claude-playwright/dist/core/cache-manager.cjs.map

Seamless integration between Claude Code and Playwright MCP for efficient browser automation and testing

{"version":3,"sources":["../../src/core/cache-manager.ts"],"sourcesContent":["import Database from 'better-sqlite3';\nimport * as path from 'path';\nimport * as os from 'os';\nimport * as fs from 'fs';\nimport crypto from 'crypto';\n\ninterface CacheEntry {\n  id?: number;\n  cache_key: string;\n  cache_type: 'selector' | 'state' | 'snapshot';\n  url: string;\n  data: string;\n  ttl: number;\n  created_at: number;\n  accessed_at: number;\n  hit_count: number;\n  profile?: string;\n}\n\ninterface CacheOptions {\n  maxSizeMB?: number;\n  selectorTTL?: number;\n  stateTTL?: number;\n  snapshotTTL?: number;\n  cleanupInterval?: number;\n}\n\nexport class CacheManager {\n  private db: Database.Database;\n  private cleanupTimer?: NodeJS.Timeout;\n  private options: Required<CacheOptions>;\n  private cacheDir: string;\n\n  constructor(options: CacheOptions = {}) {\n    this.options = {\n      maxSizeMB: options.maxSizeMB ?? 50,\n      selectorTTL: options.selectorTTL ?? 300000, // 5 minutes\n      stateTTL: options.stateTTL ?? 2000, // 2 seconds\n      snapshotTTL: options.snapshotTTL ?? 1800000, // 30 minutes\n      cleanupInterval: options.cleanupInterval ?? 60000 // 1 minute\n    };\n\n    // Create cache directory\n    this.cacheDir = path.join(os.homedir(), '.claude-playwright', 'cache');\n    if (!fs.existsSync(this.cacheDir)) {\n      fs.mkdirSync(this.cacheDir, { recursive: true });\n    }\n\n    // Initialize database\n    const dbPath = path.join(this.cacheDir, 'selector-cache.db');\n    this.db = new Database(dbPath);\n    this.db.pragma('journal_mode = WAL');\n    this.db.pragma('synchronous = NORMAL');\n    \n    this.initializeDatabase();\n    this.startCleanupTimer();\n  }\n\n  private initializeDatabase(): void {\n    // Create cache table\n    this.db.exec(`\n      CREATE TABLE IF NOT EXISTS cache (\n        id INTEGER PRIMARY KEY AUTOINCREMENT,\n        cache_key TEXT NOT NULL,\n        cache_type TEXT NOT NULL,\n        url TEXT NOT NULL,\n        data TEXT NOT NULL,\n        ttl INTEGER NOT NULL,\n        created_at INTEGER NOT NULL,\n        accessed_at INTEGER NOT NULL,\n        hit_count INTEGER DEFAULT 0,\n        profile TEXT,\n        UNIQUE(cache_key, cache_type, profile)\n      );\n\n      CREATE INDEX IF NOT EXISTS idx_cache_key ON cache(cache_key);\n      CREATE INDEX IF NOT EXISTS idx_cache_type ON cache(cache_type);\n      CREATE INDEX IF NOT EXISTS idx_url ON cache(url);\n      CREATE INDEX IF NOT EXISTS idx_ttl ON cache(created_at, ttl);\n      CREATE INDEX IF NOT EXISTS idx_profile ON cache(profile);\n\n      -- Metrics table for performance tracking\n      CREATE TABLE IF NOT EXISTS cache_metrics (\n        id INTEGER PRIMARY KEY AUTOINCREMENT,\n        cache_type TEXT NOT NULL,\n        hits INTEGER DEFAULT 0,\n        misses INTEGER DEFAULT 0,\n        evictions INTEGER DEFAULT 0,\n        timestamp INTEGER NOT NULL\n      );\n    `);\n  }\n\n  private generateCacheKey(input: string | object): string {\n    const data = typeof input === 'string' ? input : JSON.stringify(input);\n    return crypto.createHash('md5').update(data).digest('hex');\n  }\n\n  async get(\n    key: string | object,\n    type: 'selector' | 'state' | 'snapshot',\n    profile?: string\n  ): Promise<any | null> {\n    const cacheKey = this.generateCacheKey(key);\n    const now = Date.now();\n\n    try {\n      const stmt = this.db.prepare(`\n        SELECT * FROM cache \n        WHERE cache_key = ? \n        AND cache_type = ? \n        AND (profile = ? OR (profile IS NULL AND ? IS NULL))\n        AND (created_at + ttl) > ?\n      `);\n\n      const entry = stmt.get(cacheKey, type, profile, profile, now) as CacheEntry | undefined;\n\n      if (entry) {\n        // Update hit count and access time\n        const updateStmt = this.db.prepare(`\n          UPDATE cache \n          SET hit_count = hit_count + 1, accessed_at = ?\n          WHERE id = ?\n        `);\n        updateStmt.run(now, entry.id);\n\n        this.recordHit(type);\n        return JSON.parse(entry.data);\n      }\n\n      this.recordMiss(type);\n      return null;\n    } catch (error) {\n      console.error('Cache get error:', error);\n      return null;\n    }\n  }\n\n  async set(\n    key: string | object,\n    value: any,\n    type: 'selector' | 'state' | 'snapshot',\n    options: { url?: string; profile?: string; ttl?: number } = {}\n  ): Promise<void> {\n    const cacheKey = this.generateCacheKey(key);\n    const now = Date.now();\n    const ttl = options.ttl ?? this.getTTLForType(type);\n\n    try {\n      // Check cache size and evict if necessary\n      await this.evictIfNeeded();\n\n      const stmt = this.db.prepare(`\n        INSERT OR REPLACE INTO cache \n        (cache_key, cache_type, url, data, ttl, created_at, accessed_at, hit_count, profile)\n        VALUES (?, ?, ?, ?, ?, ?, ?, 0, ?)\n      `);\n\n      stmt.run(\n        cacheKey,\n        type,\n        options.url || '',\n        JSON.stringify(value),\n        ttl,\n        now,\n        now,\n        options.profile\n      );\n    } catch (error) {\n      console.error('Cache set error:', error);\n    }\n  }\n\n  async invalidate(options: { url?: string; type?: string; profile?: string } = {}): Promise<void> {\n    let query = 'DELETE FROM cache WHERE 1=1';\n    const params: any[] = [];\n\n    if (options.url) {\n      query += ' AND url = ?';\n      params.push(options.url);\n    }\n\n    if (options.type) {\n      query += ' AND cache_type = ?';\n      params.push(options.type);\n    }\n\n    if (options.profile !== undefined) {\n      query += ' AND (profile = ? OR (profile IS NULL AND ? IS NULL))';\n      params.push(options.profile, options.profile);\n    }\n\n    try {\n      const stmt = this.db.prepare(query);\n      const result = stmt.run(...params);\n      \n      if (result.changes > 0) {\n        this.recordEvictions(result.changes);\n      }\n    } catch (error) {\n      console.error('Cache invalidate error:', error);\n    }\n  }\n\n  async clear(): Promise<void> {\n    try {\n      this.db.exec('DELETE FROM cache');\n      this.db.exec('DELETE FROM cache_metrics');\n    } catch (error) {\n      console.error('Cache clear error:', error);\n    }\n  }\n\n  private getTTLForType(type: 'selector' | 'state' | 'snapshot'): number {\n    switch (type) {\n      case 'selector':\n        return this.options.selectorTTL;\n      case 'state':\n        return this.options.stateTTL;\n      case 'snapshot':\n        return this.options.snapshotTTL;\n      default:\n        return this.options.selectorTTL;\n    }\n  }\n\n  private async evictIfNeeded(): Promise<void> {\n    try {\n      // Get database size\n      const stats = fs.statSync(path.join(this.cacheDir, 'selector-cache.db'));\n      const sizeMB = stats.size / (1024 * 1024);\n\n      if (sizeMB > this.options.maxSizeMB) {\n        // Evict least recently used entries\n        const deleteCount = Math.floor(this.db.prepare('SELECT COUNT(*) as count FROM cache').get().count * 0.2);\n        \n        const stmt = this.db.prepare(`\n          DELETE FROM cache \n          WHERE id IN (\n            SELECT id FROM cache \n            ORDER BY accessed_at ASC \n            LIMIT ?\n          )\n        `);\n        \n        const result = stmt.run(deleteCount);\n        if (result.changes > 0) {\n          this.recordEvictions(result.changes);\n        }\n      }\n    } catch (error) {\n      console.error('Eviction error:', error);\n    }\n  }\n\n  private cleanup(): void {\n    try {\n      const now = Date.now();\n      const stmt = this.db.prepare('DELETE FROM cache WHERE (created_at + ttl) < ?');\n      const result = stmt.run(now);\n      \n      if (result.changes > 0) {\n        this.recordEvictions(result.changes);\n      }\n    } catch (error) {\n      console.error('Cleanup error:', error);\n    }\n  }\n\n  private startCleanupTimer(): void {\n    this.cleanupTimer = setInterval(() => {\n      this.cleanup();\n    }, this.options.cleanupInterval);\n  }\n\n  private recordHit(type: string): void {\n    this.updateMetrics(type, 'hits');\n  }\n\n  private recordMiss(type: string): void {\n    this.updateMetrics(type, 'misses');\n  }\n\n  private recordEvictions(count: number): void {\n    try {\n      const stmt = this.db.prepare(`\n        INSERT INTO cache_metrics (cache_type, evictions, timestamp)\n        VALUES ('all', ?, ?)\n      `);\n      stmt.run(count, Date.now());\n    } catch (error) {\n      console.error('Metrics error:', error);\n    }\n  }\n\n  private updateMetrics(type: string, metric: 'hits' | 'misses'): void {\n    try {\n      const stmt = this.db.prepare(`\n        INSERT INTO cache_metrics (cache_type, ${metric}, timestamp)\n        VALUES (?, 1, ?)\n      `);\n      stmt.run(type, Date.now());\n    } catch (error) {\n      console.error('Metrics error:', error);\n    }\n  }\n\n  async getMetrics(): Promise<any> {\n    try {\n      const stmt = this.db.prepare(`\n        SELECT \n          cache_type,\n          SUM(hits) as total_hits,\n          SUM(misses) as total_misses,\n          SUM(evictions) as total_evictions\n        FROM cache_metrics\n        GROUP BY cache_type\n      `);\n      \n      return stmt.all();\n    } catch (error) {\n      console.error('Get metrics error:', error);\n      return [];\n    }\n  }\n\n  close(): void {\n    if (this.cleanupTimer) {\n      clearInterval(this.cleanupTimer);\n    }\n    this.db.close();\n  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