initial boilerplate

internal/handlers/items.go

@@ -0,0 +1,79 @@
+package handlers
+
+import (
+	"log/slog"
+	"net/http"
+	"strconv"
+
+	"github.com/go-chi/chi/v5"
+
+	"github.com/yourname/deflated/internal/db"
+)
+
+// ItemHandler handles routes that return price and inflation data.
+type ItemHandler struct {
+	queries *db.Queries
+}
+
+func NewItemHandler(queries *db.Queries) *ItemHandler {
+	return &ItemHandler{queries: queries}
+}
+
+// List handles GET /api/items
+func (h *ItemHandler) List(w http.ResponseWriter, r *http.Request) {
+	items, err := h.queries.ListCanonicalItems(r.Context())
+	if err != nil {
+		slog.Error("list items", "error", err)
+		writeError(w, http.StatusInternalServerError, "database error")
+		return
+	}
+	writeJSON(w, http.StatusOK, items)
+}
+
+// PriceHistory handles GET /api/items/{name}/history
+func (h *ItemHandler) PriceHistory(w http.ResponseWriter, r *http.Request) {
+	name := chi.URLParam(r, "name")
+	history, err := h.queries.GetPriceHistory(r.Context(), name)
+	if err != nil {
+		slog.Error("get price history", "error", err, "name", name)
+		writeError(w, http.StatusInternalServerError, "database error")
+		return
+	}
+	writeJSON(w, http.StatusOK, history)
+}
+
+// TopMovers handles GET /api/items/top-movers?months=12&limit=10
+func (h *ItemHandler) TopMovers(w http.ResponseWriter, r *http.Request) {
+	months, _ := strconv.Atoi(r.URL.Query().Get("months"))
+	if months <= 0 {
+		months = 12
+	}
+	limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
+	if limit <= 0 {
+		limit = 10
+	}
+
+	movers, err := h.queries.GetTopMovers(r.Context(), months, limit)
+	if err != nil {
+		slog.Error("get top movers", "error", err)
+		writeError(w, http.StatusInternalServerError, "database error")
+		return
+	}
+	writeJSON(w, http.StatusOK, movers)
+}
+
+// InflationSummary handles GET /api/inflation/summary?base_year=2009
+func (h *ItemHandler) InflationSummary(w http.ResponseWriter, r *http.Request) {
+	baseYear, _ := strconv.Atoi(r.URL.Query().Get("base_year"))
+	if baseYear <= 0 {
+		baseYear = 2009
+	}
+
+	summary, err := h.queries.GetInflationSummary(r.Context(), baseYear)
+	if err != nil {
+		slog.Error("get inflation summary", "error", err)
+		writeError(w, http.StatusInternalServerError, "database error")
+		return
+	}
+	writeJSON(w, http.StatusOK, summary)
+}