refactor adapters

adapters/notifications/gateways/DiscordNotificationGateway.ts

@@ -0,0 +1,71 @@
+/**
+ * Infrastructure Adapter: DiscordNotificationAdapter (Stub)
+ * 
+ * Handles Discord webhook notifications.
+ * Currently a stub - to be implemented when Discord integration is needed.
+ */
+
+import type { Notification } from '../../domain/entities/Notification';
+import type { 
+  INotificationGateway, 
+  NotificationDeliveryResult 
+} from '../../application/ports/INotificationGateway';
+import type { NotificationChannel } from '../../domain/types/NotificationTypes';
+
+export interface DiscordAdapterConfig {
+  webhookUrl?: string;
+}
+
+export class DiscordNotificationAdapter implements INotificationGateway {
+  private readonly channel: NotificationChannel = 'discord';
+  private webhookUrl: string | undefined;
+
+  constructor(config: DiscordAdapterConfig = {}) {
+    this.webhookUrl = config.webhookUrl;
+  }
+
+  async send(notification: Notification): Promise<NotificationDeliveryResult> {
+    if (!this.isConfigured()) {
+      return {
+        success: false,
+        channel: this.channel,
+        error: 'Discord webhook URL not configured',
+        attemptedAt: new Date(),
+      };
+    }
+
+    // TODO: Implement actual Discord webhook call
+    // For now, this is a stub that logs and returns success
+    console.log(`[Discord Stub] Would send notification to ${this.webhookUrl}:`, {
+      title: notification.title,
+      body: notification.body,
+      type: notification.type,
+    });
+
+    return {
+      success: true,
+      channel: this.channel,
+      externalId: `discord-stub-${notification.id}`,
+      attemptedAt: new Date(),
+    };
+  }
+
+  supportsChannel(channel: NotificationChannel): boolean {
+    return channel === this.channel;
+  }
+
+  isConfigured(): boolean {
+    return !!this.webhookUrl;
+  }
+
+  getChannel(): NotificationChannel {
+    return this.channel;
+  }
+
+  /**
+   * Configure the webhook URL
+   */
+  setWebhookUrl(url: string): void {
+    this.webhookUrl = url;
+  }
+}

adapters/notifications/gateways/EmailNotificationGateway.ts

@@ -0,0 +1,76 @@
+/**
+ * Infrastructure Adapter: EmailNotificationAdapter (Stub)
+ * 
+ * Handles email notifications.
+ * Currently a stub - to be implemented when email integration is needed.
+ */
+
+import type { Notification } from '../../domain/entities/Notification';
+import type { 
+  INotificationGateway, 
+  NotificationDeliveryResult 
+} from '../../application/ports/INotificationGateway';
+import type { NotificationChannel } from '../../domain/types/NotificationTypes';
+
+export interface EmailAdapterConfig {
+  smtpHost?: string;
+  smtpPort?: number;
+  smtpUser?: string;
+  smtpPassword?: string;
+  fromAddress?: string;
+}
+
+export class EmailNotificationAdapter implements INotificationGateway {
+  private readonly channel: NotificationChannel = 'email';
+  private config: EmailAdapterConfig;
+
+  constructor(config: EmailAdapterConfig = {}) {
+    this.config = config;
+  }
+
+  async send(notification: Notification): Promise<NotificationDeliveryResult> {
+    if (!this.isConfigured()) {
+      return {
+        success: false,
+        channel: this.channel,
+        error: 'Email SMTP not configured',
+        attemptedAt: new Date(),
+      };
+    }
+
+    // TODO: Implement actual email sending
+    // For now, this is a stub that logs and returns success
+    console.log(`[Email Stub] Would send email:`, {
+      to: notification.recipientId, // Would need to resolve to actual email
+      subject: notification.title,
+      body: notification.body,
+      type: notification.type,
+    });
+
+    return {
+      success: true,
+      channel: this.channel,
+      externalId: `email-stub-${notification.id}`,
+      attemptedAt: new Date(),
+    };
+  }
+
+  supportsChannel(channel: NotificationChannel): boolean {
+    return channel === this.channel;
+  }
+
+  isConfigured(): boolean {
+    return !!(this.config.smtpHost && this.config.fromAddress);
+  }
+
+  getChannel(): NotificationChannel {
+    return this.channel;
+  }
+
+  /**
+   * Update SMTP configuration
+   */
+  configure(config: EmailAdapterConfig): void {
+    this.config = { ...this.config, ...config };
+  }
+}

adapters/notifications/gateways/InAppNotificationGateway.ts

@@ -0,0 +1,44 @@
+/**
+ * Infrastructure Adapter: InAppNotificationAdapter
+ * 
+ * Handles in-app notifications (stored in database, shown in UI).
+ * This is the primary/default notification channel.
+ */
+
+import type { Notification } from '../../domain/entities/Notification';
+import type { 
+  INotificationGateway, 
+  NotificationDeliveryResult 
+} from '../../application/ports/INotificationGateway';
+import type { NotificationChannel } from '../../domain/types/NotificationTypes';
+
+export class InAppNotificationAdapter implements INotificationGateway {
+  private readonly channel: NotificationChannel = 'in_app';
+
+  /**
+   * For in_app, sending is essentially a no-op since the notification
+   * is already persisted by the use case. This just confirms delivery.
+   */
+  async send(notification: Notification): Promise<NotificationDeliveryResult> {
+    // In-app notifications are stored directly in the repository
+    // This adapter just confirms the "delivery" was successful
+    return {
+      success: true,
+      channel: this.channel,
+      externalId: notification.id,
+      attemptedAt: new Date(),
+    };
+  }
+
+  supportsChannel(channel: NotificationChannel): boolean {
+    return channel === this.channel;
+  }
+
+  isConfigured(): boolean {
+    return true; // Always configured
+  }
+
+  getChannel(): NotificationChannel {
+    return this.channel;
+  }
+}

adapters/notifications/gateways/NotificationGatewayRegistry.ts

@@ -0,0 +1,67 @@
+/**
+ * Infrastructure: NotificationGatewayRegistry
+ * 
+ * Manages notification gateways and routes notifications to appropriate channels.
+ */
+
+import type { Notification } from '../../domain/entities/Notification';
+import type { NotificationChannel } from '../../domain/types/NotificationTypes';
+import type { 
+  INotificationGateway, 
+  INotificationGatewayRegistry, 
+  NotificationDeliveryResult 
+} from '../../application/ports/INotificationGateway';
+
+export class NotificationGatewayRegistry implements INotificationGatewayRegistry {
+  private gateways: Map<NotificationChannel, INotificationGateway> = new Map();
+
+  constructor(initialGateways: INotificationGateway[] = []) {
+    initialGateways.forEach(gateway => this.register(gateway));
+  }
+
+  register(gateway: INotificationGateway): void {
+    const channel = gateway.getChannel();
+    this.gateways.set(channel, gateway);
+  }
+
+  getGateway(channel: NotificationChannel): INotificationGateway | null {
+    return this.gateways.get(channel) || null;
+  }
+
+  getAllGateways(): INotificationGateway[] {
+    return Array.from(this.gateways.values());
+  }
+
+  async send(notification: Notification): Promise<NotificationDeliveryResult> {
+    const gateway = this.gateways.get(notification.channel);
+    
+    if (!gateway) {
+      return {
+        success: false,
+        channel: notification.channel,
+        error: `No gateway registered for channel: ${notification.channel}`,
+        attemptedAt: new Date(),
+      };
+    }
+
+    if (!gateway.isConfigured()) {
+      return {
+        success: false,
+        channel: notification.channel,
+        error: `Gateway for channel ${notification.channel} is not configured`,
+        attemptedAt: new Date(),
+      };
+    }
+
+    try {
+      return await gateway.send(notification);
+    } catch (error) {
+      return {
+        success: false,
+        channel: notification.channel,
+        error: error instanceof Error ? error.message : 'Unknown error during delivery',
+        attemptedAt: new Date(),
+      };
+    }
+  }
+}