xiao/commands/search/wikipedia.js

const commando = require('discord.js-commando');
const Discord = require('discord.js');
const request = require('superagent');

module.exports = class WikipediaCommand extends commando.Command {
    constructor(Client) {
        super(Client, {
            name: 'wikipedia',
            group: 'search',
            memberName: 'wikipedia',
            description: 'Searches Wikipedia for something. (;wikipedia Cat)',
            examples: [';wikipedia Cat']
        });
    }

    async run(message) {
        if (message.channel.type !== 'dm') {
            if (!message.channel.permissionsFor(this.client.user).hasPermission(['SEND_MESSAGES', 'READ_MESSAGES', 'EMBED_LINKS'])) return;
        }
        console.log(`[Command] ${message.content}`);
        let thingToSearch = encodeURI(message.content.split(" ").slice(1).join(" "));
        thingToSearch = thingToSearch.split(")").join("%29");
        return request
            .get(`https://en.wikipedia.org/w/api.php?action=query&prop=extracts&format=json&titles=${thingToSearch}&exintro=&explaintext=&redirects=&formatversion=2`)
            .then(function(response) {
                let description = response.body.query.pages[0].extract;
                let name = response.body.query.pages[0].title;
                if (!description) {
                    return message.channel.send(":x: Error! Entry Not Found!");
                }
                else {
                    description = description.substr(0, 1900);
                    description = description.split('\n').join("\n\n");
                    const embed = new Discord.RichEmbed()
                        .setColor(0xE7E7E7)
                        .setTitle(name)
                        .setURL(`https://en.wikipedia.org/wiki/${thingToSearch}`)
                        .setAuthor("Wikipedia", "https://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/1122px-Wikipedia-logo-v2.svg.png")
                        .setDescription(`${description} [Read the Rest Here](https://en.wikipedia.org/wiki/${thingToSearch})`);
                    return message.channel.sendEmbed(embed).catch(console.error);
                }
            }).catch(function(err) {
                console.log(err);
                return message.channel.send(":x: Error! Entry Not Found!");
            });
    }
};