# `NetworkPort`

A TCP or UDP port, from 1 to 65535.

Use it for what a service listens on. In JSON it is a plain number.

## Shape

One whole number from 1 to 65535.

## Example

```jadpo
NetworkPort(443)
```

`NetworkPort(number)` checks the number, and one outside its limits breaks `min` or `max`.

`text.parse(raw, as: NetworkPort)` reads one from text that comes from outside. Text that isn't one at all fails `malformed`, such as `0`, `65536` or `080`.

## Good to know

- `==` tells you whether two are the same, and `<` and `list.sort_by` compare and sort them.

## In JSON

A number, in a request, a response or `json.write`:

```json
22
443
8080
```

## Details

<details>
<summary>Text form, storage, how it is shown, and operations</summary>

`NetworkPort` is in the group Web and network, and has been in Jadpo since 0.1.0.

### Text form

`text.from` writes one standard text form, the same form `text.parse` reads back: `22`, `443` and `8080`.

### How it is stored

It is stored in one column named for the field, of type `integer`. `8080` is stored as `8080`.

### How it is shown to people

`text.format(value, locale:)` shows it to people in their locale.

With `locale: Locale.en_gb`:

| Value | Shown |
|---|---|
| `22` | `22` |
| `443` | `443` |
| `8080` | `8080` |
| `65535` | `65535` |

### Operations

It also takes `text.parse`, `text.from`, `text.format`, `json.read`, `json.write` and `==`. [How every standard type behaves](/docs/every-standard-type-meets-one-contract.md) says how they work.

</details>