# Save File

### Overview

The **File Storage Component** allows saving a file to the database with its metadata, including filename, MIME type, and encoding. This component enables efficient file storage and retrieval for various applications.

### Usage

This component is useful when files need to be uploaded and stored securely in a database for further processing or retrieval.

#### Properties

| Property          | Type               | Description                                                   |
| ----------------- | ------------------ | ------------------------------------------------------------- |
| `filename`        | `string`           | The name of the file to be stored.                            |
| `mimetype`        | `string`           | The MIME type of the file.                                    |
| `content`         | `array` / `string` | The content of the file to be saved.                          |
| `contentEncoding` | `string`           | The encoding format of the content (e.g., utf8, base64, hex). |

#### Input Ports

| Port | Description                           |
| ---- | ------------------------------------- |
| `in` | Accepts the file details for storage. |

#### Output Ports

| Port   | Description                                     |
| ------ | ----------------------------------------------- |
| `file` | Emits metadata of the successfully stored file. |

#### Processing Logic

1. **Receives Input Data**:
   * Accepts `filename`, `mimetype`, `content`, and `contentEncoding`.
2. **Saves the File**:
   * Stores the file in the database.
   * Uses the specified encoding format for content.
3. **Confirms Storage**:
   * Emits metadata of the stored file, including its unique `fileId`, `filename`, and `contentType`.
   * If an error occurs (e.g., invalid content), it is logged or raised appropriately.

#### Output Data Schema

| Property      | Type     | Description                        |
| ------------- | -------- | ---------------------------------- |
| `fileId`      | `string` | The identifier of the stored file. |
| `filename`    | `string` | The name of the stored file.       |
| `contentType` | `string` | The MIME type of the stored file.  |

### Notes

* **Supports Various Encoding Formats**: Content encoding options include `utf8`, `base64`, `hex`, and more.
* **Secure and Reliable Storage**: Ensures files are stored securely in the database.
* **Ideal for File Upload and Management Workflows**: Enables seamless file handling for applications requiring document storage and retrieval.


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