Implemented the setmail command

src/main/java/fr/xephi/authme/command/CommandManager.java

@@ -166,7 +166,7 @@ public class CommandManager {
 
         // Register the getemail command
         CommandDescription getEmailCommand = new CommandDescription(
-                new RegisterCommand(),
+                new GetEmailCommand(),
                 new ArrayList<String>() {{
                     add("getemail");
                     add("getmail");
@@ -179,6 +179,22 @@ public class CommandManager {
         getEmailCommand.setCommandPermissions("authme.admin.getemail", CommandPermissions.DefaultPermission.OP_ONLY);
         getEmailCommand.addArgument(new CommandArgumentDescription("player", "Player name", true));
 
+        // Register the setemail command
+        CommandDescription setEmailCommand = new CommandDescription(
+                new SetEmailCommand(),
+                new ArrayList<String>() {{
+                    add("chgemail");
+                    add("chgmail");
+                    add("setemail");
+                    add("setmail");
+                }},
+                "Change player's email",
+                "Change the email address of the specified player.",
+                authMeCommand);
+        setEmailCommand.setCommandPermissions("authme.admin.chgemail", CommandPermissions.DefaultPermission.OP_ONLY);
+        setEmailCommand.addArgument(new CommandArgumentDescription("player", "Player name", false));
+        setEmailCommand.addArgument(new CommandArgumentDescription("email", "Player email", false));
+
         // Register the purge command
         CommandDescription purgeCommand = new CommandDescription(
                 new PurgeCommand(),

src/main/java/fr/xephi/authme/command/executable/authme/SetEmailCommand.java

@@ -0,0 +1,63 @@
+package fr.xephi.authme.command.executable.authme;
+
+import fr.xephi.authme.AuthMe;
+import fr.xephi.authme.cache.auth.PlayerAuth;
+import fr.xephi.authme.cache.auth.PlayerCache;
+import fr.xephi.authme.command.CommandParts;
+import fr.xephi.authme.command.ExecutableCommand;
+import fr.xephi.authme.settings.Messages;
+import fr.xephi.authme.settings.Settings;
+import org.bukkit.command.CommandSender;
+
+public class SetEmailCommand extends ExecutableCommand {
+
+    /**
+     * Execute the command.
+     *
+     * @param sender           The command sender.
+     * @param commandReference The command reference.
+     * @param commandArguments The command arguments.
+     *
+     * @return True if the command was executed successfully, false otherwise.
+     */
+    @Override
+    public boolean executeCommand(CommandSender sender, CommandParts commandReference, CommandParts commandArguments) {
+        // AuthMe plugin instance
+        AuthMe plugin = AuthMe.getInstance();
+
+        // Messages instance
+        Messages m = Messages.getInstance();
+
+        // Get the player name and email address
+        String playerName = commandArguments.get(0);
+        String playerEmail = commandArguments.get(1);
+
+        // Validate the email address
+        if (!Settings.isEmailCorrect(playerEmail)) {
+            m.send(sender, "email_invalid");
+            return true;
+        }
+
+        // Validate the user
+        PlayerAuth auth = plugin.database.getAuth(playerName.toLowerCase());
+        if (auth == null) {
+            m.send(sender, "unknown_user");
+            return true;
+        }
+
+        // Set the email address
+        auth.setEmail(playerEmail);
+        if (!plugin.database.updateEmail(auth)) {
+            m.send(sender, "error");
+            return true;
+        }
+
+        // Update the player cache
+        if (PlayerCache.getInstance().getAuth(playerName.toLowerCase()) != null)
+            PlayerCache.getInstance().updatePlayer(auth);
+
+        // Show a status message
+        m.send(sender, "email_changed");
+        return true;
+    }
+}