# Request Approval

### Overview

The **Request Approval Component** allows human interaction within workflows by creating approval tasks that require manual decision-making. The component sends notifications to requesters and approvers and waits for an approval or rejection response.

### Usage

This component is used to introduce human decision points into an automated workflow, allowing designated approvers to review and approve or reject tasks.

#### Input Ports

| Port   | Description                                                                            |
| ------ | -------------------------------------------------------------------------------------- |
| `task` | Receives task details including title, description, requester, approver, and deadline. |

#### Output Ports

| Port       | Description                                                                      |
| ---------- | -------------------------------------------------------------------------------- |
| `created`  | Emits task details when a new approval request is created.                       |
| `approved` | Emits task details when the task is approved.                                    |
| `rejected` | Emits task details when the task is rejected.                                    |
| `due`      | Emits task details if the task reaches the decision deadline without a response. |

#### Properties

| Property      | Type     | Description                                                  |
| ------------- | -------- | ------------------------------------------------------------ |
| `title`       | `string` | Title of the approval request.                               |
| `description` | `string` | Description of the request.                                  |
| `requester`   | `string` | Email of the person requesting approval.                     |
| `approver`    | `string` | Email of the person who must approve or reject the request.  |
| `decisionBy`  | `string` | Deadline by which a decision must be made (ISO 8601 format). |

#### Processing Logic

1. **Receives Approval Request**: Accepts task details and creates an approval request.
2. **Sends Notifications**: Notifies the requester and approver via email.
3. **Waits for Response**: Listens for an approval or rejection decision.
4. **Processes Decision**:
   * If approved, sends the task details to the `approved` port.
   * If rejected, sends the task details to the `rejected` port.
   * If the deadline passes without a decision, sends the task details to the `due` port.

### Notes

* **Webhook Support**: Uses webhooks to listen for approval decisions.
* **Time-Sensitive Workflow**: Ensures decisions are processed before deadlines.
* **Workflow Control**: Useful for integrating human validation in business processes.

This component is essential for workflows requiring human approval, such as purchase approvals, compliance checks, or document validations.


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