From cce6662d635bb2115f9f2a7bab92cc105166e761 Mon Sep 17 00:00:00 2001
From: Owen Jacobson <owen@grimoire.ca>
Date: Wed, 18 Sep 2024 01:27:47 -0400
Subject: App methods now return errors that allow not-found cases to be
 distinguished.

---
 src/repo/error.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/repo/error.rs

(limited to 'src/repo/error.rs')

diff --git a/src/repo/error.rs b/src/repo/error.rs
new file mode 100644
index 0000000..a5961e2
--- /dev/null
+++ b/src/repo/error.rs
@@ -0,0 +1,23 @@
+pub trait NotFound {
+    type Ok;
+    fn not_found<E, F>(self, map: F) -> Result<Self::Ok, E>
+    where
+        E: From<sqlx::Error>,
+        F: FnOnce() -> E;
+}
+
+impl<T> NotFound for Result<T, sqlx::Error> {
+    type Ok = T;
+
+    fn not_found<E, F>(self, map: F) -> Result<T, E>
+    where
+        E: From<sqlx::Error>,
+        F: FnOnce() -> E,
+    {
+        match self {
+            Err(sqlx::Error::RowNotFound) => Err(map()),
+            Err(other) => Err(other.into()),
+            Ok(value) => Ok(value),
+        }
+    }
+}
-- 
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