new db backend

1 files changed, 31 insertions, 0 deletions

diff --git a/database/src/backends/memory.rs b/database/src/backends/memory.rs
new file mode 100644
index 0000000..97c8c2c
--- /dev/null
+++ b/database/src/backends/memory.rs
@@ -0,0 +1,31 @@
+/*
+    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 crate::backends::DatabaseStorage;
+use anyhow::Result;
+use std::{collections::BTreeMap, sync::RwLock};
+
+pub struct Memory(RwLock<BTreeMap<Vec<u8>, Vec<u8>>>);
+
+impl DatabaseStorage for Memory {
+    fn set(&self, key: &[u8], value: &[u8]) -> Result<()> {
+        self.0.write().unwrap().insert(key.to_vec(), value.to_vec());
+        Ok(())
+    }
+    fn get<'a>(&'a self, key: &[u8]) -> Result<Option<Vec<u8>>> {
+        Ok(self.0.read().unwrap().get(key).cloned())
+    }
+    fn next(&self, key: &[u8]) -> Result<Option<Vec<u8>>> {
+        let r = self.0.read().unwrap();
+        Ok(r.range(key.to_vec()..).next().map(|(k, _)| k.to_owned()))
+    }
+    fn prev(&self, key: &[u8]) -> Result<Option<Vec<u8>>> {
+        let r = self.0.read().unwrap();
+        Ok(r.range(..key.to_vec())
+            .next_back()
+            .map(|(k, _)| k.to_owned()))
+    }
+}