init: create basic server + config

1 files changed, 57 insertions, 0 deletions

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());
+	}
+}