From ab23761e090b8ab6311a360eada7131f6663a3bf Mon Sep 17 00:00:00 2001
From: Santo Cariotti <santo@dcariotti.me>
Date: Thu, 1 Sep 2022 18:45:04 +0200
Subject: Fork from m6-ie project

---
 src/errors.rs | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 src/errors.rs

(limited to 'src/errors.rs')

diff --git a/src/errors.rs b/src/errors.rs
new file mode 100644
index 0000000..e541eda
--- /dev/null
+++ b/src/errors.rs
@@ -0,0 +1,63 @@
+use axum::{
+    http::StatusCode,
+    response::{IntoResponse, Response},
+    Json,
+};
+use serde_json::json;
+
+/// All errors raised by the web app
+pub enum AppError {
+    /// Generic error, never called yet
+    Generic,
+    /// Database error
+    Database,
+    /// Generic bad request. It is handled with a message value
+    BadRequest(String),
+    /// Not found error
+    NotFound,
+    /// Raised when a token is not good created
+    TokenCreation,
+    /// Raised when a passed token is not valid
+    InvalidToken,
+}
+
+/// Use `AppError` as response for an endpoint
+impl IntoResponse for AppError {
+    /// Matches `AppError` into a tuple of status and error message.
+    /// The response will be a JSON in the format of:
+    /// ```json
+    /// { "error": "<message>" }
+    /// ```
+    fn into_response(self) -> Response {
+        let (status, error_message) = match self {
+            AppError::Generic => (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                "Generic error, can't find why".to_string(),
+            ),
+            AppError::Database => (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                "Error with database connection".to_string(),
+            ),
+            AppError::BadRequest(value) => (StatusCode::BAD_REQUEST, value),
+            AppError::NotFound => (StatusCode::NOT_FOUND, "Element not found".to_string()),
+            AppError::TokenCreation => (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                "Token creation error".to_string(),
+            ),
+            AppError::InvalidToken => (StatusCode::BAD_REQUEST, "Invalid token".to_string()),
+        };
+
+        let body = Json(json!({
+            "error": error_message,
+        }));
+
+        (status, body).into_response()
+    }
+}
+
+/// Transforms a `sqlx::Error` into a `AppError::Databse` error
+impl From<sqlx::Error> for AppError {
+    fn from(_error: sqlx::Error) -> AppError {
+        AppError::Database
+    }
+}
-- 
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