feat(widget): add recurrence lookup endpoint (GET /api/widget/recurrence)

1 files changed, 49 insertions, 0 deletions

diff --git a/internal/handlers/widget_test.go b/internal/handlers/widget_test.go
index efe6858..610a55c 100644
--- a/internal/handlers/widget_test.go
+++ b/internal/handlers/widget_test.go
@@ -1,6 +1,8 @@
 package handlers
 
 import (
+	"encoding/json"
+	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"strings"
@@ -424,3 +426,50 @@ func TestTimelineItemToWidgetItem_NonRecurring_EmptyRecurringEventID(t *testing.
 		t.Errorf("expected empty RecurringEventID for a non-recurring event, got %q", wi.RecurringEventID)
 	}
 }
+
+// TestHandleWidgetRecurrence_ReturnsFormattedSchedule proves the recurrence
+// lookup endpoint: given a recurring_event_id query param, it calls the
+// calendar client's GetRecurrenceRule and returns the formatted text.
+func TestHandleWidgetRecurrence_ReturnsFormattedSchedule(t *testing.T) {
+	mock := &MockCalendarClient{RecurrenceRule: "Repeats weekly on Monday"}
+	h := &Handler{googleCalendarClient: mock}
+	req := httptest.NewRequest("GET", "/api/widget/recurrence?recurring_event_id=master-1", nil)
+	w := httptest.NewRecorder()
+	http.HandlerFunc(h.HandleWidgetRecurrence).ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+	var resp struct {
+		Recurrence string `json:"recurrence"`
+	}
+	if err := json.NewDecoder(w.Body).Decode(&resp); err != nil {
+		t.Fatalf("failed to decode response: %v", err)
+	}
+	if resp.Recurrence != "Repeats weekly on Monday" {
+		t.Errorf("recurrence = %q, want %q", resp.Recurrence, "Repeats weekly on Monday")
+	}
+}
+
+func TestHandleWidgetRecurrence_NotFound_Returns404(t *testing.T) {
+	mock := &MockCalendarClient{RecurrenceErr: fmt.Errorf("not found")}
+	h := &Handler{googleCalendarClient: mock}
+	req := httptest.NewRequest("GET", "/api/widget/recurrence?recurring_event_id=missing", nil)
+	w := httptest.NewRecorder()
+	http.HandlerFunc(h.HandleWidgetRecurrence).ServeHTTP(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected 404, got %d", w.Code)
+	}
+}
+
+func TestHandleWidgetRecurrence_MissingParam_Returns400(t *testing.T) {
+	h := &Handler{}
+	req := httptest.NewRequest("GET", "/api/widget/recurrence", nil)
+	w := httptest.NewRecorder()
+	http.HandlerFunc(h.HandleWidgetRecurrence).ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d", w.Code)
+	}
+}