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getFileEntryBrowser.js
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getFileEntryBrowser.js
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const fsRoots = {
privateAppData: window.PERSISTENT,
publicAppData: window.TEMPORARY,
temp: window.TEMPORARY,
home: window.PERSISTENT,
}
const getDirectory = (rootDirEntry, dirName, opts) =>
new Promise((resolve, reject) => {
rootDirEntry.getDirectory(dirName, opts, resolve, reject)
})
function createDirHierarchy(rootDirEntry, directories) {
// Throw out './' or '/' and move on to prevent something like '/foo/.//bar'.
if (directories[0] == "." || directories[0] == "") {
directories = directories.slice(1)
}
if (directories.length === 0) {
return Promise.resolve()
}
return getDirectory(rootDirEntry, directories[0], {
create: true,
}).then(function(dirEntry) {
// Recursively add subdirectories
return createDirHierarchy(dirEntry, directories.slice(1))
})
}
module.exports = (fsRootName, path, opts = {}) => {
const { create = false, dir = false } = opts
return new Promise((resolve, reject) => {
;(window.requestFileSystem || window.webkitRequestFileSystem)(
fsRoots[fsRootName],
0,
function(fs) {
const getFileEntry = () => {
fs.root[dir ? "getDirectory" : "getFile"](
path,
opts,
fileEntry => {
console.debug("getFile: ok", path, fileEntry, fileEntry.toURL())
resolve(fileEntry)
},
err => {
if (err.name === "NotFoundError" || err.code === 1) {
console.debug("getFile: not found", path)
resolve(null)
} else {
console.error(err)
reject(err)
}
}
)
}
if (create) {
// create directory hierarchy then get file
return createDirHierarchy(fs.root, path.split("/").slice(0, -1)).then(
getFileEntry
)
} else {
getFileEntry()
}
},
reject
)
})
}