lat lon validation

backend/middleware/validation.js

@@ -1,4 +1,4 @@
-const { body, validationResult } = require("express-validator");
+const { body, query, validationResult } = require("express-validator");
 const DOMPurify = require("dompurify");
 const { JSDOM } = require("jsdom");
 
@@ -316,6 +316,35 @@ const validateFeedback = [
   handleValidationErrors,
 ];
 
+// Coordinate validation for query parameters (e.g., location search)
+const validateCoordinatesQuery = [
+  query("lat")
+    .optional()
+    .isFloat({ min: -90, max: 90 })
+    .withMessage("Latitude must be between -90 and 90"),
+  query("lng")
+    .optional()
+    .isFloat({ min: -180, max: 180 })
+    .withMessage("Longitude must be between -180 and 180"),
+  query("radius")
+    .optional()
+    .isFloat({ min: 0.1, max: 100 })
+    .withMessage("Radius must be between 0.1 and 100 miles"),
+  handleValidationErrors,
+];
+
+// Coordinate validation for body parameters (e.g., user addresses, forum posts)
+const validateCoordinatesBody = [
+  body("latitude")
+    .optional()
+    .isFloat({ min: -90, max: 90 })
+    .withMessage("Latitude must be between -90 and 90"),
+  body("longitude")
+    .optional()
+    .isFloat({ min: -180, max: 180 })
+    .withMessage("Longitude must be between -180 and 180"),
+];
+
 module.exports = {
   sanitizeInput,
   handleValidationErrors,
@@ -328,4 +357,6 @@ module.exports = {
   validateResetPassword,
   validateVerifyResetToken,
   validateFeedback,
+  validateCoordinatesQuery,
+  validateCoordinatesBody,
 };