149 lines
3.7 KiB
JavaScript
Executable File
149 lines
3.7 KiB
JavaScript
Executable File
#!/usr/bin/env node
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/**
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* Copyright (c) 2015 Joyent Inc. All rights reserved.
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*/
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var assert = require('assert-plus');
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var sprintf = require('extsprintf').sprintf;
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var util = require('util'),
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format = util.format;
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var errors = require('./errors'),
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InternalError = errors.InternalError;
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// ---- globals
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var p = console.log;
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// ---- support stuff
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function objCopy(obj, target) {
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if (target === undefined) {
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target = {};
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}
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Object.keys(obj).forEach(function (k) {
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target[k] = obj[k];
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});
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return target;
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}
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function deepObjCopy(obj) {
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return JSON.parse(JSON.stringify(obj));
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}
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function zeroPad(n, width) {
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var s = String(n);
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while (s.length < width) {
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s = '0' + s;
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}
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return s;
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}
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/**
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* Convert a boolean or string representation into a boolean, or
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* raise TypeError trying.
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*
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* @param value {Boolean|String} The input value to convert.
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* @param default_ {Boolean} The default value is `value` is undefined.
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* @param errName {String} The variable name to quote in the possibly
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* raised TypeError.
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*/
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function boolFromString(value, default_, errName) {
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if (value === undefined) {
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return default_;
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} else if (value === 'false' || value === '0') {
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return false;
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} else if (value === 'true' || value === '1') {
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return true;
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} else if (typeof (value) === 'boolean') {
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return value;
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} else {
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throw new TypeError(
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format('invalid value for "%s": %j', errName, value));
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}
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}
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/**
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* given an array return a string with each element
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* JSON-stringifed separated by newlines
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*/
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function jsonStream(arr) {
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return arr.map(function (elem) {
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return JSON.stringify(elem);
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}).join('\n');
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}
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/**
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* given an array of key=value pairs, break them into an object
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*
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* @param {Array} kvs - an array of key=value pairs
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* @param {Array} valid (optional) - an array to validate pairs
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*/
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function kvToObj(kvs, valid) {
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var o = {};
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for (var i = 0; i < kvs.length; i++) {
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var kv = kvs[i];
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var idx = kv.indexOf('=');
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if (idx === -1)
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throw new errors.UsageError(format(
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'invalid filter: "%s" (must be of the form "field=value")',
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kv));
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var k = kv.slice(0, idx);
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var v = kv.slice(idx + 1);
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if (valid.indexOf(k) === -1)
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throw new errors.UsageError(format(
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'invalid filter name: "%s" (must be one of "%s")',
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k, valid.join('", "')));
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o[k] = v;
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}
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return o;
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}
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/**
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* return how long ago something happened
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*
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* @param {Date} when - a date object in the past
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* @param {Date} now (optional) - a date object to compare to
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* @return {String} - printable string
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*/
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function longAgo(when, now) {
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now = now || new Date();
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var seconds = Math.round((now - when) / 1000);
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var times = [
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seconds / 60 / 60 / 24 / 365, // years
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seconds / 60 / 60 / 24 / 30, // months
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seconds / 60 / 60 / 24, // days
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seconds / 60 / 60, // hours
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seconds / 60, // minutes
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seconds // seconds
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];
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var names = ['y', 'mon', 'd', 'h', 'min', 's'];
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for (var i = 0; i < names.length; i++) {
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var time = Math.floor(times[i]);
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if (time > 0)
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return util.format('%d%s', time, names[i]);
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}
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return '0s';
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}
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//---- exports
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module.exports = {
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objCopy: objCopy,
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deepObjCopy: deepObjCopy,
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zeroPad: zeroPad,
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boolFromString: boolFromString,
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jsonStream: jsonStream,
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kvToObj: kvToObj,
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longAgo: longAgo
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};
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// vim: set softtabstop=4 shiftwidth=4:
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