45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
import {
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THEME_SET,
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THEME_GENERATE,
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} from '../actions/theme';
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import { Map as ImmutableMap } from 'immutable';
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import { brightness, hue, convert } from 'chromatism';
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const initialState = ImmutableMap();
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const cssrgba = (color, a) => {
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const { r, g, b } = convert(color).rgb;
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return `rgba(${[r, g, b, a].join(',')})`;
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};
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const makeContrast = (percent, color, mode) => {
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percent = mode === 'light' ? -percent : percent;
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return brightness(percent, color);
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};
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export const generateTheme = (brandColor, mode) => {
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return ImmutableMap({
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'brand-color': brandColor,
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'accent-color': brightness(10, hue(-3, brandColor).hex).hex,
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'brand-color-faint': cssrgba(brandColor, 0.1),
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'brand-color-med': cssrgba(brandColor, 0.2),
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'highlight-text-color': makeContrast(5, brandColor, mode).hex,
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'brand-color-hicontrast': makeContrast(20, brandColor, mode).hex,
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});
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};
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export const setTheme = themeData => {
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const { 'brand-color': brandColor } = themeData.toObject();
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return ImmutableMap(generateTheme(brandColor, 'light')).merge(themeData);
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};
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export default function theme(state = initialState, action) {
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switch(action.type) {
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case THEME_GENERATE:
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return generateTheme(action.brandColor, action.mode);
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case THEME_SET:
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return setTheme(ImmutableMap(action.brandColor));
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default:
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return state;
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}
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};
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