summaly/src/plugins/wikipedia.ts

import * as URL from 'url';
import * as request from 'request-promise-native';
import * as debug from 'debug';
import summary from '../summary';
import clip from './../utils/clip';

const log = debug('summaly:plugins:wikipedia');

export function test(url: URL.Url): boolean {
	return /\.wikipedia\.org$/.test(url.hostname);
}

export async function summarize(url: URL.Url): Promise<summary> {
	const lang = url.host.split('.')[0];
	const title = url.pathname.split('/')[2];
	const endpoint = `https://${lang}.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=&titles=${encodeURIComponent(title)}`;

	log(`lang is ${lang}`);
	log(`title is ${title}`);
	log(`endpoint is ${endpoint}`);

	let body = await request(endpoint);
	body = JSON.parse(body);
	log(body);

	if (!('query' in body) || !('pages' in body.query)) {
		throw 'fetch failed';
	}

	const info = body.query.pages[Object.keys(body.query.pages)[0]];

	return {
		title: info.title,
		icon: 'https://wikipedia.org/static/favicon/wikipedia.ico',
		description: clip(info.extract, 300),
		thumbnail: `https://wikipedia.org/static/images/project-logos/${lang}wiki.png`,
		player: null,
		sitename: 'Wikipedia'
	};
}