1 files changed, 90 insertions, 0 deletions
diff --git a/server/src/error/mod.rs b/server/src/error/mod.rs
new file mode 100644
index 0000000..281a074
--- /dev/null
+++ b/server/src/error/mod.rs
@@ -0,0 +1,90 @@
+// Copyright 2022-2024 Gabriel Bjørnager Jensen.
+
+use std::error::Error as StdError;
+use std::fmt::{Display, Formatter};
+use std::process::{ExitCode, Termination};
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Debug)]
+pub enum Error {
+	ConfigError { message: String },
+
+	IllegalArgument { arg: String },
+
+	IllegalFieldValue { field: &'static str, value: String, source: Box<dyn StdError> },
+
+	MissingConfig,
+
+	MissingField { field: &'static str },
+
+	NetworkError { source: std::io::Error },
+
+	SerialiseError { source: bzipper::Error },
+}
+
+impl Display for Error {
+	#[inline]
+	fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+		use Error::*;
+
+		match *self {
+			ConfigError { ref message }
+			=> write!(f, "unable to load configuration: \"{message}\""),
+
+			IllegalArgument { ref arg }
+			=> write!(f, "illegal argument `{arg}` provided"),
+
+			IllegalFieldValue { field, ref value, ref source }
+			=> write!(f, "illegal configuration value {value:?} for field `{field}`: \"{source}\""),
+
+			MissingConfig
+			=> write!(f, "no configuration provided"),
+
+			MissingField { field }
+			=> write!(f, "missing configuration field `{field}`"),
+
+			NetworkError { ref source }
+			=> write!(f, "network error: \"{source}\""),
+
+			SerialiseError { ref source }
+			=> write!(f, "error when serialising response: \"{source}\""),
+		}
+	}
+}
+
+impl StdError for Error {
+	#[allow(clippy::match_same_arms)]
+	#[inline]
+	fn source(&self) -> Option<&(dyn StdError + 'static)> {
+		use Error::*;
+
+		match *self {
+			IllegalFieldValue { ref source, .. } => Some(source.as_ref()),
+
+			NetworkError { ref source } => Some(source),
+
+			SerialiseError { ref source } => Some(source),
+
+			_ => None,
+		}
+	}
+}
+
+impl Termination for Error {
+	#[inline(always)]
+	fn report(self) -> ExitCode {
+		use Error::*;
+
+		match self {
+			| ConfigError { .. }
+			| IllegalArgument { .. }
+			| IllegalFieldValue { .. }
+			| MissingConfig
+			| MissingField { .. }
+			=> 0x2,
+
+			_ => 0x1,
+		}.into()
+	}
+}