Add /jailedplayers command to list jailed players

Essentials/src/main/java/com/earth2me/essentials/Essentials.java

@@ -146,6 +146,8 @@
 import java.util.function.Predicate;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.Objects;
+import java.util.stream.Collectors;
 
 import static com.earth2me.essentials.I18n.tlLiteral;
 import static com.earth2me.essentials.I18n.tlLocale;
@@ -903,6 +905,11 @@ public BukkitScheduler getScheduler() {
         return this.getServer().getScheduler();
     }
 
+    @Override
+    public List<Player> getJailedPlayers() {
+        return getUsers().getAllUserUUIDs().stream().map(this::getUser).filter(Objects::nonNull).filter(User::isJailed).map(User::getBase).filter(Objects::nonNull).collect(Collectors.toList());
+    }
+
     @Override
     public IJails getJails() {
         return jails;

Essentials/src/main/java/com/earth2me/essentials/IEssentials.java

@@ -82,6 +82,8 @@ public interface IEssentials extends Plugin {
 
     BukkitScheduler getScheduler();
 
+    List<Player> getJailedPlayers();
+
     IJails getJails();
 
     IWarps getWarps();

Essentials/src/main/java/com/earth2me/essentials/commands/Commandjailedplayers.java

@@ -0,0 +1,23 @@
+package com.earth2me.essentials.commands;
+
+import com.earth2me.essentials.CommandSource;
+import com.earth2me.essentials.utils.StringUtil;
+import org.bukkit.Server;
+import org.bukkit.entity.Player;
+
+import java.util.stream.Collectors;
+
+public class Commandjailedplayers extends EssentialsCommand {
+    public Commandjailedplayers() {
+        super("jailedplayers");
+    }
+
+    @Override
+    protected void run(final Server server, final CommandSource sender, final String commandLabel, final String[] args) throws Exception {
+        if (ess.getJailedPlayers() != null && !ess.getJailedPlayers().isEmpty()) {
+            sender.sendTl("jailedPlayersList", StringUtil.joinList(", ", ess.getJailedPlayers().stream().map(Player::getName).collect(Collectors.toList())));
+        } else {
+            sender.sendTl("jailedPlayersEmpty");
+        }
+    }
+}

Essentials/src/main/resources/messages.properties

@@ -625,6 +625,8 @@ itemdbCommandUsage=/<command> <item>
 itemdbCommandUsage1=/<command> <item>
 itemdbCommandUsage1Description=Searches the item database for the given item
 jailAlreadyIncarcerated=<dark_red>Person is already in jail\:<secondary> {0}
+jailedPlayersList=<primary>Jailed Players\:<reset> {0}
+jailedPlayersEmpty=<primary>There are no jailed players.
 jailList=<primary>Jails\:<reset> {0}
 jailMessage=<dark_red>You do the crime, you do the time.
 jailNotExist=<dark_red>That jail does not exist.
@@ -638,6 +640,8 @@ jailSet=<primary>Jail<secondary> {0} <primary>has been set.
 jailWorldNotExist=<dark_red>That jail's world does not exist.
 jumpEasterDisable=<primary>Flying wizard mode disabled.
 jumpEasterEnable=<primary>Flying wizard mode enabled.
+jailedplayersCommandDescription=List all jailed players.
+jailedplayersCommandUsage=/<command>
 jailsCommandDescription=List all jails.
 jailsCommandUsage=/<command>
 jumpCommandDescription=Jumps to the nearest block in the line of sight.

Essentials/src/main/resources/plugin.yml

@@ -243,6 +243,10 @@ commands:
     description: Names an item.
     usage: /<command> [name]
     aliases: [iname, einame, eitemname, itemrename, irename, eitemrename, eirename]
+  jailedplayers:
+    description: List all jailed players.
+    usage: /<command>
+    aliases: [ejailed, ejp]
   jails:
     description: List all jails.
     usage: /<command>
@@ -955,6 +959,8 @@ permissions:
     description: Allows the bearer to damage blocks while jailed
   essentials.jail.allow-interact:
     description: Allows the bearer to interact with blocks while jailed
+  essentials.jailedplayers:
+    description: Allows access to the /jailedplayers command
   essentials.jails:
     description: Allows access to the /jails command
   essentials.deljail: