Add train headcode search

src/routes/trains/+page.ts

@@ -0,0 +1,55 @@
+import { OwlClient, ApiError, ValidationError } from '$lib/owlClient';
+import type { ApiTrainsTrainByHeadcode } from '@owlboard/owlboard-ts';
+import type { PageLoad } from './$types';
+import { error } from '@sveltejs/kit';
+
+export const load: PageLoad = async ({ url }) => {
+    const headcode = url.searchParams.get('h');
+    let dateParam = url.searchParams.get('d');
+    const toc = url.searchParams.get('t') || "";
+
+    const date: string | Date = (dateParam === "" || dateParam === null)
+        ? new Date()
+        : dateParam;
+
+    if (!headcode) {
+        throw error(400, {
+            message: 'Headcode not provided',
+            owlCode: 'INVALID_DATA'
+        });
+    }
+
+    try {
+        const response = await OwlClient.trains.getByHeadcode(headcode, date, toc);
+
+        // Shouldn't be needed to cast the type...
+        const results = (response.data || []);
+        return {
+            title: headcode.toUpperCase(),
+            results: results,
+        }
+    } catch (e: unknown) {
+        if (e instanceof ValidationError) {
+            throw error(400, {
+                message: e.message,
+                owlCode: 'VALIDATION_ERROR',
+            });
+        } else if (e instanceof ApiError) {
+            console.log(e);
+            throw error(20, {
+                message: e.message,
+                owlCode: 'API_ERROR',
+            });
+        } else if (e instanceof Error) {
+            throw error(20, {
+                message: e.message,
+                owlCode: 'GEN_ERROR',
+            })
+        } else {
+            throw error(500, {
+                message: "Unexpected error",
+                owlCode: "UNKNOWN_ERR",
+            })
+        }
+    }
+}