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joplin/ReactNativeClient/lib/fs-driver-rn.js

145 lines
3.7 KiB
JavaScript

const RNFS = require('react-native-fs');
class FsDriverRN {
appendFileSync(path, string) {
throw new Error('Not implemented');
}
appendFile(path, string, encoding = 'base64') {
return RNFS.appendFile(path, string, encoding);
}
writeFile(path, string, encoding = 'base64') {
return RNFS.writeFile(path, string, encoding);
}
// same as rm -rf
async remove(path) {
throw new Error('Not implemented');
}
writeBinaryFile(path, content) {
throw new Error('Not implemented');
}
// Returns a format compatible with Node.js format
rnfsStatToStd_(stat, path) {
return {
birthtime: stat.ctime ? stat.ctime : stat.mtime, // Confusingly, "ctime" normally means "change time" but here it's used as "creation time". Also sometimes it is null
mtime: stat.mtime,
isDirectory: () => stat.isDirectory(),
path: path,
size: stat.size,
};
}
async readDirStats(path) {
let items = await RNFS.readDir(path);
let output = [];
for (let i = 0; i < items.length; i++) {
const item = items[i];
const relativePath = item.path.substr(path.length + 1);
output.push(this.rnfsStatToStd_(item, relativePath));
}
return output;
}
async move(source, dest) {
return RNFS.moveFile(source, dest);
}
async exists(path) {
return RNFS.exists(path);
}
async mkdir(path) {
return RNFS.mkdir(path);
}
async stat(path) {
try {
const r = await RNFS.stat(path);
return this.rnfsStatToStd_(r, path);
} catch (error) {
if (error && error.message && error.message.indexOf('exist') >= 0) {
// Probably { [Error: File does not exist] framesToPop: 1, code: 'EUNSPECIFIED' }
// which unfortunately does not have a proper error code. Can be ignored.
return null;
} else {
throw error;
}
}
}
// NOTE: DOES NOT WORK - no error is thrown and the function is called with the right
// arguments but the function returns `false` and the timestamp is not set.
// Current setTimestamp is not really used so keep it that way, but careful if it
// becomes needed.
async setTimestamp(path, timestampDate) {
// return RNFS.touch(path, timestampDate, timestampDate);
}
async open(path, mode) {
// Note: RNFS.read() doesn't provide any way to know if the end of file has been reached.
// So instead we stat the file here and use stat.size to manually check for end of file.
// Bug: https://github.com/itinance/react-native-fs/issues/342
const stat = await this.stat(path);
return {
path: path,
offset: 0,
mode: mode,
stat: stat,
}
}
close(handle) {
return null;
}
readFile(path, encoding = 'utf8') {
if (encoding === 'Buffer') throw new Error('Raw buffer output not supported for FsDriverRN.readFile');
return RNFS.readFile(path, encoding);
}
// Always overwrite destination
async copy(source, dest) {
let retry = false;
try {
await RNFS.copyFile(source, dest);
} catch (error) {
// On iOS it will throw an error if the file already exist
retry = true;
await this.unlink(dest);
}
if (retry) await RNFS.copyFile(source, dest);
}
async unlink(path) {
try {
await RNFS.unlink(path);
} catch (error) {
if (error && error.message && error.message.indexOf('exist') >= 0) {
// Probably { [Error: File does not exist] framesToPop: 1, code: 'EUNSPECIFIED' }
// which unfortunately does not have a proper error code. Can be ignored.
} else {
throw error;
}
}
}
async readFileChunk(handle, length, encoding = 'base64') {
if (handle.offset + length > handle.stat.size) {
length = handle.stat.size - handle.offset;
}
if (!length) return null;
let output = await RNFS.read(handle.path, length, handle.offset, encoding);
handle.offset += length;
return output ? output : null;
}
}
module.exports.FsDriverRN = FsDriverRN;