Phase 8: history

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/handlers/history.go

@@ -0,0 +1,76 @@
+package handlers
+
+import (
+	"log/slog"
+	"net/http"
+
+	"qbank/internal/auth"
+	"qbank/internal/db"
+	"qbank/internal/models"
+)
+
+type HistoryHandler struct {
+	auth   *auth.Manager
+	repo   *db.Repo
+	render *Renderer
+}
+
+func NewHistoryHandler(a *auth.Manager, repo *db.Repo, r *Renderer) *HistoryHandler {
+	return &HistoryHandler{auth: a, repo: repo, render: r}
+}
+
+// TestHistoryItem pairs a test with its correct-answer count.
+type TestHistoryItem struct {
+	*models.Test
+	NCorrect int
+}
+
+func (h *HistoryHandler) Handle(w http.ResponseWriter, r *http.Request) {
+	user := auth.UserFromCtx(r.Context())
+
+	tests, err := h.repo.ListTestsForUser(user.ID)
+	if err != nil {
+		slog.Error("list tests for history", "err", err)
+		HTTPError(w, http.StatusInternalServerError)
+		return
+	}
+
+	correctCounts, err := h.repo.GetCorrectCountsForUser(user.ID)
+	if err != nil {
+		slog.Error("get correct counts", "err", err)
+		HTTPError(w, http.StatusInternalServerError)
+		return
+	}
+
+	items := make([]TestHistoryItem, 0, len(tests))
+	for _, t := range tests {
+		if !t.CompletedAt.Valid {
+			continue // skip in-progress tests
+		}
+		items = append(items, TestHistoryItem{
+			Test:     t,
+			NCorrect: correctCounts[t.ID],
+		})
+	}
+
+	totalCorrect, totalAnswered, err := h.repo.GetAggregateStats(user.ID)
+	if err != nil {
+		slog.Error("get aggregate stats", "err", err)
+		HTTPError(w, http.StatusInternalServerError)
+		return
+	}
+
+	weakSpots, err := h.repo.GetWeakSpots(user.ID)
+	if err != nil {
+		slog.Error("get weak spots", "err", err)
+		HTTPError(w, http.StatusInternalServerError)
+		return
+	}
+
+	data := BaseData(h.auth, r)
+	data["Items"] = items
+	data["TotalCorrect"] = totalCorrect
+	data["TotalAnswered"] = totalAnswered
+	data["WeakSpots"] = weakSpots
+	h.render.Render(w, http.StatusOK, "history", data)
+}