HIPAA-Compliant Database Wrapper: Sprint 1 Plan

Sprint Overview

Sprint Details
Sprint Number	1
Phase	Foundation
Duration	2 weeks (Jan 1 - Jan 14, 2025)
Story Points	34
Focus	Initial Architecture

Sprint Objective

Establish the foundation for the HIPAA-compliant database wrapper with basic connectivity, schema design, and core architecture. By the end of this sprint, we should have a working connection to PostgreSQL, a schema definition system with PHI marking, and basic CRUD operations flowing through the security architecture.

Sprint Planning

User Stories

ID	User Story	Acceptance Criteria	Points	Assignee	Priority
US1.1	As a developer, I want to connect to a PostgreSQL database through the wrapper	• Connection established with proper credentials • Connection pooling implemented • Error handling for connection issues • Configuration validation • Automatic reconnection capability	5	Backend Dev 1	P0
US1.2	As a developer, I want to define database schemas with PHI indicators	• Schema definition API created • PHI field marking supported • Schema validation implemented • Types definition generation • Default values support	8	Backend Dev 1	P0
US1.3	As a system architect, I need a multi-layered security design	• Security architecture documented • Implementation plan created • Security review completed • Component interfaces defined • Security flow diagrams created	5	Security Engineer	P0
US1.4	As a developer, I want basic CRUD operations working through the wrapper	• Create operation implemented • Read operation implemented • Update operation implemented • Delete operation implemented • Basic error handling • Transaction support foundation	13	Backend Dev 2	P0
US1.5	As a developer, I want to initialize the wrapper with configuration options	• Configuration schema defined • Validation of configuration • Sensible defaults provided • Environment variable support • Configuration documentation	3	Backend Dev 2	P1

Sprint Backlog Tasks

Task	Description	Estimate (hours)	Assignee	Dependencies
US1.1 Tasks
T1.1.1	Set up PostgreSQL connection module	4	Backend Dev 1	None
T1.1.2	Implement connection pooling	6	Backend Dev 1	T1.1.1
T1.1.3	Add error handling and retry logic	4	Backend Dev 1	T1.1.1
T1.1.4	Write connection tests	2	Backend Dev 1	T1.1.1, T1.1.2
T1.1.5	Create connection documentation	2	Backend Dev 1	T1.1.1, T1.1.2, T1.1.3
US1.2 Tasks
T1.2.1	Design schema definition API	4	Backend Dev 1	None
T1.2.2	Implement schema parsing and validation	8	Backend Dev 1	T1.2.1
T1.2.3	Add PHI field marking capability	4	Backend Dev 1	T1.2.2
T1.2.4	Implement type generation for TypeScript	6	Backend Dev 1	T1.2.2
T1.2.5	Write schema definition tests	4	Backend Dev 1	T1.2.1, T1.2.2, T1.2.3
US1.3 Tasks
T1.3.1	Design security architecture components	6	Security Engineer	None
T1.3.2	Create security flow diagrams	4	Security Engineer	T1.3.1
T1.3.3	Document component interfaces	4	Security Engineer	T1.3.1
T1.3.4	Review security architecture with team	2	Security Engineer	T1.3.1, T1.3.2, T1.3.3
T1.3.5	Create implementation roadmap	4	Security Engineer	T1.3.4
US1.4 Tasks
T1.4.1	Implement create operation	6	Backend Dev 2	T1.1.1
T1.4.2	Implement read operation	6	Backend Dev 2	T1.1.1
T1.4.3	Implement update operation	6	Backend Dev 2	T1.1.1
T1.4.4	Implement delete operation	4	Backend Dev 2	T1.1.1
T1.4.5	Add basic error handling	4	Backend Dev 2	T1.4.1, T1.4.2, T1.4.3, T1.4.4
T1.4.6	Write CRUD operation tests	6	Backend Dev 2	T1.4.1, T1.4.2, T1.4.3, T1.4.4
US1.5 Tasks
T1.5.1	Design configuration schema	2	Backend Dev 2	None
T1.5.2	Implement configuration validation	4	Backend Dev 2	T1.5.1
T1.5.3	Add environment variable support	2	Backend Dev 2	T1.5.1
T1.5.4	Document configuration options	2	Backend Dev 2	T1.5.1, T1.5.2, T1.5.3

Technical Details

Database Connection Module (US1.1)

The database connection module will serve as the foundation for all database interactions. It will:

• Use node-postgres (pg) for PostgreSQL connectivity
• Implement connection pooling for efficient resource usage
• Handle connection errors with appropriate retry logic
• Support SSL connections for secure data transmission
• Include configuration for timeout, pool size, etc.

// Sample code for database connection module
import { Pool, PoolConfig, QueryResult } from "pg";

export class DatabaseConnection {
  private pool: Pool;
  private config: PoolConfig;

  constructor(config: PoolConfig) {
    this.config = this.validateConfig(config);
    this.pool = new Pool(this.config);
    this.setupEventHandlers();
  }

  private validateConfig(config: PoolConfig): PoolConfig {
    // Validate and set defaults
    if (!config.host) throw new Error("Database host is required");
    if (!config.database) throw new Error("Database name is required");

    return {
      max: 20, // Max pool size
      idleTimeoutMillis: 30000,
      connectionTimeoutMillis: 2000,
      ...config,
      ssl: config.ssl ?? true, // Default to SSL
    };
  }

  private setupEventHandlers(): void {
    this.pool.on("error", (err) => {
      console.error("Unexpected error on idle client", err);
      // Implement error handling/logging
    });
  }

  async query<T>(text: string, params: any[] = []): Promise<QueryResult<T>> {
    try {
      return await this.pool.query<T>(text, params);
    } catch (error) {
      // Log error, may implement retry logic here
      throw error;
    }
  }

  async getClient() {
    const client = await this.pool.connect();
    return client;
  }

  async end(): Promise<void> {
    await this.pool.end();
  }
}

Schema Definition System (US1.2)

The schema definition system will allow developers to define their database schemas with PHI indicators:

• Support for all PostgreSQL data types
• Field-level PHI marking
• Validation rules for fields
• Type generation for TypeScript
• Support for indexes, constraints, and relationships

// Sample code for schema definition
export type FieldType =
  | "string"
  | "number"
  | "boolean"
  | "date"
  | "jsonb"
  | "uuid"
  | "array";

export interface FieldDefinition {
  type: FieldType;
  phi?: boolean; // Indicates if this field contains PHI
  required?: boolean;
  unique?: boolean;
  defaultValue?: any;
  references?: {
    table: string;
    column: string;
  };
  // Additional field properties
  maxLength?: number;
  minLength?: number;
  format?: string;
  properties?: Record<string, FieldDefinition>; // For jsonb fields
  items?: FieldDefinition; // For array fields
}

export interface SchemaDefinition {
  fields: Record<string, FieldDefinition>;
  indexes?: Array<{
    name: string;
    fields: string[];
    unique?: boolean;
  }>;
}

export class SchemaManager {
  private schemas: Map<string, SchemaDefinition> = new Map();

  defineSchema(name: string, definition: SchemaDefinition): void {
    this.validateSchema(definition);
    this.schemas.set(name, definition);
  }

  private validateSchema(definition: SchemaDefinition): void {
    // Validate schema structure and field types
    // Ensure required fields like primary key
    // Check for valid references
  }

  getSchema(name: string): SchemaDefinition | undefined {
    return this.schemas.get(name);
  }

  getPhiFields(name: string): string[] {
    const schema = this.getSchema(name);
    if (!schema) return [];

    return Object.entries(schema.fields)
      .filter(([_, field]) => field.phi === true)
      .map(([name]) => name);
  }

  generateTypeScript(name: string): string {
    // Generate TypeScript interface from schema
    // Include type information and validations
  }
}

Security Architecture (US1.3)

The security architecture document will outline:

• Component interaction diagrams
• Data flow with security controls
• Key management approach
• Access control framework
• Audit logging design
• Error handling and security event management

CRUD Operations (US1.4)

Basic CRUD operations will include:

• Create: Insert records with proper parameter handling
• Read: Select records with filtering
• Update: Modify records with transaction support
• Delete: Remove records with proper constraints

// Sample code for CRUD operations
export class DataAccessLayer {
  private connection: DatabaseConnection;
  private schemaManager: SchemaManager;

  constructor(connection: DatabaseConnection, schemaManager: SchemaManager) {
    this.connection = connection;
    this.schemaManager = schemaManager;
  }

  async create<T>(table: string, data: Record<string, any>): Promise<T> {
    const schema = this.schemaManager.getSchema(table);
    if (!schema) throw new Error(`Schema not found: ${table}`);

    // Validate data against schema
    this.validateData(table, data);

    // Build query
    const columns = Object.keys(data);
    const values = Object.values(data);
    const placeholders = columns.map((_, i) => `$${i + 1}`);

    const query = `
      INSERT INTO ${table} (${columns.join(", ")})
      VALUES (${placeholders.join(", ")})
      RETURNING *
    `;

    const result = await this.connection.query<T>(query, values);
    return result.rows[0];
  }

  async findOne<T>(
    table: string,
    where: Record<string, any>
  ): Promise<T | null> {
    // Implementation for findOne
  }

  async findMany<T>(table: string, where: Record<string, any>): Promise<T[]> {
    // Implementation for findMany
  }

  async update<T>(
    table: string,
    where: Record<string, any>,
    data: Record<string, any>
  ): Promise<T> {
    // Implementation for update
  }

  async delete<T>(table: string, where: Record<string, any>): Promise<T> {
    // Implementation for delete
  }

  private validateData(table: string, data: Record<string, any>): void {
    // Validate data against schema
    // Check required fields
    // Validate data types
  }
}

Configuration System (US1.5)

The configuration system will allow:

• Connection settings
• Security parameters
• Performance tuning
• Logging options
• Environment-based configuration

// Sample code for configuration
export interface DbWrapperConfig {
  connection: {
    host: string;
    port?: number;
    database: string;
    user: string;
    password: string;
    ssl?: boolean;
    maxPoolSize?: number;
  };
  security: {
    keyId?: string;
    encryptionKeyPath?: string;
    auditLogLevel?: "none" | "basic" | "detailed";
  };
  performance: {
    queryTimeout?: number;
    statementTimeout?: number;
    cacheEnabled?: boolean;
  };
}

export class ConfigurationManager {
  private config: DbWrapperConfig;

  constructor(config: Partial<DbWrapperConfig>) {
    this.config = this.buildConfig(config);
  }

  private buildConfig(config: Partial<DbWrapperConfig>): DbWrapperConfig {
    // Load from environment variables
    const envConfig = this.loadFromEnv();

    // Merge and validate
    return this.validateConfig({
      ...this.getDefaults(),
      ...envConfig,
      ...config,
    });
  }

  private loadFromEnv(): Partial<DbWrapperConfig> {
    // Load configuration from environment variables
  }

  private getDefaults(): DbWrapperConfig {
    // Return default configuration
  }

  private validateConfig(config: DbWrapperConfig): DbWrapperConfig {
    // Validate configuration
    // Check for required fields
    // Validate values
    return config;
  }

  getConfig(): DbWrapperConfig {
    return this.config;
  }
}

Sprint Schedule

Day	Activities
Day 1	Sprint Planning, Task Assignment, Project Setup
Day 2-3	US1.1 Database Connection, US1.3 Security Architecture Design
Day 4-5	US1.2 Schema Definition API, US1.4 Create Operation
Day 6-7	US1.2 Schema Validation, US1.4 Read Operation
Day 8-9	US1.5 Configuration System, US1.4 Update & Delete Operations
Day 10	Integration of Components, Testing
Day 11-12	Testing, Documentation, Bug Fixes
Day 13	Sprint Review Preparation
Day 14	Sprint Review, Retrospective

Sprint Ceremonies

Ceremony	Date	Time	Duration	Participants
Sprint Planning	Jan 1, 2025	10:00 AM	2 hours	All team members
Daily Standup	Weekdays	9:30 AM	15 minutes	All team members
Technical Design Review	Jan 3, 2025	2:00 PM	1 hour	Technical team
Security Architecture Review	Jan 7, 2025	2:00 PM	1.5 hours	Technical team, Security officer
Sprint Review	Jan 14, 2025	10:00 AM	1 hour	All team members, stakeholders
Sprint Retrospective	Jan 14, 2025	11:30 AM	45 minutes	All team members

Definition of Done

A user story is considered "Done" when:

1. Code is written and meets all acceptance criteria
2. Unit tests are written and passing (minimum 80% coverage)
3. Code follows the established coding standards
4. Code has been reviewed and approved by at least one peer
5. Documentation has been updated
6. The feature has been demonstrated to the team
7. All tasks related to the user story are complete
8. The code has been merged to the development branch

Sprint Success Criteria

This sprint will be considered successful if:

1. All planned user stories are completed according to the Definition of Done
2. The team has a working database connection with basic CRUD operations
3. The security architecture is documented and reviewed
4. The schema definition system with PHI marking is implemented
5. The foundation is set for the encryption system in Sprint 2

Dependencies

Dependency	Status	Owner	Notes
PostgreSQL database environment	Ready	DevOps	Development instance set up
Node.js development environment	Ready	DevOps	All developers have access
Security requirements document	Ready	Security Officer	HIPAA requirements mapped
Project repository	Ready	DevOps	GitHub repository set up

Risks and Mitigation

Risk	Impact	Likelihood	Mitigation
Security architecture complexity	High	Medium	Early review, iterative approach
PostgreSQL version compatibility	Medium	Low	Compatibility testing, version constraints
Schema definition API usability	Medium	Medium	Developer feedback, usability testing
Team familiarity with TypeScript	Medium	Low	Code reviews, pair programming

Post-Sprint Planning

After this sprint, the team will be ready to implement:

1. Field-level encryption for PHI (Sprint 2)
2. Access control framework (Sprint 2-3)
3. Audit logging (Sprint 3)

Team Availability

Team Member	Availability	Notes
Backend Dev 1	100%	Lead on database connection and schema definition
Backend Dev 2	100%	Lead on CRUD operations and configuration
Security Engineer	90%	10% allocated to ongoing security monitoring
Technical Lead	80%	20% allocated to planning future sprints
QA Engineer	50%	Supporting test planning and architecture review
DevOps Engineer	30%	Supporting infrastructure needs

Additional Resources

• PostgreSQL Documentation
• HIPAA Security Rule Technical Safeguards
• TypeScript Best Practices
• Node.js Security Best Practices