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var path = require('path');
var isarray = require('lodash.isarray');
var pluralize = require('pluralize');
var Q = require('q');
/**
* OKUtils!
* Cross cutting concerns n stuff
*/
module.exports = {
/**
* Takes a meta data query and an array of resource queries
* and returns a promise for an object merging all queried
* data, pluralizing keys where necessary.
*
* Lil bit convoluted, sorry.
*/
fetchTemplateData: function fetchTemplateData(meta, queries, options) {
return Q.promise(function(resolve, reject) {
return Q.all(
[meta.get()].concat(queries.map(function(query) {
return query.get(options);
})))
.then(function(results) {
var metadata = results.shift();
var normalized = results.reduce(function(cache, result, i) {
var resource = queries[i].resource;
var type = queries[i].type;
var plural = pluralize(type);
if (isarray(result)) {
result = result.map(function(data) {
// Inform template of ID in generic way
data.id = data[resource.idField];
return data;
});
} else {
// Inform template of ID in generic way
result.id = result[resource.idField];
result = [result]
}
cache[plural] = cache[plural] || [];
cache[plural] = cache[plural].concat(result);
return cache;
}, {meta: metadata});
resolve(normalized);
}).fail(reject);
});
},
/**
* Return a copy of the route with a trailing slash
*/
withTrailingSlash: function withTrailingSlash(route) {
route = route || '';
return path.normalize(route + '/');
},
/**
* Return a copy of the route without a trailing slash
*/
withoutTrailingSlash: function withoutTrailingSlash(route) {
route = route || '';
return route.charAt(route.length - 1) === '/' ? route.slice(0, -1) : route;
}
};
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