feat: help command (#36)

- command.data easier to use
- store commands categories
- ping command more readable
- store commands in a different way (cf. categories)
- update translations
- add string.capitalize() extension
- lowercase command names in localized thing

Reviewed-on: https://git.kennel.ml/ConfrerieDuKassoulait/Botanique/pulls/36

src/commands/loader.ts

@@ -2,6 +2,7 @@ import { REST } from '@discordjs/rest';
 import { Routes } from 'discord-api-types/v9';
 import { Client } from 'discord.js';
 import { readdir } from 'fs/promises';
+import { removeExtension } from '../utils/misc';
 
 /** Load all the commands. */
 export default async (client: Client) => {
@@ -17,6 +18,12 @@ export default async (client: Client) => {
 				// Retrieve all the commands
 				const command_files = await readdir(`${__dirname}/${command_category}`);
 
+				// Add the category to the collection for the help command
+				client.commands.categories.set(
+					command_category,
+					command_files.map(removeExtension),
+				);
+
 				// Add the command
 				return Promise.all(
 					command_files.map(async command_file => {
@@ -25,9 +32,10 @@ export default async (client: Client) => {
 						).default;
 
 						// Add it to the collection so the interaction will work
-						client.commands.set(command.data(client).name, command);
+						command.data = command.data(client);
+						client.commands.list.set(command.data.name, command);
 
-						return command.data(client).toJSON();
+						return command.data.toJSON();
 					}),
 				);
 			}),

src/commands/misc/help.ts

@@ -0,0 +1,94 @@
+import { SlashCommandBuilder } from '@discordjs/builders';
+import { Locale } from 'discord-api-types/v9';
+import { Client, CommandInteraction, MessageEmbed } from 'discord.js';
+import { getLocale, getLocalizations } from '../../utils/locales';
+import { getFilename } from '../../utils/misc';
+import '../../modules/string';
+
+export default {
+	data: (client: Client) => {
+		const filename = getFilename(__filename);
+		return new SlashCommandBuilder()
+			.setName(
+				filename.toLowerCase())
+			.setDescription(client.locales.get(client.config.default_lang)
+				?.get(`c_${filename}_desc`) ?? '')
+			.setNameLocalizations(
+				getLocalizations(client, `c_${filename}_name`, true))
+			.setDescriptionLocalizations(
+				getLocalizations(client, `c_${filename}_desc`))
+
+			// Command option
+			.addStringOption(option => option
+				.setName(client.locales.get(client.config.default_lang)
+					?.get(`c_${filename}_opt1_name`) ?? '')
+				.setDescription(client.locales.get(client.config.default_lang)
+					?.get(`c_${filename}_opt1_desc`) ?? '')
+				.setNameLocalizations(
+					getLocalizations(client, `c_${filename}_opt1_name`, true))
+				.setDescriptionLocalizations(
+					getLocalizations(client, `c_${filename}_opt1_desc`))
+			);
+	},
+
+	interaction: async (interaction: CommandInteraction, client: Client) => {
+		const loc = getLocale(client, interaction.locale);
+		const desired_command = interaction.options.getString(client
+			.locales
+			.get(client.config.default_lang)
+			?.get(`c_${getFilename(__filename)}_opt1_name`) ?? '');
+
+		// If a command isn't specified
+		if (!desired_command) {
+			const fields: {
+				name: string;
+				value: string;
+			}[] = [];
+
+			// Load all the command per categories
+			client.commands.categories.forEach((commands_name, category) => {
+				const commands = commands_name.reduce((data, command_name) => {
+					return data + `\`/${command_name}\`, `;
+				}, '');
+
+				fields.push({
+					name: category.capitalize() + ` (${commands_name.length})`,
+					value: commands.slice(0, -2),
+				});
+			});
+
+			// Sends a list of commands sorted into categories
+			return interaction.reply({ embeds: [
+				new MessageEmbed()
+					.setColor('BLURPLE')
+					.setTitle(loc.get('c_help1'))
+					.setDescription(loc.get('c_help2'))
+					.addFields(fields),
+			] });
+		}
+
+		// If a command is specified
+		const command = client.commands.list.get(desired_command);
+		if (!command) {
+			// Command don't exist
+			return interaction.reply({
+				content: `${loc.get('c_help3')} \`${desired_command}\``,
+				ephemeral: true,
+			});
+		}
+
+		// Send information about the command
+		return interaction.reply({ embeds: [
+			new MessageEmbed()
+				.setColor('BLURPLE')
+				.setTitle('`/' + command.data.name + '`')
+				.setDescription(
+					// Loads the description
+					// according to the user's locals
+					command.data.description_localizations
+						?.[interaction.locale as Locale]
+						?? command.data.description
+				),
+		] });
+	},
+};

src/commands/misc/ping.ts

@@ -7,16 +7,24 @@ export default {
 	data: (client: Client) => {
 		const filename = getFilename(__filename);
 		return new SlashCommandBuilder()
-			.setName(filename.toLowerCase())
+			.setName(
-			.setDescription(client.locales.get(client.config.default_lang)?.get(`c_${filename}_desc`) ?? '?')
+				filename.toLowerCase())
-			.setNameLocalizations(getLocalizations(client, `c_${filename}_name`))
+			.setDescription(client.locales.get(client.config.default_lang)
-			.setDescriptionLocalizations(getLocalizations(client, `c_${filename}_desc`));
+				?.get(`c_${filename}_desc`) ?? '')
+			.setNameLocalizations(
+				getLocalizations(client, `c_${filename}_name`, true))
+			.setDescriptionLocalizations(
+				getLocalizations(client, `c_${filename}_desc`)
+			);
 	},
 
 	interaction: async (interaction: CommandInteraction, client: Client) => {
 		const loc = getLocale(client, interaction.locale);
 
-		const sent = await interaction.reply({ content: 'Pinging...', fetchReply: true }) as Message;
+		const sent = await interaction.reply({
+			content: 'Pinging...',
+			fetchReply: true,
+		}) as Message;
 
 		interaction.editReply(
 			`${loc?.get('c_ping1')}: \

src/events/interactions/interactionCreate.ts

@@ -4,7 +4,7 @@ import { getLocale } from '../../utils/locales';
 /** https://discord.js.org/#/docs/discord.js/main/class/Client?scrollTo=e-interactionCreate */
 export default (interaction: Interaction, client: Client) => {
 	if (interaction.isCommand()) {
-		const command = client.commands.get(interaction.commandName);
+		const command = client.commands.list.get(interaction.commandName);
 		if (!command) {
 			const loc = getLocale(client, interaction.locale);
 			return interaction.reply({

src/locales/en-US.json

@@ -1,7 +1,16 @@
 {
 	"e_interacreate_no_command": "Sorry, the command probably no longer exists...",
 
+	"c_ping_name": "Ping",
 	"c_ping_desc": "Pong!",
 	"c_ping1": "Roundtrip latency",
-	"c_ping2": "Websocket heartbeat"
+	"c_ping2": "Websocket heartbeat",
+
+	"c_help_name": "Help",
+	"c_help_desc": "Informations about commands",
+	"c_help_opt1_name": "command",
+	"c_help_opt1_desc": "Command wanted in depth.",
+	"c_help1": "List of categories and associated commands",
+	"c_help2": "`/help <command>` to get more information about a command.",
+	"c_help3": "Can't find :"
 }

src/locales/fr.json

@@ -1,7 +1,16 @@
 {
 	"e_interacreate_no_command": "Désolé, la commande n'existe plus...",
 
+	"c_ping_name": "Ping",
 	"c_ping_desc": "Pong!",
 	"c_ping1": "Latence totale",
-	"c_ping2": "Latence du Websocket"
+	"c_ping2": "Latence du Websocket",
+
+	"c_help_name": "Aide",
+	"c_help_desc": "Informations sur les commandes",
+	"c_help_opt1_name": "commande",
+	"c_help_opt1_desc": "Commande voulu en détail.",
+	"c_help1": "Liste des catégories et des commandes associées",
+	"c_help2": "`/help <commande>` pour obtenir plus d'informations sur une commande.",
+	"c_help3": "Impossible de trouver :"
 }

src/modules/string.ts

@@ -0,0 +1,16 @@
+export {};
+
+declare global {
+	// Declarations
+	interface String {
+		/**
+		 * Returns a copy of the string with the first letter capitalized.
+		 */
+		capitalize(): string,
+	}
+}
+
+/** Capitalize definition */
+String.prototype.capitalize = function(this: string) {
+	return this[0].toUpperCase() + this.substring(1);
+};

src/utils/client.ts

@@ -16,13 +16,25 @@ declare module 'discord.js' {
 			default_lang: string
 		},
 		/** Store all the slash commands */
-		commands: Collection<
+		commands: {
+			categories: Collection<
+				/** Category name */
 				string,
+				/** Name of the commands in the category  */
+				string[]
+			>,
+			list: Collection<
+				/** Command name */
+				string,
+				/** Command itself */
 				{
+					/** Data about the command */
 					data: SlashCommandBuilder,
+					/** How the command interact */
 					interaction: (interaction: CommandInteraction, client: Client) => unknown
 				}
 			>,
+		}
 		/** Store all the localizations */
 		locales: Map<string, Map<string, string>>
     }
@@ -42,7 +54,10 @@ export default async () => {
 		default_lang: process.env.DEFAULT_LANG ?? 'fr',
 	};
 
-	client.commands = new Collection();
+	client.commands = {
+		categories: new Collection(),
+		list: new Collection(),
+	};
 
 	console.log('Translations progression :');
 	client.locales = await loadLocales(client.config.default_lang);

src/utils/locales.ts

@@ -53,18 +53,21 @@ export const loadLocales = async (default_lang: string) => {
  * @param text Name of string to fetch
  * @returns the dictionary
  */
-export const getLocalizations = (client: Client, text: string) => {
+export const getLocalizations = (client: Client, text: string, lowercase = false) => {
 	const data: Record<string, string> = {};
 
 	// Load all the localizations
 	client.locales.forEach((locale, lang) => {
 		// Fetch the text and fallback to default lang if needed
 		// See getLocale for more info on why we *can* fallback
-		const str = locale.get(text)
+		let str = locale.get(text)
 			?? client.locales.get(client.config.default_lang)?.get(text);
 
 		// Store it if defined
 		if (str !== undefined) {
+			if (lowercase) {
+				str = str.toLowerCase();
+			}
 			data[lang] = str;
 		}
 	});