48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
/**
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* Service which helps set the contents of the <meta> tags (and the <title> of a page).
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*/
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angular.module('quay').factory('MetaService', ['$interpolate', '$timeout', function($interpolate, $timeout) {
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var metaService = {};
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var interpolate = function(page, expr) {
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if (!expr) {
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return null;
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}
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var inter = $interpolate(expr, true, null, true);
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if (!inter) {
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return expr.toString();
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}
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return inter(page.scope);
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};
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var interpolationPromise = function(page, fieldGetter) {
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return new Promise(function(resolve, reject) {
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if (!page || !page.$$route) {
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resolve(null);
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return;
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}
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if (page.scope) {
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resolve(interpolate(page, fieldGetter()));
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return;
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}
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// Timeout needed because page.scope is initially undefined.
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$timeout(function() {
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resolve(interpolationPromise(page, fieldGetter));
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}, 10);
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});
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};
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metaService.getTitle = function(page) {
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return interpolationPromise(page, () => page.$$route.title);
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};
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metaService.getDescription = function(page) {
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return interpolationPromise(page, () => page.$$route.description);
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};
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return metaService;
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}]);
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