-
Notifications
You must be signed in to change notification settings - Fork 20
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Save queries to indexeddb instead of local storage
- Loading branch information
1 parent
febac14
commit d1f441e
Showing
3 changed files
with
165 additions
and
12 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| const indexedDBEnabled = typeof indexedDB !== 'undefined'; | ||
|
|
||
| const Database = (() => { | ||
| let dbInstance = null; | ||
|
|
||
| async function openDatabase() { | ||
| return new Promise((resolve, reject) => { | ||
| const request = indexedDB.open('BlobStorageDB', 1); | ||
|
|
||
| request.onupgradeneeded = (event) => { | ||
| const db = event.target.result; | ||
| if (!db.objectStoreNames.contains('blobs')) { | ||
| db.createObjectStore('blobs', { keyPath: 'key' }); | ||
| } | ||
| }; | ||
|
|
||
| request.onsuccess = (event) => { | ||
| resolve(event.target.result); | ||
| }; | ||
|
|
||
| request.onerror = (event) => { | ||
| reject('Error opening database: ' + event.target.errorCode); | ||
| }; | ||
| }); | ||
| } | ||
|
|
||
| return { | ||
| getInstance: async () => { | ||
| if (!dbInstance) { | ||
| dbInstance = await openDatabase(); | ||
| } | ||
| return dbInstance; | ||
| } | ||
| }; | ||
| })(); | ||
|
|
||
| const IndexedDBStorage = () => { | ||
| return { | ||
| async getItem(key) { | ||
| const db = await Database.getInstance(); | ||
| return new Promise((resolve, reject) => { | ||
| const transaction = db.transaction(['blobs'], 'readonly'); | ||
| const objectStore = transaction.objectStore('blobs'); | ||
| const request = objectStore.get(key); | ||
|
|
||
| request.onsuccess = (event) => { | ||
| const result = event.target.result; | ||
| if (result) { | ||
| resolve(result.blob); | ||
| } else { | ||
| resolve(null); | ||
| } | ||
| }; | ||
|
|
||
| request.onerror = (event) => { | ||
| reject('Error retrieving item: ' + event.target.errorCode); | ||
| }; | ||
| }); | ||
| }, | ||
| async setItem(key, value) { | ||
| const db = await Database.getInstance(); | ||
| return new Promise((resolve, reject) => { | ||
| const transaction = db.transaction(['blobs'], 'readwrite'); | ||
| const objectStore = transaction.objectStore('blobs'); | ||
| const request = objectStore.put({ key: key, blob: value }); | ||
|
|
||
| request.onsuccess = () => { | ||
| resolve(); | ||
| }; | ||
|
|
||
| request.onerror = (event) => { | ||
| reject('Error setting item: ' + event.target.errorCode); | ||
| }; | ||
| }); | ||
| }, | ||
| async removeItem(key) { | ||
| const db = await Database.getInstance(); | ||
| return new Promise((resolve, reject) => { | ||
| const transaction = db.transaction(['blobs'], 'readwrite'); | ||
| const objectStore = transaction.objectStore('blobs'); | ||
| const request = objectStore.delete(key); | ||
|
|
||
| request.onsuccess = () => { | ||
| resolve(); | ||
| }; | ||
|
|
||
| request.onerror = (event) => { | ||
| reject('Error removing item: ' + event.target.errorCode); | ||
| }; | ||
| }); | ||
| }, | ||
| async clear() { | ||
| const db = await Database.getInstance(); | ||
| return new Promise((resolve, reject) => { | ||
| const transaction = db.transaction(['blobs'], 'readwrite'); | ||
| const objectStore = transaction.objectStore('blobs'); | ||
| const request = objectStore.clear(); | ||
|
|
||
| request.onsuccess = () => { | ||
| resolve(); | ||
| }; | ||
|
|
||
| request.onerror = (event) => { | ||
| reject('Error clearing database: ' + event.target.errorCode); | ||
| }; | ||
| }); | ||
| } | ||
| }; | ||
| }; | ||
|
|
||
| const fakeAsyncStorage = (() => { | ||
| let store = {}; | ||
| return { | ||
| async getItem(key) { | ||
| return new Promise((resolve, _) => { | ||
| resolve(store[key] || null); | ||
| }); | ||
| }, | ||
| async setItem(key, value) { | ||
| return new Promise((resolve, _) => { | ||
| store[key] = value.toString(); | ||
| resolve(); | ||
| }); | ||
| }, | ||
| async removeItem(key) { | ||
| return new Promise((resolve, _) => { | ||
| delete store[key]; | ||
| resolve(); | ||
| }); | ||
| }, | ||
| async clear() { | ||
| return new Promise((resolve, _) => { | ||
| store = {}; | ||
| resolve(); | ||
| }); | ||
| } | ||
| }; | ||
| })(); | ||
|
|
||
| const BlobDatabase = indexedDBEnabled ? IndexedDBStorage : fakeAsyncStorage; | ||
| export { BlobDatabase }; |