Merge branch 'main' into feat/base-service-delivery

frontend/src/api/taskLog.ts

@@ -79,3 +79,49 @@ function parseResponseBody(text: string) {
     return { error: text }
   }
 }
+
+export interface TaskLogStreamCallbacks {
+  onInit?: (lines: TaskLogLine[]) => void
+  onUpdate?: (lines: TaskLogLine[]) => void
+  onFinished?: () => void
+  onError?: (error: string) => void
+}
+
+export function createTaskLogStream(taskId: string, callbacks: TaskLogStreamCallbacks): EventSource {
+  const token = getToken()
+  const url = `/auth/api/v1/task-logs/stream?task_id=${encodeURIComponent(taskId)}&access_token=${encodeURIComponent(token || '')}`
+
+  const es = new EventSource(url)
+
+  es.onmessage = (event) => {
+    try {
+      const data = JSON.parse(event.data)
+      switch (data.type) {
+        case 'init':
+          callbacks.onInit?.(Array.isArray(data.lines) ? data.lines : [])
+          break
+        case 'update':
+          callbacks.onUpdate?.(Array.isArray(data.lines) ? data.lines : [])
+          break
+        case 'finished':
+          callbacks.onFinished?.()
+          es.close()
+          break
+        case 'error':
+          callbacks.onError?.(data.error || 'Unknown error')
+          break
+      }
+    } catch {
+      // ignore parse errors for heartbeat etc.
+    }
+  }
+
+  es.onerror = () => {
+    // EventSource will auto-reconnect, but we report connection errors
+    if (es.readyState === EventSource.CLOSED) {
+      callbacks.onError?.('Connection closed')
+    }
+  }
+
+  return es
+}