forked from Fediversity/Fediversity
79 lines
1.6 KiB
JavaScript
79 lines
1.6 KiB
JavaScript
var fs = require('fs');
|
|
var path = require('path');
|
|
var pify = require('pify');
|
|
|
|
var stat = pify(fs.stat);
|
|
var readFile = pify(fs.readFile);
|
|
var resolve = path.resolve;
|
|
|
|
var cache = Object.create(null);
|
|
|
|
function convert(content, encoding) {
|
|
if (Buffer.isEncoding(encoding)) {
|
|
return content.toString(encoding);
|
|
}
|
|
return content;
|
|
}
|
|
|
|
module.exports = function (path, encoding) {
|
|
path = resolve(path);
|
|
|
|
return stat(path).then(function (stats) {
|
|
var item = cache[path];
|
|
|
|
if (item && item.mtime.getTime() === stats.mtime.getTime()) {
|
|
return convert(item.content, encoding);
|
|
}
|
|
|
|
return readFile(path).then(function (data) {
|
|
cache[path] = {
|
|
mtime: stats.mtime,
|
|
content: data
|
|
};
|
|
|
|
return convert(data, encoding);
|
|
});
|
|
}).catch(function (err) {
|
|
cache[path] = null;
|
|
return Promise.reject(err);
|
|
});
|
|
};
|
|
|
|
module.exports.sync = function (path, encoding) {
|
|
path = resolve(path);
|
|
|
|
try {
|
|
var stats = fs.statSync(path);
|
|
var item = cache[path];
|
|
|
|
if (item && item.mtime.getTime() === stats.mtime.getTime()) {
|
|
return convert(item.content, encoding);
|
|
}
|
|
|
|
var data = fs.readFileSync(path);
|
|
|
|
cache[path] = {
|
|
mtime: stats.mtime,
|
|
content: data
|
|
};
|
|
|
|
return convert(data, encoding);
|
|
} catch (err) {
|
|
cache[path] = null;
|
|
throw err;
|
|
}
|
|
|
|
};
|
|
|
|
module.exports.get = function (path, encoding) {
|
|
path = resolve(path);
|
|
if (cache[path]) {
|
|
return convert(cache[path].content, encoding);
|
|
}
|
|
return null;
|
|
};
|
|
|
|
module.exports.clear = function () {
|
|
cache = Object.create(null);
|
|
};
|