feat: v1 API + frontend migration

api/v1/utils.go

@@ -0,0 +1,84 @@
+package v1
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+)
+
+// writeJSON writes a JSON response (deprecated - used by tests only)
+func writeJSON(w http.ResponseWriter, status int, data any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	if err := json.NewEncoder(w).Encode(data); err != nil {
+		writeJSONError(w, http.StatusInternalServerError, "Failed to encode response")
+	}
+}
+
+// writeJSONError writes a JSON error response (deprecated - used by tests only)
+func writeJSONError(w http.ResponseWriter, status int, message string) {
+	writeJSON(w, status, ErrorResponse{
+		Code:    status,
+		Message: message,
+	})
+}
+
+// QueryParams represents parsed query parameters (deprecated - used by tests only)
+type QueryParams struct {
+	Page   int64
+	Limit  int64
+	Search *string
+}
+
+// parseQueryParams parses URL query parameters (deprecated - used by tests only)
+func parseQueryParams(query url.Values, defaultLimit int64) QueryParams {
+	page, _ := strconv.ParseInt(query.Get("page"), 10, 64)
+	if page == 0 {
+		page = 1
+	}
+	limit, _ := strconv.ParseInt(query.Get("limit"), 10, 64)
+	if limit == 0 {
+		limit = defaultLimit
+	}
+	search := query.Get("search")
+	var searchPtr *string
+	if search != "" {
+		searchPtr = ptrOf("%" + search + "%")
+	}
+	return QueryParams{
+		Page:   page,
+		Limit:  limit,
+		Search: searchPtr,
+	}
+}
+
+// ptrOf returns a pointer to the given value
+func ptrOf[T any](v T) *T {
+	return &v
+}
+
+// parseTime parses a string to time.Time
+func parseTime(s string) time.Time {
+	t, _ := time.Parse(time.RFC3339, s)
+	if t.IsZero() {
+		t, _ = time.Parse("2006-01-02T15:04:05", s)
+	}
+	return t
+}
+
+// parseTimePtr parses an interface{} (from SQL) to *time.Time
+func parseTimePtr(v interface{}) *time.Time {
+	if v == nil {
+		return nil
+	}
+	if s, ok := v.(string); ok {
+		t := parseTime(s)
+		if t.IsZero() {
+			return nil
+		}
+		return &t
+	}
+	return nil
+}