Function removeNonExistentFiles

main.js:2584–2742

(scanDirectoryPath, window = null)

    restartHttpServerNow().catch((error) => {
      console.error('Error during server restart:', error);
    });
  }, 100);
  return { success: true, message: 'Server restart initiated' };
}

let db;
let mainWindow;
let isGeneratingHashes = false; // Track hash generation state
let isHashGenerationScheduled = false;
let isCompressingThumbnailsBackground = false;
const THUMBNAIL_MIGRATION_DELAY_MS = Math.max(
  15000,
  Number.parseInt(process.env.PRINTVENTORY_THUMBNAIL_MIGRATION_DELAY_MS || '30000', 10) || 30000
);
const THUMBNAIL_MIGRATION_MAX_PER_SESSION = Math.max(
  25,
  Number.parseInt(process.env.PRINTVENTORY_THUMBNAIL_MIGRATION_MAX_PER_SESSION || '200', 10) || 200
);
const THUMBNAIL_MIGRATION_YIELD_MS = 25;

function scheduleBackgroundThumbnailCompression(reason) {
  setTimeout(() => {
    compressExistingThumbnailsInBackground(reason).catch((error) => {
      console.error('Background thumbnail compression failed:', error);
    });
  }, THUMBNAIL_MIGRATION_DELAY_MS);
}

function getThumbnailStoredLength(filePath) {
  if (!db || !filePath) return 0;
  const row = db.prepare('SELECT LENGTH(thumbnail) AS len FROM models WHERE filePath = ?').get(filePath);
  return row?.len ?? 0;
}

function clearThumbnailForPath(filePath, reason) {
  if (!db || !filePath) return false;
  try {
    const result = db.prepare('UPDATE models SET thumbnail = NULL WHERE filePath = ?').run(filePath);
    if (result.changes > 0) {
      console.warn(`Cleared thumbnail for ${filePath}${reason ? ` (${reason})` : ''}`);
    }
    return result.changes > 0;
  } catch (error) {
    console.error(`Failed to clear thumbnail for ${filePath}:`, error);
    return false;
  }
}

function purgeCorruptThumbnailsOnly(maxChars = THUMBNAIL_ABSOLUTE_MAX_LOAD_CHARS) {
  if (!db) return 0;
  try {
    const result = db.prepare(`
      UPDATE models
      SET thumbnail = NULL
      WHERE thumbnail IS NOT NULL
        AND LENGTH(thumbnail) > ?
    `).run(maxChars);
    if (result.changes > 0) {