class Permission {
  constructor(params) {
    const read = params.read || false;
    const create = params.create || false;
    // ... add other flags

    return { r: read, c: create, e: true /* default */, s: true, v: true, g: false, d: false };
  }

  toString() {
    let result = 'RESOURCE_';
    ['KNOWLEDGE', 'DOCUMENT'].forEach(type => this[`RESOURCE_${type}_`].keys().forEach(permission => {
      if (this[permission]) {
        result += `${permission.toUpperCase('')}`;
      }
    }));

    return result.trim();
  }

  hasPermission(property) {
    // Check if a specific permission exists within the permission set
    switch (property) {
      case 'READ':
        // Default to read permission since it's always available unless explicitly denied
        return this.r;
      case 'CREATE':
        return this.c && !this.d; // Create allowed except if DELETE flag is also set
      case 'EDIT':
        return this.e && !this.d;
      case 'SYNC':
        return this.s;
      case 'VECTOR':
        return this.v;
      case 'GENERATE':
        return this.g;
      case 'DELETE':
        return this.d;
      default:
        throw new Error(`Unknown property: ${property}`);
    }
  }
}

// Usage
const KnowledgePermissions = new Permission({
  read: true,
  create: true,
  edit: true,
  sync: true,
  vector: true,
  generate: true,
});

console.log(KnowledgePermissions.toString()); // Output: RESOURCE_KNOWLEDGE_READ CREATE EDIT SYNC VECTOR GENERATE