mirror of
https://github.com/coderaiser/cloudcmd.git
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163 lines
7.1 KiB
JavaScript
163 lines
7.1 KiB
JavaScript
(function(global) {
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'use strict';
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if (typeof module === 'object' && module.exports)
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module.exports = new FormatProto();
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else
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global.Format = new FormatProto();
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function FormatProto() {
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this.addSlashToEnd = function(path) {
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var length, isSlash;
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if (path) {
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length = path.length - 1;
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isSlash = path[length] === '/';
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if (!isSlash)
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path += '/';
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}
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return path;
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};
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/** Функция получает короткие размеры
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* конвертируя байт в килобайты, мегабойты,
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* гигайбайты и терабайты
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* @pSize - размер в байтах
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*/
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this.size = function(size) {
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var isNumber = typeof size === 'number',
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l1KB = 1024,
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l1MB = l1KB * l1KB,
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l1GB = l1MB * l1KB,
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l1TB = l1GB * l1KB,
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l1PB = l1TB * l1KB;
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if (isNumber) {
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if (size < l1KB) size = size + 'b';
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else if (size < l1MB) size = (size / l1KB).toFixed(2) + 'kb';
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else if (size < l1GB) size = (size / l1MB).toFixed(2) + 'mb';
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else if (size < l1TB) size = (size / l1GB).toFixed(2) + 'gb';
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else if (size < l1PB) size = (size / l1TB).toFixed(2) + 'tb';
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else size = (size / l1PB).toFixed(2) + 'pb';
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}
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return size;
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};
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/**
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* Функция переводит права из цыфрового вида в символьный
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* @param perms - строка с правами доступа
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* к файлу в 8-миричной системе
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*/
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this.permissions = {
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symbolic: function(perms) {
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var type, owner, group, all,
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is = typeof perms !== undefined,
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permsStr = '',
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permissions = '';
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/*
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S_IRUSR 0000400 protection: readable by owner
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S_IWUSR 0000200 writable by owner
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S_IXUSR 0000100 executable by owner
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S_IRGRP 0000040 readable by group
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S_IWGRP 0000020 writable by group
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S_IXGRP 0000010 executable by group
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S_IROTH 0000004 readable by all
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S_IWOTH 0000002 writable by all
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S_IXOTH 0000001 executable by all
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*/
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if (is) {
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permsStr = perms.toString();
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/* тип файла */
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type = permsStr.charAt(0);
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switch (type - 0) {
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case 1: /* обычный файл */
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type = '-';
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break;
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case 2: /* байт-ориентированное (символьное) устройство*/
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type = 'c';
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break;
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case 4: /* каталог */
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type = 'd';
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break;
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default:
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type = '-';
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}
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/* оставляем последние 3 символа*/
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if (permsStr.length > 5)
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permsStr = permsStr.substr(3);
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else
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permsStr = permsStr.substr(2);
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/* Рекомендации гугла советуют вместо string[3]
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* использовать string.charAt(3)
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*/
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/*
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http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml?showone=Standards_features#Standards_features
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Always preferred over non-standards featuresFor
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maximum portability and compatibility, always
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prefer standards features over non-standards
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features (e.g., string.charAt(3) over string[3]
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and element access with DOM functions instead
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of using an application-specific shorthand).
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*/
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/* Переводим в двоичную систему */
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owner = (permsStr[0] - 0).toString(2),
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group = (permsStr[1] - 0).toString(2),
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all = (permsStr[2] - 0).toString(2),
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/* переводим в символьную систему*/
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permissions =
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(owner[0] - 0 > 0 ? 'r' : '-') +
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(owner[1] - 0 > 0 ? 'w' : '-') +
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(owner[2] - 0 > 0 ? 'x' : '-') +
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' ' +
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(group[0] - 0 > 0 ? 'r' : '-') +
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(group[1] - 0 > 0 ? 'w' : '-') +
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(group[2] - 0 > 0 ? 'x' : '-') +
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' ' +
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(all[0] - 0 > 0 ? 'r' : '-') +
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(all[1] - 0 > 0 ? 'w' : '-') +
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(all[2] - 0 > 0 ? 'x' : '-');
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}
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return permissions;
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},
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/**
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* Функция конвертирует права доступа к файлам из символьного вида
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* в цыфровой
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*/
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numeric: function(perms) {
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var owner, group, all,
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length = perms && perms.length === 11;
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if (length) {
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owner = (perms[0] === 'r' ? 4 : 0) +
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(perms[1] === 'w' ? 2 : 0) +
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(perms[2] === 'x' ? 1 : 0),
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group = (perms[4] === 'r' ? 4 : 0) +
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(perms[5] === 'w' ? 2 : 0) +
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(perms[6] === 'x' ? 1 : 0),
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all = (perms[8] === 'r' ? 4 : 0) +
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(perms[9] === 'w' ? 2 : 0) +
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(perms[10] === 'x' ? 1 : 0);
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/* добавляем 2 цифры до 5 */
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perms = '00' + owner + group + all;
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}
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return perms;
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}
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};
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}
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})(this);
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