From d7eded97f088da6596a8c7dcf8108ae7bf7e311f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9B=B7=E7=94=B5=E8=8A=BD=E8=A1=A3?=
 <zhangyanghaha0407@outlook.com>
Date: Fri, 8 May 2026 05:29:26 -0400
Subject: [PATCH] Track space timestamps

---
 crates/ely_browser_core/tests/spaces.rs | 47 ++++++++++++++++++++++++-
 crates/ely_domain/src/space.rs          | 25 +++++++++++++
 2 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/crates/ely_browser_core/tests/spaces.rs b/crates/ely_browser_core/tests/spaces.rs
index c7338ef..a496ef9 100644
--- a/crates/ely_browser_core/tests/spaces.rs
+++ b/crates/ely_browser_core/tests/spaces.rs
@@ -1,7 +1,7 @@
 use std::error::Error;
 
 use ely_browser_core::{BrowserCore, CoreError, InitialBrowserConfig};
-use ely_domain::{ProfileId, ProfileKind};
+use ely_domain::{ArchivePolicy, ProfileId, ProfileKind};
 
 #[test]
 fn created_space_binds_current_profile_as_default() -> Result<(), Box<dyn Error>> {
@@ -21,6 +21,21 @@ fn created_space_binds_current_profile_as_default() -> Result<(), Box<dyn Error>
     Ok(())
 }
 
+#[test]
+fn created_space_records_creation_timestamps() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+    let research_space_id = core.create_space("Research", "R", 0x9fc9a2)?;
+    let snapshot = core.snapshot()?;
+    let Some(research_space) =
+        snapshot.spaces.iter().find(|space| space.id() == &research_space_id)
+    else {
+        return Err("missing research space".into());
+    };
+
+    assert_eq!(research_space.created_at(), research_space.updated_at());
+    Ok(())
+}
+
 #[test]
 fn space_default_profile_updates_with_profile_validation() -> Result<(), Box<dyn Error>> {
     let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
@@ -44,3 +59,33 @@ fn space_default_profile_updates_with_profile_validation() -> Result<(), Box<dyn
     assert_eq!(error, CoreError::ProfileNotFound { id: missing_profile_id });
     Ok(())
 }
+
+#[test]
+fn space_settings_refresh_updated_at() -> Result<(), Box<dyn Error>> {
+    let mut core = BrowserCore::new(InitialBrowserConfig::ely_defaults()?)?;
+    let work_space_id = core.snapshot()?.active_space_id;
+    let before_update = active_space_updated_at(&core, &work_space_id)?;
+
+    core.set_space_archive_policy(&work_space_id, ArchivePolicy::IdleDays(7))?;
+    let after_archive_update = active_space_updated_at(&core, &work_space_id)?;
+
+    let research_profile_id = core.create_profile("Research", 0x9fc9a2, ProfileKind::Standard)?;
+    core.set_space_default_profile(&work_space_id, &research_profile_id)?;
+    let after_profile_update = active_space_updated_at(&core, &work_space_id)?;
+
+    assert!(after_archive_update > before_update);
+    assert!(after_profile_update > after_archive_update);
+    Ok(())
+}
+
+fn active_space_updated_at(
+    core: &BrowserCore,
+    space_id: &ely_domain::SpaceId,
+) -> Result<std::time::SystemTime, Box<dyn Error>> {
+    let snapshot = core.snapshot()?;
+    let Some(space) = snapshot.spaces.iter().find(|space| space.id() == space_id) else {
+        return Err("missing space".into());
+    };
+
+    Ok(space.updated_at())
+}
diff --git a/crates/ely_domain/src/space.rs b/crates/ely_domain/src/space.rs
index a077d76..92773bf 100644
--- a/crates/ely_domain/src/space.rs
+++ b/crates/ely_domain/src/space.rs
@@ -1,3 +1,5 @@
+use std::time::{Duration, SystemTime};
+
 use crate::{ProfileId, SpaceId};
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -14,6 +16,8 @@ pub struct Space {
     accent_hex: u32,
     default_profile_id: ProfileId,
     archive_policy: ArchivePolicy,
+    created_at: SystemTime,
+    updated_at: SystemTime,
 }
 
 impl Space {
@@ -24,6 +28,7 @@ impl Space {
         accent_hex: u32,
         default_profile_id: ProfileId,
     ) -> Self {
+        let created_at = SystemTime::now();
         Self {
             id: SpaceId::new(),
             name: name.into(),
@@ -31,6 +36,8 @@ impl Space {
             accent_hex,
             default_profile_id,
             archive_policy: ArchivePolicy::Manual,
+            created_at,
+            updated_at: created_at,
         }
     }
 
@@ -61,6 +68,7 @@ impl Space {
 
     pub fn set_default_profile_id(&mut self, profile_id: ProfileId) {
         self.default_profile_id = profile_id;
+        self.record_update();
     }
 
     #[must_use]
@@ -70,5 +78,22 @@ impl Space {
 
     pub fn set_archive_policy(&mut self, archive_policy: ArchivePolicy) {
         self.archive_policy = archive_policy;
+        self.record_update();
+    }
+
+    #[must_use]
+    pub fn created_at(&self) -> SystemTime {
+        self.created_at
+    }
+
+    #[must_use]
+    pub fn updated_at(&self) -> SystemTime {
+        self.updated_at
+    }
+
+    fn record_update(&mut self) {
+        let now = SystemTime::now();
+        self.updated_at =
+            if now > self.updated_at { now } else { self.updated_at + Duration::from_nanos(1) };
     }
 }