From dbf8dc4bbd0e2921e70f94234d5be8f5c68f3640 Mon Sep 17 00:00:00 2001
From: Aaro Koivukangas <aaro.koivukangas@gmail.com>
Date: Thu, 29 Jan 2026 17:42:05 +0200
Subject: [PATCH] initial server done in scala

---
 .gitignore                            |  2 +
 compiler/.gitignore                   | 32 ++++++++++++++++
 compiler/README.md                    |  8 ++++
 compiler/build.sbt                    | 14 +++++++
 compiler/project/build.properties     |  1 +
 compiler/src/main/scala/Main.scala    | 54 +++++++++++++++++++++++++++
 compiler/src/test/scala/MySuite.scala |  9 +++++
 7 files changed, 120 insertions(+)
 create mode 100644 compiler/.gitignore
 create mode 100644 compiler/README.md
 create mode 100644 compiler/build.sbt
 create mode 100644 compiler/project/build.properties
 create mode 100644 compiler/src/main/scala/Main.scala
 create mode 100644 compiler/src/test/scala/MySuite.scala

diff --git a/.gitignore b/.gitignore
index 4349de8..28f2453 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@ __pycache__
 build
 .cache
 target
+.metals
+.vscode
diff --git a/compiler/.gitignore b/compiler/.gitignore
new file mode 100644
index 0000000..9e79245
--- /dev/null
+++ b/compiler/.gitignore
@@ -0,0 +1,32 @@
+# macOS
+.DS_Store
+
+# sbt specific
+dist/*
+target/
+lib_managed/
+src_managed/
+project/boot/
+project/plugins/project/
+project/local-plugins.sbt
+.history
+.ensime
+.ensime_cache/
+.sbt-scripted/
+local.sbt
+
+# Bloop
+.bsp
+
+# VS Code
+.vscode/
+
+# Metals
+.bloop/
+.metals/
+metals.sbt
+
+# IDEA
+.idea
+.idea_modules
+/.worksheet/
diff --git a/compiler/README.md b/compiler/README.md
new file mode 100644
index 0000000..102c5ca
--- /dev/null
+++ b/compiler/README.md
@@ -0,0 +1,8 @@
+## sbt project compiled with Scala 3
+
+### Usage
+
+This is a normal sbt project. You can compile code with `sbt compile`, run it with `sbt run`, and `sbt console` will start a Scala 3 REPL.
+
+For more information on the sbt-dotty plugin, see the
+[scala3-example-project](https://github.com/scala/scala3-example-project/blob/main/README.md).
diff --git a/compiler/build.sbt b/compiler/build.sbt
new file mode 100644
index 0000000..6c1640b
--- /dev/null
+++ b/compiler/build.sbt
@@ -0,0 +1,14 @@
+val scala3Version = "3.8.1"
+
+lazy val root = project
+  .in(file("."))
+  .settings(
+    name := "compiler",
+    version := "0.1.0-SNAPSHOT",
+
+    scalaVersion := scala3Version,
+    libraryDependencies ++= Seq(
+      "org.scalameta" %% "munit" % "1.0.0" % Test,
+      "org.scala-lang" %% "toolkit" % "0.7.0"
+   )
+)
diff --git a/compiler/project/build.properties b/compiler/project/build.properties
new file mode 100644
index 0000000..bcdf773
--- /dev/null
+++ b/compiler/project/build.properties
@@ -0,0 +1 @@
+sbt.version=1.12.1
diff --git a/compiler/src/main/scala/Main.scala b/compiler/src/main/scala/Main.scala
new file mode 100644
index 0000000..61e5a85
--- /dev/null
+++ b/compiler/src/main/scala/Main.scala
@@ -0,0 +1,54 @@
+import java.io.{BufferedReader, InputStreamReader, PrintWriter}
+import java.net.{ServerSocket, Socket};
+import java.util.stream.Stream
+
+
+
+@main def hello(): Unit =
+  println("Hello world!")
+  println(msg)
+  run_server()
+
+def msg = "I was compiled by Scala 3. :)"
+
+def run_server(): Unit =
+  println("Starting server...")
+  val serverSocket: ServerSocket = new ServerSocket(3000);
+  println("Waiting for connections...")
+
+  while true do
+    // Accept incoming client connection
+    val clientSocket: Socket = serverSocket.accept();
+    println("Client connected!");
+
+    // Setup input and output streams for communication with the client
+    val in: BufferedReader = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
+    val out: PrintWriter = new PrintWriter(clientSocket.getOutputStream(), true);
+
+    // Read message from client
+    val message: String = in.readLine();
+    println("Client says: " + message);
+
+    val json: ujson.Value = ujson.read(message)
+    val command = json("command").str
+
+    val response = command match {
+      case "ping" => "{}"
+      case "compile" => s"{\"program\": \"${compile(json("code").str)}\"}"
+      case _ => s"{\"error\": \"Incorrect json request body\"}"
+    }
+
+    // Send response to the client
+    out.println(response);
+
+def compile(source: String): String =
+  return tokenizer(source).toString()
+
+
+class TokenLocation(column: Int, line: Int)
+class TokenLocationDebug()
+
+class Token(value: String, location: TokenLocation | TokenLocationDebug = TokenLocationDebug())
+
+def tokenizer(source: String): List[Token] =
+  return List(Token("test"))
diff --git a/compiler/src/test/scala/MySuite.scala b/compiler/src/test/scala/MySuite.scala
new file mode 100644
index 0000000..621784d
--- /dev/null
+++ b/compiler/src/test/scala/MySuite.scala
@@ -0,0 +1,9 @@
+// For more information on writing tests, see
+// https://scalameta.org/munit/docs/getting-started.html
+class MySuite extends munit.FunSuite {
+  test("example test that succeeds") {
+    val obtained = 42
+    val expected = 42
+    assertEquals(obtained, expected)
+  }
+}