Command to check when player was last online

src/main/java/pro/cloudnode/smp/smpcore/Configuration.java

@@ -1,5 +1,14 @@
 package pro.cloudnode.smp.smpcore;
 
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Formatter;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import org.jetbrains.annotations.NotNull;
+
+import java.time.temporal.ChronoUnit;
+import java.util.Objects;
+
 public final class Configuration extends BaseConfig {
     public Configuration() {
         super("config.yml");
@@ -25,4 +34,30 @@ public int membersInactiveDays() {
     public int altsMax() {
         return config.getInt("alts.max");
     }
+
+    public @NotNull Component relativeTime(final int t, final @NotNull ChronoUnit unit) {
+        final @NotNull String formatString = Objects.requireNonNull(config.getString("relative-time." + switch (unit) {
+            case SECONDS -> "seconds";
+            case MINUTES -> "minutes";
+            case HOURS -> "hours";
+            case DAYS -> "days";
+            case MONTHS -> "months";
+            case YEARS -> "years";
+            default -> {
+                throw new IllegalStateException("No relative time format for ChronoUnit " + unit);
+            }
+        }));
+        return MiniMessage.miniMessage()
+                .deserialize(formatString, Formatter.number("t", t), Formatter.choice("format", Math.abs(t)));
+    }
+
+    public @NotNull Component relativeTimeFuture(final @NotNull Component relativeTime) {
+        return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString("relative-time.future")), Placeholder.component("t", relativeTime));
+    }
+
+    public @NotNull Component relativeTimePast(final @NotNull Component relativeTime) {
+        return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString("relative-time.past")), Placeholder.component("t", relativeTime));
+    }
 }

src/main/java/pro/cloudnode/smp/smpcore/Messages.java

@@ -3,12 +3,15 @@
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.TextComponent;
 import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Formatter;
 import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
 import org.bukkit.OfflinePlayer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.time.ZoneOffset;
 import java.util.Arrays;
+import java.util.Date;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
@@ -141,6 +144,32 @@ public Messages() {
                         .ofNullable(alt.player().getName()).orElse(alt.player().getUniqueId().toString())));
     }
 
+    public @NotNull Component seen(final @NotNull Member member) {
+        if (member.player().isOnline()) return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString("seen.online")), Placeholder.unparsed("player", Optional
+                        .ofNullable(member.player().getName()).orElse(member.uuid.toString())));
+        final @NotNull Date lastSeen = new Date(member.player().getLastSeen());
+        return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString(member.isActive() ? "seen.active" : "seen.inactive")), Placeholder.unparsed("player", Optional
+                        .ofNullable(member.player().getName())
+                        .orElse(member.uuid.toString())), Formatter.date("last-seen", lastSeen.toInstant()
+                        .atZone(ZoneOffset.UTC)
+                        .toLocalDateTime()), Placeholder.component("last-seen-relative", SMPCore.relativeTime(lastSeen)));
+    }
+
+    public @NotNull Component seen(final @NotNull OfflinePlayer player) {
+        if (player.isOnline()) return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString("seen.online")), Placeholder.unparsed("player", Optional
+                        .ofNullable(player.getName()).orElse(player.getUniqueId().toString())));
+        final @NotNull Date lastSeen = new Date(player.getLastSeen());
+        return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString("seen.non-member")), Placeholder.unparsed("player", Optional
+                        .ofNullable(player.getName())
+                        .orElse(player.getUniqueId().toString())), Formatter.date("last-seen", lastSeen.toInstant()
+                        .atZone(ZoneOffset.UTC)
+                        .toLocalDateTime()), Placeholder.component("last-seen-relative", SMPCore.relativeTime(lastSeen)));
+    }
+
     // errors
 
     public @NotNull Component errorNoPermission() {
@@ -204,6 +233,12 @@ public Messages() {
                         .ofNullable(player.player().getName()).orElse(player.player().getUniqueId().toString())));
     }
 
+    public @NotNull Component errorNeverJoined(final @NotNull OfflinePlayer player) {
+        return MiniMessage.miniMessage()
+                .deserialize(Objects.requireNonNull(config.getString("error.never-joined")), Placeholder.unparsed("player", Optional
+                        .ofNullable(player.getName()).orElse(player.getUniqueId().toString())));
+    }
+
     public record SubCommandArgument(@NotNull String name, boolean required) {
         public @NotNull Component component() {
             return required ? SMPCore.messages().subCommandArgumentRequired(name) : SMPCore.messages()

src/main/java/pro/cloudnode/smp/smpcore/Permission.java

@@ -44,4 +44,6 @@ public final class Permission {
      * Remove an alt that has joined the server
      */
     public static @NotNull String ALT_REMOVE_JOINED = "smpcore.alt.remove.joined";
+
+    public static @NotNull String SEEN = "smpcore.seen";
 }

src/main/java/pro/cloudnode/smp/smpcore/SMPCore.java

@@ -2,13 +2,15 @@
 
 import com.zaxxer.hikari.HikariConfig;
 import com.zaxxer.hikari.HikariDataSource;
+import net.kyori.adventure.text.Component;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import pro.cloudnode.smp.smpcore.command.AltsCommand;
 import pro.cloudnode.smp.smpcore.command.BanCommand;
 import pro.cloudnode.smp.smpcore.command.Command;
 import pro.cloudnode.smp.smpcore.command.MainCommand;
+import pro.cloudnode.smp.smpcore.command.SeenCommand;
 import pro.cloudnode.smp.smpcore.command.UnbanCommand;
 import pro.cloudnode.smp.smpcore.listener.NationTeamUpdaterListener;
 
@@ -17,6 +19,8 @@
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
+import java.time.temporal.ChronoUnit;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
@@ -68,6 +72,7 @@ public void onEnable() {
             put("smpcore", new MainCommand());
             put("ban", new BanCommand());
             put("unban", new UnbanCommand());
+            put("seen", new SeenCommand());
         }};
         commands.put("alts", new AltsCommand(commands.get("smpcore")));
         for (final @NotNull Map.Entry<@NotNull String, @NotNull Command> entry : commands.entrySet())
@@ -162,4 +167,29 @@ public static boolean ifDisallowedCharacters(final @NotNull String source, final
         }
         return false;
     }
+
+    public static @NotNull Component relativeTime(final @NotNull Date date1, final @NotNull Date date2) {
+        final long diff = date1.getTime() - date2.getTime();
+        final long abs = Math.abs(diff);
+        final double seconds = Math.floor(abs / 1000.0);
+        final double minutes = Math.floor(seconds / 60.0);
+        final double hours = Math.floor(minutes / 60.0);
+        final double days = Math.floor(hours / 24.0);
+        final double months = Math.floor(days / 30.0);
+        final double years = Math.floor(months / 12.0);
+
+        final @NotNull Component t;
+        if (years > 0) t = SMPCore.config().relativeTime((int) years, ChronoUnit.YEARS);
+        else if (months > 0) t = SMPCore.config().relativeTime((int) months, ChronoUnit.MONTHS);
+        else if (days > 0) t = SMPCore.config().relativeTime((int) days, ChronoUnit.DAYS);
+        else if (hours > 0) t = SMPCore.config().relativeTime((int) hours, ChronoUnit.HOURS);
+        else if (minutes > 0) t = SMPCore.config().relativeTime((int) minutes, ChronoUnit.MINUTES);
+        else t = SMPCore.config().relativeTime((int) seconds, ChronoUnit.SECONDS);
+
+        return diff < 0 ? SMPCore.config().relativeTimePast(t) : SMPCore.config().relativeTimeFuture(t);
+    }
+
+    public static @NotNull Component relativeTime(final @NotNull Date date) {
+        return relativeTime(date, new Date());
+    }
 }

src/main/java/pro/cloudnode/smp/smpcore/command/SeenCommand.java

@@ -0,0 +1,34 @@
+package pro.cloudnode.smp.smpcore.command;
+
+import org.bukkit.OfflinePlayer;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import pro.cloudnode.smp.smpcore.Member;
+import pro.cloudnode.smp.smpcore.Permission;
+import pro.cloudnode.smp.smpcore.SMPCore;
+
+import java.util.List;
+import java.util.Optional;
+
+public final class SeenCommand extends Command {
+
+    @Override
+    public boolean run(@NotNull CommandSender sender, @NotNull String label, @NotNull String @NotNull [] args) {
+        if (!sender.hasPermission(Permission.SEEN)) return sendMessage(sender, SMPCore.messages().errorNoPermission());
+
+        if (args.length != 1) return sendMessage(sender, SMPCore.messages().usage(label, "<player>"));
+
+        final @NotNull OfflinePlayer player = sender.getServer().getOfflinePlayer(args[0]);
+
+        if (!player.hasPlayedBefore()) return sendMessage(sender, SMPCore.messages().errorNeverJoined(player));
+
+        final @NotNull Optional<@NotNull Member> member = Member.get(player.getUniqueId());
+        return member.map(m -> sendMessage(sender, SMPCore.messages().seen(m)))
+                .orElseGet(() -> sendMessage(sender, SMPCore.messages().seen(player)));
+    }
+
+    @Override
+    public @NotNull List<@NotNull String> tab(@NotNull CommandSender sender, @NotNull String label, @NotNull String @NotNull [] args) {
+        return Member.getNames().stream().toList();
+    }
+}

src/main/resources/config.yml

@@ -9,3 +9,13 @@ members:
 alts:
   # Maximum number of alts you can have
   max: 10
+
+relative-time:
+  seconds: <t> <format:'0#seconds|1#second|1<seconds'>
+  minutes: <t> <format:'0#minutes|1#minute|1<minutes'>
+  hours: <t> <format:'0#hours|1#hour|1<hours'>
+  days: <t> <format:'0#days|1#day|1<days'>
+  months: <t> <format:'0#months|1#month|1<months'>
+  years: <t> <format:'0#years|1#year|1<years'>
+  future: in <t>
+  past: <t> ago

src/main/resources/messages.yml

@@ -33,6 +33,12 @@ alts:
   created: <green>(!) Created member profile for <gray><alt></gray> and added as an alt.</green>
   deleted: <green>(!) Deleted alt member profile for <gray><alt></gray>.</green>
 
+seen:
+  online: <green>(!) Player <gray><player></gray> is online.</green>
+  active: <aqua>(!) Member <white><player></white> is <green>active</green> and last seen on <white><last-seen:'dd MMM yyyy HH:mm'> UTC</white> <gray>(<last-seen-relative>)</aqua>
+  inactive: <aqua>(!) Member <white><player></white> is <red>inactive</red> and last seen on <white><last-seen:'dd MMM yyyy HH:mm'> UTC</white> <gray>(<last-seen-relative>)</aqua>
+  non-member: <aqua>(!) Player <white><player></white> was last seen on <white><last-seen:'dd MMM yyyy HH:mm'> UTC</white> <gray>(<last-seen-relative>)</aqua>
+
 error:
   no-permission: <red>(!) You don't have permission to use this command.</red>
   player-not-banned: <red>(!) Player <gray><player></gray> is not banned and is not a member.</red>
@@ -45,3 +51,4 @@ error:
   max-alts-reached: <red>(!) You cannot have more than <gray><max></gray> alts.</red>
   member-not-alt: <red>(!) Member <gray><player></gray> is not an alt.</red>
   remove-joined-alt: <red>(!) You cannot remove alt player <gray><alt></gray> because they have played the server.</red>
+  never-joined: <red>(!) Player <gray><player></gray> has never played on the server.</red>

src/main/resources/plugin.yml

@@ -22,3 +22,8 @@ commands:
     description: Manage alternate accounts
     usage: /<command>
     aliases: [ alt ]
+  seen:
+    permission: smpcore.seen
+    description: Check when a player was last online
+    usage: /<command> <player>
+    aliases: [ lastseen ]