91 lines
3.4 KiB
JavaScript
91 lines
3.4 KiB
JavaScript
const DB_NAME = 'SpreadsheetDB'
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const STORE_NAME = 'sheets'
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const LOG_STORE_NAME = 'op_logs' // Table for operation records
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const DB_VERSION = 2 // Increment version to trigger upgrade
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const openDB = () => {
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return new Promise((resolve, reject) => {
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const request = indexedDB.open(DB_NAME, DB_VERSION)
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request.onupgradeneeded = (event) => {
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const db = event.target.result
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// Main sheet store
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if (!db.objectStoreNames.contains(STORE_NAME)) {
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db.createObjectStore(STORE_NAME)
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}
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// Operation log store
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if (!db.objectStoreNames.contains(LOG_STORE_NAME)) {
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const store = db.createObjectStore(LOG_STORE_NAME, { keyPath: 'id', autoIncrement: true })
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store.createIndex('timestamp', 'timestamp')
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}
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}
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request.onsuccess = () => resolve(request.result)
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request.onerror = () => reject(request.error)
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})
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}
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export const db = {
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async get(key) {
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const db = await openDB()
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return new Promise((resolve, reject) => {
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const transaction = db.transaction(STORE_NAME, 'readonly')
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const store = transaction.objectStore(STORE_NAME)
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const request = store.get(key)
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request.onsuccess = () => resolve(request.result)
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request.onerror = () => reject(request.error)
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})
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},
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async set(key, value) {
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const db = await openDB()
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return new Promise((resolve, reject) => {
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const transaction = db.transaction(STORE_NAME, 'readwrite')
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const store = transaction.objectStore(STORE_NAME)
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const rawValue = JSON.parse(JSON.stringify(value))
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const request = store.put(rawValue, key)
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request.onsuccess = () => resolve()
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request.onerror = () => reject(request.error)
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})
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},
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// New: Add operation record
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async addLog(type, details) {
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const db = await openDB()
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return new Promise((resolve, reject) => {
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const transaction = db.transaction(LOG_STORE_NAME, 'readwrite')
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const store = transaction.objectStore(LOG_STORE_NAME)
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const record = {
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type,
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details: JSON.parse(JSON.stringify(details)), // Ensure plain object
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timestamp: Date.now()
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}
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const request = store.add(record)
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request.onsuccess = () => resolve(request.result)
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request.onerror = () => reject(request.error)
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})
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},
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// New: Get recent logs (for restoring history if needed)
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async getLogs(limit = 50) {
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const db = await openDB()
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return new Promise((resolve, reject) => {
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const transaction = db.transaction(LOG_STORE_NAME, 'readonly')
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const store = transaction.objectStore(LOG_STORE_NAME)
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const index = store.index('timestamp')
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const request = index.openCursor(null, 'prev') // Newest first
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const results = []
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request.onsuccess = (event) => {
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const cursor = event.target.result
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if (cursor && results.length < limit) {
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results.push(cursor.value)
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cursor.continue()
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} else {
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resolve(results.reverse())
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}
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}
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request.onerror = () => reject(request.error)
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})
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}
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} |