1 files changed, 24 insertions, 0 deletions
diff --git a/u/process/validate_identifier.ts b/u/process/validate_identifier.ts
new file mode 100644
index 0000000..32952a6
--- /dev/null
+++ b/u/process/validate_identifier.ts
@@ -0,0 +1,24 @@
+import { Either, type IEither } from "@emprespresso/pengueno";
+
+export const validateIdentifier = (token: string) => {
+  return (/^[a-zA-Z0-9_\-:. \/]+$/).test(token) && !token.includes("..");
+};
+
+// ensure {@param obj} is a Record<string, string> with stuff that won't
+// have the potential for shell injection, just to be super safe.
+type InvalidEntry<K, T> = [K, T];
+export const validateExecutionEntries = <
+  T,
+  K extends symbol | number | string = symbol | number | string,
+>(
+  obj: Record<K, T>,
+): IEither<
+  Array<InvalidEntry<K, T>>,
+  Record<string, string>
+> => {
+  const invalidEntries = <Array<InvalidEntry<K, T>>> Object.entries(obj).filter(
+    (e) => !e.every((x) => typeof x === "string" && validateIdentifier(x)),
+  );
+  if (invalidEntries.length > 0) return Either.left(invalidEntries);
+  return Either.right(<Record<string, string>> obj);
+};