From 5f870912a35eb5fcb46339e6d5e641b1d874918d Mon Sep 17 00:00:00 2001
From: jbergner <jbergner@send.nrw>
Date: Tue, 4 Aug 2026 21:14:40 +0200
Subject: [PATCH] Neural-Brain integriert

---
 cmd/server/app.go                | 11 +++-
 internal/brainactivity/client.go | 90 ++++++++++++++++++++++++++++++++
 2 files changed, 100 insertions(+), 1 deletion(-)
 create mode 100644 internal/brainactivity/client.go

diff --git a/cmd/server/app.go b/cmd/server/app.go
index 8f3cf6f..a85413d 100644
--- a/cmd/server/app.go
+++ b/cmd/server/app.go
@@ -11,8 +11,10 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"time"
 
 	"kb-editor/internal/aifallback"
+	"kb-editor/internal/brainactivity"
 	"kb-editor/internal/staging"
 	"kb-editor/internal/store"
 )
@@ -131,8 +133,15 @@ func (a *app) handleList(w http.ResponseWriter, r *http.Request) {
 }
 
 func (a *app) handleSearch(w http.ResponseWriter, r *http.Request) {
+	startedAt := time.Now()
 	q := queryFromURL(r)
-	writeJSON(w, http.StatusOK, a.store.Search(q))
+	result := a.store.Search(q)
+	hits := make([]brainactivity.Hit, 0, len(result.Items))
+	for _, hit := range result.Items {
+		hits = append(hits, brainactivity.Hit{ID: hit.ID, Score: float64(hit.Score) / 100})
+	}
+	brainactivity.EmitSearch("knowledgebase", q.Q, hits, time.Since(startedAt))
+	writeJSON(w, http.StatusOK, result)
 }
 
 func (a *app) handleFacets(w http.ResponseWriter, r *http.Request) {
diff --git a/internal/brainactivity/client.go b/internal/brainactivity/client.go
new file mode 100644
index 0000000..fb16e0a
--- /dev/null
+++ b/internal/brainactivity/client.go
@@ -0,0 +1,90 @@
+package brainactivity
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"os"
+	"strings"
+	"sync"
+	"time"
+)
+
+type Hit struct {
+	ID    string  `json:"id"`
+	Score float64 `json:"score,omitempty"`
+}
+
+type event struct {
+	Type     string         `json:"type"`
+	Source   string         `json:"source"`
+	Query    string         `json:"query,omitempty"`
+	Message  string         `json:"message,omitempty"`
+	Hits     []Hit          `json:"hits,omitempty"`
+	Metadata map[string]any `json:"metadata,omitempty"`
+}
+
+var sender = newSender()
+
+type asyncSender struct {
+	once sync.Once
+	url  string
+	key  string
+	ch   chan event
+	http *http.Client
+}
+
+func newSender() *asyncSender {
+	return &asyncSender{ch: make(chan event, 128), http: &http.Client{Timeout: 3 * time.Second}}
+}
+
+// EmitSearch is fail-open and has no effect unless BRAIN_ACTIVITY_URL is set.
+// It never blocks the ticket-processing path and silently drops telemetry when
+// the optional visualization is unavailable or the local queue is full.
+func EmitSearch(source, query string, hits []Hit, duration time.Duration) {
+	sender.once.Do(sender.start)
+	if sender.url == "" {
+		return
+	}
+	query = strings.TrimSpace(query)
+	if len([]rune(query)) > 4000 {
+		query = string([]rune(query)[:4000])
+	}
+	e := event{
+		Type: "knowledge.search", Source: source, Query: query,
+		Message: "Wissenssuche aus " + source,
+		Hits:    hits, Metadata: map[string]any{"duration_ms": duration.Milliseconds(), "result_count": len(hits)},
+	}
+	select {
+	case sender.ch <- e:
+	default:
+	}
+}
+
+func (s *asyncSender) start() {
+	s.url = strings.TrimSpace(os.Getenv("BRAIN_ACTIVITY_URL"))
+	s.key = strings.TrimSpace(os.Getenv("BRAIN_ACTIVITY_API_KEY"))
+	if s.url == "" {
+		return
+	}
+	go func() {
+		for e := range s.ch {
+			b, err := json.Marshal(e)
+			if err != nil {
+				continue
+			}
+			req, err := http.NewRequest(http.MethodPost, s.url, bytes.NewReader(b))
+			if err != nil {
+				continue
+			}
+			req.Header.Set("Content-Type", "application/json")
+			if s.key != "" {
+				req.Header.Set("Authorization", "Bearer "+s.key)
+			}
+			resp, err := s.http.Do(req)
+			if err == nil {
+				_ = resp.Body.Close()
+			}
+		}
+	}()
+}