Qute type-safe messages - default bundle name strategy #2

- follows up on quarkusio#31299

Author: mkouba

docs/src/main/asciidoc/qute-reference.adoc

@@ -2498,24 +2498,26 @@ The message bundles can be used at runtime:
 
 The bundle name is defaulted unless it's specified with `@MessageBundle#value()`.
 For a top-level class the `msg` value is used by default.
-For a nested class the name starts with `msg` followed by an underscore, followed by the simple names of all enclosing classes in the hierarchy (top-level class goes first) seperated by underscores.
+For a nested class the name consists of the simple names of all enclosing classes in the hierarchy (top-level class goes first), followed by the simple name of the message bundle interface.
+Names are separated by underscores.
 
-For example, the name of the following message bundle will be defaulted to `msg_Index`:
+For example, the name of the following message bundle will be defaulted to `Controller_index`:
 
 [source,java]
 ----
-class Index {
+class Controller {
 
     @MessageBundle
-    interface Bundle {
+    interface index {
 
         @Message("Hello {name}!")
-        String hello(String name);
+        String hello(String name); <1>
    }
 }
 ----
+<1> This message could be used in a template via `{Controller_index:hello(name)}`.
 
-NOTE: The bundle name is also used as a part of the name of a localized file, e.g. `msg_Index` in the `msg_Index_de.properties`.
+NOTE: The bundle name is also used as a part of the name of a localized file, e.g. `Controller_index` in the `Controller_index_de.properties`.
 
 ==== Bundle Name and Message Keys
 

extensions/qute/deployment/src/main/java/io/quarkus/qute/deployment/MessageBundleProcessor.java

@@ -144,21 +144,19 @@ List<MessageBundleBuildItem> processBundles(BeanArchiveIndexBuildItem beanArchiv
                         } else {
                             // The name starts with the DEFAULT_NAME followed by an underscore, followed by simple names of all
                             // declaring classes in the hierarchy seperated by underscores
-                            List<String> enclosingNames = new ArrayList<>();
+                            List<String> names = new ArrayList<>();
+                            names.add(DotNames.simpleName(bundleClass));
                             DotName enclosingName = bundleClass.enclosingClass();
                             while (enclosingName != null) {
                                 ClassInfo enclosingClass = index.getClassByName(enclosingName);
                                 if (enclosingClass != null) {
-                                    enclosingNames.add(DotNames.simpleName(enclosingClass));
+                                    names.add(DotNames.simpleName(enclosingClass));
                                     enclosingName = enclosingClass.nestingType() == NestingType.TOP_LEVEL ? null
                                             : enclosingClass.enclosingClass();
                                 }
                             }
-                            enclosingNames.add(MessageBundle.DEFAULT_NAME);
-                            // Class Bar declares nested class Foo and bundle Baz is declared as nested interface of Foo
-                            // [Foo, Bar, msg] -> [msg, Bar, Foo]
-                            Collections.reverse(enclosingNames);
-                            name = String.join("_", enclosingNames);
+                            Collections.reverse(names);
+                            name = String.join("_", names);
                         }
                         LOG.debugf("Message bundle %s: name defaulted to %s", bundleClass, name);
                     }

extensions/qute/deployment/src/test/java/io/quarkus/qute/deployment/i18n/Controller.java

@@ -0,0 +1,24 @@
+package io.quarkus.qute.deployment.i18n;
+
+import io.quarkus.qute.CheckedTemplate;
+import io.quarkus.qute.TemplateInstance;
+import io.quarkus.qute.i18n.Message;
+import io.quarkus.qute.i18n.MessageBundle;
+
+public class Controller {
+
+    @CheckedTemplate
+    static class Templates {
+
+        static native TemplateInstance index(String name);
+
+    }
+
+    @MessageBundle
+    public interface index {
+
+        @Message("Hello {name}!")
+        String hello(String name);
+    }
+
+}

extensions/qute/deployment/src/test/java/io/quarkus/qute/deployment/i18n/MessageBundleDefaultedNameTest.java

@@ -16,17 +16,17 @@ public class MessageBundleDefaultedNameTest {
     @RegisterExtension
     static final QuarkusUnitTest config = new QuarkusUnitTest()
             .withApplicationRoot((jar) -> jar
-                    .addClasses(Views.class)
+                    .addClasses(Controller.class)
                     .addAsResource(new StringAsset(
-                            "{msg_Views_Index:hello(name)}"),
-                            "templates/Index/index.html")
-                    .addAsResource(new StringAsset("hello=Ahoj {name}!"), "messages/msg_Views_Index_cs.properties"));
+                            "{Controller_index:hello(name)}"),
+                            "templates/Controller/index.html")
+                    .addAsResource(new StringAsset("hello=Ahoj {name}!"), "messages/Controller_index_cs.properties"));
 
     @Test
     public void testBundle() {
         assertEquals("Hello world!",
-                Views.Index.Templates.index("world").render());
-        assertEquals("Ahoj svete!", Views.Index.Templates.index("svete")
+                Controller.Templates.index("world").render());
+        assertEquals("Ahoj svete!", Controller.Templates.index("svete")
                 .setAttribute(MessageBundles.ATTRIBUTE_LOCALE, Locale.forLanguageTag("cs")).render());
     }
 

extensions/qute/deployment/src/test/java/io/quarkus/qute/deployment/i18n/MessageBundleLocaleTest.java

@@ -23,7 +23,7 @@ public class MessageBundleLocaleTest {
             .withApplicationRoot((jar) -> jar
                     .addClasses(Messages.class)
                     .addAsResource(new StringAsset(
-                            "{msg_MessageBundleLocaleTest:helloWorld}"),
+                            "{MessageBundleLocaleTest_Messages:helloWorld}"),
                             "templates/foo.html"));
 
     @Inject

extensions/qute/deployment/src/test/java/io/quarkus/qute/deployment/i18n/Views.java

@@ -43,18 +43,18 @@
      * <p>
      * For a top-level class the {@value #DEFAULT_NAME} is used.
      * <p>
-     * For a nested class the name starts with the {@value #DEFAULT_NAME} followed by an undercore, followed by the simple names
-     * of all enclosing classes in the hierarchy (top-level class goes first) seperated by underscores.
+     * For a nested class the name consists of the simple names of all enclosing classes in the hierarchy (top-level class goes
+     * first), followed by the simple name of the message bundle interface. Names are separated by underscores.
      *
-     * For example, the name of the following message bundle will be defaulted to {@code msg_Index} and it could
-     * be used in a template via <code>{msg_Index:hello(name)}</code>:
+     * For example, the name of the following message bundle will be defaulted to {@code Controller_index} and it could
+     * be used in a template via <code>{Controller_index:hello(name)}</code>:
      *
      * <pre>
      * <code>
-     * class Index {
+     * class Controller {
      *
      *    &#64;MessageBundle
-     *    interface Bundle {
+     *    interface index {
      *
      *       &#64;Message("Hello {name}!")
      *       String hello(String name);