96 lines
2.1 KiB
JavaScript
96 lines
2.1 KiB
JavaScript
export const sdcard = navigator.getDeviceStorage('sdcard')
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export function promisify(request) {
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return new Promise((resolve, reject) => {
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request.onsuccess = (event) => {
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resolve(request.result)
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}
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request.onerror = (event) => {
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reject(request.error)
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console.error(request.error)
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}
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})
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}
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export function joinPath(left, right) {
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return (left + right).replaceAll(/\/{2,}/g, '/')
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}
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function handle(sPath, sName) {
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return {
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name: sName,
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path: sPath,
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kind: 'directory'
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}
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}
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function resolveHandle(handle) {
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let cs = handle.path.split('/')
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let f = filesystemIndex
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for(let c of cs) {
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f = f.entries[c]
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if(f == undefined) {
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throw new Error('Invalid path:', handle.path)
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}
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}
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return f
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}
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export let filesystemIndex
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export function Start() {
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}
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export const createIndex = () => {
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return new Promise(filesystemIndexHandler)
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}
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const filesystemIndexHandler = (resolve, reject) => {
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let cursor = sdcard.enumerate();
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filesystemIndex = {}
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cursor.onerror = function() {
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reject(cursor.error)
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}
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cursor.onsuccess = function() {
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if(!this.result) {
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return resolve(filesystemIndex)
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}
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let cs = this.result.name.split('/').slice(1)
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let f = filesystemIndex
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let c
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for(let i = 0; i < cs.length; i++) {
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c = cs[i]
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if(!f.entries) {
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f.kind = 'directory'
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f.entries = {}
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}
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f = f.entries[c] ??= handle('/' + cs.slice(0, i + 1).join('/'), c)
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}
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f.kind = 'file'
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// f.file = this.result
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this.continue()
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}
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}
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export async function Entries(handle) {
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if(!filesystemIndex)
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await createIndex()
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let pool = new Map()
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let t = handle == null ? filesystemIndex : handle
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for(let n in t.entries ?? {}) {
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let h = t.entries[n]
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pool.set(h.name, h)
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}
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return pool
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}
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export function Open(hFile) {
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// return hFile.file
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return promisify(sdcard.get(hFile.path))
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} |