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import { useQuery } from "@tanstack/react-query";
import React from "react";
import { useTranslation } from "react-i18next";
import "./ServiceAlerts.css";
interface ServiceAlert {
id: string;
version: number;
phase: string;
cause: string;
effect: string;
header: Record<string, string>;
description: Record<string, string>;
selectors: string[];
infoUrls: string[];
eventStartDate: string;
eventEndDate: string;
}
/** Maps an alert effect to one of the three CSS severity classes. */
function effectToSeverity(effect: string): "info" | "warning" | "error" {
if (["NoService", "SignificantDelays", "AccessibilityIssue"].includes(effect))
return "error";
if (
["ReducedService", "Detour", "ModifiedService", "StopMoved"].includes(
effect
)
)
return "warning";
return "info";
}
/** Maps an effect to an emoji icon. */
function effectToIcon(effect: string): string {
const map: Record<string, string> = {
NoService: "🚫",
ReducedService: "⚠️",
SignificantDelays: "🕐",
Detour: "↩️",
AdditionalService: "➕",
ModifiedService: "🔄",
StopMoved: "📍",
AccessibilityIssue: "♿",
};
return map[effect] ?? "ℹ️";
}
interface ServiceAlertsProps {
/** If provided, only alerts whose selectors overlap with this list are shown. */
selectorFilter?: string[];
}
const ServiceAlerts: React.FC<ServiceAlertsProps> = ({ selectorFilter }) => {
const { t, i18n } = useTranslation();
const lang = i18n.language.slice(0, 2);
const { data: alerts, isLoading } = useQuery<ServiceAlert[]>({
queryKey: ["service-alerts"],
queryFn: () => fetch("/api/alerts").then((r) => r.json()),
staleTime: 5 * 60 * 1000,
retry: false,
});
if (isLoading || !alerts) return null;
const visible = alerts.filter((alert) => {
if (!selectorFilter || selectorFilter.length === 0) return true;
return alert.selectors.some((s) => selectorFilter.includes(s));
});
if (visible.length === 0) return null;
return (
<div className="service-alerts-container stoplist-section">
<h2 className="page-subtitle">{t("stoplist.service_alerts")}</h2>
{visible.map((alert) => {
const severity = effectToSeverity(alert.effect);
const icon = effectToIcon(alert.effect);
const title =
alert.header[lang] ??
alert.header["es"] ??
Object.values(alert.header)[0] ??
"";
const body =
alert.description[lang] ??
alert.description["es"] ??
Object.values(alert.description)[0] ??
"";
return (
<div key={alert.id} className={`service-alert ${severity}`}>
<div className="alert-icon">{icon}</div>
<div className="alert-content">
<div className="alert-title">{title}</div>
{body && <div className="alert-message">{body}</div>}
{alert.infoUrls.length > 0 && (
<div className="alert-message" style={{ marginTop: "0.25rem" }}>
{alert.infoUrls.map((url, i) => (
<a
key={i}
href={url}
target="_blank"
rel="noopener noreferrer"
style={{ display: "block" }}
>
{url}
</a>
))}
</div>
)}
</div>
</div>
);
})}
</div>
);
};
export default ServiceAlerts;
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