First working POC

src/lib/services/preload.ts

@@ -0,0 +1,90 @@
+/**
+ * Smart preloading service for upcoming tracks
+ * Automatically queues downloads for the next few tracks in the queue
+ */
+
+import { invoke } from '@tauri-apps/api/core';
+import { auth } from '$lib/stores/auth';
+
+interface PreloadResult {
+	queuedCount: number;
+	alreadyDownloaded: number;
+	skipped: number;
+}
+
+interface PreloadOptions {
+	/** Enable debug logging */
+	debug?: boolean;
+	/** Override user ID (defaults to current session user) */
+	userId?: string;
+}
+
+/**
+ * Trigger preloading for upcoming tracks in the queue
+ * This should be called after playback starts or advances to the next track
+ */
+export async function preloadUpcomingTracks(options: PreloadOptions = {}): Promise<void> {
+	const { debug = false, userId: overrideUserId } = options;
+
+	try {
+		// Get current user ID
+		const userId = overrideUserId || auth.getUserId();
+
+		if (!userId) {
+			if (debug) console.log('[Preload] No active user session, skipping preload');
+			return;
+		}
+
+		if (debug) console.log('[Preload] Triggering preload for user:', userId);
+
+		const result = await invoke<PreloadResult>('player_preload_upcoming', {
+			userId,
+			downloadBasePath: '/downloads' // This parameter is currently unused in the backend
+		});
+
+		if (debug) {
+			console.log('[Preload] Result:', {
+				queued: result.queuedCount,
+				alreadyDownloaded: result.alreadyDownloaded,
+				skipped: result.skipped
+			});
+		}
+
+		// Log meaningful results
+		if (result.queuedCount > 0) {
+			console.log(`[Preload] Queued ${result.queuedCount} track(s) for background download`);
+		}
+	} catch (error) {
+		// Fail silently - preloading is a background optimization
+		// Don't interrupt the user's playback experience
+		console.warn('[Preload] Failed to preload upcoming tracks:', error);
+	}
+}
+
+/**
+ * Update smart cache configuration
+ */
+export async function updateCacheConfig(config: {
+	queuePrecacheEnabled?: boolean;
+	queuePrecacheCount?: number;
+	albumAffinityEnabled?: boolean;
+	albumAffinityThreshold?: number;
+	storageLimit?: number;
+	wifiOnly?: boolean;
+}): Promise<void> {
+	await invoke('player_set_cache_config', { config });
+}
+
+/**
+ * Get current cache configuration
+ */
+export async function getCacheConfig(): Promise<{
+	queuePrecacheEnabled: boolean;
+	queuePrecacheCount: number;
+	albumAffinityEnabled: boolean;
+	albumAffinityThreshold: number;
+	storageLimit: number;
+	wifiOnly: boolean;
+}> {
+	return await invoke('player_get_cache_config');
+}