woomy-v2/bot/commands/Bot/help.js

const Embed = require('../../util/embed');
const prettified = require ('../../assets/constants/categories.json');

module.exports = class {
    constructor (name, category) {
        this.name = name,
        this.category = category,
        this.enabled = true,
        this.devOnly = false,
        this.aliases = [],
        this.userPerms = [],
        this.botPerms = [],
        this.cooldown = 2000,
        this.help = {
            description: 'meta :P',
            arguments: '[command/category]',
            details: 'details',
            examples: 'examples'
        };
    }

    run (client, message, args, data) { //eslint-disable-line no-unused-vars
        const commands = client.commands;
        const categories = [];

        commands.forEach(cmd => {
            if (!categories.includes(cmd.category)) {
                if (cmd.category === 'Developer' && !client.config.ownerIDs.includes(message.author.id)) return;
                categories.push(cmd.category);
            } 
        });

        if (!args[0]) {
            const embed = new Embed();
            embed.setTitle('Help & Commands');
            embed.setColour(client.functions.displayHexColour(message.channel.guild, client.user.id));
            embed.setDescription(
                `» Use \`${message.prefix}help [category]\` to get basic information on all commands in the category.   
                » Use \`${message.prefix}help [command]\` to get full information on a specific command.
                » [Click here](https://discord.gg/HCF8mdv) to join my Discord server if you need help, or just want to hang out!`
            );
            categories.forEach(category => {
                embed.addField(`${prettified[category].emoji} **${category}**`, `*${prettified[category].description}*\n${client.commands.filter(cmd => cmd.category === category).length} commands`, true);
            });
            embed.setFooter('<> = required, / = either/or, [] = optional');

            return message.channel.createMessage({ embed: embed });
        }

        const cat = args[0].toProperCase();
        const cmd = args[0].toLowerCase();

        if (categories.includes(cat)) {
            let cmds = '';
            const filteredCmds = client.commands.filter(cmd => cmd.category === cat);

            filteredCmds.forEach(cmd => {
                let params = '';
                if (cmd.help.arguments.length > 0) params = '`' + cmd.help.arguments + '`';
                cmds += `**${message.prefix + cmd.name}** ${params} ✦ ${cmd.help.description}\n`;
            });

            const embed = new Embed()
                .setTitle(prettified[cat].emoji + ' ' + cat)
                .setColour(client.functions.displayHexColour(message.channel.guild, client.user.id))
                .setDescription(cmds)
                .setFooter('<> = required, / = either/or, [] = optional');
            
            return message.channel.createMessage({ embed: embed });
        }

        if (client.commands.has(cmd) || client.aliases.has(cmd)) {
            const command = client.commands.get(cmd) || client.commands.get(client.aliases.get(cmd));
            const embed = new Embed()
                .setTitle(prettified[command.category].emoji + ' ' + command.category + ' -> ' + command.name.toProperCase())
                .setColour(client.functions.displayHexColour(message.channel.guild, client.user.id))
                .setDescription(command.help.description)
                .addField('**Format:**', `\`${message.prefix + command.name} ${command.help.arguments}`.trim() + '`');
            if (command.help.details.length > 0) embed.addField('**Parameters:**', command.help.details);
            if (command.help.examples.length > 0) embed.addField('**Examples**', command.help.examples);
            if (command.aliases.length > 0) embed.addField('**Aliases:**', '`' + command.aliases.join('`, `') + '`');
            if (command.userPerms.length > 0) embed.addField('**User permissions:**', command.userPerms.join(', '), true);
            if (command.botPerms.length > 0) embed.addField('**Bot permissions:', command.botPerms.join(', '), true);
            embed.addField('**Cooldown:**', `${command.cooldown / 1000} seconds`, true);
            embed.setFooter('<> = required, / = either/or, [] = optional');
            return message.channel.createMessage({ embed: embed });
        }

        return message.channel.createMessage(`${client.constants.emojis.userError} ${cmd} doesn't appear to be a command, alias, or category. Are you sure you spelt it right?`);
    }
};