Add help command

1 files changed, 47 insertions, 0 deletions

diff --git a/src/commands/help.ts b/src/commands/help.ts
new file mode 100644
index 0000000..97cafa4
--- /dev/null
+++ b/src/commands/help.ts
@@ -0,0 +1,47 @@
+import {Message} from 'discord.js';
+import {injectable} from 'inversify';
+import Command from '.';
+import {TYPES} from '../types';
+import {Settings} from '../models';
+import container from '../inversify.config';
+
+@injectable()
+export default class implements Command {
+  public name = 'help';
+  public examples = [
+    ['help', 'you don\'t need a description']
+  ];
+
+  private commands: Command[] = [];
+
+  public async execute(msg: Message, _: string []): Promise<void> {
+    if (this.commands.length === 0) {
+      // Lazy load to avoid circular dependencies
+      this.commands = container.getAll<Command>(TYPES.Command);
+    }
+
+    const settings = await Settings.findOne({where: {guildId: msg.guild!.id}});
+
+    if (!settings) {
+      return;
+    }
+
+    const {prefix} = settings;
+
+    const res = this.commands.sort((a, b) => a.name.localeCompare(b.name)).reduce((content, command) => {
+      content += `**${command.name}**:\n`;
+
+      command.examples.forEach(example => {
+        content += `- \`${prefix}${example[0]}\`: ${example[1]}\n`;
+      });
+
+      content += '\n';
+
+      return content;
+    }, '');
+
+    await msg.author.send(res);
+    await msg.react('🇩');
+    await msg.react('🇲');
+  }
+}