feat(protobuf): enhance support for nested messages and enums #31

Add the capability to properly construct nested messages within Protobuf definitions and include a new test case for enum parsing. This update ensures that the `ProtobufFullIdentListener` correctly handles nested structures and the `ProtobufAnalyserTest` reflects these changes with improved test code readability using the `@Language` annotation for Protobuf syntax highlighting.

chapi-ast-protobuf/src/main/kotlin/chapi/ast/protobuf/ProtobufFullIdentListener.kt

@@ -52,7 +52,7 @@ class ProtobufFullIdentListener(var fileName: String) : Protobuf3BaseListener()
                 }
 
                 is Protobuf3Parser.MessageDefContext -> {
-
+                    codeDataStruct.InnerStructures += constructMessageDef(child)
                 }
 
                 is Protobuf3Parser.ExtendDefContext -> {

chapi-ast-protobuf/src/test/kotlin/chapi/ast/protobuf/ProtobufAnalyserTest.kt

@@ -1,5 +1,6 @@
 package chapi.ast.protobuf
 
+import org.intellij.lang.annotations.Language
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.Assertions.*
 
@@ -8,7 +9,16 @@ class ProtobufAnalyserTest {
     @Test
     fun `should parse valid protobuf code and return a CodeContainer`() {
         // Given
-        val protobufCode = "syntax = \"proto3\";\npackage example;\n\nmessage Person {\n  string name = 1;\n  int32 id = 2;\n}"
+        @Language("protobuf")
+        val protobufCode = """
+syntax = "proto3";
+
+package example;
+
+message Person {
+  string name = 1;
+  int32 id = 2;
+}"""
         val filePath = "path/to/file.proto"
         val analyser = ProtobufAnalyser()
 
@@ -37,7 +47,17 @@ class ProtobufAnalyserTest {
     @Test
     fun `should parse valid protobuf code with enum and return a CodeContainer`() {
         // Given
-        val protobufCode = "syntax = \"proto3\";\npackage example;\n\nenum PhoneType {\n  MOBILE = 0;\n  HOME = 1;\n  WORK = 2;\n}"
+        @Language("protobuf")
+        val protobufCode = """
+syntax = "proto3";
+
+package example;
+
+enum PhoneType {
+  MOBILE = 0;
+  HOME = 1;
+  WORK = 2;
+}"""
         val filePath = "path/to/file.proto"
         val analyser = ProtobufAnalyser()
 
@@ -61,4 +81,42 @@ class ProtobufAnalyserTest {
         assertEquals("MOBILE", field.TypeKey)
         assertEquals("0", field.TypeValue)
     }
+
+    /// should support message in message
+    @Test
+    fun `should parse valid protobuf code with message in message and return a CodeContainer`() {
+        // Given
+        @Language("protobuf")
+        val protobufCode = """syntax = "proto3";
+package example;
+
+message Person {
+  string name = 1;
+  int32 id = 2;
+  message Address {
+    string street = 1;
+    string city = 2;
+  }
+}"""
+        val filePath = "path/to/file.proto"
+        val analyser = ProtobufAnalyser()
+
+        // When
+        val codeContainer = analyser.analysis(protobufCode, filePath)
+
+        val dataStruct = codeContainer.DataStructures.first()
+        val nestedDataStruct = dataStruct.InnerStructures.first()
+
+        assertEquals("Address", nestedDataStruct.NodeName)
+
+        val nestedField1 = nestedDataStruct.Fields.first()
+        assertEquals("string", nestedField1.TypeType)
+        assertEquals("street", nestedField1.TypeKey)
+        assertEquals("1", nestedField1.TypeValue)
+
+        val nestedField2 = nestedDataStruct.Fields[1]
+        assertEquals("string", nestedField2.TypeType)
+        assertEquals("city", nestedField2.TypeKey)
+        assertEquals("2", nestedField2.TypeValue)
+    }
 }