WeatherTool/web/src/cities/result/GridResult.tsx

import { Component, Match, Switch } from "solid-js";

import { CityChart } from "../../components/chart/CityChart";
import { DataQuery } from "../helpers";

export const GridResult: Component<{ city: string, query: DataQuery, result: any }> = ({ city, query, result }) => {
    return (
        <div class="item">
            <h4>{ city }</h4>
            <Switch fallback={<p>{ result }</p>}>
                <Match when={query.field === "phenomena"}>
                    { result.join(", ") }
                </Match>
                <Match when={isDateNumber(result)}>
                    <CityChart city={()=>city} data={()=>result} query={()=>query}/>
                </Match>
            </Switch>
        </div>
    );
}

function isDateNumber(value: unknown): value is [string, number | null][] {
    if (!Array.isArray(value)) return false;
    for (let i = 0; i < value.length; i++) {
        let item = value[i];
        if (
            !Array.isArray(item)
            || item.length !== 2
            || typeof item[0] !== "string"
            || (typeof item[1] !== "number" && item[1] !== null)
        ) {
            return false;
        }
    }
    return true;
}