161 строка
4.7 KiB
JavaScript
161 строка
4.7 KiB
JavaScript
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define('helpers',
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['l10n', 'nunjucks', 'underscore', 'utils', 'format', 'settings', 'urls', 'user'],
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function(l10n, nunjucks, _, utils) {
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var SafeString = nunjucks.require('runtime').SafeString;
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var filters = nunjucks.require('filters');
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function make_safe(func) {
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return function() {
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return new SafeString(func.apply(this, arguments));
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};
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}
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function safe_filter(name, func) {
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filters[name] = make_safe(func);
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}
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filters.extend = function(base, kwargs) {
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delete kwargs.__keywords;
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return _.extend(base, kwargs);
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};
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filters.bgurl = utils.bgurl;
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filters.urlparams = utils.urlparams;
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filters.urlunparam = utils.urlunparam;
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safe_filter('nl2br', function(obj) {
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if (typeof obj !== 'string') {
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return obj;
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}
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return obj.replace(/\n/g, '<br>');
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});
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safe_filter('make_data_attrs', function(obj) {
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return _.pairs(obj).map(function(pair) {
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return 'data-' + utils.escape_(pair[0]) + '="' + utils.escape_(pair[1]) + '"';
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}).join(' ');
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});
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safe_filter('external_href', function(obj) {
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return 'href="' + utils.escape_(obj) + '" target="_blank"';
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});
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filters.translate = utils.translate;
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filters.numberfmt = function(num) {
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if (typeof num === 'number' && num.toLocaleString) {
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return num.toLocaleString();
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}
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return num;
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};
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filters.datetime = function(date) {
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if (!date) {
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return '';
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}
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var orig_date = date;
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if (!(date instanceof Date)) {
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date = new Date(date);
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}
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var dateStr = date.toLocaleString();
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if (dateStr === 'Invalid Date') {
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console.warn('Invalid date: ', orig_date);
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return '';
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} else {
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return dateStr;
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}
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};
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filters.filter = function(list, kwargs) {
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var output = [];
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outer:
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for (var i = 0; i < list.length; i++) {
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var val = list[i];
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inner:
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for (var prop in kwargs) {
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if (!kwargs.hasOwnProperty(prop) || prop === '__keywords') continue inner;
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if (!(prop in val)) continue outer;
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if (Array.isArray(kwargs[prop]) ?
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kwargs[prop].indexOf(val[prop]) === -1 :
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val[prop] !== kwargs[prop]) continue outer;
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}
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output.push(val);
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}
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return output;
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};
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// Credit to ngoke and potch.
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filters.hex2rgba = function(hex, o) {
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hex = parseInt(hex.substring(hex[0] == '#' ? 1 : 0), 16);
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return 'rgba(' +
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(hex >> 16) + ',' +
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((hex & 0x00FF00) >> 8) + ',' +
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(hex & 0x0000FF) + ',' + o + ')';
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};
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safe_filter('stringify', JSON.stringify);
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filters.format = require('format').format;
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filters.sum = function(obj) {
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return obj.reduce(function(mem, num) {return mem + num;}, 0);
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};
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// The exposed user object should know nothing of tokens.
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var user = require('user');
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var userobj = {
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get_setting: user.get_setting,
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get_settings: function() {
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return _.clone(user.get_settings());
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},
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get_permission: user.get_permission,
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has_developed: user.has_developed,
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has_installed: user.has_installed,
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has_purchased: user.has_purchased,
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logged_in: user.logged_in
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};
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// Functions provided in the default context.
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var helpers = {
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api: require('urls').api.url,
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apiHost: require('urls').api.host,
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apiParams: require('urls').api.params,
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anonApi: require('urls').api.unsigned.url,
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anonApiParams: require('urls').api.unsigned.params,
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url: require('urls').reverse,
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media: require('urls').media,
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_: make_safe(l10n.gettext),
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_plural: make_safe(l10n.ngettext),
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format: require('format').format,
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settings: require('settings'),
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capabilities: require('capabilities'),
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user: userobj,
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escape: utils.escape_,
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len: function(x) {return x.length;},
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max: Math.max,
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min: Math.min,
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range: _.range,
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identity: function(obj) {
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if ('__keywords' in obj) delete obj.__keywords;
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return obj;
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},
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navigator: window.navigator,
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screen: window.screen,
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// TODO: Pull the default value from settings.
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language: window.navigator.l10n ? window.navigator.l10n.language : 'en-US'
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};
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// Put the helpers into the nunjucks global.
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var globals = nunjucks.require('globals');
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for (var i in helpers) {
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if (helpers.hasOwnProperty(i)) {
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globals[i] = helpers[i];
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}
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}
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return helpers;
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});
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