654 lines
23 KiB
Rust
654 lines
23 KiB
Rust
use crate::settings::{get_settings, write_settings};
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use anyhow::Result;
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use flate2::read::GzDecoder;
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use futures_util::StreamExt;
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use serde::{Deserialize, Serialize};
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use std::collections::HashMap;
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use std::fs;
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use std::fs::File;
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use std::io::Write;
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use std::path::PathBuf;
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use std::sync::Mutex;
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use tar::Archive;
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use tauri::{AppHandle, Emitter, Manager};
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub enum EngineType {
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Whisper,
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Parakeet,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct ModelInfo {
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pub id: String,
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pub name: String,
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pub description: String,
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pub filename: String,
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pub url: Option<String>,
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pub size_mb: u64,
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pub is_downloaded: bool,
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pub is_downloading: bool,
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pub partial_size: u64,
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pub is_directory: bool,
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pub engine_type: EngineType,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct DownloadProgress {
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pub model_id: String,
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pub downloaded: u64,
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pub total: u64,
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pub percentage: f64,
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}
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pub struct ModelManager {
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app_handle: AppHandle,
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models_dir: PathBuf,
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available_models: Mutex<HashMap<String, ModelInfo>>,
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}
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impl ModelManager {
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pub fn new(app_handle: &AppHandle) -> Result<Self> {
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// Create models directory in app data
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let models_dir = app_handle
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.path()
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.app_data_dir()
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.map_err(|e| anyhow::anyhow!("Failed to get app data dir: {}", e))?
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.join("models");
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if !models_dir.exists() {
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fs::create_dir_all(&models_dir)?;
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}
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let mut available_models = HashMap::new();
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available_models.insert(
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"small".to_string(),
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ModelInfo {
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id: "small".to_string(),
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name: "Whisper Small".to_string(),
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description: "Fast and fairly accurate.".to_string(),
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filename: "ggml-small.bin".to_string(),
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url: Some("https://blob.handy.computer/ggml-small.bin".to_string()),
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size_mb: 487,
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is_downloaded: false,
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is_downloading: false,
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partial_size: 0,
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is_directory: false,
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engine_type: EngineType::Whisper,
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},
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);
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// Add downloadable models
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available_models.insert(
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"medium".to_string(),
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ModelInfo {
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id: "medium".to_string(),
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name: "Whisper Medium".to_string(),
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description: "Good accuracy, medium speed".to_string(),
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filename: "whisper-medium-q4_1.bin".to_string(),
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url: Some("https://blob.handy.computer/whisper-medium-q4_1.bin".to_string()),
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size_mb: 492, // Approximate size
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is_downloaded: false,
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is_downloading: false,
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partial_size: 0,
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is_directory: false,
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engine_type: EngineType::Whisper,
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},
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);
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available_models.insert(
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"turbo".to_string(),
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ModelInfo {
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id: "turbo".to_string(),
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name: "Whisper Turbo".to_string(),
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description: "Balanced accuracy and speed.".to_string(),
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filename: "ggml-large-v3-turbo.bin".to_string(),
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url: Some("https://blob.handy.computer/ggml-large-v3-turbo.bin".to_string()),
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size_mb: 1600, // Approximate size
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is_downloaded: false,
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is_downloading: false,
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partial_size: 0,
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is_directory: false,
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engine_type: EngineType::Whisper,
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},
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);
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available_models.insert(
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"large".to_string(),
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ModelInfo {
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id: "large".to_string(),
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name: "Whisper Large".to_string(),
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description: "Good accuracy, but slow.".to_string(),
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filename: "ggml-large-v3-q5_0.bin".to_string(),
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url: Some("https://blob.handy.computer/ggml-large-v3-q5_0.bin".to_string()),
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size_mb: 1100, // Approximate size
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is_downloaded: false,
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is_downloading: false,
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partial_size: 0,
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is_directory: false,
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engine_type: EngineType::Whisper,
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},
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);
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// Add NVIDIA Parakeet model (directory-based)
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available_models.insert(
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"parakeet-tdt-0.6b-v3".to_string(),
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ModelInfo {
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id: "parakeet-tdt-0.6b-v3".to_string(),
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name: "Parakeet V3".to_string(),
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description: "Fast and accurate".to_string(),
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filename: "parakeet-tdt-0.6b-v3-int8".to_string(), // Directory name
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url: Some("https://blob.handy.computer/parakeet-v3-int8.tar.gz".to_string()),
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size_mb: 850, // Approximate size for int8 quantized model
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is_downloaded: false,
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is_downloading: false,
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partial_size: 0,
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is_directory: true,
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engine_type: EngineType::Parakeet,
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},
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);
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let manager = Self {
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app_handle: app_handle.clone(),
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models_dir,
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available_models: Mutex::new(available_models),
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};
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// Migrate any bundled models to user directory
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manager.migrate_bundled_models()?;
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// Check which models are already downloaded
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manager.update_download_status()?;
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// Auto-select a model if none is currently selected
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manager.auto_select_model_if_needed()?;
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Ok(manager)
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}
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pub fn get_available_models(&self) -> Vec<ModelInfo> {
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let models = self.available_models.lock().unwrap();
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models.values().cloned().collect()
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}
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pub fn get_model_info(&self, model_id: &str) -> Option<ModelInfo> {
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let models = self.available_models.lock().unwrap();
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models.get(model_id).cloned()
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}
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fn migrate_bundled_models(&self) -> Result<()> {
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// Check for bundled models and copy them to user directory
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let bundled_models = ["ggml-small.bin"]; // Add other bundled models here if any
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for filename in &bundled_models {
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let bundled_path = self.app_handle.path().resolve(
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&format!("resources/models/{}", filename),
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tauri::path::BaseDirectory::Resource,
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);
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if let Ok(bundled_path) = bundled_path {
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if bundled_path.exists() {
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let user_path = self.models_dir.join(filename);
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// Only copy if user doesn't already have the model
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if !user_path.exists() {
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println!("Migrating bundled model {} to user directory", filename);
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fs::copy(&bundled_path, &user_path)?;
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println!("Successfully migrated {}", filename);
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}
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}
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}
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}
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Ok(())
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}
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fn update_download_status(&self) -> Result<()> {
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let mut models = self.available_models.lock().unwrap();
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for model in models.values_mut() {
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if model.is_directory {
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// For directory-based models, check if the directory exists
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let model_path = self.models_dir.join(&model.filename);
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let partial_path = self.models_dir.join(format!("{}.partial", &model.filename));
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let extracting_path = self
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.models_dir
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.join(format!("{}.extracting", &model.filename));
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// Clean up any leftover .extracting directories from interrupted extractions
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if extracting_path.exists() {
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println!("Cleaning up interrupted extraction for model: {}", model.id);
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let _ = fs::remove_dir_all(&extracting_path);
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}
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model.is_downloaded = model_path.exists() && model_path.is_dir();
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model.is_downloading = partial_path.exists();
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// Get partial file size if it exists (for the .tar.gz being downloaded)
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if partial_path.exists() {
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model.partial_size = partial_path.metadata().map(|m| m.len()).unwrap_or(0);
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} else {
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model.partial_size = 0;
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}
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} else {
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// For file-based models (existing logic)
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let model_path = self.models_dir.join(&model.filename);
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let partial_path = self.models_dir.join(format!("{}.partial", &model.filename));
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model.is_downloaded = model_path.exists();
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model.is_downloading = partial_path.exists();
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// Get partial file size if it exists
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if partial_path.exists() {
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model.partial_size = partial_path.metadata().map(|m| m.len()).unwrap_or(0);
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} else {
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model.partial_size = 0;
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}
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}
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}
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Ok(())
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}
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fn auto_select_model_if_needed(&self) -> Result<()> {
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// Check if we have a selected model in settings
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let settings = get_settings(&self.app_handle);
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// If no model is selected or selected model is empty
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if settings.selected_model.is_empty() {
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// Find the first available (downloaded) model
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let models = self.available_models.lock().unwrap();
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if let Some(available_model) = models.values().find(|model| model.is_downloaded) {
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println!(
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"Auto-selecting model: {} ({})",
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available_model.id, available_model.name
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);
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// Update settings with the selected model
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let mut updated_settings = settings;
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updated_settings.selected_model = available_model.id.clone();
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write_settings(&self.app_handle, updated_settings);
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println!("Successfully auto-selected model: {}", available_model.id);
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}
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}
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Ok(())
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}
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pub async fn download_model(&self, model_id: &str) -> Result<()> {
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let model_info = {
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let models = self.available_models.lock().unwrap();
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models.get(model_id).cloned()
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};
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let model_info =
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model_info.ok_or_else(|| anyhow::anyhow!("Model not found: {}", model_id))?;
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let url = model_info
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.url
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.ok_or_else(|| anyhow::anyhow!("No download URL for model"))?;
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let model_path = self.models_dir.join(&model_info.filename);
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let partial_path = self
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.models_dir
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.join(format!("{}.partial", &model_info.filename));
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// Don't download if complete version already exists
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if model_path.exists() {
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// Clean up any partial file that might exist
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if partial_path.exists() {
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let _ = fs::remove_file(&partial_path);
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}
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self.update_download_status()?;
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return Ok(());
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}
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// Check if we have a partial download to resume
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let resume_from = if partial_path.exists() {
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let size = partial_path.metadata()?.len();
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println!("Resuming download of model {} from byte {}", model_id, size);
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size
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} else {
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println!("Starting fresh download of model {} from {}", model_id, url);
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0
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};
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// Mark as downloading
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{
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let mut models = self.available_models.lock().unwrap();
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if let Some(model) = models.get_mut(model_id) {
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model.is_downloading = true;
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}
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}
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// Create HTTP client with range request for resuming
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let client = reqwest::Client::new();
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let mut request = client.get(&url);
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if resume_from > 0 {
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request = request.header("Range", format!("bytes={}-", resume_from));
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}
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let response = request.send().await?;
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// Check for success or partial content status
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if !response.status().is_success()
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&& response.status() != reqwest::StatusCode::PARTIAL_CONTENT
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{
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// Mark as not downloading on error
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{
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let mut models = self.available_models.lock().unwrap();
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if let Some(model) = models.get_mut(model_id) {
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model.is_downloading = false;
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}
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}
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return Err(anyhow::anyhow!(
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"Failed to download model: HTTP {}",
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response.status()
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));
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}
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let total_size = if resume_from > 0 {
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// For resumed downloads, add the resume point to content length
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resume_from + response.content_length().unwrap_or(0)
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} else {
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response.content_length().unwrap_or(0)
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};
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let mut downloaded = resume_from;
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let mut stream = response.bytes_stream();
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// Open file for appending if resuming, or create new if starting fresh
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let mut file = if resume_from > 0 {
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std::fs::OpenOptions::new()
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.create(true)
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.append(true)
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.open(&partial_path)?
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} else {
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std::fs::File::create(&partial_path)?
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};
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// Emit initial progress
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let initial_progress = DownloadProgress {
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model_id: model_id.to_string(),
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downloaded,
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total: total_size,
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percentage: if total_size > 0 {
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(downloaded as f64 / total_size as f64) * 100.0
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} else {
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0.0
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},
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};
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let _ = self
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.app_handle
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.emit("model-download-progress", &initial_progress);
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// Download with progress
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while let Some(chunk) = stream.next().await {
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let chunk = chunk.map_err(|e| {
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// Mark as not downloading on error
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{
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let mut models = self.available_models.lock().unwrap();
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if let Some(model) = models.get_mut(model_id) {
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model.is_downloading = false;
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}
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}
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e
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})?;
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file.write_all(&chunk)?;
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downloaded += chunk.len() as u64;
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let percentage = if total_size > 0 {
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(downloaded as f64 / total_size as f64) * 100.0
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} else {
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0.0
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};
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// Emit progress event
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let progress = DownloadProgress {
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model_id: model_id.to_string(),
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downloaded,
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total: total_size,
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percentage,
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};
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let _ = self.app_handle.emit("model-download-progress", &progress);
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}
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file.flush()?;
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drop(file); // Ensure file is closed before moving
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// Handle directory-based models (extract tar.gz) vs file-based models
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if model_info.is_directory {
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// Emit extraction started event
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let _ = self.app_handle.emit("model-extraction-started", model_id);
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println!("Extracting archive for directory-based model: {}", model_id);
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// Use a temporary extraction directory to ensure atomic operations
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let temp_extract_dir = self
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.models_dir
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.join(format!("{}.extracting", &model_info.filename));
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let final_model_dir = self.models_dir.join(&model_info.filename);
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// Clean up any previous incomplete extraction
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if temp_extract_dir.exists() {
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let _ = fs::remove_dir_all(&temp_extract_dir);
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}
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// Create temporary extraction directory
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fs::create_dir_all(&temp_extract_dir)?;
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// Open the downloaded tar.gz file
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let tar_gz = File::open(&partial_path)?;
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let tar = GzDecoder::new(tar_gz);
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let mut archive = Archive::new(tar);
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// Extract to the temporary directory first
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archive.unpack(&temp_extract_dir).map_err(|e| {
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let error_msg = format!("Failed to extract archive: {}", e);
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// Clean up failed extraction
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let _ = fs::remove_dir_all(&temp_extract_dir);
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let _ = self.app_handle.emit(
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"model-extraction-failed",
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&serde_json::json!({
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"model_id": model_id,
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"error": error_msg
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}),
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);
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anyhow::anyhow!(error_msg)
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})?;
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// Find the actual extracted directory (archive might have a nested structure)
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let extracted_dirs: Vec<_> = fs::read_dir(&temp_extract_dir)?
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.filter_map(|entry| entry.ok())
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.filter(|entry| entry.file_type().map(|ft| ft.is_dir()).unwrap_or(false))
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.collect();
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if extracted_dirs.len() == 1 {
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// Single directory extracted, move it to the final location
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let source_dir = extracted_dirs[0].path();
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if final_model_dir.exists() {
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fs::remove_dir_all(&final_model_dir)?;
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}
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fs::rename(&source_dir, &final_model_dir)?;
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// Clean up temp directory
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let _ = fs::remove_dir_all(&temp_extract_dir);
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} else {
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// Multiple items or no directories, rename the temp directory itself
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if final_model_dir.exists() {
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fs::remove_dir_all(&final_model_dir)?;
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}
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fs::rename(&temp_extract_dir, &final_model_dir)?;
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}
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println!("Successfully extracted archive for model: {}", model_id);
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// Emit extraction completed event
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let _ = self.app_handle.emit("model-extraction-completed", model_id);
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// Remove the downloaded tar.gz file
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let _ = fs::remove_file(&partial_path);
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} else {
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// Move partial file to final location for file-based models
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fs::rename(&partial_path, &model_path)?;
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}
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// Update download status
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{
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let mut models = self.available_models.lock().unwrap();
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if let Some(model) = models.get_mut(model_id) {
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model.is_downloading = false;
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model.is_downloaded = true;
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model.partial_size = 0;
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}
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}
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// Emit completion event
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let _ = self.app_handle.emit("model-download-complete", model_id);
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println!(
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"Successfully downloaded model {} to {:?}",
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model_id, model_path
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);
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Ok(())
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}
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pub fn delete_model(&self, model_id: &str) -> Result<()> {
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println!("ModelManager: delete_model called for: {}", model_id);
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let model_info = {
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let models = self.available_models.lock().unwrap();
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models.get(model_id).cloned()
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|
};
|
|
|
|
let model_info =
|
|
model_info.ok_or_else(|| anyhow::anyhow!("Model not found: {}", model_id))?;
|
|
|
|
println!("ModelManager: Found model info: {:?}", model_info);
|
|
|
|
let model_path = self.models_dir.join(&model_info.filename);
|
|
let partial_path = self
|
|
.models_dir
|
|
.join(format!("{}.partial", &model_info.filename));
|
|
println!("ModelManager: Model path: {:?}", model_path);
|
|
println!("ModelManager: Partial path: {:?}", partial_path);
|
|
|
|
let mut deleted_something = false;
|
|
|
|
if model_info.is_directory {
|
|
// Delete complete model directory if it exists
|
|
if model_path.exists() && model_path.is_dir() {
|
|
println!(
|
|
"ModelManager: Deleting model directory at: {:?}",
|
|
model_path
|
|
);
|
|
fs::remove_dir_all(&model_path)?;
|
|
println!("ModelManager: Model directory deleted successfully");
|
|
deleted_something = true;
|
|
}
|
|
} else {
|
|
// Delete complete model file if it exists
|
|
if model_path.exists() {
|
|
println!("ModelManager: Deleting model file at: {:?}", model_path);
|
|
fs::remove_file(&model_path)?;
|
|
println!("ModelManager: Model file deleted successfully");
|
|
deleted_something = true;
|
|
}
|
|
}
|
|
|
|
// Delete partial file if it exists (same for both types)
|
|
if partial_path.exists() {
|
|
println!("ModelManager: Deleting partial file at: {:?}", partial_path);
|
|
fs::remove_file(&partial_path)?;
|
|
println!("ModelManager: Partial file deleted successfully");
|
|
deleted_something = true;
|
|
}
|
|
|
|
if !deleted_something {
|
|
return Err(anyhow::anyhow!("No model files found to delete"));
|
|
}
|
|
|
|
// Update download status
|
|
self.update_download_status()?;
|
|
println!("ModelManager: Download status updated");
|
|
|
|
Ok(())
|
|
}
|
|
|
|
pub fn get_model_path(&self, model_id: &str) -> Result<PathBuf> {
|
|
let model_info = self
|
|
.get_model_info(model_id)
|
|
.ok_or_else(|| anyhow::anyhow!("Model not found: {}", model_id))?;
|
|
|
|
if !model_info.is_downloaded {
|
|
return Err(anyhow::anyhow!("Model not available: {}", model_id));
|
|
}
|
|
|
|
// Ensure we don't return partial files/directories
|
|
if model_info.is_downloading {
|
|
return Err(anyhow::anyhow!(
|
|
"Model is currently downloading: {}",
|
|
model_id
|
|
));
|
|
}
|
|
|
|
let model_path = self.models_dir.join(&model_info.filename);
|
|
let partial_path = self
|
|
.models_dir
|
|
.join(format!("{}.partial", &model_info.filename));
|
|
|
|
if model_info.is_directory {
|
|
// For directory-based models, ensure the directory exists and is complete
|
|
if model_path.exists() && model_path.is_dir() && !partial_path.exists() {
|
|
Ok(model_path)
|
|
} else {
|
|
Err(anyhow::anyhow!(
|
|
"Complete model directory not found: {}",
|
|
model_id
|
|
))
|
|
}
|
|
} else {
|
|
// For file-based models (existing logic)
|
|
if model_path.exists() && !partial_path.exists() {
|
|
Ok(model_path)
|
|
} else {
|
|
Err(anyhow::anyhow!(
|
|
"Complete model file not found: {}",
|
|
model_id
|
|
))
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn cancel_download(&self, model_id: &str) -> Result<()> {
|
|
println!("ModelManager: cancel_download called for: {}", model_id);
|
|
|
|
let _model_info = {
|
|
let models = self.available_models.lock().unwrap();
|
|
models.get(model_id).cloned()
|
|
};
|
|
|
|
let _model_info =
|
|
_model_info.ok_or_else(|| anyhow::anyhow!("Model not found: {}", model_id))?;
|
|
|
|
// Mark as not downloading
|
|
{
|
|
let mut models = self.available_models.lock().unwrap();
|
|
if let Some(model) = models.get_mut(model_id) {
|
|
model.is_downloading = false;
|
|
}
|
|
}
|
|
|
|
// Note: The actual download cancellation would need to be handled
|
|
// by the download task itself. This just updates the state.
|
|
// The partial file is kept so the download can be resumed later.
|
|
|
|
// Update download status to reflect current state
|
|
self.update_download_status()?;
|
|
|
|
println!("ModelManager: Download cancelled for: {}", model_id);
|
|
Ok(())
|
|
}
|
|
}
|