refactor(server): config system (#11081)

packages/backend/server/src/plugins/customerio/config.ts

@@ -0,0 +1,22 @@
+import { defineModuleConfig } from '../../base';
+
+declare global {
+  interface AppConfigSchema {
+    customerIo: {
+      enabled: boolean;
+      token: string;
+    };
+  }
+}
+
+defineModuleConfig('customerIo', {
+  enabled: {
+    desc: 'Enable customer.io integration',
+    default: false,
+  },
+  token: {
+    desc: 'Customer.io token',
+    default: '',
+    schema: { type: 'string' },
+  },
+});

packages/backend/server/src/plugins/customerio/index.ts

@@ -0,0 +1,10 @@
+import './config';
+
+import { Module } from '@nestjs/common';
+
+import { CustomerIoService } from './service';
+
+@Module({
+  providers: [CustomerIoService],
+})
+export class CustomerIoModule {}

packages/backend/server/src/plugins/customerio/service.ts

@@ -0,0 +1,72 @@
+import { Injectable } from '@nestjs/common';
+
+import { Config, OnEvent } from '../../base';
+
+@Injectable()
+export class CustomerIoService {
+  #fetch: ((url: string, options?: RequestInit) => Promise<Response>) | null =
+    null;
+  constructor(private readonly config: Config) {}
+
+  @OnEvent('config.init')
+  setup() {
+    const { enabled, token } = this.config.customerIo;
+    if (enabled && token) {
+      this.#fetch = (url, options) => {
+        return fetch(url, {
+          ...options,
+          headers: {
+            Authorization: `Basic ${token}`,
+            'Content-Type': 'application/json',
+            ...options?.headers,
+          },
+        });
+      };
+    } else {
+      this.#fetch = null;
+    }
+  }
+
+  @OnEvent('config.changed')
+  onConfigChanged(event: Events['config.changed']) {
+    if (event.updates.customerIo) {
+      this.setup();
+    }
+  }
+
+  @OnEvent('user.created')
+  @OnEvent('user.updated')
+  async onUserUpdated(user: Events['user.updated'] | Events['user.created']) {
+    await this.#fetch?.(
+      `https://track.customer.io/api/v1/customers/${user.id}`,
+      {
+        method: 'PUT',
+        body: JSON.stringify({
+          name: user.name,
+          email: user.email,
+          created_at: Number(user.createdAt) / 1000,
+        }),
+      }
+    );
+  }
+
+  @OnEvent('user.deleted')
+  async onUserDeleted(user: Events['user.deleted']) {
+    if (user.emailVerifiedAt) {
+      // suppress email if email is verified
+      await this.#fetch?.(
+        `https://track.customer.io/api/v1/customers/${user.email}/suppress`,
+        {
+          method: 'POST',
+        }
+      );
+    }
+
+    await this.#fetch?.(
+      `https://track.customer.io/api/v1/customers/${user.id}`,
+      {
+        method: 'DELETE',
+      }
+    );
+  }
+}