type PackageManifest,

} from "./manifest.js";

const INSTALLED_MANIFEST_REGISTRY_CACHE_MAX_ENTRIES = 64;

const INSTALLED_MANIFEST_REGISTRY_FALLBACK_CACHE_MAX_ENTRIES = 64;

type InstalledManifestRegistryCacheEntry = {

registry: PluginManifestRegistry;

lastUsed: number;

};

const installedManifestRegistryCache = new Map<string, InstalledManifestRegistryCacheEntry>();

let installedManifestRegistryCacheTick = 0;

const installedManifestRegistryFallbackCache = new Map<

string,

InstalledManifestRegistryCacheEntry

>();

let installedManifestRegistryFallbackCacheTick = 0;

function normalizePluginIdFilter(pluginIds: readonly string[] | undefined): string[] | undefined {

if (!pluginIds?.length) {

}

function getCachedInstalledManifestRegistry(cacheKey: string): PluginManifestRegistry | undefined {

const cached = installedManifestRegistryCache.get(cacheKey);

const cached = installedManifestRegistryFallbackCache.get(cacheKey);

if (!cached) {

return undefined;

}

cached.lastUsed = ++installedManifestRegistryCacheTick;

cached.lastUsed = ++installedManifestRegistryFallbackCacheTick;

return cached.registry;

}

registry: PluginManifestRegistry,

): void {

if (

!installedManifestRegistryCache.has(cacheKey) &&

installedManifestRegistryCache.size >= INSTALLED_MANIFEST_REGISTRY_CACHE_MAX_ENTRIES

!installedManifestRegistryFallbackCache.has(cacheKey) &&

installedManifestRegistryFallbackCache.size >=

INSTALLED_MANIFEST_REGISTRY_FALLBACK_CACHE_MAX_ENTRIES

) {

let oldestKey: string | undefined;

let oldestTick = Number.POSITIVE_INFINITY;

for (const [key, entry] of installedManifestRegistryCache) {

for (const [key, entry] of installedManifestRegistryFallbackCache) {

if (entry.lastUsed < oldestTick) {

oldestKey = key;

oldestTick = entry.lastUsed;

}

}

if (oldestKey) {

installedManifestRegistryCache.delete(oldestKey);

installedManifestRegistryFallbackCache.delete(oldestKey);

}

}

installedManifestRegistryCache.set(cacheKey, {

installedManifestRegistryFallbackCache.set(cacheKey, {

registry,

lastUsed: ++installedManifestRegistryCacheTick,

lastUsed: ++installedManifestRegistryFallbackCacheTick,

});

}

export function clearInstalledManifestRegistryCache(): void {

installedManifestRegistryCache.clear();

installedManifestRegistryFallbackCache.clear();

installedManifestRegistryFallbackCacheTick = 0;

}

function resolveInstalledPluginRootDir(record: InstalledPluginIndexRecord): string {