refactor(server): config system (#11081)

packages/backend/server/src/plugins/oauth/providers/def.ts

@@ -1,4 +1,8 @@
+import { Inject, Injectable, Logger } from '@nestjs/common';
+
+import { Config, OnEvent } from '../../../base';
 import { OAuthProviderName } from '../config';
+import { OAuthProviderFactory } from '../factory';
 
 export interface OAuthAccount {
   id: string;
@@ -13,9 +17,42 @@ export interface Tokens {
   expiresAt?: Date;
 }
 
+@Injectable()
 export abstract class OAuthProvider {
   abstract provider: OAuthProviderName;
   abstract getAuthUrl(state: string): string;
   abstract getToken(code: string): Promise<Tokens>;
   abstract getUser(token: string): Promise<OAuthAccount>;
+
+  protected readonly logger = new Logger(this.constructor.name);
+  @Inject() private readonly factory!: OAuthProviderFactory;
+  @Inject() private readonly AFFiNEConfig!: Config;
+
+  get config() {
+    return this.AFFiNEConfig.oauth.providers[this.provider];
+  }
+
+  get configured() {
+    return this.config && this.config.clientId && this.config.clientSecret;
+  }
+
+  @OnEvent('config.init')
+  onConfigInit() {
+    this.setup();
+  }
+
+  @OnEvent('config.changed')
+  onConfigUpdated(event: Events['config.changed']) {
+    if ('oauth' in event.updates) {
+      this.setup();
+    }
+  }
+
+  protected setup() {
+    if (this.configured) {
+      this.factory.register(this);
+    } else {
+      this.factory.unregister(this);
+    }
+  }
 }