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import { emitSSEEvent } from '@api/utils/sse-event-manager';
import type { SSEEventType } from '@shared/types/sse';
import type { MiddlewareHandler } from 'hono';
/**
* SSE Events Middleware
* Automatically emits SSE events when mutations occur
* Maps HTTP methods and routes to SSE event types
*/
export const sseEventsMiddleware: MiddlewareHandler<AppEnv> = async (
c,
next,
) => {
// Execute the route handler
await next();
// Only emit events for successful mutations (POST, PATCH, DELETE)
const method = c.req.method;
const path = c.req.path;
const status = c.res.status;
// Only process successful mutations
if (
(method === 'POST' || method === 'PATCH' || method === 'DELETE') &&
status >= 200 &&
status < 300
) {
const eventType = mapRouteToEventType(method, path);
if (eventType) {
// Extract resource ID from response or URL if available
let resourceId: string | undefined;
try {
const responseClone = c.res.clone();
const responseBody = (await responseClone.json()) as Record<
string,
unknown
>;
resourceId =
typeof responseBody?.id === 'string' ? responseBody.id : undefined;
} catch {
// Response might not be JSON or might be empty (DELETE)
// Try to extract from URL
const pathParts = path.split('/');
// Look for UUID pattern in path
resourceId = pathParts.find((part) =>
/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(
part,
),
);
}
// Get user ID from JWT payload or use 'default'
const jwtPayload = c.get('jwtPayload');
const userId = jwtPayload?.sub || 'default';
// Emit the event
emitSSEEvent(eventType, {
resourceId,
userId: String(userId),
timestamp: Date.now(),
});
}
}
};
/**
* Map HTTP method and route to SSE event type
*/
function mapRouteToEventType(
method: string,
path: string,
): SSEEventType | null {
// Normalize path to handle base paths
const normalizedPath = path.replace(/^\/v1\/super-agents/, '');
// Agent events
if (normalizedPath.startsWith('/agents')) {
if (method === 'POST') return 'agent:created';
if (method === 'PATCH') return 'agent:updated';
if (method === 'DELETE') return 'agent:deleted';
}
// Skill events
if (normalizedPath.startsWith('/skills')) {
if (method === 'POST') return 'skill:created';
if (method === 'PATCH') return 'skill:updated';
if (method === 'DELETE') return 'skill:deleted';
}
// Model events
if (
normalizedPath.match(/\/skills\/[^/]+\/models/) ||
normalizedPath.startsWith('/models')
) {
if (method === 'POST') return 'model:created';
if (method === 'PATCH') return 'model:updated';
if (method === 'DELETE') return 'model:deleted';
}
// Evaluation events
if (normalizedPath.match(/\/skills\/[^/]+\/evaluations/)) {
if (method === 'POST') return 'evaluation:created';
if (method === 'PATCH') return 'evaluation:updated';
if (method === 'DELETE') return 'evaluation:deleted';
}
// AI Provider events
if (
normalizedPath.startsWith('/ai-providers') ||
normalizedPath.startsWith('/ai-providers')
) {
if (method === 'POST') return 'ai-provider:created';
if (method === 'PATCH') return 'ai-provider:updated';
if (method === 'DELETE') return 'ai-provider:deleted';
}
// Log events (only creation)
if (normalizedPath.startsWith('/observability/logs') && method === 'POST') {
return 'log:created';
}
// Feedback events
if (normalizedPath.startsWith('/feedbacks') && method === 'POST') {
return 'feedback:created';
}
// Improved response events
if (normalizedPath.startsWith('/improved-responses') && method === 'POST') {
return 'improved-response:created';
}
// Skill optimization events
if (normalizedPath.match(/\/skills\/[^/]+\/arms/)) {
if (method === 'POST' || method === 'PATCH')
return 'skill-optimization:arm-updated';
}
if (normalizedPath.match(/\/skills\/[^/]+\/clusters/)) {
if (method === 'POST' || method === 'PATCH')
return 'skill-optimization:cluster-updated';
}
if (normalizedPath.match(/\/skills\/[^/]+\/evaluation-runs/)) {
if (method === 'POST') return 'skill-optimization:evaluation-run-created';
if (method === 'PATCH') return 'skill-optimization:evaluation-run-updated';
}
return null;
}
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