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112 lines
3.3 KiB
JavaScript
112 lines
3.3 KiB
JavaScript
/**
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* # Fetch Data
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* Dynamically build and execute queries on the API
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*/
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const _ = require('lodash'),
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Promise = require('bluebird'),
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api = require('../../../api'),
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defaultPostQuery = {};
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// The default settings for a default post query
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const queryDefaults = {
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type: 'browse',
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resource: 'posts',
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options: {}
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};
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/**
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* Default post query needs to always include author, authors & tags
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*
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* @deprecated: `author`, will be removed in Ghost 3.0
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*/
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_.extend(defaultPostQuery, queryDefaults, {
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options: {
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include: 'author,authors,tags'
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}
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});
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/**
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* ## Process Query
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* Takes a 'query' object, ensures that type, resource and options are set
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* Replaces occurrences of `%s` in options with slugParam
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* Converts the query config to a promise for the result
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*
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* @param {{type: String, resource: String, options: Object}} query
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* @param {String} slugParam
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* @returns {Promise} promise for an API call
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*/
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function processQuery(query, slugParam) {
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query = _.cloneDeep(query);
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// Ensure that all the properties are filled out
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_.defaultsDeep(query, queryDefaults);
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// Replace any slugs, see TaxonomyRouter. We replace any '%s' by the slug
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_.each(query.options, function (option, name) {
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query.options[name] = _.isString(option) ? option.replace(/%s/g, slugParam) : option;
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});
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// Return a promise for the api query
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return api[query.resource][query.type](query.options);
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}
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/**
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* ## Fetch Data
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* Calls out to get posts per page, builds the final posts query & builds any additional queries
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* Wraps the queries using Promise.props to ensure it gets named responses
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* Does a first round of formatting on the response, and returns
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*/
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function fetchData(pathOptions, routerOptions) {
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pathOptions = pathOptions || {};
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routerOptions = routerOptions || {};
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let postQuery = _.cloneDeep(defaultPostQuery),
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props = {};
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if (routerOptions.filter) {
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postQuery.options.filter = routerOptions.filter;
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}
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if (routerOptions.order) {
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postQuery.options.order = routerOptions.order;
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}
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if (pathOptions.hasOwnProperty('page')) {
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postQuery.options.page = pathOptions.page;
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}
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if (pathOptions.hasOwnProperty('limit')) {
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postQuery.options.limit = pathOptions.limit;
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}
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// CASE: always fetch post entries
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// The filter can in theory contain a "%s" e.g. filter="primary_tag:%s"
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props.posts = processQuery(postQuery, pathOptions.slug);
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// CASE: fetch more data defined by the router e.g. tags, authors - see TaxonomyRouter
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_.each(routerOptions.data, function (query, name) {
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props[name] = processQuery(query, pathOptions.slug);
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});
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return Promise.props(props)
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.then(function formatResponse(results) {
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const response = _.cloneDeep(results.posts);
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if (routerOptions.data) {
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response.data = {};
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_.each(routerOptions.data, function (config, name) {
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if (config.type === 'browse') {
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response.data[name] = results[name];
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} else {
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response.data[name] = results[name][config.resource];
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}
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});
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}
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return response;
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});
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}
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module.exports = fetchData;
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