147 lines
2.9 KiB
JavaScript
147 lines
2.9 KiB
JavaScript
/**
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* File: app/helper.js
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* Author: Gerrit Linnemann
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*
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* Swiss-knife.
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*/
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// load the things we need
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var os = require('os')
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, dns = require('dns')
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, Log = require('./logging')
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, Crypto = require('crypto')
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, interfaceAddresses = require('interface-addresses')
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, spawn = require('child_process').spawn;
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var app = null;
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exports.init = function(express) {
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app = express;
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return this;
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}
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exports.shspawn = function(command) {
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spawn('sh', ['-c', command], { stdio: 'inherit' });
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}
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exports.timeSince = function(date) {
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var seconds = Math.floor((new Date() - date) / 1000);
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var interval = Math.floor(seconds / 31536000);
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if (interval > 1) {
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return interval + " years";
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}
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interval = Math.floor(seconds / 2592000);
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if (interval > 1) {
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return interval + " months";
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}
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interval = Math.floor(seconds / 86400);
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if (interval > 1) {
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return interval + " days";
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}
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interval = Math.floor(seconds / 3600);
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if (interval > 1) {
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return interval + " hours";
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}
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interval = Math.floor(seconds / 60);
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if (interval > 1) {
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return interval + " minutes";
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}
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return Math.floor(seconds) + " seconds";
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}
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exports.isJSON = function(toCheck) {
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try {
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JSON.parse(str);
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} catch (e) {
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return false;
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}
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return true;
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}
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exports.isDefinedAndNotNull = function(toCheck) {
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return (
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typeof toCheck !== 'undefined' &&
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toCheck != null
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);
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}
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exports.cnt = function(db) {
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var cnt = 0;
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if(db.constructor === Array) { // do it the array-way
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cnt = db.length;
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} else { // oh boy, no array ...
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var cnt_ = 0;
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for (var key_ in db) { cnt_++; }
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cnt = cnt_;
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}
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return cnt;
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}
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exports.each = function(db, callback) {
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if(db.constructor === Array) { // do it the array-way
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for(i=0; i < db.length; i++) {
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var entry = db[i];
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var isLast = ((i+1) == db.length);
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callback(entry, isLast);
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}
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} else { // oh boy, no array ...
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var cnt_ = 0;
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for (var key_ in db) { cnt_++; }
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var cnt = 0;
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for (var key in db) {
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cnt++;
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var entry = db[key];
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callback(entry, (cnt_==cnt));
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}
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}
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}
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exports.checkValueEquality = function(foo, bar) {
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return doValueEqualityCheck(foo, bar);
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}
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exports.simpleHash = function(foo) {
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var hash = Crypto.createHash('md5').update(foo).digest('hex');
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return hash;
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}
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exports.translatePercentVolumeValueToMacScala = function(volumeInPercent) {
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return parseInt((volumeInPercent / 10));
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}
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/* private */
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function doValueEqualityCheck(foo, bar) {
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var key;
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for(key in foo) {
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Log.debug( "Helper: Compare \"" + foo[key] + "\" with \"" + bar[key] + "\" for key \"" + key + "\"" );
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if(typeof foo[key] === 'object' && typeof bar[key] === 'object') {
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var isEquals = doValueEqualityCheck(foo, bar);
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if(!isEquals) {
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return false;
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}
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} else {
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if(foo[key].localeCompare(bar[key]) != 0) {
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return false;
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}
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}
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}
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return true;
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} |