fix(server): better metadata extraction for images (#2653)

server/apps/microservices/src/utils/numbers.ts

@@ -0,0 +1,19 @@
+export function isDecimalNumber(num: number): boolean {
+  return !Number.isNaN(num) && Number.isFinite(num);
+}
+
+/**
+ * Check if `num` is a valid number and is between `start` and `end` (inclusive)
+ */
+export function isNumberInRange(num: number, start: number, end: number): boolean {
+  return isDecimalNumber(num) && num >= start && num <= end;
+}
+
+export function toNumberOrNull(input: number | string | null | undefined): number | null {
+  if (input === null || input === undefined) {
+    return null;
+  }
+
+  const num = typeof input === 'string' ? Number.parseFloat(input) : input;
+  return isDecimalNumber(num) ? num : null;
+}