluginCommand(this));
         getCommand("openender").setExecutor(new OpenEnderPluginCommand(this));
-        SearchInvPluginCommand searchInv = new SearchInvPluginCommand();
+        SearchInvPluginCommand searchInv = new SearchInvPluginCommand(this);
         getCommand("searchinv").setExecutor(searchInv);
         getCommand("searchender").setExecutor(searchInv);
-        getCommand("searchenchant").setExecutor(new SearchEnchantPluginCommand());
+        getCommand("searchenchant").setExecutor(new SearchEnchantPluginCommand(this));
         getCommand("silentchest").setExecutor(new SilentChestPluginCommand(this));
         getCommand("anychest").setExecutor(new AnyChestPluginCommand(this));
 
@@ -526,6 +530,36 @@ public class OpenInv extends JavaPlugin implements IOpenInv {
         this.pluginUsage.removeAll(plugin.getClass());
     }
 
+    @SuppressWarnings("unchecked")
+    public Collection<? extends Player> getOnlinePlayers() {
+
+        if (this.playerLoader != null) {
+            return this.playerLoader.getOnlinePlayers();
+        }
+
+        Method getOnlinePlayers;
+        try {
+            getOnlinePlayers = Bukkit.class.getDeclaredMethod("getOnlinePlayers");
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Collections.emptyList();
+        }
+
+        Object onlinePlayers;
+        try {
+            onlinePlayers = getOnlinePlayers.invoke(null);
+        } catch (Exception e) {
+            e.printStackTrace();
+            return Collections.emptyList();
+        }
+
+        if (onlinePlayers instanceof List) {
+            return (Collection<Player>) onlinePlayers;
+        }
+
+        return Arrays.asList((Player[]) onlinePlayers);
+    }
+
     /**
      * Method for handling a Player coming online.
      * 

plugin/plugin-core/src/main/java/com/lishid/openinv/commands/SearchEnchantPluginCommand.java

@@ -1,6 +1,7 @@
 package com.lishid.openinv.commands;
 
-import org.bukkit.Bukkit;
+import com.lishid.openinv.OpenInv;
+
 import org.bukkit.Material;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
@@ -19,6 +20,12 @@ import org.bukkit.inventory.meta.ItemMeta;
  */
 public class SearchEnchantPluginCommand implements CommandExecutor {
 
+    private final OpenInv plugin;
+
+    public SearchEnchantPluginCommand(OpenInv plugin) {
+        this.plugin = plugin;
+    }
+
     @Override
     public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
         if (args.length == 0) {
@@ -45,7 +52,7 @@ public class SearchEnchantPluginCommand implements CommandExecutor {
         }
 
         StringBuilder players = new StringBuilder();
-        for (Player player : Bukkit.getServer().getOnlinePlayers()) {
+        for (Player player : plugin.getOnlinePlayers()) {
             boolean flagInventory = containsEnchantment(player.getInventory(), enchant, level);
             boolean flagEnder = containsEnchantment(player.getEnderChest(), enchant, level);
 

plugin/plugin-core/src/main/java/com/lishid/openinv/commands/SearchInvPluginCommand.java

@@ -16,7 +16,8 @@
 
 package com.lishid.openinv.commands;
 
-import org.bukkit.Bukkit;
+import com.lishid.openinv.OpenInv;
+
 import org.bukkit.ChatColor;
 import org.bukkit.Material;
 import org.bukkit.command.Command;
@@ -27,6 +28,12 @@ import org.bukkit.inventory.Inventory;
 
 public class SearchInvPluginCommand implements CommandExecutor {
 
+    private final OpenInv plugin;
+
+    public SearchInvPluginCommand(OpenInv plugin) {
+        this.plugin = plugin;
+    }
+
     @Override
     public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
 
@@ -54,7 +61,7 @@ public class SearchInvPluginCommand implements CommandExecutor {
         }
 
         StringBuilder players = new StringBuilder();
-        for (Player player : Bukkit.getServer().getOnlinePlayers()) {
+        for (Player player : plugin.getOnlinePlayers()) {
             Inventory inventory = command.getName().equals("searchinv") ? player.getInventory() : player.getEnderChest();
             if (inventory.contains(material, count)) {
                 players.append(player.getName()).append(", ");