npm package: @signature.digital/tools
Description: A TypeScript package providing utilities for managing digital contracts with modular interfaces and business context integration.
Author: Task Venture Capital GmbH
Latest version: 1.1.0

# @signature.digital/tools
A TypeScript package offering utility interfaces and classes for efficient digital contract management and business context integration with a modular design.

## Install
To install the `@signature.digital/tools` package, use your preferred package manager. For npm, run the following command:

```bash
npm install @signature.digital/tools
```

Alternatively, if you are using Yarn, you can add the package with:

```bash
yarn add @signature.digital/tools
```

Ensure your development environment supports ECMAScript Modules. In your `tsconfig.json`, you should set the `"module"` option to `"ESNext"` or a compatible module type that supports ES Modules.

## Usage

This guide details the comprehensive features of the `@signature.digital/tools` package, designed to streamline digital contract management in TypeScript applications. By using this package, you can leverage the structured capabilities of TypeScript to define, manage, and operate on digital contracts effectively.

### Introduction to the Module

The `@signature.digital/tools` package capitalizes on TypeScript's robust typing system to mold digital contract management paradigms. It encourages an interface-driven approach to designing contracts, promotes modularity, and integrates business context inherently within its structures. 

### Key Features

1. **Interface-Driven Design:**
   Utilize TypeScript interfaces to clearly delineate data structures for contracts. This results in easily maintainable, testable, and scalable digital contract solutions.

2. **Modular Architecture:**
   Divide and conquer complex contract datasets by representing them as reusable modules.

3. **Business Contextualization:**
   Seamlessly integrate business metadata into your contracts to reflect real-world applications and business scenarios.

### Usage Scenarios

Below are practical examples to help you understand and leverage the full capabilities of the `@signature.digital/tools` package.

#### 1. Designing Contract Components

Begin by defining the core components of a contract using the provided interfaces. Start with `IRole`, `IInvolvedParty`, `IParagraph`, and `IPortableContract`:

```typescript
import { IPortableContract, IRole, IInvolvedParty, IParagraph } from '@signature.digital/tools';
import { tsclass } from '@signature.digital/tools';

const createRoles = (): IRole[] => [
  {
    id: 'role-001',
    name: 'Legal Advisor',
    description: 'Advises on legal obligations and ensures compliance.'
  },
  {
    id: 'role-002',
    name: 'Stakeholder',
    description: 'Interest in the outcome of the contract.'
  }
];

const createContacts = (): tsclass.business.IContact[] => [
  {
    email: 'advisor@legalfirm.com',
    address: '123 Legal Firm St, Legal City'
  },
  {
    email: 'stakeholder@business.com',
    address: '456 Business Way, Industry City'
  }
];

const createParagraphs = (): IParagraph[] => [
  {
    uniqueId: 'para-001',
    parent: null,
    title: 'Introduction',
    content: 'Introduction to the contract, setting expectations and scope of the agreement.'
  },
  {
    uniqueId: 'para-002',
    parent: null,
    title: 'Obligations',
    content: 'Details the specific obligations and responsibilities of each involved party.'
  }
];

const createPortableContract = (): IPortableContract => {
  const roles = createRoles();
  const contacts = createContacts();
  const paragraphs = createParagraphs();

  return {
    title: 'Digital Service Agreement',
    context: 'A digital service provision framework between organizations.',
    availableRoles: roles,
    involvedParties: [
      { role: roles[0].name, contact: contacts[0] },
      { role: roles[1].name, contact: contacts[1] }
    ],
    priorContracts: [],
    paragraphs
  };
};

const contract = createPortableContract();
console.log(contract);
```

This example highlights how you can define the roles, contacts, and paragraphs that collectively represent a comprehensive digital contract model.

#### 2. Expanding Contract Details

Extend core contracts to encapsulate more details specific to your organizational needs. You can add dates, custom attributes, or any other relevant information:

```typescript
interface IExtendedPortableContract extends IPortableContract {
  startDate: Date;
  endDate: Date;
  customAttributes?: Record<string, any>;
}

const createExtendedContract = (): IExtendedPortableContract => {
  const baseContract = createPortableContract();
  return {
    ...baseContract,
    startDate: new Date('2023-01-01'),
    endDate: new Date('2024-01-01'),
    customAttributes: {
      department: 'Legal',
      projectCode: 'DSA2023'
    }
  };
};

const extendedContract = createExtendedContract();
console.log(extendedContract);
```

#### 3. Maintaining Contract History

Managing contractual history provides a strategic advantage in legal and administrative processes. Employ the `priorContracts` attribute to keep track of iterations:

```typescript
const initialContractVersion: IPortableContract = {
  title: 'Initial Service Agreement',
  context: 'Foundation agreement before the current digital service contract.',
  availableRoles: createRoles(),
  involvedParties: [
    { role: 'Legal Advisor', contact: createContacts()[0] }
  ],
  priorContracts: [],
  paragraphs: []
};

const updatedContractVersion = {
  ...initialContractVersion,
  title: 'Revised Digital Service Agreement',
  priorContracts: [initialContractVersion]
};

console.log(updatedContractVersion);
```

This functionality is crucial for firms that require detailed records of contractual changes over time.

#### 4. Integrating Business Entities

Leverage the power of `@tsclass/tsclass` to seamlessly embed business information within contracts, enhancing clarity and context:

```typescript
const businessParty = {
  role: 'Business Analyst',
  contact: {
    email: 'analyst@corporation.com',
    address: '123 Business Lane, Tech City'
  }
};

extendedContract.involvedParties.push(businessParty);
console.log(extendedContract.involvedParties);
```

This level of integration is perfect for incorporating stakeholders' information.

#### 5. Implementing Validation Logic

While the package promotes interface-based design, users must implement validation patterns to ensure contract data integrity. Below is an example of how to perform basic validations:

```typescript
function isValidContractStructure(contract: IPortableContract): boolean {
  return (
    contract.context !== '' &&
    contract.availableRoles.length > 0 &&
    contract.involvedParties.length > 0 &&
    contract.paragraphs.every(paragraph => paragraph.content !== '')
  );
}

if (!isValidContractStructure(extendedContract)) {
  throw new Error('Invalid contract structure detected!');
}
```

This sample function demonstrates a straightforward mechanism to verify that the contract structure adheres to defined rules and prevents incorrect data entries.

### Advanced Usage

Let's delve into more intricate capabilities and scenarios that `@signature.digital/tools` can facilitate:

#### Asynchronous Loading and Initialization

For scenarios where parts of contracts or their dependencies are fetched from databases or APIs, the `@signature.digital/tools` suite can interact seamlessly with asynchronous sources:

```typescript
async function fetchContractData(): Promise<IPortableContract> {
  // Simulate API call
  return new Promise((resolve) => {
    setTimeout(() => resolve(createPortableContract()), 1000);
  });
}

async function initializeAsyncContract() {
  try {
    const contractData = await fetchContractData();
    console.log('Loaded contract:', contractData);
  } catch (error) {
    console.error('Error fetching contract data:', error);
  }
}

initializeAsyncContract();
```

This approach is vital when integrating with remote contract stores or dynamically fetching contract components.

#### Dynamic Role Assignment

Business environments often require flexibility in role assignments, which can be handled dynamically within the contract configurations:

```typescript
function addDynamicRoleToContract(contract: IPortableContract, roleName: string, contactInfo: tsclass.business.IContact) {
  const role: IRole = {
    id: `role-${Math.random().toString(36).substr(2, 9)}`, // Random ID generator
    name: roleName,
    description: `Dynamic role added for ${roleName}`
  };

  contract.availableRoles.push(role);
  contract.involvedParties.push({ role: role.name, contact: contactInfo });
  console.log(`Added role: ${roleName}`);
}

addDynamicRoleToContract(contract, 'Compliance Officer', {
  email: 'compliance@business.com',
  address: 'Office 42, Compliance Street'
});
console.log(contract);
```

Dynamic role assignments are essential when handling expansive contracts with changing stakeholder roles.

#### Comprehensive Testing

You should construct extensive tests for contract components by leveraging TypeScript's compatibility with common testing frameworks. Although the test cases here are isolated, they serve as foundational templates:

```typescript
import { expect } from '@push.rocks/tapbundle';

tap.test('Contract Initial Structure', async () => {
  const contractBase = createPortableContract();
  expect(contractBase.title).toBe('Digital Service Agreement');
  expect(contractBase.paragraphs.length).toBeGreaterThan(0);
});

tap.test('Role Addition', async () => {
  const testContract = createPortableContract();
  const initialRoleCount = testContract.availableRoles.length;

  const newRole: IRole = {
    id: 'role-003',
    name: 'Tester',
    description: 'Ensures quality and compliance of the contract.'
  };

  testContract.availableRoles.push(newRole);
  expect(testContract.availableRoles.length).toBe(initialRoleCount + 1);
});

tap.start();
```

These examples demonstrate basic test cases to verify the functionality and resiliency of your contract management system.

By utilizing the `@signature.digital/tools` package, developers can construct robust, dynamic, and efficient digital contract management systems tailored to a wide array of business scenarios. The examples provided above only scratch the surface of the package's versatility and extendability, empowering developers to innovate and automate contract handling processes in TypeScript.

## License and Legal Information

This repository contains open-source code that is licensed under the MIT License. A copy of the MIT License can be found in the [license](license) file within this repository. 

**Please note:** The MIT License does not grant permission to use the trade names, trademarks, service marks, or product names of the project, except as required for reasonable and customary use in describing the origin of the work and reproducing the content of the NOTICE file.

### Trademarks

This project is owned and maintained by Task Venture Capital GmbH. The names and logos associated with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture Capital GmbH and are not included within the scope of the MIT license granted herein. Use of these trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines, and any usage must be approved in writing by Task Venture Capital GmbH.

### Company Information

Task Venture Capital GmbH  
Registered at District court Bremen HRB 35230 HB, Germany

For any legal inquiries or if you require further information, please contact us via email at hello@task.vc.

By using this repository, you acknowledge that you have read this section, agree to comply with its terms, and understand that the licensing of the code does not imply endorsement by Task Venture Capital GmbH of any derivative works.