From 314bca18a43e22368a87fcad53d91190fe101b60 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Fri, 7 Feb 2025 16:10:29 +0100
Subject: nodes modified since endpoint

---
 base/src/database.rs | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

(limited to 'base/src')

diff --git a/base/src/database.rs b/base/src/database.rs
index c0699f0..54ead92 100644
--- a/base/src/database.rs
+++ b/base/src/database.rs
@@ -4,7 +4,7 @@
     Copyright (C) 2025 metamuffin <metamuffin.org>
 */
 use anyhow::{anyhow, bail, Context, Result};
-use bincode::{Decode, Encode};
+use bincode::{config::standard, Decode, Encode};
 use jellycommon::{
     user::{NodeUserData, User},
     Node, NodeID,
@@ -13,6 +13,7 @@ use log::info;
 use redb::{Durability, ReadableTable, StorageError, TableDefinition};
 use std::{
     fs::create_dir_all,
+    hash::{DefaultHasher, Hasher},
     path::Path,
     sync::{Arc, RwLock},
     time::SystemTime,
@@ -164,7 +165,17 @@ impl Database {
         let mut t_node_children = txn.open_table(T_NODE_CHILDREN)?;
         let mut t_node_external_id = txn.open_table(T_NODE_EXTERNAL_ID)?;
         let mut node = t_node.get(id.0)?.map(|v| v.value().0).unwrap_or_default();
+
+        let mut dh_before = HashWriter(DefaultHasher::new());
+        bincode::encode_into_writer(&node, &mut dh_before, standard()).unwrap();
         update(&mut node)?;
+        let mut dh_after = HashWriter(DefaultHasher::new());
+        bincode::encode_into_writer(&node, &mut dh_after, standard()).unwrap();
+
+        if dh_before.0.finish() == dh_after.0.finish() {
+            return Ok(());
+        }
+
         for parent in &node.parents {
             t_node_children.insert((parent.0, id.0), ())?;
         }
@@ -463,6 +474,14 @@ impl NodeTextSearchIndex {
     }
 }
 
+pub struct HashWriter(DefaultHasher);
+impl bincode::enc::write::Writer for HashWriter {
+    fn write(&mut self, bytes: &[u8]) -> std::result::Result<(), bincode::error::EncodeError> {
+        self.0.write(bytes);
+        Ok(())
+    }
+}
+
 #[derive(Debug)]
 #[cfg(not(feature = "db_json"))]
 pub struct Ser<T>(pub T);
-- 
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