refractor code to allow more tests

src/lib/form-parse.ts

@@ -0,0 +1,61 @@
+/**
+ * Pure FormData parsing utilities extracted from proxy-hosts/actions.ts.
+ * No DB or network dependencies — safe to unit-test directly.
+ */
+
+export function parseCsv(value: FormDataEntryValue | null): string[] {
+  if (!value || typeof value !== "string") return [];
+  return value
+    .replace(/\n/g, ",")
+    .split(",")
+    .map((item) => item.trim())
+    .filter(Boolean);
+}
+
+/** Parse upstreams by newline only (URLs may contain commas in query strings). */
+export function parseUpstreams(value: FormDataEntryValue | null): string[] {
+  if (!value || typeof value !== "string") return [];
+  return value
+    .split("\n")
+    .map((item) => item.trim())
+    .filter(Boolean);
+}
+
+export function parseCheckbox(value: FormDataEntryValue | null): boolean {
+  return value === "on" || value === "true" || value === "1";
+}
+
+export function parseOptionalText(value: FormDataEntryValue | null): string | null {
+  if (!value || typeof value !== "string") return null;
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : null;
+}
+
+export function parseCertificateId(value: FormDataEntryValue | null): number | null {
+  if (!value || value === "") return null;
+  if (typeof value !== "string") return null;
+  const trimmed = value.trim();
+  if (trimmed === "" || trimmed === "null" || trimmed === "undefined") return null;
+  const num = Number(trimmed);
+  if (!Number.isFinite(num) || !Number.isInteger(num) || num <= 0) return null;
+  return num;
+}
+
+export function parseAccessListId(value: FormDataEntryValue | null): number | null {
+  if (!value || value === "") return null;
+  if (typeof value !== "string") return null;
+  const trimmed = value.trim();
+  if (trimmed === "" || trimmed === "null" || trimmed === "undefined") return null;
+  const num = Number(trimmed);
+  if (!Number.isFinite(num) || !Number.isInteger(num) || num <= 0) return null;
+  return num;
+}
+
+export function parseOptionalNumber(value: FormDataEntryValue | null): number | null {
+  if (!value || typeof value !== "string") return null;
+  const trimmed = value.trim();
+  if (trimmed === "") return null;
+  const num = Number(trimmed);
+  if (!Number.isFinite(num)) return null;
+  return num;
+}