From 9232e8f654c53a802dd5c016bd6b5d300d3d57ab Mon Sep 17 00:00:00 2001
From: Potenz <vishnu10kumar11@gmail.com>
Date: Wed, 29 Oct 2025 21:20:53 +0530
Subject: [PATCH] feat(check-all-eligibility) - v3

---
 apps/Backend/src/routes/insuranceStatus.ts | 28 +++--------------
 apps/Backend/src/utils/dateUtils.ts        | 35 ++++++++++++++++++++++
 2 files changed, 39 insertions(+), 24 deletions(-)

diff --git a/apps/Backend/src/routes/insuranceStatus.ts b/apps/Backend/src/routes/insuranceStatus.ts
index 534758b..6b9b932 100644
--- a/apps/Backend/src/routes/insuranceStatus.ts
+++ b/apps/Backend/src/routes/insuranceStatus.ts
@@ -13,6 +13,7 @@ import {
   InsertPatient,
   insertPatientSchema,
 } from "../../../../packages/db/types/patient-types";
+import { formatDobForAgent } from "../utils/dateUtils";
 
 const router = Router();
 
@@ -550,30 +551,9 @@ router.post(
           }
 
           // Convert Date object → YYYY-MM-DD string  - req for selenium agent.
-          let dobStr: string;
-          try {
-            if (dob instanceof Date) {
-              const year = dob.getFullYear();
-              const month = String(dob.getMonth() + 1).padStart(2, "0");
-              const day = String(dob.getDate()).padStart(2, "0");
-              dobStr = `${year}-${month}-${day}`;
-            } else if (typeof dob === "string") {
-              // handle stored string already formatted
-              const dateObj = new Date(dob);
-              if (!isNaN(dateObj.getTime())) {
-                const year = dateObj.getFullYear();
-                const month = String(dateObj.getMonth() + 1).padStart(2, "0");
-                const day = String(dateObj.getDate()).padStart(2, "0");
-                dobStr = `${year}-${month}-${day}`;
-              } else {
-                // assume string is already "YYYY-MM-DD"
-                dobStr = dob;
-              }
-            } else {
-              throw new Error("Unsupported DOB format");
-            }
-          } catch (fmtErr) {
-            resultItem.error = `Invalid DOB format for ${patientLabel} — skipping ${aptLabel}`;
+          const dobStr = formatDobForAgent(dob);
+          if (!dobStr) {
+            resultItem.error = `Invalid or missing DOB for ${patientLabel} — skipping ${aptLabel}`;
             results.push(resultItem);
             continue;
           }
diff --git a/apps/Backend/src/utils/dateUtils.ts b/apps/Backend/src/utils/dateUtils.ts
index 6c81bcc..5df486f 100644
--- a/apps/Backend/src/utils/dateUtils.ts
+++ b/apps/Backend/src/utils/dateUtils.ts
@@ -24,3 +24,38 @@ export function convertOCRDate(input: string | number | null | undefined): Date
 
   return new Date(year, month, day);
 }
+
+/**
+ * Normalize a DOB value to "YYYY-MM-DD" string expected by the Python agent.
+ * - If dob is already "YYYY-MM-DD" string, returns it.
+ * - If dob is an ISO datetime string or Date, returns YYYY-MM-DD derived from UTC parts (no timezone shifts).
+ * - Returns null for invalid values.
+ */
+export function formatDobForAgent(dob: Date | string | null | undefined): string | null {
+  if (!dob) return null;
+
+  // If it's a string in exact YYYY-MM-DD format, return as-is (most ideal).
+  if (typeof dob === "string") {
+    const simpleDateMatch = /^\d{4}-\d{2}-\d{2}$/.test(dob);
+    if (simpleDateMatch) return dob;
+
+    // Otherwise try parsing as a Date/ISO string and use UTC parts
+    const parsed = new Date(dob);
+    if (isNaN(parsed.getTime())) return null;
+    const y = parsed.getUTCFullYear();
+    const m = String(parsed.getUTCMonth() + 1).padStart(2, "0");
+    const d = String(parsed.getUTCDate()).padStart(2, "0");
+    return `${y}-${m}-${d}`;
+  }
+
+  // If it's a Date object, use UTC getters to avoid timezone shifts
+  if (dob instanceof Date) {
+    if (isNaN(dob.getTime())) return null;
+    const y = dob.getUTCFullYear();
+    const m = String(dob.getUTCMonth() + 1).padStart(2, "0");
+    const d = String(dob.getUTCDate()).padStart(2, "0");
+    return `${y}-${m}-${d}`;
+  }
+
+  return null;
+}