From 1d2737122e3e814998e79489f745b6d341869121 Mon Sep 17 00:00:00 2001
From: fef <owo@fef.moe>
Date: Mon, 24 Jul 2023 01:20:01 +0200
Subject: [PATCH] error: implement std's Error trait

---
 src/core/error.rs    | 15 +++++++++++++++
 src/util/crypto.rs   |  6 ++++++
 src/util/validate.rs |  2 ++
 3 files changed, 23 insertions(+)

diff --git a/src/core/error.rs b/src/core/error.rs
index 55a5e2e..c11221e 100644
--- a/src/core/error.rs
+++ b/src/core/error.rs
@@ -52,6 +52,21 @@ impl ResponseError for Error {
     }
 }
 
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            Error::BadToken(e) => Some(e),
+            Error::Crypto(e) => Some(e),
+            Error::Database(e) => Some(e),
+            Error::Invalid(e) => Some(e),
+            Error::Io(e) => Some(e),
+            Error::MalformedHeader(e) => Some(e),
+            Error::Reqwest(e) => Some(e),
+            _ => None,
+        }
+    }
+}
+
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
diff --git a/src/util/crypto.rs b/src/util/crypto.rs
index 9cdf347..bb14ca4 100644
--- a/src/util/crypto.rs
+++ b/src/util/crypto.rs
@@ -360,6 +360,12 @@ where
     }
 }
 
+impl std::error::Error for Error {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        self.0.source()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/util/validate.rs b/src/util/validate.rs
index 72436cf..f731e44 100644
--- a/src/util/validate.rs
+++ b/src/util/validate.rs
@@ -158,3 +158,5 @@ impl fmt::Display for Error {
         Ok(())
     }
 }
+
+impl std::error::Error for Error {}