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'use strict';
var multipliers = {
'b': 1,
'k': 1024,
'm': 1024 * 1024,
'g': 1024 * 1024 * 1024
};
function parsePeriod(period) {
var result = {
periodNum: 1,
periodScope: 'd'
};
// Parse `period`.
if (period) {
// <number><scope> where scope is:
// h hours (at the start of the hour)
// d days (at the start of the day, i.e. just after midnight)
// w weeks (at the start of Sunday)
// m months (on the first of the month)
// y years (at the start of Jan 1st)
// with special values 'hourly' (1h), 'daily' (1d), "weekly" (1w),
// 'monthly' (1m) and 'yearly' (1y)
var crackedperiod = {
'hourly': '1h',
'daily': '1d',
'weekly': '1w',
'monthly': '1m',
'yearly': '1y'
}[period] || period;
var m = /^([1-9][0-9]*)([hdwmy]|ms)$/.exec(crackedperiod);
if (!m) {
throw new Error('invalid period: "' + period + '"');
}
result.periodNum = Number(m[1]);
result.periodScope = m[2];
}
return result;
}
function parseSize(size) {
// Parse `size`.
if (typeof (size) === 'string') {
// <number><scope> where scope is:
// b bytes
// k kilobytes
// m megabytes
// g gigabytes
var threshold = size;
var m = /^([1-9][0-9]*)([bkmg])$/.exec(threshold);
if (!m) {
throw new Error('invalid threshold: "' + size + '"');
}
return Number(m[1]) * multipliers[m[2]];
} else {
return size;
}
}
module.exports = { parseSize: parseSize, parsePeriod: parsePeriod };
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