Koito/client/app/components/ActivityGrid.tsx

import { useQuery } from "@tanstack/react-query"
import { getActivity, type getActivityArgs, type ListenActivityItem } from "api/api"
import Popup from "./Popup"
import { useEffect, useState } from "react"
import { useTheme } from "~/hooks/useTheme"
import ActivityOptsSelector from "./ActivityOptsSelector"

function getPrimaryColor(): string {
    const value = getComputedStyle(document.documentElement)
        .getPropertyValue('--color-primary')
        .trim();

    const rgbMatch = value.match(/^rgb\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*\)$/);
    if (rgbMatch) {
        const [, r, g, b] = rgbMatch.map(Number);
        return (
            '#' +
            [r, g, b]
                .map((n) => n.toString(16).padStart(2, '0'))
                .join('')
        );
    }

    return value;
}

interface Props {
    step?: string 
    range?: number 
    month?: number 
    year?: number 
    artistId?: number 
    albumId?: number 
    trackId?: number
    configurable?: boolean
    autoAdjust?: boolean
}

export default function ActivityGrid({
        step = 'day',
        range = 182,
        month = 0,
        year = 0,
        artistId = 0,
        albumId = 0,
        trackId = 0,
        configurable = false,
        autoAdjust = false,
    }: Props) {

    const [color, setColor] = useState(getPrimaryColor())
    const [stepState, setStep] = useState(step)
    const [rangeState, setRange] = useState(range)
        
    const { isPending, isError, data, error } = useQuery({ 
        queryKey: [
            'listen-activity', 
            {
                step: stepState,
                range: rangeState,
                month: month,
                year: year,
                artist_id: artistId,
                album_id: albumId,
                track_id: trackId
            },
        ], 
        queryFn: ({ queryKey }) => getActivity(queryKey[1] as getActivityArgs),
    });


    const { theme } = useTheme();
    useEffect(() => {
        const raf = requestAnimationFrame(() => {
          const color = getPrimaryColor()
          setColor(color);
        });
      
        return () => cancelAnimationFrame(raf);
      }, [theme]);      

    if (isPending) { 
        return (
            <div className="w-[500px]">
                <h2>Activity</h2>
                <p>Loading...</p>
            </div>
        )
    }
    if (isError) return <p className="error">Error:{error.message}</p>

    // from https://css-tricks.com/snippets/javascript/lighten-darken-color/
    function LightenDarkenColor(hex: string, lum: number) {
        // validate hex string
        hex = String(hex).replace(/[^0-9a-f]/gi, '');
        if (hex.length < 6) {
            hex = hex[0]+hex[0]+hex[1]+hex[1]+hex[2]+hex[2];
        }
        lum = lum || 0;

        // convert to decimal and change luminosity
        var rgb = "#", c, i;
        for (i = 0; i < 3; i++) {
            c = parseInt(hex.substring(i*2,(i*2)+2), 16);
            c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
            rgb += ("00"+c).substring(c.length);
        }

        return rgb;
    }

    const getDarkenAmount = (v: number, t: number): number => {

        if (autoAdjust) {
            // automatically adjust the target value based on step
            // the smartest way to do this would be to have the api return the
            // highest value in the range. too bad im not smart
            switch (stepState) {
                case 'day':
                    t = 10
                    break;
                case 'week':
                    t = 20
                    break;
                case 'month':
                    t = 50
                    break;
                case 'year':
                    t = 100
                    break;
            }
        }

        v = Math.min(v, t)
        if (theme === "pearl") {
            // special case for the only light theme lol
            // could be generalized by pragmatically comparing the
            // lightness of the bg vs the primary but eh
            return ((t-v) / t)
        } else {
            return ((v-t) / t) * .8
        }
    }

    return (<div className="flex flex-col items-start">
        <h2>Activity</h2>
        {configurable ? (
            <ActivityOptsSelector
                rangeSetter={setRange}
                currentRange={rangeState}
                stepSetter={setStep}
                currentStep={stepState}
            />
        ) : (
            ''
        )}
        <div className="w-auto grid grid-flow-col grid-rows-7 gap-[3px] md:gap-[5px]">
            {data.map((item) => (
                <div
                    key={new Date(item.start_time).toString()}
                    className="w-[10px] sm:w-[12px] h-[10px] sm:h-[12px]"
                >
                    <Popup
                        position="top"
                        space={12}
                        extraClasses="left-2"
                        inner={`${new Date(item.start_time).toLocaleDateString()} ${item.listens} plays`}
                    >
                        <div
                            style={{
                                display: 'inline-block',
                                background:
                                    item.listens > 0
                                        ? LightenDarkenColor(color, getDarkenAmount(item.listens, 100))
                                        : 'var(--color-bg-secondary)',
                            }}
                            className={`w-[10px] sm:w-[12px] h-[10px] sm:h-[12px] rounded-[2px] md:rounded-[3px] ${item.listens > 0 ? '' : 'border-[0.5px] border-(--color-bg-tertiary)'}`}
                        ></div>
                    </Popup>
                </div>
            ))}
        </div>
    </div>
    
    );
}