# `Emoji`

One emoji: `😀`, `👍🏽`.

Use it for reactions and labels, when you want exactly one emoji. For text with emoji in it, use `Text`.

## Shape

One value, held as text in one set form, with no parts: `❤️`.

## Example

```jadpo
Emoji("😀")
```

`Emoji(raw)` checks the text, and text that isn't one breaks the `format` rule.

`text.parse(raw, as: Emoji)` reads one from text that comes from outside. Text that isn't one at all fails `malformed`, such as `❤`, `🏽` or `😀😀`.

## Good to know

- It has to be in the full form Unicode lists. A red heart needs its variation selector (`U+2764 U+FE0F`), so the bare `U+2764` is refused.
- `==` tells you whether two are the same. `<` and `list.sort_by` don't take it.

## In JSON

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

```json
"😀"
"👍🏽"
"👨‍👩‍👧"
```

## Details

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

`Emoji` 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: `😀`, `👍🏽` and `👨‍👩‍👧`.

### How it is stored

It is stored in one column named for the field, of type `text`. `👨‍👩‍👧` is stored as `'👨‍👩‍👧'`.

### How it is shown to people

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

With `locale: Locale.en_gb`:

| Value | Shown |
|---|---|
| `😀` | `😀` |
| `👍🏽` | `👍🏽` |
| `👨‍👩‍👧` | `👨‍👩‍👧` |
| `🇬🇧` | `🇬🇧` |
| `❤️` | `❤️` |

### 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>