#427 Replace registration settings with one registration type property

- Merge "useEmail" / "usePasswordConfirmation" / "useEmailConfirmation" settings into enum property
- Migrate old settings

src/main/java/fr/xephi/authme/settings/properties/RegistrationArgumentType.java

@@ -0,0 +1,59 @@
+package fr.xephi.authme.settings.properties;
+
+/**
+ * Type of arguments used for the login command.
+ */
+public enum RegistrationArgumentType {
+
+    /** /register [password] */
+    PASSWORD(Execution.PASSWORD, 1),
+
+    /** /register [password] [password] */
+    PASSWORD_WITH_CONFIRMATION(Execution.PASSWORD, 2),
+
+    /** /register [email] */
+    EMAIL(Execution.EMAIL, 1),
+
+    /** /register [email] [email] */
+    EMAIL_WITH_CONFIRMATION(Execution.EMAIL, 2);
+
+    // TODO #427: PASSWORD_WITH_EMAIL(PASSWORD, 2);
+
+    private final Execution execution;
+    private final int requiredNumberOfArgs;
+
+    /**
+     * Constructor.
+     *
+     * @param execution the registration process
+     * @param requiredNumberOfArgs the required number of arguments
+     */
+    RegistrationArgumentType(Execution execution, int requiredNumberOfArgs) {
+        this.execution = execution;
+        this.requiredNumberOfArgs = requiredNumberOfArgs;
+    }
+
+    /**
+     * @return the registration execution that is used for this argument type
+     */
+    public Execution getExecution() {
+        return execution;
+    }
+
+    /**
+     * @return number of arguments required to process the register command
+     */
+    public int getRequiredNumberOfArgs() {
+        return requiredNumberOfArgs;
+    }
+
+    /**
+     * Registration execution (the type of registration).
+     */
+    public enum Execution {
+
+        PASSWORD,
+        EMAIL
+
+    }
+}

src/main/java/fr/xephi/authme/settings/properties/RegistrationSettings.java

@@ -24,16 +24,12 @@ public class RegistrationSettings implements SettingsHolder {
     public static final Property<Boolean> FORCE =
         newProperty("settings.registration.force", true);
 
-    @Comment("Do we replace password registration by an email registration method?")
-    public static final Property<Boolean> USE_EMAIL_REGISTRATION =
-        newProperty("settings.registration.enableEmailRegistrationSystem", false);
-
     @Comment({
-        "Enable double check of email when you register",
-        "when it's true, registration requires that kind of command:",
-        "/register <email> <confirmEmail>"})
-    public static final Property<Boolean> ENABLE_CONFIRM_EMAIL =
-        newProperty("settings.registration.doubleEmailCheck", false);
+        "Type of registration: PASSWORD, PASSWORD_WITH_CONFIRMATION, EMAIL",
+        "EMAIL_WITH_CONFIRMATION, PASSWORD_WITH_EMAIL"
+    })
+    public static final Property<RegistrationArgumentType> REGISTRATION_TYPE =
+        newProperty(RegistrationArgumentType.class, "settings.registration.type", RegistrationArgumentType.PASSWORD_WITH_CONFIRMATION);
 
     @Comment({
         "Do we force kick a player after a successful registration?",

src/main/java/fr/xephi/authme/settings/properties/RestrictionSettings.java

@@ -126,13 +126,6 @@ public class RestrictionSettings implements SettingsHolder {
     public static final Property<Integer> ALLOWED_MOVEMENT_RADIUS =
         newProperty("settings.restrictions.allowedMovementRadius", 100);
 
-    @Comment({
-        "Enable double check of password when you register",
-        "when it's true, registration requires that kind of command:",
-        "/register <password> <confirmPassword>"})
-    public static final Property<Boolean> ENABLE_PASSWORD_CONFIRMATION =
-        newProperty("settings.restrictions.enablePasswordConfirmation", true);
-
     @Comment("Should we protect the player inventory before logging in? Requires ProtocolLib.")
     public static final Property<Boolean> PROTECT_INVENTORY_BEFORE_LOGIN =
         newProperty("settings.restrictions.ProtectInventoryBeforeLogIn", true);