Split app into subpages, persist ingame time, and add 14-month dashboard calendar

cmd/server/helpers.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"errors"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+)
+
+func mustInt(v string, fallback int) int {
+	n, err := strconv.Atoi(strings.TrimSpace(v))
+	if err != nil {
+		return fallback
+	}
+	return n
+}
+
+func mustInt64(v string, fallback int64) int64 {
+	n, err := strconv.ParseInt(strings.TrimSpace(v), 10, 64)
+	if err != nil {
+		return fallback
+	}
+	return n
+}
+
+func parseInt64List(values []string) ([]int64, error) {
+	var out []int64
+	for _, v := range values {
+		id := mustInt64(v, 0)
+		if id <= 0 {
+			return nil, errors.New("invalid id")
+		}
+		out = append(out, id)
+	}
+	return out, nil
+}
+
+func placeholders(n int) string {
+	parts := make([]string, 0, n)
+	for i := 0; i < n; i++ {
+		parts = append(parts, "?")
+	}
+	return strings.Join(parts, ",")
+}
+
+func redirectWithMessage(w http.ResponseWriter, r *http.Request, path, key, val string) {
+	http.Redirect(w, r, path+"?"+key+"="+url.QueryEscape(val), http.StatusSeeOther)
+}