import { Resource } from '@modelcontextprotocol/sdk/types.js';
import { nasaService } from '../services/nasa.service.js';
// Resource template pattern: nasa://rover/{rover}/latest
export function isRoverResource(uri: string): { match: boolean; rover?: string } {
const pattern = /^nasa:\/\/rover\/([a-z]+)\/latest$/;
const match = uri.match(pattern);
if (match) {
return { match: true, rover: match[1] };
}
return { match: false };
}
export function listRoverResources(): Resource[] {
const rovers = ['curiosity', 'perseverance', 'opportunity', 'spirit'];
return rovers.map(rover => ({
uri: `nasa://rover/${rover}/latest`,
name: `Latest ${rover.charAt(0).toUpperCase() + rover.slice(1)} Photos`,
description: `Most recent photos from ${rover.charAt(0).toUpperCase() + rover.slice(1)} rover`,
mimeType: 'application/json',
}));
}
export async function getRoverResourceContent(uri: string, rover: string): Promise<{ uri: string; mimeType: string; text: string }> {
try {
// Get the latest photos (last Earth date with data)
const photos = await nasaService.getMarsRoverPhotos(
rover,
1, // sol
undefined, // earthDate
undefined, // camera
1 // page
);
const content = {
rover: rover,
count: photos.photos.length,
photos: photos.photos.map((photo: any) => ({
id: photo.id,
camera: photo.camera.full_name,
sol: photo.sol,
earth_date: photo.earth_date,
img_src: photo.img_src,
})),
query_date: new Date().toISOString(),
};
return {
uri,
mimeType: 'application/json',
text: JSON.stringify(content, null, 2),
};
} catch (error) {
// Try with a recent Earth date instead
try {
const recentDate = new Date(Date.now() - 7 * 86400000).toISOString().split('T')[0];
const photos = await nasaService.getMarsRoverPhotos(
rover,
undefined, // sol
recentDate, // earthDate
undefined, // camera
1 // page
);
const content = {
rover: rover,
count: photos.photos.length,
photos: photos.photos.map((photo: any) => ({
id: photo.id,
camera: photo.camera.full_name,
sol: photo.sol,
earth_date: photo.earth_date,
img_src: photo.img_src,
})),
query_date: new Date().toISOString(),
note: `Using photos from ${recentDate}`,
};
return {
uri,
mimeType: 'application/json',
text: JSON.stringify(content, null, 2),
};
} catch (fallbackError) {
return {
uri,
mimeType: 'application/json',
text: JSON.stringify({ error: `Failed to fetch photos for ${rover}: ${fallbackError}` }, null, 2),
};
}
}
}
