revite/src/components/ui/ColourSwatches.tsx

import { useRef } from 'preact/hooks';
import { Check } from '@styled-icons/feather';
import styled, { css } from 'styled-components';
import { Pencil } from '@styled-icons/bootstrap';

interface Props {
    value: string;
    onChange: (value: string) => void;
}

const presets = [
    [
        "#7B68EE",
        "#3498DB",
        "#1ABC9C",
        "#F1C40F",
        "#FF7F50",
        "#FD6671",
        "#E91E63",
        "#D468EE"
    ],
    [
        "#594CAD",
        "#206694",
        "#11806A",
        "#C27C0E",
        "#CD5B45",
        "#FF424F",
        "#AD1457",
        "#954AA8"
    ]
];

const SwatchesBase = styled.div`
    gap: 8px;
    display: flex;

    input {
        opacity: 0;
        margin-top: 44px;
        position: absolute;
        pointer-events: none;
    }
`;

const Swatch = styled.div<{ type: 'small' | 'large', colour: string }>`
    flex-shrink: 0;
    cursor: pointer;
    border-radius: 4px;
    background-color: ${ props => props.colour };

    display: grid;
    place-items: center;

    &:hover {
        border: 3px solid var(--foreground);
        transition: border ease-in-out .07s;
    }

    svg {
        color: white;
    }

    ${ props => props.type === 'small' ? css`
        width: 30px;
        height: 30px;

        svg {
            stroke-width: 2;
        }
    ` : css`
        width: 68px;
        height: 68px;
    ` }
`;

const Rows = styled.div`
    gap: 8px;
    display: flex;
    flex-direction: column;

    > div {
        gap: 8px;
        display: flex;
        flex-direction: row;
    }
`;

export function ColourSwatches({ value, onChange }: Props) {
    const ref = useRef<HTMLInputElement>();

    return (
        <SwatchesBase>
            <Swatch colour={value} type='large'
                onClick={() => ref.current.click()}>
                <Pencil size={32} />
            </Swatch>
            <input
                type="color"
                value={value}
                ref={ref}
                onChange={ev => onChange(ev.currentTarget.value)}
            />
            <Rows>
                {presets.map(row => (
                    <div>
                        { row.map(swatch => (
                            <Swatch colour={swatch} type='small'
                                onClick={() => onChange(swatch)}>
                                {swatch === value && <Check size={18} strokeWidth={2} />}
                            </Swatch>
                        )) }
                    </div>
                ))}
            </Rows>
        </SwatchesBase>
    )
}