admin/src/lib/searchSessionStorage.js - main - som_cooper/book-lib

admin/src/lib/searchSessionStorage.js
113 строк3 KB
imdbcooper
Fix Anna search results and Flibusta descriptions
25 май 2026, 12:15
25 май 2026, 12:1507880dc
const STORAGE_KEY_PREFIX = 'book-library:admin:search-session:'
const LAST_SESSION_KEY = 'book-library:admin:search-session:last'
const SESSION_VERSION = 1
const SESSION_MAX_AGE_MS = 12 * 60 * 60 * 1000

function getStorage() {
  if (typeof window === 'undefined') return null

  try {
    return window.sessionStorage
  } catch {
    return null
  }
}

function buildSessionStorageKey(sessionId) {
  return `${STORAGE_KEY_PREFIX}${sessionId}`
}

function isValidSessionId(sessionId) {
  return typeof sessionId === 'string' && sessionId.trim().length > 0
}

function isExpiredSnapshot(snapshot) {
  if (!snapshot?.updatedAt) return false

  const updatedAt = Date.parse(snapshot.updatedAt)
  if (!Number.isFinite(updatedAt)) return false

  return (Date.now() - updatedAt) > SESSION_MAX_AGE_MS
}

function readSnapshotRecord(storage, sessionId) {
  if (!storage || !isValidSessionId(sessionId)) return null

  try {
    const raw = storage.getItem(buildSessionStorageKey(sessionId))
    if (!raw) return null

    const snapshot = JSON.parse(raw)
    if (!snapshot || snapshot.version !== SESSION_VERSION || snapshot.sessionId !== sessionId) {
      storage.removeItem(buildSessionStorageKey(sessionId))
      return null
    }

    if (isExpiredSnapshot(snapshot)) {
      storage.removeItem(buildSessionStorageKey(sessionId))
      if (storage.getItem(LAST_SESSION_KEY) === sessionId) {
        storage.removeItem(LAST_SESSION_KEY)
      }
      return null
    }

    return snapshot
  } catch {
    storage.removeItem(buildSessionStorageKey(sessionId))
    return null
  }
}

export function createSearchSessionId() {
  return `search-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 10)}`
}

export function readSearchSession(sessionId) {
  const storage = getStorage()
  return readSnapshotRecord(storage, sessionId)
}

export function readLatestSearchSession(query = '') {
  const storage = getStorage()
  if (!storage) return null

  const latestSessionId = storage.getItem(LAST_SESSION_KEY)
  const latestSnapshot = readSnapshotRecord(storage, latestSessionId)
  if (!latestSnapshot) return null

  const normalizedQuery = String(query || '').trim()
  if (normalizedQuery && latestSnapshot.query !== normalizedQuery) {
    return null
  }

  return latestSnapshot
}

export function writeSearchSession(snapshot) {
  if (!snapshot || !isValidSessionId(snapshot.sessionId)) return null

  const storage = getStorage()
  if (!storage) return null

  const timestamp = new Date().toISOString()
  const record = {
    version: SESSION_VERSION,
    createdAt: snapshot.createdAt || timestamp,
    updatedAt: timestamp,
    ...snapshot,
  }

  storage.setItem(buildSessionStorageKey(record.sessionId), JSON.stringify(record))
  storage.setItem(LAST_SESSION_KEY, record.sessionId)
  return record
}

export function clearSearchSession(sessionId) {
  const storage = getStorage()
  if (!storage || !isValidSessionId(sessionId)) return

  storage.removeItem(buildSessionStorageKey(sessionId))
  if (storage.getItem(LAST_SESSION_KEY) === sessionId) {
    storage.removeItem(LAST_SESSION_KEY)
  }
}