8 files changed, 163 insertions, 0 deletions
diff --git a/src/main/java/moe/nea/prickly/Main.java b/src/main/java/moe/nea/prickly/Main.java
new file mode 100644
index 0000000..bed9b61
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/Main.java
@@ -0,0 +1,10 @@
+package moe.nea.prickly;
+
+import moe.nea.prickly.server.Server;
+
+public class Main {
+	public static void main(String[] args) {
+		new Server()
+				.start();
+	}
+}
+\ No newline at end of file
diff --git a/src/main/java/moe/nea/prickly/config/Config.java b/src/main/java/moe/nea/prickly/config/Config.java
new file mode 100644
index 0000000..4c6e533
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/config/Config.java
@@ -0,0 +1,11 @@
+package moe.nea.prickly.config;
+
+import java.util.function.Supplier;
+
+public class Config {
+	private static ConfigPath
+			ROOT = new ConfigPath("PRICKLY"),
+			NET = ROOT.join("NET");
+	public static int PORT = NET.join("PORT").requireInt();
+	public static String HOST = NET.join("HOST").getString().orElse("0");
+}
diff --git a/src/main/java/moe/nea/prickly/config/ConfigCompat.java b/src/main/java/moe/nea/prickly/config/ConfigCompat.java
new file mode 100644
index 0000000..38291c5
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/config/ConfigCompat.java
@@ -0,0 +1,41 @@
+package moe.nea.prickly.config;
+
+import lombok.extern.slf4j.Slf4j;
+import org.jspecify.annotations.Nullable;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.Properties;
+
+@Slf4j
+public class ConfigCompat {
+	public static final Path ENV_FILE = Path.of(".env").toAbsolutePath();
+
+	@SuppressWarnings({"unchecked", "rawtypes"})
+	private static Map<String, String> loadDotenv() {
+		var properties = new Properties();
+		if (!Files.exists(ENV_FILE)) {
+			log.info("no .env file found at {}", ENV_FILE);
+		} else {
+			try (var reader = Files.newBufferedReader(ENV_FILE, StandardCharsets.UTF_8)) {
+				properties.load(reader);
+				log.info("loaded environment from {} ({} entries)", ENV_FILE, properties.size());
+			} catch (IOException e) {
+				log.error("could not read .env file at {}", ENV_FILE, e);
+			}
+		}
+		return (Map) properties;
+	}
+
+	public static Map<String, String> DOTENV_FALLBACK = loadDotenv();
+
+	public static @Nullable String getEnv(String key) {
+		var value = System.getenv(key);
+		if (value != null)
+			return value;
+		return DOTENV_FALLBACK.get(key);
+	}
+}
diff --git a/src/main/java/moe/nea/prickly/config/ConfigPath.java b/src/main/java/moe/nea/prickly/config/ConfigPath.java
new file mode 100644
index 0000000..3311910
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/config/ConfigPath.java
@@ -0,0 +1,57 @@
+package moe.nea.prickly.config;
+
+import lombok.extern.slf4j.Slf4j;
+
+import java.util.Optional;
+import java.util.function.Supplier;
+
+@Slf4j
+public record ConfigPath(String path) {
+	public ConfigPath join(String extraPath) {
+		return new ConfigPath(path + "_" + extraPath);
+	}
+
+	public Optional<String> getString() {
+		return Optional.ofNullable(ConfigCompat.getEnv(path));
+	}
+
+	public Optional<Integer> getInt() {
+		var str = getString();
+		if (str.isPresent())
+			try {
+				return Optional.of(Integer.parseInt(str.get()));
+			} catch (NumberFormatException ex) {
+				log.warn("could not parse config value at {}", path, ex);
+			}
+		return Optional.empty();
+	}
+
+	public Optional<Boolean> getBoolean() {
+		var str = getString();
+		if (str.isPresent()) {
+			var sstr = str.get();
+			if (sstr.equalsIgnoreCase("true") || sstr.equals("1"))
+				return OPT_TRUE;
+			else if (sstr.equalsIgnoreCase("false") || sstr.equals("0"))
+				return OPT_FALSE;
+			else
+				log.warn("could not parse boolean value at {}", path);
+		}
+		return Optional.empty();
+	}
+
+	private static final Optional<Boolean> OPT_TRUE = Optional.of(true),
+			OPT_FALSE = Optional.of(false);
+
+	public Supplier<RuntimeException> requireMessage() {
+		return () -> new RuntimeException("missing required value at path " + path());
+	}
+
+	public String requireString() {
+		return getString().orElseThrow(requireMessage());
+	}
+
+	public int requireInt() {
+		return getInt().orElseThrow(requireMessage());
+	}
+}
diff --git a/src/main/java/moe/nea/prickly/config/package-info.java b/src/main/java/moe/nea/prickly/config/package-info.java
new file mode 100644
index 0000000..06b9251
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/config/package-info.java
@@ -0,0 +1,4 @@
+@NullMarked
+package moe.nea.prickly.config;
+
+import org.jspecify.annotations.NullMarked;
+\ No newline at end of file
diff --git a/src/main/java/moe/nea/prickly/package-info.java b/src/main/java/moe/nea/prickly/package-info.java
new file mode 100644
index 0000000..b317278
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/package-info.java
@@ -0,0 +1,4 @@
+@NullMarked
+package moe.nea.prickly;
+
+import org.jspecify.annotations.NullMarked;
+\ No newline at end of file
diff --git a/src/main/java/moe/nea/prickly/server/Server.java b/src/main/java/moe/nea/prickly/server/Server.java
new file mode 100644
index 0000000..cbb9804
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/server/Server.java
@@ -0,0 +1,32 @@
+package moe.nea.prickly.server;
+
+import io.javalin.Javalin;
+import io.javalin.config.JavalinConfig;
+import lombok.extern.slf4j.Slf4j;
+import moe.nea.prickly.config.Config;
+
+@Slf4j
+public class Server {
+	Javalin javalin;
+
+	public Server() {
+		log.info("creating server instance");
+		javalin = Javalin.create(this::configure);
+		installRoutes();
+	}
+
+	protected void installRoutes() {
+		log.info("installing routes");
+	}
+
+	protected void configure(JavalinConfig config) {
+		log.info("configuring javalin");
+	}
+
+	public void start() {
+		var port = Config.PORT;
+		var host = Config.HOST;
+		log.info("starting on port http://{}:{}", host, port);
+		javalin.start(host, port);
+	}
+}
diff --git a/src/main/java/moe/nea/prickly/server/package-info.java b/src/main/java/moe/nea/prickly/server/package-info.java
new file mode 100644
index 0000000..32acf65
--- /dev/null
+++ b/src/main/java/moe/nea/prickly/server/package-info.java
@@ -0,0 +1,4 @@
+@NullMarked
+package moe.nea.prickly.server;
+
+import org.jspecify.annotations.NullMarked;
+\ No newline at end of file