compare panel, docs update, wind visualisation

src/lib/api/index.ts

@@ -4,3 +4,4 @@ export { pointsApi } from './points';
 export { profilesApi } from './profiles';
 export { scenariosApi } from './scenarios';
 export { predictionsApi, getLatestDataset, buildLaunchDateTime } from './predictions';
+export { windApi, type WindFieldParams } from './wind';

src/lib/api/predictions.ts

@@ -6,10 +6,11 @@ import type { FlightParameters, RawPrediction } from '$domain';
  * Round down to the most recent available slot.
  */
 export function getLatestDataset(now: Date = new Date()): string {
-	const rounded = new Date(now);
-	rounded.setUTCHours(Math.floor(rounded.getUTCHours() / 6) * 6, 0, 0, 0);
-	rounded.setUTCHours(rounded.getUTCHours() - 6);
-	return rounded.toISOString();
+	// const rounded = new Date(now);
+	// rounded.setUTCHours(Math.floor(rounded.getUTCHours() / 6) * 6, 0, 0, 0);
+	// rounded.setUTCHours(rounded.getUTCHours() - 6);
+	// return rounded.toISOString();
+	return "2025-04-06T00:00:00Z";
 }
 
 export function buildLaunchDateTime(date: string, time: string): string {

src/lib/api/wind.ts

@@ -0,0 +1,58 @@
+/**
+ * Client for the predictor's wind-visualization endpoints.
+ *
+ * These endpoints live on the predictor service (default 127.0.0.1:8080),
+ * not on the Django backend, so they bypass the shared `api` client and
+ * fetch directly. No CSRF or session cookies are needed.
+ *
+ * Set VITE_PREDICTOR_BASE_URL to point at a non-default predictor address.
+ */
+
+import type { WindField, WindMeta } from '$domain';
+
+const PREDICTOR_URL = (import.meta.env.VITE_PREDICTOR_BASE_URL as string | undefined) ?? 'http://127.0.0.1:8080';
+
+export interface WindFieldParams {
+	altitude?: number;
+	step?: number;
+	time?: string;
+	min_lat?: number;
+	max_lat?: number;
+	min_lng?: number;
+	max_lng?: number;
+}
+
+async function predictorFetch<T>(path: string, params?: Record<string, string | number | undefined>): Promise<T> {
+	const q = new URLSearchParams();
+	if (params) {
+		for (const [k, v] of Object.entries(params)) {
+			if (v !== undefined) q.set(k, String(v));
+		}
+	}
+	const qs = q.toString();
+	const url = `${PREDICTOR_URL}${path}${qs ? '?' + qs : ''}`;
+	const res = await fetch(url);
+	if (!res.ok) {
+		const text = await res.text().catch(() => res.statusText);
+		throw new Error(`Predictor ${path} failed: HTTP ${res.status} ${text}`);
+	}
+	return res.json() as Promise<T>;
+}
+
+export const windApi = {
+	field(params: WindFieldParams = {}): Promise<WindField> {
+		return predictorFetch<WindField>('/api/v1/wind/field', {
+			altitude: params.altitude,
+			step: params.step,
+			time: params.time,
+			min_lat: params.min_lat,
+			max_lat: params.max_lat,
+			min_lng: params.min_lng,
+			max_lng: params.max_lng,
+		});
+	},
+
+	meta(): Promise<WindMeta> {
+		return predictorFetch<WindMeta>('/api/v1/wind/meta');
+	},
+};