Implement Discord command to list pinned messages (#224)

services/bots/src/discord/commands/common/index.ts

@@ -1,11 +1,13 @@
 import { CommandCommonInfo } from './info';
 import { CommandCommonMessage } from './message';
 import { CommandCommonPing } from './ping';
+import { CommandCommonPinned } from './pinned';
 import { CommandCommonTopic } from './topic';
 
 export const CommandsCommon = [
   CommandCommonInfo,
   CommandCommonMessage,
   CommandCommonPing,
+  CommandCommonPinned,
   CommandCommonTopic,
 ];

services/bots/src/discord/commands/common/pinned.ts

@@ -0,0 +1,50 @@
+import { TransformPipe } from '@discord-nestjs/common';
+import {
+  DiscordTransformedCommand,
+  Payload,
+  TransformedCommandExecutionContext,
+  UsePipes,
+} from '@discord-nestjs/core';
+import { CommandHandler, DiscordCommandClass } from '../../discord.decorator';
+import { BlankDto } from '../../discord.const';
+
+@DiscordCommandClass({
+  name: 'pinned',
+  description: 'Returns pinned messages',
+})
+@UsePipes(TransformPipe)
+export class CommandCommonPinned implements DiscordTransformedCommand<any> {
+  @CommandHandler()
+  async handler(
+    @Payload() handlerDto: BlankDto,
+    { interaction }: TransformedCommandExecutionContext,
+  ): Promise<void> {
+    const pinned = await interaction.channel.messages.fetchPinned();
+
+    if (pinned.size === 0) {
+      await interaction.reply({ content: 'No pinned messages in this channel', ephemeral: true });
+      return;
+    }
+
+    await interaction.reply({
+      embeds: [
+        {
+          title: 'The pinned messages of this channel are:',
+          description: pinned
+            .map(
+              (message) =>
+                `- ["${transformConetent(message.content) || 'embeded content'}"](<${
+                  message.url
+                }>)`,
+            )
+            .join('\n'),
+        },
+      ],
+    });
+  }
+}
+
+const transformConetent = (content: string): string => {
+  const base = content.replace(/\n/g, ' ');
+  return base.length < 64 ? base : `${base.substring(0, 64)}...`;
+};