1 files changed, 81 insertions, 0 deletions
diff --git a/deno/mail-relay/app.ts b/deno/mail-relay/app.ts
new file mode 100644
index 0000000..deb72c2
--- /dev/null
+++ b/deno/mail-relay/app.ts
@@ -0,0 +1,81 @@
+import { join } from "@std/path";
+import { Hono } from "hono";
+import { logger as honoLogger } from "hono/logger";
+
+import log from "./log.ts";
+import config from "./config.ts";
+import { DbService } from "./db.ts";
+import {
+  AliasRecipientMailHook,
+  FallbackRecipientHook,
+  MailDeliverer,
+} from "./mail.ts";
+import { DovecotMailDeliverer } from "./dovecot/deliver.ts";
+import { CronTask, CronTaskConfig } from "./cron.ts";
+import { DumbSmtpServer } from "./dumb-smtp-server.ts";
+
+export abstract class AppBase {
+  protected readonly db: DbService;
+  protected readonly crons: CronTask[] = [];
+  protected readonly routes: Hono[] = [];
+  protected readonly inboundDeliverer: MailDeliverer;
+  protected readonly hono = new Hono();
+
+  protected abstract readonly outboundDeliverer: MailDeliverer;
+
+  constructor() {
+    const dataPath = config.get("dataPath");
+    Deno.mkdirSync(dataPath, { recursive: true });
+    log.path = join(dataPath, "log");
+    log.info(config);
+
+    this.db = new DbService(join(dataPath, "db.sqlite"));
+    this.inboundDeliverer = new DovecotMailDeliverer();
+    this.inboundDeliverer.preHooks.push(
+      new FallbackRecipientHook(new Set(config.getList("inboundFallback"))),
+      new AliasRecipientMailHook(join(dataPath, "aliases.csv")),
+    );
+
+    this.hono.onError((err, c) => {
+      log.error(err);
+      return c.json({ msg: "Server error, check its log." }, 500);
+    });
+
+    this.hono.use(honoLogger());
+    this.hono.post("/send/raw", async (context) => {
+      const body = await context.req.text();
+      if (body.trim().length === 0) {
+        return context.json({ msg: "Can't send an empty mail." }, 400);
+      } else {
+        const result = await this.outboundDeliverer.deliverRaw(body);
+        return context.json({
+          awsMessageId: result.awsMessageId,
+        });
+      }
+    });
+    this.hono.post("/receive/raw", async (context) => {
+      await this.inboundDeliverer.deliverRaw(await context.req.text());
+      return context.json({ "msg": "Done!" });
+    });
+  }
+
+  createCron(config: CronTaskConfig): CronTask {
+    const cron = new CronTask(config);
+    this.crons.push(cron);
+    return cron;
+  }
+
+  async setup() {
+    await this.db.migrate()
+  }
+
+  serve(): { smtp: DumbSmtpServer; http: Deno.HttpServer } {
+    const smtp = new DumbSmtpServer(this.outboundDeliverer);
+    smtp.serve();
+    const http = Deno.serve({
+      hostname: config.HTTP_HOST,
+      port: config.HTTP_PORT,
+    }, this.hono.fetch);
+    return { smtp, http };
+  }
+}