All files / src/platform/cache cache-invalidation.service.ts

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import { Injectable } from '@nestjs/common';
import { CacheService } from './cache.service';
import { CacheKeyBuilder } from './cache-key.builder';
import { CacheNamespace } from './cache-namespace.registry';
 
@Injectable()
export class CacheInvalidationService {
  constructor(
    private readonly cacheService: CacheService,
    private readonly keyBuilder: CacheKeyBuilder,
  ) {}
 
  /**
   * Invalidate all cache entries for a specific tenant across a namespace.
   */
  async invalidateByTenant(
    namespace: CacheNamespace,
    tenantId: string,
  ): Promise<void> {
    const pattern = this.keyBuilder.tenantPattern(namespace, tenantId);
    await this.cacheService.invalidatePattern(pattern);
  }
 
  /**
   * Invalidate all cache entries for a specific user.
   */
  async invalidateByUser(
    namespace: CacheNamespace,
    tenantId: string,
    userId: string,
  ): Promise<void> {
    const pattern = this.keyBuilder.userPattern(namespace, tenantId, userId);
    await this.cacheService.invalidatePattern(pattern);
  }
 
  /**
   * Invalidate a specific named entity key.
   */
  async invalidateEntity(
    namespace: CacheNamespace,
    tenantId: string,
    entityId: string,
  ): Promise<void> {
    const key = this.keyBuilder.build(namespace, tenantId, entityId);
    await this.cacheService.del(key);
  }
 
  /**
   * Bulk invalidation across multiple namespaces for a tenant (e.g., after a significant org change).
   */
  async invalidateTenantAllNamespaces(
    tenantId: string,
    namespaces: CacheNamespace[],
  ): Promise<void> {
    await Promise.all(
      namespaces.map((ns) => this.invalidateByTenant(ns, tenantId)),
    );
  }
}