bem-site/gorshochek

'use strict';

const Q  = require('q');

/*
 Для каждой страницы создаем
 поле header.meta в котором находится структура содержащая мета-информацию для header страницы.
 - ogUrl
 - ogType
 - description
 - ogDescription
 - keywords
 - ogKeywords
 */

/**
 * Returns function for page header meta creation
 * @param {Model} model - application model instance
 * @returns {Function}
 * @example
 * var Q = require('q');
 * var gorshochek = require('gorshochek');
 * var model = gorshochek.createModel();
 * Q()
 *    .then(tasks.core.mergeModels(model, {modelPath: './examples/model.ru.json'}))
 *    .then(tasks.page.createHeaderMeta(model))
 *    .then(tasks.core.saveModel(model))
 *    .then(tasks.core.rsync(model, {
 *        dest: './data',
 *        exclude: ['*.meta.json', 'model.json', '*.md']
 *    }))
 *    .done();
 */
module.exports = (model) => {
    return () => {
        const getKeywords = p => {return p.tags ? p.tags.join(', ') : '';};
        model.getPages().forEach(page => {
            page.head || (page.head = {});
            page.head.meta = {
                ogUrl: page.url,
                ogType: 'article',
                description: page.title,
                ogDescription: page.title,
                keywords: getKeywords(page),
                ogKeywords: getKeywords(page)
            };
        });

        return Q(model);
    };
}