todo model and start of cmd

commands/utility/todo.js

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+const Discord = require('discord.js');
+
+const TD = require('../../models/todo');
+
+const ask = require('../../util/ask');
+
+module.exports = {
+    name: "todo",
+    aliases: ['td'],
+    meta: {
+        category: 'Utility',
+        description: "Create and manage your To-Do lists!",
+        syntax: '`todo <add|list|delete|edit|view|complete|uncomplete>`',
+        extra: null
+    },
+    help: new Discord.MessageEmbed()
+    .setTitle("Help -> To-Do Lists")
+    .setDescription("Create and manage your To-Do lists. You can use the commands like `add` or `view` without specifying a list to see your `quick` list, which is just quick random stuff. Otherwise, you can specify a list name first to manage it.")
+    .addField("Syntax", "`todo <add|list|delete|edit|view|complete|uncomplete>`"),
+    async execute(message, msg, args, cmd, prefix, mention, client) {
+        if (!args.length) {return message.channel.send(`Syntax: \`${prefix}todo <add|list|delete|edit|view|complete|uncomplete>\``);}
+
+        if (['add', 'a'].includes(args[0].toLowerCase())) {
+            let list = 'quick';
+            let td = await TD.findOne({uid: message.author.id});
+            if (td && td.lists.quick.length > 20) {return message.channel.send("Sorry, but your list can only have 20 items or less.");}
+            let item;
+            if (!args[1]) {item = await ask(message, "What would you like to your quick list?", 90000); if (!item) {return;}}
+            else {args.shift(); item = args.join(" ");}
+            if (item.length > 100) {return message.channel.send("ToDo items can only be less than 100 characters.");}
+            td = td || new TD({uid: message.author.id});
+            td.lists.quick.push(item);
+            td.markModified(`lists.${list}`);
+            td.save();
+            return message.channel.send(new Discord.MessageEmbed()
+                .setAuthor("To-Do Added!", message.author.avatarURL())
+                .setDescription(`${item}\n\`->\` In list '${list}'`)
+                .setColor('c375f0')
+            );
+        }
+
+        else if (['v', 'view'].includes(args[0].toLowerCase())) {
+            let list = 'quick';
+            let td = await TD.findOne({uid: message.author.id});
+            if (!td) {return message.channel.send("You don't have any todo lists!");}
+            if (!td.lists[list]) {return message.channel.send("That list doesn't exist!");}
+            if (!td.lists[list].length) {return message.channel.send("That list is empty!");}
+            let s = '';
+            let n = 0; let i; for (i of td.lists[list]) {n++; s += `**${n}.** ${i}\n`;}
+            return message.channel.send(new Discord.MessageEmbed()
+                .setAuthor(message.guild ? message.member.displayName : message.author.username, message.author.avatarURL())
+                .setTitle(list === "quick" ? "Personal Quick List" : `List "${list}"`)
+                .setDescription(s)
+                .setColor("c375f0")
+                .setFooter("Natsuki")
+                .setTimestamp()
+            );
+        }
+    }
+};

models/todo.js

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+const mongoose = require('mongoose');
+
+const td = new mongoose.Schema({
+    uid: {type: String, unique: true},
+    lists: {type: Object, default: {quick: []}},
+    publicLists: {type: Object, default: {}}
+});
+
+module.exports = mongoose.model('todo', td);