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index.js
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index.js
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/**
* Module dependencies
*/
var angular = window.angular;
var compileTranslation = require('lang-js-translate');
var compileRelative = require('lang-js-relative');
/**
* Allow users to opt into displaying missing translation warnings
*/
if (typeof BROWSER_ENV === 'undefined') BROWSER_ENV = 'production';
/**
* Initialize the ng-hyper-translate module
*/
var pkg = module.exports = angular.module('ng-hyper-translate', ['ng-hyper']);
pkg.value('hyperTranslateFallback', '');
pkg.value('hyperTranslateOpen', '%{');
pkg.value('hyperTranslateClose', '}');
pkg.value('hyperTranslateLocale', 'en');
pkg.factory('hyperTranslate', [
'hyper',
'hyperTranslateFallback',
'hyperTranslateOpen',
'hyperTranslateClose',
'hyperTranslateLocale',
function(hyper, fallback, open, close, locale) {
var opts = {
fallback: fallback,
open: open,
close: close,
validatePluralKey: false
};
var cache = {};
return function(path, $scope, fn) {
return hyper.get(path, $scope, function(value, req) {
if (!value) return fn();
if (cache[value]) return fn(cache[value]);
var conf = value;
if (typeof value === 'string') conf = value.split(/ *\|\|\|\| */);
if (Array.isArray(conf) && conf.length === 1) conf = conf[0];
var format = conf._format;
var t;
try {
t = cache[JSON.stringify(conf)] = format === 'relative' ?
compileRelative(conf, locale, opts) :
compileTranslation(conf, locale, opts);
} catch (err) {
console.error(err);
return fn();
};
fn(t, format);
});
};
}
]);
/**
* Initialize the hyperTranslate directive
*/
pkg.directive('hyperTranslate', [
'hyperTranslate',
'$compile',
'hyper',
function(lookup, $compile, hyper) {
function watchParams(params, $scope, opts) {
opts = opts || {};
angular.forEach(params, function(path, target) {
hyper.get(path, $scope, function update(value, req) {
if (opts.format === 'relative', target === (opts.key || 'time') && value) {
$scope[target] = Math.floor((new Date(value) - new Date()) / 1000);
if (isNaN($scope[target])) $scope[target] = 0;
} else {
$scope[target] = value;
}
});
});
}
// set the innerHTML on the element while compiling it with angular
function setHtml(elem, $scope, str) {
var child = $compile('<span class="ng-hyper-translate-binding">' + str + '</span>')($scope);
elem.empty();
elem.append(child);
}
function setHtmlText(elem, $scope, str) {
elem.html(str);
}
return {
restrict: 'A',
scope: true,
priority: 1000,
compile: function compile(tElem, tAttrs, transclude) {
var templates = childrenToParams(tElem.children());
tElem.html('');
var hasTemplates = !!Object.keys(templates).length;
return function link($scope, elem, attrs) {
var $setHtml = (hasTemplates ? setHtml : setHtmlText).bind(null, elem);
var $setAttr = elem.attr.bind(elem);
var $tmp = [];
$scope.$watch(function() {
return attrs.hyperTranslate;
}, function(str) {
str.split(/ *\; */).forEach(function(part, i) {
if ($tmp[i]) $tmp[i].$destroy();
$tmp[i] = $scope.$new();
init($setHtml, $setAttr, watchParams, lookup, $tmp[i], templates, part);
});
});
};
}
};
}
]);
/**
* Initialize the translation expression and attach it to the element
*/
function init(setHtml, setAttr, watchParams, lookup, $scope, tmplSrc, str) {
// create a new child scope and merge in template sources
var $templates = $scope.$new();
// parse the translation express
var conf = parse(str);
var path = conf.path;
var attr = conf.attr;
var setter = attr === 'html' ? setHtml.bind(null, $scope) : setAttr.bind(null, attr);
// use the children templates if we're setting the inner html
if (attr === 'html') {
for (var tmpl in tmplSrc) {
$templates[tmpl] = tmplSrc[tmpl];
}
}
// lookup the path to the translation in the translate service
var template = noop;
// TODO figure out how to pass the relative time key
var opts = {};
lookup(path, $scope, function(fn, format) {
template = fn ? fn : noop;
opts.format = format;
});
// watch the params and template
watchParams(conf.params, $scope);
$scope.$watch(evalTemplate, setter);
// eval the template with the $templates child scope
function evalTemplate() {
return template($templates).join('');
}
// create a noop for when a template doesn't exist
function noop() {
return BROWSER_ENV === 'development' ? ['!__', path, '__!'] : [];
}
}
/**
* Parse a translate expression into a config
*/
function parse(hyperTranslate) {
var attrParts = hyperTranslate.split('->');
if (attrParts.length === 1) attrParts.unshift('html');
var attr = attrParts[0].trim();
var translations = attrParts[1].trim();
var parts = translations.split('<-');
var path = parts[0].trim();
var params = {};
angular.forEach((parts[1] || '').split(','), function(expr) {
if (expr === '') return;
var parts = expr.trim().split(' as ');
var path = parts[0];
var target = parts[1];
// TODO we should probably offload this to hyper-path
if (!target) {
var pathParts = path.split('.');
target = pathParts[pathParts.length - 1];
}
params[target] = path;
});
return {
path: path,
params: params,
attr: attr
};
}
function childrenToParams(params) {
var acc = {};
var param;
for (var i = 0; i < params.length; i++) {
param = angular.element(params[i]);
var name = param.attr('name');
if (!name) return acc;
acc[name] = param.html();
}
return acc;
}
pkg.name = 'ng-hyper-translate';