Refactor errors and some other stuff/fixes

emgauwa-lib/src/errors/emgauwa_error.rs

@@ -0,0 +1,107 @@
+use std::fmt::{Debug, Display, Formatter};
+
+use actix_web::http::StatusCode;
+use actix_web::HttpResponse;
+use serde::ser::SerializeStruct;
+use serde::{Serialize, Serializer};
+
+use crate::errors::{ApiError, DatabaseError};
+
+pub enum EmgauwaError {
+	Api(ApiError),
+	Uid(uuid::Error),
+	Serialization(serde_json::Error),
+	Database(DatabaseError),
+}
+
+impl EmgauwaError {
+	fn get_code(&self) -> StatusCode {
+		match self {
+			EmgauwaError::Api(err) => err.get_code(),
+			EmgauwaError::Serialization(_) => StatusCode::INTERNAL_SERVER_ERROR,
+			EmgauwaError::Database(err) => err.get_code(),
+			EmgauwaError::Uid(_) => StatusCode::BAD_REQUEST,
+		}
+	}
+}
+
+impl From<&EmgauwaError> for String {
+	fn from(err: &EmgauwaError) -> Self {
+		match err {
+			EmgauwaError::Api(err) => String::from(err),
+			EmgauwaError::Serialization(_) => String::from("error during (de-)serialization"),
+			EmgauwaError::Database(err) => String::from(err),
+			EmgauwaError::Uid(_) => String::from("the uid is in a bad format"),
+		}
+	}
+}
+
+impl From<ApiError> for EmgauwaError {
+	fn from(value: ApiError) -> Self {
+		EmgauwaError::Api(value)
+	}
+}
+
+impl From<DatabaseError> for EmgauwaError {
+	fn from(value: DatabaseError) -> Self {
+		EmgauwaError::Database(value)
+	}
+}
+
+impl From<serde_json::Error> for EmgauwaError {
+	fn from(value: serde_json::Error) -> Self {
+		EmgauwaError::Serialization(value)
+	}
+}
+
+impl From<sqlx::Error> for EmgauwaError {
+	fn from(value: sqlx::Error) -> Self {
+		EmgauwaError::Database(DatabaseError::from(value))
+	}
+}
+
+impl From<uuid::Error> for EmgauwaError {
+	fn from(value: uuid::Error) -> Self {
+		EmgauwaError::Uid(value)
+	}
+}
+
+impl From<&EmgauwaError> for HttpResponse {
+	fn from(err: &EmgauwaError) -> Self {
+		HttpResponse::build(err.get_code()).json(err)
+	}
+}
+
+impl Serialize for EmgauwaError {
+	fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+	where
+		S: Serializer,
+	{
+		let mut s = serializer.serialize_struct("error", 2)?;
+		s.serialize_field("code", &self.get_code().as_u16())?;
+		s.serialize_field("description", &String::from(self))?;
+		s.end()
+	}
+}
+
+impl Display for EmgauwaError {
+	fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+		write!(f, "{}: {}", self.get_code(), String::from(self))
+	}
+}
+
+impl Debug for EmgauwaError {
+	fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+		write!(f, "{}", String::from(self))
+	}
+}
+
+impl actix_web::error::ResponseError for EmgauwaError {
+	fn status_code(&self) -> StatusCode {
+		self.get_code()
+	}
+
+	fn error_response(&self) -> HttpResponse {
+		HttpResponse::from(self)
+	}
+}