feat: add cache IPC commands for analysis caching

Co-authored-by: Cursor <cursoragent@cursor.com>

src-tauri/src/commands/cache.rs

@@ -0,0 +1,153 @@
+use crate::models::{ThumbnailSpritesheet, WaveformTiers};
+use crate::services::cache_manager::{self, CacheManifest, CacheStats};
+use serde::Serialize;
+
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CachedAnalysis {
+    pub waveform_tiers: Option<WaveformTiers>,
+    pub keyframe_positions: Vec<f64>,
+    pub thumbnail_spritesheets: Vec<ThumbnailSpritesheet>,
+    pub caption_file_path: Option<String>,
+}
+
+#[tauri::command]
+pub async fn load_cached_analysis(url: String) -> Option<CachedAnalysis> {
+    let url_clone = url.clone();
+    let manifest = tokio::task::spawn_blocking(move || cache_manager::load_manifest(&url_clone))
+        .await
+        .ok()
+        .flatten()?;
+
+    let cache_dir = cache_manager::cache_dir_for_url(&url);
+
+    // Resolve relative paths in thumbnail spritesheets to absolute paths
+    let spritesheets: Vec<ThumbnailSpritesheet> = manifest
+        .thumbnail_spritesheets
+        .into_iter()
+        .map(|mut sheet| {
+            let abs_path = cache_dir.join(&sheet.file_path);
+            sheet.file_path = abs_path.to_string_lossy().to_string();
+            sheet
+        })
+        .collect();
+
+    // Verify thumbnail files actually exist on disk
+    let thumbs_valid = if spritesheets.is_empty() {
+        false
+    } else {
+        let first_dir = std::path::Path::new(&spritesheets[0].file_path);
+        first_dir.is_dir()
+    };
+
+    // Resolve caption path to absolute
+    let caption_path = manifest
+        .caption_file_path
+        .map(|rel| cache_dir.join(&rel).to_string_lossy().to_string())
+        .filter(|p| std::path::Path::new(p).is_file());
+
+    Some(CachedAnalysis {
+        waveform_tiers: manifest.waveform_tiers,
+        keyframe_positions: manifest.keyframe_positions,
+        thumbnail_spritesheets: if thumbs_valid {
+            spritesheets
+        } else {
+            vec![]
+        },
+        caption_file_path: caption_path,
+    })
+}
+
+#[tauri::command]
+pub async fn save_analysis_to_cache(
+    url: String,
+    title: String,
+    duration: f64,
+    fps: f64,
+    waveform_tiers: Option<WaveformTiers>,
+    keyframe_positions: Vec<f64>,
+    thumbnail_spritesheets: Vec<ThumbnailSpritesheet>,
+    caption_file_path: Option<String>,
+) -> Result<(), String> {
+    let cache_dir = cache_manager::cache_dir_for_url(&url);
+
+    // Convert absolute spritesheet paths to relative
+    let relative_sheets: Vec<ThumbnailSpritesheet> = thumbnail_spritesheets
+        .into_iter()
+        .map(|mut sheet| {
+            if let Ok(rel) = std::path::Path::new(&sheet.file_path).strip_prefix(&cache_dir) {
+                sheet.file_path = rel.to_string_lossy().to_string();
+            }
+            sheet
+        })
+        .collect();
+
+    // Convert absolute caption path to relative
+    let relative_caption = caption_file_path.and_then(|abs| {
+        std::path::Path::new(&abs)
+            .strip_prefix(&cache_dir)
+            .ok()
+            .map(|rel| rel.to_string_lossy().to_string())
+    });
+
+    let now = format!(
+        "{}",
+        std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)
+            .unwrap_or_default()
+            .as_secs()
+    );
+
+    let manifest = CacheManifest {
+        version: 1,
+        source_url: url.clone(),
+        title,
+        duration,
+        fps,
+        created_at: now.clone(),
+        last_accessed_at: now,
+        waveform_tiers,
+        keyframe_positions,
+        thumbnail_spritesheets: relative_sheets,
+        caption_file_path: relative_caption,
+    };
+
+    tokio::task::spawn_blocking(move || cache_manager::save_manifest(&url, &manifest))
+        .await
+        .map_err(|e| format!("Task failed: {e}"))?
+}
+
+#[tauri::command]
+pub async fn clear_video_cache(url: String) -> Result<(), String> {
+    tokio::task::spawn_blocking(move || cache_manager::clear_cache_entry(&url))
+        .await
+        .map_err(|e| format!("Task failed: {e}"))?
+}
+
+#[tauri::command]
+pub async fn clear_all_cache() -> Result<(), String> {
+    tokio::task::spawn_blocking(cache_manager::clear_all_cache)
+        .await
+        .map_err(|e| format!("Task failed: {e}"))?
+}
+
+#[tauri::command]
+pub async fn get_cache_stats() -> Result<CacheStats, String> {
+    tokio::task::spawn_blocking(cache_manager::get_cache_stats)
+        .await
+        .map_err(|e| format!("Task failed: {e}"))?
+}
+
+#[tauri::command]
+pub fn get_thumbnail_cache_dir(url: String) -> String {
+    let dir = cache_manager::thumbnail_cache_dir(&url);
+    std::fs::create_dir_all(&dir).ok();
+    dir.to_string_lossy().to_string()
+}
+
+#[tauri::command]
+pub fn get_caption_cache_dir(url: String) -> String {
+    let dir = cache_manager::caption_cache_dir(&url);
+    std::fs::create_dir_all(&dir).ok();
+    dir.to_string_lossy().to_string()
+}

src-tauri/src/commands/mod.rs

@@ -1,3 +1,4 @@
+pub mod cache;
 pub mod dependencies;
 pub mod export;
 pub mod media_analysis;

src-tauri/src/lib.rs

@@ -5,7 +5,7 @@ mod services;
 use std::collections::HashSet;
 use std::path::PathBuf;
 
-use commands::{dependencies, export, media_analysis, video};
+use commands::{cache, dependencies, export, media_analysis, video};
 use tauri::Manager;
 
 struct MediaServerPort(u16);
@@ -123,6 +123,13 @@ pub fn run() {
             media_analysis::check_embedded_subtitles,
             media_analysis::list_system_fonts,
             export::export_clips,
+            cache::load_cached_analysis,
+            cache::save_analysis_to_cache,
+            cache::clear_video_cache,
+            cache::clear_all_cache,
+            cache::get_cache_stats,
+            cache::get_thumbnail_cache_dir,
+            cache::get_caption_cache_dir,
             get_media_server_port,
         ])
         .run(tauri::generate_context!())