fix: Move thorough search through search.filters w/ workspaces (#2703)

Do not just pick first from search.filters, consider all options,
filtering based on git-root and workspaces config

Fix: atuinsh/atuin#2700
Might Fix: atuinsh/atuin#2536

Wrote a few simple unit tests, and tried it by running the client
locally. Not sure about which of "[search] filters" vs "workspaces"
should be more respected, so i made it so if workspaces = false,
regardless of whats in "[search] filters" workspace gets filtered out.

First time looking at atuins code, let me know if this needs any
changes.

edit: (from my post here:
https://github.com/atuinsh/atuin/issues/2536#issuecomment-2808053862)

```
workspaces = true
[search]
filters = [ "workspace", "directory", "session", "global" ]
```

| `^R` for the ... time| in a git repo | any other dir|
| ------------- | ------------- | ------------- |
| first  | workspace  | directory|
| second  | directory  | session|
| third| session  | global|
| fourth | global  | directory |
| fifth | workspace  | session|
| sixth  | directory  | global |


![Image](https://github.com/user-attachments/assets/33150e0a-d219-44d1-8994-b1f98accdfc3)

<!-- Thank you for making a PR! Bug fixes are always welcome, but if
you're adding a new feature or changing an existing one, we'd really
appreciate if you open an issue, post on the forum, or drop in on
Discord -->

## Checks
- [X] I am happy for maintainers to push small adjustments to this PR,
to speed up the review cycle
- [X] I have checked that there are no existing pull requests for the
same thing
- #1655 might be related, but it seems to also implement code that is
already merged, and has been open for over a year, hope its ok to
suggest this

---------

Co-authored-by: Michelle Tilley <michelle@michelletilley.net>

1 files changed, 66 insertions, 2 deletions

diff --git a/crates/atuin-client/src/settings.rs b/crates/atuin-client/src/settings.rs
index 489c1a83..87ed9383 100644
--- a/crates/atuin-client/src/settings.rs
+++ b/crates/atuin-client/src/settings.rs
@@ -735,10 +735,20 @@ impl Settings {
         None
     }
 
-    pub fn default_filter_mode(&self) -> FilterMode {
+    pub fn default_filter_mode(&self, git_root: bool) -> FilterMode {
         self.filter_mode
             .filter(|x| self.search.filters.contains(x))
-            .or(self.search.filters.first().copied())
+            .or_else(|| {
+                self.search
+                    .filters
+                    .iter()
+                    .find(|x| match (x, git_root, self.workspaces) {
+                        (FilterMode::Workspace, true, true) => true,
+                        (FilterMode::Workspace, _, _) => false,
+                        (_, _, _) => true,
+                    })
+                    .copied()
+            })
             .unwrap_or(FilterMode::Global)
     }
 
@@ -979,4 +989,58 @@ mod tests {
 
         Ok(())
     }
+
+    #[test]
+    fn can_choose_workspace_filters_when_in_git_context() -> Result<()> {
+        let mut settings = super::Settings::default();
+        settings.search.filters = vec![
+            super::FilterMode::Workspace,
+            super::FilterMode::Host,
+            super::FilterMode::Directory,
+            super::FilterMode::Session,
+            super::FilterMode::Global,
+        ];
+        settings.workspaces = true;
+
+        assert_eq!(
+            settings.default_filter_mode(true),
+            super::FilterMode::Workspace,
+        );
+
+        Ok(())
+    }
+
+    #[test]
+    fn wont_choose_workspace_filters_when_not_in_git_context() -> Result<()> {
+        let mut settings = super::Settings::default();
+        settings.search.filters = vec![
+            super::FilterMode::Workspace,
+            super::FilterMode::Host,
+            super::FilterMode::Directory,
+            super::FilterMode::Session,
+            super::FilterMode::Global,
+        ];
+        settings.workspaces = true;
+
+        assert_eq!(settings.default_filter_mode(false), super::FilterMode::Host,);
+
+        Ok(())
+    }
+
+    #[test]
+    fn wont_choose_workspace_filters_when_workspaces_disabled() -> Result<()> {
+        let mut settings = super::Settings::default();
+        settings.search.filters = vec![
+            super::FilterMode::Workspace,
+            super::FilterMode::Host,
+            super::FilterMode::Directory,
+            super::FilterMode::Session,
+            super::FilterMode::Global,
+        ];
+        settings.workspaces = false;
+
+        assert_eq!(settings.default_filter_mode(true), super::FilterMode::Host,);
+
+        Ok(())
+    }
 }