added settings + non blocking ui actions

crates/pdfs-core/src/cache.rs

@@ -20,6 +20,7 @@ use std::collections::{BTreeMap, HashSet};
 use std::io::{Read, Seek, SeekFrom};
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
+use std::sync::atomic::{AtomicU64, Ordering};
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use proton_drive_rs::proton_sdk::ids::NodeUid;
@@ -100,8 +101,10 @@ pub struct ContentCache {
     /// Soft cap on total blob bytes. Exceeded only transiently: a `store`
     /// evicts least-recently-used *unpinned* blobs back under the cap. `0`
     /// disables the cap. Pinned blobs are never evicted, so pins alone may push
-    /// the cache over budget.
-    max_bytes: u64,
+    /// the cache over budget. Atomic so the daemon can retune it at runtime
+    /// (a Settings-page change) via [`set_budget`](Self::set_budget) without
+    /// taking a lock on every cache read.
+    max_bytes: AtomicU64,
     /// Unified metadata DB. Its `cache_entries` table is the LRU index: every
     /// store/read/evict updates it, and the budget enforcers query it instead of
     /// scanning the cache directories (plan.md P4).
@@ -139,7 +142,7 @@ impl ContentCache {
             block_dir,
             scratch_dir,
             pins_path,
-            max_bytes,
+            max_bytes: AtomicU64::new(max_bytes),
             db,
         };
         cache.reconcile()?;
@@ -366,7 +369,8 @@ impl ContentCache {
     /// `max_bytes`. No-op when the cap is disabled (`0`). All blocks are
     /// evictable — pinned files are served from whole-file blobs, never blocks.
     fn enforce_block_budget(&self) {
-        if self.max_bytes == 0 {
+        let cap = self.cap();
+        if cap == 0 {
             return;
         }
         // LRU-ordered (oldest first) block entries straight from the index — no
@@ -376,11 +380,11 @@ impl ContentCache {
             return;
         };
         let mut total: u64 = entries.iter().map(|(_, size)| *size).sum();
-        if total <= self.max_bytes {
+        if total <= cap {
             return;
         }
         for (key, size) in entries {
-            if total <= self.max_bytes {
+            if total <= cap {
                 break;
             }
             // `key` is the block file's name (and its `.meta` sibling's stem).
@@ -517,7 +521,8 @@ impl ContentCache {
     /// cache already fits. Pinned blobs are skipped, so a cache held entirely by
     /// pins can legitimately stay over budget.
     fn enforce_budget(&self) {
-        if self.max_bytes == 0 {
+        let cap = self.cap();
+        if cap == 0 {
             return;
         }
         // Pinned blobs (by cache key) are exempt from eviction. Resolves direct
@@ -538,11 +543,11 @@ impl ContentCache {
             return;
         };
         let mut total: u64 = entries.iter().map(|(_, size)| *size).sum();
-        if total <= self.max_bytes {
+        if total <= cap {
             return;
         }
         for (key, size) in entries {
-            if total <= self.max_bytes {
+            if total <= cap {
                 break;
             }
             if pinned.contains(&key) {
@@ -624,7 +629,61 @@ impl ContentCache {
     /// Configured soft byte cap (`0` = unlimited), for display alongside
     /// [`usage`](Self::usage).
     pub fn budget(&self) -> u64 {
-        self.max_bytes
+        self.cap()
+    }
+
+    /// The current soft byte cap. A plain atomic load; the value can change
+    /// under [`set_budget`](Self::set_budget) while the daemon runs.
+    fn cap(&self) -> u64 {
+        self.max_bytes.load(Ordering::Relaxed)
+    }
+
+    /// Retune the soft byte cap (`0` = unlimited) at runtime and immediately
+    /// enforce it: blobs and blocks are LRU-evicted back under the new cap (a
+    /// lower cap frees space now; a higher one is a no-op until the next store).
+    /// Called by the daemon when the Settings page changes the cache budget.
+    pub fn set_budget(&self, bytes: u64) {
+        self.max_bytes.store(bytes, Ordering::Relaxed);
+        self.enforce_budget();
+        self.enforce_block_budget();
+    }
+
+    /// Delete every *unpinned* cached blob plus all on-demand block chunks,
+    /// keeping pinned files intact. Pinned files keep their whole-file blobs
+    /// (and are never served from blocks), so dropping all blocks is safe.
+    /// Returns the number of bytes freed, for a user-facing confirmation.
+    pub fn clear_unpinned(&self) -> u64 {
+        // Pinned blobs are exempt; resolve them to cache keys to match filenames.
+        let pinned: HashSet<String> = self
+            .db
+            .pinned_uids()
+            .unwrap_or_default()
+            .iter()
+            .map(|uid| Self::key_str(uid))
+            .collect();
+        let mut freed = 0u64;
+        // Unpinned whole-file blobs.
+        if let Ok(entries) = self.db.cache_entries_by_kind(KIND_BLOB) {
+            for (key, size) in entries {
+                if pinned.contains(&key) {
+                    continue;
+                }
+                let _ = std::fs::remove_file(self.content_dir.join(&key));
+                let _ = std::fs::remove_file(self.content_dir.join(format!("{key}.meta")));
+                let _ = self.db.cache_remove(&key);
+                freed = freed.saturating_add(size);
+            }
+        }
+        // Every on-demand block (transient partial reads, re-fetched on demand).
+        if let Ok(entries) = self.db.cache_entries_by_kind(KIND_BLOCK) {
+            for (key, size) in entries {
+                let _ = std::fs::remove_file(self.block_dir.join(&key));
+                let _ = std::fs::remove_file(self.block_dir.join(format!("{key}.meta")));
+                let _ = self.db.cache_remove(&key);
+                freed = freed.saturating_add(size);
+            }
+        }
+        freed
     }
 }
 
@@ -822,6 +881,43 @@ mod tests {
         assert!(c.is_cached(&d, 1, 4));
     }
 
+    #[test]
+    fn clear_unpinned_keeps_pinned() {
+        let (c, _d) = cache();
+        let (a, b) = (uid("a"), uid("b"));
+        c.store(&a, 1, 4, b"aaaa").unwrap();
+        c.add_pin(&a, Path::new("a"), false).unwrap();
+        c.store(&b, 1, 4, b"bbbb").unwrap();
+        // A stray on-demand block of the unpinned file is purged too.
+        c.store_block(&b, 1, 8, 0, b"bbbb").unwrap();
+
+        let freed = c.clear_unpinned();
+        assert_eq!(freed, 8, "one 4-byte blob + one 4-byte block freed");
+        assert!(c.is_cached(&a, 1, 4), "pinned blob survives purge");
+        assert!(!c.is_cached(&b, 1, 4), "unpinned blob purged");
+        assert!(c.cached_block(&b, 1, 8, 0).is_none(), "block purged");
+    }
+
+    #[test]
+    fn set_budget_evicts_immediately() {
+        // Start unlimited so three blobs all fit, then tighten the cap.
+        let (c, _d) = cache();
+        let (a, b, d) = (uid("a"), uid("b"), uid("d"));
+        c.store(&a, 1, 4, b"aaaa").unwrap();
+        std::thread::sleep(std::time::Duration::from_millis(10));
+        c.store(&b, 1, 4, b"bbbb").unwrap();
+        std::thread::sleep(std::time::Duration::from_millis(10));
+        c.store(&d, 1, 4, b"dddd").unwrap();
+
+        // Tightening to 8 bytes evicts the LRU unpinned blob(s) now, not on the
+        // next store.
+        c.set_budget(8);
+        assert!(!c.is_cached(&a, 1, 4), "oldest blob evicted on tighten");
+        assert!(c.is_cached(&b, 1, 4));
+        assert!(c.is_cached(&d, 1, 4));
+        assert_eq!(c.budget(), 8);
+    }
+
     #[test]
     fn thumbnail_store_read_and_evict() {
         let (c, _d) = cache();

crates/pdfs-core/src/config.rs

@@ -24,6 +24,16 @@ pub const DEFAULT_CACHE_BUDGET_BYTES: u64 = 5 * 1024 * 1024 * 1024;
 pub struct AppConfig {
     pub app_version: String,
     pub user_agent: String,
+    /// Soft cap on the on-disk content cache, in bytes (`0` = unlimited).
+    /// `None` means "use [`DEFAULT_CACHE_BUDGET_BYTES`]"; the Settings page
+    /// writes an explicit value here. Defaulted for configs predating the field.
+    #[serde(default)]
+    pub cache_budget: Option<u64>,
+    /// Mountpoint the daemon mounts at. `None` means
+    /// [`AppDirs::default_mountpoint`]; the Settings page writes an explicit
+    /// path here. Defaulted for configs predating the field.
+    #[serde(default)]
+    pub mountpoint: Option<String>,
 }
 
 impl Default for AppConfig {
@@ -31,10 +41,20 @@ impl Default for AppConfig {
         Self {
             app_version: APP_VERSION.to_string(),
             user_agent: USER_AGENT.to_string(),
+            cache_budget: None,
+            mountpoint: None,
         }
     }
 }
 
+impl AppConfig {
+    /// The effective cache budget in bytes: the user's explicit choice, or
+    /// [`DEFAULT_CACHE_BUDGET_BYTES`] when unset.
+    pub fn resolved_cache_budget(&self) -> u64 {
+        self.cache_budget.unwrap_or(DEFAULT_CACHE_BUDGET_BYTES)
+    }
+}
+
 /// Resolved XDG locations for state, cache, and the default mountpoint.
 pub struct AppDirs {
     dirs: ProjectDirs,
@@ -70,6 +90,18 @@ impl AppDirs {
         default_config
     }
 
+    /// Persist `config` to [`config_path`](Self::config_path), creating the
+    /// config dir if missing. The Settings page calls this after editing the
+    /// cache budget or mountpoint; the daemon re-reads the file on its next mount.
+    pub fn save_config(&self, config: &AppConfig) -> Result<()> {
+        let path = self.config_path();
+        if let Some(parent) = path.parent() {
+            std::fs::create_dir_all(parent)?;
+        }
+        std::fs::write(&path, serde_json::to_string_pretty(config)?)?;
+        Ok(())
+    }
+
     /// Persistent state: inode map / cache index DB lives here.
     pub fn state_dir(&self) -> PathBuf {
         // `state_dir` is Linux-only in `directories`; fall back to data dir.
@@ -117,6 +149,16 @@ impl AppDirs {
             .unwrap_or_else(|| PathBuf::from("/tmp/ProtonDrive"))
     }
 
+    /// The effective mountpoint: the config's explicit path, or
+    /// [`default_mountpoint`](Self::default_mountpoint) when unset.
+    pub fn resolved_mountpoint(&self, config: &AppConfig) -> PathBuf {
+        config
+            .mountpoint
+            .as_ref()
+            .map(PathBuf::from)
+            .unwrap_or_else(|| self.default_mountpoint())
+    }
+
     /// Create state + cache dirs if missing.
     pub fn ensure(&self) -> Result<()> {
         std::fs::create_dir_all(self.state_dir())?;
@@ -135,6 +177,8 @@ mod tests {
         let config = AppConfig {
             app_version: "external-drive-test-client@1.0.0".to_string(),
             user_agent: "test-agent/1.0".to_string(),
+            cache_budget: Some(1234),
+            mountpoint: Some("/tmp/x".to_string()),
         };
         let json = serde_json::to_string(&config).unwrap();
         let decoded: AppConfig = serde_json::from_str(&json).unwrap();

crates/pdfs-core/src/control.rs

@@ -63,6 +63,32 @@ pub enum Request {
     /// Full-text search node names against the daemon's local metadata index.
     /// `limit` caps the number of hits returned. Replies with [`Response::SearchResults`].
     Search { query: String, limit: usize },
+    /// Rename a file or folder. `path` is mountpoint-relative; `new_name` is a
+    /// single path component (no separators). Replies with [`Response::Ok`].
+    Rename { path: String, new_name: String },
+    /// Move a file or folder into a new parent folder. Both `path` and
+    /// `new_parent` are mountpoint-relative. Replies with [`Response::Ok`].
+    Move { path: String, new_parent: String },
+    /// Trash a file or folder. `path` is mountpoint-relative. Replies with
+    /// [`Response::Ok`].
+    Delete { path: String },
+    /// Create a new folder named `name` under the mountpoint-relative `parent`.
+    /// Replies with [`Response::Ok`].
+    CreateFolder { parent: String, name: String },
+    /// Upload a file named `name` with content `bytes` into the
+    /// mountpoint-relative `parent` folder. Replies with [`Response::Ok`].
+    UploadFile {
+        parent: String,
+        name: String,
+        bytes: Vec<u8>,
+    },
+    /// Delete all unpinned cached blobs and on-demand blocks, keeping pinned
+    /// files intact. Replies with [`Response::Ok`] reporting the bytes freed.
+    PurgeCache,
+    /// Retune the on-disk cache's soft byte cap at runtime (`0` = unlimited) and
+    /// persist it to config so the next mount keeps it. Replies with
+    /// [`Response::Ok`].
+    SetCacheBudget { bytes: u64 },
 }
 
 /// One entry in a [`Request::ListDir`] listing.
@@ -77,6 +103,11 @@ pub struct DirEntry {
     pub modified: i64,
     /// Whether the file is pinned to this device.
     pub pinned: bool,
+    /// Whether the file's full content is present in the local cache (a current,
+    /// non-stale blob). Always false for folders. Defaulted for wire-compat with
+    /// clients/daemons predating the field.
+    #[serde(default)]
+    pub cached: bool,
     /// Node uid in `volume~link` form, for follow-up requests.
     pub uid: String,
     /// Full mountpoint-relative path. Empty for a [`Request::ListDir`] listing
@@ -168,3 +199,43 @@ pub fn send(socket: &Path, req: &Request) -> Result<Response> {
     reader.read_line(&mut resp)?;
     Ok(serde_json::from_str(resp.trim())?)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// The mutation requests must survive a line-delimited JSON round-trip, since
+    /// that is exactly how they cross the control socket.
+    #[test]
+    fn mutation_requests_roundtrip() {
+        let reqs = [
+            Request::Rename {
+                path: "a/b.txt".into(),
+                new_name: "c.txt".into(),
+            },
+            Request::Move {
+                path: "a/b.txt".into(),
+                new_parent: "d".into(),
+            },
+            Request::Delete {
+                path: "a/b.txt".into(),
+            },
+            Request::CreateFolder {
+                parent: "a".into(),
+                name: "new".into(),
+            },
+            Request::UploadFile {
+                parent: "a".into(),
+                name: "f.bin".into(),
+                bytes: vec![0, 1, 2, 255],
+            },
+        ];
+        for req in reqs {
+            let line = serde_json::to_string(&req).unwrap();
+            assert!(!line.contains('\n'), "wire form must be a single line");
+            let back: Request = serde_json::from_str(&line).unwrap();
+            // Round-trip is lossless: re-serializing yields the same bytes.
+            assert_eq!(line, serde_json::to_string(&back).unwrap());
+        }
+    }
+}

crates/pdfs-core/src/service.rs

@@ -79,6 +79,26 @@ pub fn is_failed() -> bool {
     systemctl_query(&["is-failed"])
 }
 
+/// Whether the unit is enabled to start on login/boot. `systemctl is-enabled`
+/// exits 0 only for an enabled unit, so the Settings page can render the
+/// "Start on login" switch in its true state.
+pub fn is_enabled() -> bool {
+    systemctl_query(&["is-enabled"])
+}
+
+/// Enable the service so it auto-starts on future logins, without necessarily
+/// starting it now beyond what `enable` does. Used by the Settings "Start on
+/// login" switch; pairs with [`disable`](disable).
+pub fn enable() -> bool {
+    systemctl(&["enable"])
+}
+
+/// Disable auto-start without stopping the running mount. Used by the Settings
+/// "Start on login" switch turning off; the current session stays mounted.
+pub fn disable() -> bool {
+    systemctl(&["disable"])
+}
+
 /// Disable the service so it no longer auto-starts, and stop it now. Called on
 /// logout.
 pub fn disable_stop() -> bool {