All files / src/platform/cache cache-key.builder.ts

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import { Injectable } from '@nestjs/common';
import { CacheNamespace } from './cache-namespace.registry';
 
@Injectable()
export class CacheKeyBuilder {
  private readonly ENV_PREFIX = process.env.NODE_ENV ?? 'dev';
 
  /**
   * Build a standard tenant-scoped cache key.
   * Format: {env}:{namespace}:{tenantId}:{qualifier}
   */
  build(
    namespace: CacheNamespace,
    tenantId: string,
    qualifier: string,
  ): string {
    return `${this.ENV_PREFIX}:${namespace}:${tenantId}:${qualifier}`;
  }
 
  /**
   * Build a user-scoped cache key.
   * Format: {env}:{namespace}:{tenantId}:user:{userId}:{qualifier}
   */
  buildUserKey(
    namespace: CacheNamespace,
    tenantId: string,
    userId: string,
    qualifier: string,
  ): string {
    return `${this.ENV_PREFIX}:${namespace}:${tenantId}:user:${userId}:${qualifier}`;
  }
 
  /**
   * Build a global (non-tenant) cache key for platform-wide data.
   */
  buildGlobal(namespace: CacheNamespace, qualifier: string): string {
    return `${this.ENV_PREFIX}:${namespace}:global:${qualifier}`;
  }
 
  /**
   * Pattern to match and invalidate all keys under a given tenant + namespace.
   */
  tenantPattern(namespace: CacheNamespace, tenantId: string): string {
    return `${this.ENV_PREFIX}:${namespace}:${tenantId}:*`;
  }
 
  /**
   * Pattern to match all user keys under a given tenant + namespace.
   */
  userPattern(
    namespace: CacheNamespace,
    tenantId: string,
    userId: string,
  ): string {
    return `${this.ENV_PREFIX}:${namespace}:${tenantId}:user:${userId}:*`;
  }
}