lib/index.js
'use strict';
const baseXml = require('xml');
class TR {
constructor(options, items) {
options = options || {};
this.title = options.title || '';
this.link = options.link || '';
this.description = options.description || '';
this.language = options.language || 'ru';
this.items = [];
if (Array.isArray(items) && items.length > 0) {
const self = this;
items.forEach(function (item) {
self.item(item);
});
}
}
xml() {
return baseXml(this.generateXML(this));
}
item(data) {
data = data || {};
this.items.push(
this.itemData(data)
);
return this;
}
/**
* Check first argument. If true - push last argument to second argument
*
* @param condition
* @param array
* @param data
*/
pushIfConditionTrue(condition, array, data) {
if (condition) {
array.push(data);
}
}
/**
* @param related
* @param itemValues
* @param relatedInfinity
*/
addRelated(related, itemValues, relatedInfinity) {
const relatedResult = related.map(function (rel) {
return {
link: [{
_attr: {
'url': rel.link,
'img': rel.image_url
}
}, rel.text]
};
});
if (relatedInfinity) {
relatedResult.push({
_attr: {'type': 'infinity'}
});
}
this.pushIfConditionTrue(related, itemValues, {'yandex:related': relatedResult});
}
/**
* @param item
* @param itemValues
*/
pushGoals(item, itemValues) {
if (item.goals.length > 0) {
item.goals.forEach(goal => itemValues.push({
'turbo:goal': {
_attr: {
type: goal.type || 'yandex',
'turbo-goal-id': goal.id,
name: goal.name,
id: goal.counter_id,
}
}
}));
}
}
getImageContent(item) {
if (item.image_url.length > 0) {
let imageCaption = '';
if (item.image_caption.length > 0) {
imageCaption = `<figcaption>${item.image_caption}</figcaption>`;
}
return `<figure><img src="${item.image_url}" />${imageCaption}</figure>`;
}
return '';
}
getSubheading(item) {
if (item.subheading.length > 0) {
return `<h2>${item.subheading}</h2>`;
}
return '';
}
getLinksString(links) {
return links.map(function (item) {
return `<a href="${item.link}">${item.text}</a>`;
}).join('');
}
getMenu(item) {
if (Array.isArray(item.menu) && item.menu.length > 0) {
return `<menu>${this.getLinksString(item.menu)}</menu>`;
}
return '';
}
getBreadcrumbs(item) {
if (Array.isArray(item.breadcrumbs) && item.breadcrumbs.length > 0) {
return `<div data-block="breadcrumblist">${this.getLinksString(item.breadcrumbs)}</div>`;
}
return '';
}
/**
* Items processing
* @param items
* @param channel
*/
itemsProcessing(items, channel) {
const self = this;
items.forEach(function (item) {
const itemValues = [];
itemValues.push({_attr: {'turbo': item.turboEnabled ? 'true' : 'false'}});
itemValues.push({link: item.url});
self.pushIfConditionTrue(item.extendedHtml, itemValues, {'turbo:extendedHtml': 'true'});
self.pushIfConditionTrue(item.turboSource, itemValues, {'turbo:source': item.turboSource});
self.pushIfConditionTrue(item.turboTopic, itemValues, {'turbo:topic': item.turboTopic});
self.pushIfConditionTrue(item.date, itemValues, {pubDate: new Date(item.date).toUTCString()});
self.pushIfConditionTrue(item.author, itemValues, {author: item.author});
const fullContent = `<header>${self.getImageContent(item)}<h1>${item.title}</h1>${self.getSubheading(item)}${self.getMenu(item)}${self.getBreadcrumbs(item)}</header>${item.content}`;
self.pushGoals(item, itemValues);
itemValues.push({'turbo:content': {_cdata: fullContent}});
if (typeof item.related !== 'undefined') {
self.addRelated(item.related, itemValues, item.relatedInfinity);
}
channel.push({item: itemValues});
});
}
/**
* @param options
*
* @returns {{rss: *[]}}
*/
generateXML(options) {
const channel = [];
channel.push({title: {_cdata: options.title}});
channel.push({link: options.link});
channel.push({description: {_cdata: options.description}});
channel.push({language: options.language});
this.itemsProcessing(options.items, channel);
const _attr = {
'xmlns:yandex': 'http://news.yandex.ru',
'xmlns:media': 'http://search.yahoo.com/mrss/',
'xmlns:turbo': 'http://turbo.yandex.ru',
version: '2.0'
};
return {
rss: [
{_attr: _attr},
{channel: channel}
]
};
}
/**
* @param data
* @returns {*}
*/
itemData(data) {
return {
title: data.title || '', // h1
subheading: data.subheading || '', // h2
image_url: data.image_url || '',
image_caption: data.image_caption || '',
url: data.url || data.link,
author: data.author,
date: data.date || data.pubDate,
content: data.content,
menu: data.menu || [],
breadcrumbs: data.breadcrumbs || [],
related: data.related,
relatedInfinity: data.relatedInfinity || false,
turboSource: data.turboSource || '',
turboTopic: data.turboTopic || '',
goals: data.goals || [],
turboEnabled: data.turboEnabled !== undefined ? data.turboEnabled : true,
extendedHtml: data.extendedHtml || false,
};
}
}
module.exports = TR;