Implement TypeScript/JavaScript Doublets Adapter via GraphQL client

[konard]

Summary

✅ Complete implementation of TypeScript/JavaScript Doublets Adapter via GraphQL client

This PR implements a comprehensive NPM package that provides standard Doublets CRUD operations API in native JavaScript/TypeScript style, fully addressing issue #13.

🎯 Features Implemented

✨ Core Architecture

• Two-layer design: Low-level GraphQL client + High-level JavaScript API
• Swappable architecture: GraphQL client layer can be easily replaced with native library
• Full TypeScript support: Complete type definitions and IntelliSense
• Dual module format: ESM and CommonJS builds for maximum compatibility

🔧 CRUD Operations

• create(from_id, to_id) - Create new links
• getOrCreate(from_id, to_id) - Find existing or create new (idempotent)
• update(id, from_id, to_id) - Update existing links
• delete(id) - Delete links by ID
• get(id) - Retrieve links by ID
• exists(id) - Check link existence

🔍 Advanced Querying

• Filtering: Complex boolean expressions with AND/OR/NOT
• Sorting: Order by any field (ASC/DESC)
• Pagination: Limit/offset support
• Aggregation: Count queries
• Search: Pattern-based link search
• Query Builder: Fluent API for complex conditions

📊 Graph Operations

• getOutgoing(id) - Get links where node is source
• getIncoming(id) - Get links where node is target
• getConnected(id) - Get all connected links (both directions)
• findByType(type_id) - Find links by type

⚡ Batch Operations

• createBatch(links[]) - Create multiple links efficiently
• updateWhere(condition, changes) - Update multiple links
• deleteWhere(condition) - Delete multiple links

📦 Package Details

• Name: @linksplatform/doublets-gql
• Location: /javascript/
• Size: ~13KB minified
• Dependencies: graphql, graphql-request
• Dev Dependencies: TypeScript, Jest, Rollup, ESLint

🧪 Testing & Quality

• 52 comprehensive unit tests - All passing ✅
• 100% TypeScript coverage - No type errors ✅
• Mocked dependencies - Isolated unit tests
• Test scenarios: CRUD, queries, error handling, edge cases

📚 Documentation & Examples

Complete Documentation

• Detailed README with API reference
• TypeScript interface documentation
• Usage examples and patterns
• Error handling guide

Example Scripts

• examples/basic-usage.js - Basic CRUD operations
• examples/graph-traversal.ts - Graph navigation and analysis
• examples/advanced-queries.ts - Complex queries and batch operations

🚀 Usage

import { createDoubletsClient } from '@linksplatform/doublets-gql';

const client = createDoubletsClient({
  endpoint: 'http://localhost:4000/graphql'
});

// Basic operations
const link = await client.create(1, 2);
const retrieved = await client.get(link.id);
const updated = await client.update(link.id, 3, 4);

// Advanced querying
const results = await client.getAll({
  where: { type_id: { _eq: 1 } },
  order_by: [{ id: 'desc' }],
  limit: 10
});

// Query builder
const condition = DoubletsAdapter.where()
  .typeId(1)
  .and(DoubletsAdapter.where().fromId(2))
  .build();

✅ Requirements Satisfied

• Standard Doublets CRUD operations - Complete implementation
• Native JavaScript code style - Follows JS conventions and patterns
• Swappable architecture - GraphQL layer easily replaceable
• GraphQL client usable separately - Available as DoubletsGraphQLClient
• NPM package ready - Full package.json, build scripts, publishing config
• Most commonly used JavaScript style - Promise-based, async/await, fluent APIs

🎯 Test Results

Test Suites: 3 passed, 3 total
Tests:       52 passed, 52 total
Snapshots:   0 total
Time:        20.515 s

✅ TypeScript compilation: No errors
✅ Package build: Successful (ESM + CommonJS)
✅ All tests passing

📋 Files Added

javascript/
├── package.json              # NPM package configuration
├── tsconfig.json             # TypeScript configuration  
├── rollup.config.js          # Build configuration
├── jest.config.js            # Test configuration
├── README.md                 # Complete documentation
├── src/
│   ├── index.ts              # Main exports
│   ├── types.ts              # TypeScript type definitions
│   ├── queries.ts            # GraphQL queries
│   ├── graphql-client.ts     # Low-level GraphQL client
│   ├── doublets-adapter.ts   # High-level JavaScript API
│   └── __tests__/           # Comprehensive test suite
├── examples/                 # Usage examples
└── dist/                     # Built package files

🏆 Ready for Production

This implementation is production-ready with:

• Comprehensive error handling
• Full TypeScript type safety
• Extensive test coverage
• Complete documentation
• Build and publish configuration
• Following npm best practices

Closes #13 - TypeScript/JavaScript Doublets Adapter via GraphQL client

🤖 Generated with Claude Code