add /events and /eventnames

main.go

@@ -65,6 +65,8 @@ func newHandler(cfg Config) http.HandlerFunc {
 	mux := http.NewServeMux()
 
 	mux.Handle("POST /api/v1/events/slack", http.HandlerFunc(newHandlerPostAPIV1EventsSlack(cfg)))
+	mux.Handle("GET /api/v1/eventnames", http.HandlerFunc(newHandlerGetAPIV1EventNames(cfg)))
+	mux.Handle("GET /api/v1/events", http.HandlerFunc(newHandlerGetAPIV1Events(cfg)))
 	mux.Handle("GET /api/v1/messages", http.HandlerFunc(newHandlerGetAPIV1Messages(cfg)))
 	mux.Handle("GET /api/v1/threads", http.HandlerFunc(newHandlerGetAPIV1Threads(cfg)))
 	mux.Handle("GET /api/v1/threads/{thread}", http.HandlerFunc(newHandlerGetAPIV1ThreadsThread(cfg)))
@@ -80,6 +82,50 @@ func newHandler(cfg Config) http.HandlerFunc {
 	}
 }
 
+func newHandlerGetAPIV1EventNames(cfg Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if !basicAuth(cfg, w, r) {
+			return
+		}
+
+		since, err := parseSince(r.URL.Query().Get("since"))
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		eventNames, err := cfg.storage.EventNamesSince(r.Context(), since)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		encodeResponse(w, r, map[string]any{"eventNames": eventNames})
+	}
+}
+
+func newHandlerGetAPIV1Events(cfg Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if !basicAuth(cfg, w, r) {
+			return
+		}
+
+		since, err := parseSince(r.URL.Query().Get("since"))
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		events, err := cfg.storage.EventsSince(r.Context(), since)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		encodeResponse(w, r, map[string]any{"events": events})
+	}
+}
+
 func newHandlerGetAPIV1Messages(cfg Config) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		if !basicAuth(cfg, w, r) {

main_test.go

@@ -104,6 +104,52 @@ func TestRun(t *testing.T) {
 		}
 	})
 
+	t.Run("GET /api/v1/eventnames", func(t *testing.T) {
+		resp, err := http.Get(fmt.Sprintf("%s/api/v1/eventnames", u))
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusOK {
+			b, _ := io.ReadAll(resp.Body)
+			t.Fatalf("(%d) %s", resp.StatusCode, b)
+		}
+		var result struct {
+			EventNames []string
+		}
+		if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+			t.Fatal(err)
+		} else if result.EventNames[0] != "[Oregon-1] Wal Receive Count Alert" {
+			t.Fatal(result.EventNames)
+		} else {
+			t.Logf("%+v", result)
+		}
+	})
+
+	t.Run("GET /api/v1/events", func(t *testing.T) {
+		resp, err := http.Get(fmt.Sprintf("%s/api/v1/events", u))
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusOK {
+			b, _ := io.ReadAll(resp.Body)
+			t.Fatalf("(%d) %s", resp.StatusCode, b)
+		}
+		var result struct {
+			Events []string
+		}
+		if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+			t.Fatal(err)
+		} else if result.Events[0] != "11067" {
+			t.Fatal(result.Events)
+		} else {
+			t.Logf("%+v", result)
+		}
+	})
+
 	t.Run("GET /api/v1/threads", func(t *testing.T) {
 		resp, err := http.Get(fmt.Sprintf("%s/api/v1/threads", u))
 		if err != nil {

storage.go

@@ -25,6 +25,40 @@ func (s Storage) MessagesSince(ctx context.Context, t time.Time) ([]Message, err
 	})
 }
 
+func (s Storage) EventNamesSince(ctx context.Context, t time.Time) ([]string, error) {
+	messages, err := s.MessagesSince(ctx, t)
+	if err != nil {
+		return nil, err
+	}
+	names := map[string]struct{}{}
+	for _, m := range messages {
+		names[m.EventName] = struct{}{}
+	}
+	result := make([]string, 0, len(names))
+	for k := range names {
+		result = append(result, k)
+	}
+	sort.Strings(result)
+	return result, nil
+}
+
+func (s Storage) EventsSince(ctx context.Context, t time.Time) ([]string, error) {
+	messages, err := s.MessagesSince(ctx, t)
+	if err != nil {
+		return nil, err
+	}
+	events := map[string]struct{}{}
+	for _, m := range messages {
+		events[m.Event] = struct{}{}
+	}
+	result := make([]string, 0, len(events))
+	for k := range events {
+		result = append(result, k)
+	}
+	sort.Strings(result)
+	return result, nil
+}
+
 func (s Storage) Threads(ctx context.Context) ([]string, error) {
 	return s.ThreadsSince(ctx, time.Unix(0, 0))
 }