Fixed personal inquiry

src/helpers/date-jalali.ts

@@ -1,3 +1,5 @@
+import * as jMoment from "jalali-moment";
+
 /**
  * Converts an ISO date string or Date to Jalali (Persian) date and time.
  * @param input - ISO date string (e.g. 2026-02-08T13:51:20.747+00:00) or Date
@@ -12,6 +14,66 @@ export function toJalaliDateAndTime(
   return [dateStr, timeStr];
 }
 
+/**
+ * Converts a Jalali (Persian) date in any of the common shapes used across
+ * this codebase to a Gregorian `YYYY-MM-DD` string.
+ *
+ * Accepted input shapes:
+ *  - number `13770624`  (packed `YYYYMMDD`)
+ *  - string `"13770624"` / `"1377-06-24"` / `"1377/06/24"` / `"1377/6/24"`
+ *  - already-Gregorian `YYYY-MM-DD` strings are returned untouched as long as
+ *    they parse (we treat them as Gregorian only when the year is clearly
+ *    Gregorian, i.e. >= 1900). Otherwise the year is treated as Jalali.
+ *
+ * Returns `null` when the input cannot be parsed into a valid Jalali date.
+ */
+export function jalaliToGregorianDate(
+  input: string | number | null | undefined,
+): string | null {
+  if (input === null || input === undefined) return null;
+
+  const raw =
+    typeof input === "number" ? String(input) : String(input).trim();
+  if (!raw) return null;
+
+  let year = 0;
+  let month = 0;
+  let day = 0;
+
+  const separated = raw.match(/^(\d{4})[\-/](\d{1,2})[\-/](\d{1,2})$/);
+  if (separated) {
+    year = parseInt(separated[1], 10);
+    month = parseInt(separated[2], 10);
+    day = parseInt(separated[3], 10);
+  } else {
+    const digits = raw.replace(/\D/g, "");
+    if (digits.length === 8) {
+      year = parseInt(digits.slice(0, 4), 10);
+      month = parseInt(digits.slice(4, 6), 10);
+      day = parseInt(digits.slice(6, 8), 10);
+    } else {
+      return null;
+    }
+  }
+
+  if (!year || !month || !day) return null;
+
+  // If the year already looks Gregorian (>= 1900), assume the caller already
+  // sent a Gregorian date and just normalise the formatting.
+  if (year >= 1900) {
+    const mm = String(month).padStart(2, "0");
+    const dd = String(day).padStart(2, "0");
+    const m = jMoment(`${year}-${mm}-${dd}`, "YYYY-MM-DD");
+    return m.isValid() ? m.format("YYYY-MM-DD") : null;
+  }
+
+  const mm = String(month).padStart(2, "0");
+  const dd = String(day).padStart(2, "0");
+  const jm = jMoment(`${year}-${mm}-${dd}`, "jYYYY-jMM-jDD");
+  if (!jm.isValid()) return null;
+  return jm.format("YYYY-MM-DD");
+}
+
 /**
  * Converts a Date to Jalali date string (e.g. 1404/11/24).
  */