88 lines
2.1 KiB
JavaScript
88 lines
2.1 KiB
JavaScript
|
export class NodeStore {
|
||
|
|
constructor() {
|
||
|
|
if (!('indexedDB' in window)) {
|
||
|
|
throw 'Missing IndexedDB'
|
||
|
|
}
|
||
|
|
|
||
|
|
this.db = null
|
||
|
|
}
|
||
|
|
|
||
|
|
async initializeDB() {
|
||
|
|
return new Promise((resolve, reject) => {
|
||
|
|
let req = indexedDB.open('notes', 2)
|
||
|
|
|
||
|
|
|
||
|
|
// Schema upgrades for IndexedDB.
|
||
|
|
// These can start from different points depending on updates to Notes2 since a device was online.
|
||
|
|
req.onupgradeneeded = (event) => {
|
||
|
|
var store
|
||
|
|
let db = event.target.result
|
||
|
|
let trx = event.target.transaction
|
||
|
|
|
||
|
|
for (let i = event.oldVersion + 1; i <= event.newVersion; i++) {
|
||
|
|
console.log(`Upgrade to schema ${i}`)
|
||
|
|
|
||
|
|
// The schema transformations.
|
||
|
|
switch (i) {
|
||
|
|
case 1:
|
||
|
|
store = db.createObjectStore('nodes', { keyPath: 'ID' })
|
||
|
|
store.createIndex('nameIndex', 'Name', { unique: false })
|
||
|
|
break
|
||
|
|
case 2:
|
||
|
|
trx.objectStore('nodes').createIndex('parentIndex', 'ParentID', { unique: false })
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
req.onsuccess = (event) => {
|
||
|
|
this.db = event.target.result
|
||
|
|
resolve()
|
||
|
|
}
|
||
|
|
|
||
|
|
req.onerror = (event) => {
|
||
|
|
reject(event.target.error)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
async add(records) {
|
||
|
|
return new Promise((resolve, reject) => {
|
||
|
|
try {
|
||
|
|
let t = this.db.transaction('nodes', 'readwrite')
|
||
|
|
let nodeStore = t.objectStore('nodes')
|
||
|
|
t.onerror = (event) => {
|
||
|
|
console.log('transaction error', event.target.error)
|
||
|
|
reject(event.target.error)
|
||
|
|
}
|
||
|
|
t.oncomplete = () => {
|
||
|
|
resolve()
|
||
|
|
}
|
||
|
|
|
||
|
|
records.forEach(record => {
|
||
|
|
let addReq = nodeStore.add(record)
|
||
|
|
addReq.onsuccess = (event) => {
|
||
|
|
console.log('OK!', record.ID, record.Name)
|
||
|
|
}
|
||
|
|
addReq.onerror = (event) => {
|
||
|
|
console.log('Error!', event.target.error, record.ID)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
|
||
|
|
} catch (e) {
|
||
|
|
console.log(e)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
async getTreeNodes() {
|
||
|
|
return new Promise((resolve, reject)=>{
|
||
|
|
let trx = this.db.transaction('nodes', 'readonly')
|
||
|
|
let nodeStore = trx.objectStore('nodes')
|
||
|
|
let req = nodeStore.getAll()
|
||
|
|
req.onsuccess = (event)=>resolve(event.target.result)
|
||
|
|
req.onerror = (event)=>reject(event.target.error)
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|