init: create basic server + config

1 files changed, 41 insertions, 0 deletions

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);
+	}
+}