feat: bootstrap from Fabric monorepo

src/channels/channels.service.ts

@@ -0,0 +1,31 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { Channel } from '../entities/channel.entity';
+
+@Injectable()
+export class ChannelsService {
+  constructor(
+    @InjectRepository(Channel)
+    private readonly channelRepo: Repository<Channel>,
+  ) {}
+
+  listByGuild(guildId: string) {
+    return this.channelRepo.find({
+      where: { guildId },
+      order: { createdAt: 'ASC' },
+      take: 200,
+    });
+  }
+
+  create(input: Partial<Channel>) {
+    const channel = this.channelRepo.create({
+      guildId: String(input.guildId ?? ''),
+      name: String(input.name ?? ''),
+      kind: input.kind === 'announcement' ? 'announcement' : 'text',
+      isPrivate: Boolean(input.isPrivate),
+      lastSeq: 0,
+    });
+    return this.channelRepo.save(channel);
+  }
+}