1 files changed, 46 insertions, 0 deletions
diff --git a/cache/src/helper.rs b/cache/src/helper.rs
new file mode 100644
index 0000000..8f73e1e
--- /dev/null
+++ b/cache/src/helper.rs
@@ -0,0 +1,46 @@
+/*
+    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
+    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
+    Copyright (C) 2025 metamuffin <metamuffin.org>
+*/
+
+use base64::{Engine, prelude::BASE64_URL_SAFE};
+use sha2::Sha256;
+use std::{
+    fmt::Display,
+    hash::{Hash, Hasher},
+};
+
+pub struct HashKey<T>(pub T);
+impl<T: Hash> Display for HashKey<T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        use sha2::Digest;
+        struct ShaHasher(Sha256);
+        impl Hasher for ShaHasher {
+            fn finish(&self) -> u64 {
+                unreachable!()
+            }
+            fn write(&mut self, bytes: &[u8]) {
+                self.0.update(bytes);
+            }
+        }
+        let mut d = ShaHasher(sha2::Sha256::new());
+        self.0.hash(&mut d);
+        let d = d.0.finalize();
+        f.write_str(&BASE64_URL_SAFE.encode(d))
+    }
+}
+
+pub struct EscapeKey<T>(pub T);
+impl<T: Display> Display for EscapeKey<T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            percent_encoding::utf8_percent_encode(
+                &self.0.to_string(),
+                percent_encoding::NON_ALPHANUMERIC,
+            )
+        )
+    }
+}