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use std::{
path::{Path, PathBuf},
sync::atomic::{AtomicU64, Ordering},
};
static NEXT_TEMP_FILE: AtomicU64 = AtomicU64::new(1);
use serde::{Deserialize, Serialize};
#[derive(Clone, Debug, Deserialize, Serialize)]
pub(super) struct ClientRemoteCollapsedGroups {
pub(super) profile_id: String,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub(super) collapsed_groups: Vec<String>,
}
#[derive(Clone, Debug, Default, Deserialize, Serialize)]
pub(super) struct ClientChromePreferences {
#[serde(default, skip_serializing_if = "Option::is_none")]
pub(super) sidebar_width: Option<u16>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub(super) sidebar_section_split: Option<f32>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub(super) sidebar_collapsed: Option<bool>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub(super) agent_panel_sort: Option<crate::config::AgentPanelSortConfig>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub(super) collapsed_groups: Vec<String>,
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub(super) remote_collapsed_groups: Vec<ClientRemoteCollapsedGroups>,
}
pub(super) fn path_for_local_endpoint(socket_path: &Path) -> PathBuf {
let mut hash = 0xcbf29ce484222325u64;
for byte in socket_path.to_string_lossy().as_bytes() {
hash ^= u64::from(*byte);
hash = hash.wrapping_mul(0x100000001b3);
}
crate::config::state_dir()
.join("client-shell")
.join(format!("local-{hash:016x}.json"))
}
pub(super) fn load(path: &Path) -> Option<ClientChromePreferences> {
let content = std::fs::read_to_string(path).ok()?;
serde_json::from_str(&content).ok()
}
pub(super) fn store(path: &Path, preferences: ClientChromePreferences) -> Result<(), String> {
let parent = path
.parent()
.ok_or_else(|| format!("invalid client shell state path: {}", path.display()))?;
std::fs::create_dir_all(parent)
.map_err(|error| format!("failed to create client shell state directory: {error}"))?;
let content = serde_json::to_vec_pretty(&preferences)
.map_err(|error| format!("failed to encode client shell state: {error}"))?;
let sequence = NEXT_TEMP_FILE.fetch_add(1, Ordering::Relaxed);
let mut temp_name = path
.file_name()
.ok_or_else(|| format!("invalid client shell state path: {}", path.display()))?
.to_os_string();
temp_name.push(format!(".tmp-{}-{sequence}", std::process::id()));
let temp_path = parent.join(temp_name);
std::fs::write(&temp_path, content)
.map_err(|error| format!("failed to write client shell state: {error}"))?;
std::fs::rename(&temp_path, path).map_err(|error| {
let _ = std::fs::remove_file(&temp_path);
format!("failed to replace client shell state: {error}")
})
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn endpoint_paths_are_stable_and_distinct() {
let first = path_for_local_endpoint(Path::new("/run/herdr/one.sock"));
let again = path_for_local_endpoint(Path::new("/run/herdr/one.sock"));
let second = path_for_local_endpoint(Path::new("/run/herdr/two.sock"));
assert_eq!(first, again);
assert_ne!(first, second);
}
#[test]
fn legacy_preferences_default_remote_collapses() {
let preferences: ClientChromePreferences =
serde_json::from_str(r#"{"collapsed_groups":["/repo"]}"#)
.expect("legacy client chrome preferences");
assert_eq!(preferences.collapsed_groups, ["/repo"]);
assert!(preferences.remote_collapsed_groups.is_empty());
}
#[test]
fn concurrent_stores_leave_complete_preferences() {
let path = std::env::temp_dir().join(format!(
"herdr-shell-concurrent-preferences-{}.json",
std::process::id()
));
let _ = std::fs::remove_file(&path);
let writers = (20..28)
.map(|width| {
let path = path.clone();
std::thread::spawn(move || {
store(
&path,
ClientChromePreferences {
sidebar_width: Some(width),
..ClientChromePreferences::default()
},
)
})
})
.collect::<Vec<_>>();
for writer in writers {
writer.join().expect("preference writer").expect("store");
}
assert!(load(&path)
.and_then(|saved| saved.sidebar_width)
.is_some_and(|width| (20..28).contains(&width)));
std::fs::remove_file(path).expect("remove preferences");
}
#[test]
fn repeated_store_replaces_existing_preferences() {
let path = std::env::temp_dir().join(format!(
"herdr-shell-preferences-{}.json",
std::process::id()
));
let _ = std::fs::remove_file(&path);
store(
&path,
ClientChromePreferences {
sidebar_width: Some(24),
..ClientChromePreferences::default()
},
)
.expect("first preference store");
store(
&path,
ClientChromePreferences {
sidebar_width: Some(32),
..ClientChromePreferences::default()
},
)
.expect("replacement preference store");
assert_eq!(load(&path).and_then(|saved| saved.sidebar_width), Some(32));
std::fs::remove_file(path).expect("remove preferences");
}
}
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