feat: expand backend admin marketplace and scaling

src/common/utils/array-transform.util.ts

@@ -0,0 +1,69 @@
+import { TransformFnParams } from 'class-transformer';
+
+const parseArrayInput = (value: unknown): unknown[] | unknown | undefined => {
+  if (value === undefined || value === null) {
+    return undefined;
+  }
+
+  if (Array.isArray(value)) {
+    return value.flatMap((item) => {
+      const parsed = parseArrayInput(item);
+      if (typeof parsed === 'undefined') {
+        return [];
+      }
+      return Array.isArray(parsed) ? parsed : [parsed];
+    });
+  }
+
+  if (typeof value !== 'string') {
+    return value;
+  }
+
+  const trimmed = value.trim();
+  if (!trimmed) {
+    return undefined;
+  }
+
+  if (trimmed.startsWith('[') && trimmed.endsWith(']')) {
+    try {
+      return parseArrayInput(JSON.parse(trimmed));
+    } catch {
+      return [trimmed];
+    }
+  }
+
+  if (trimmed.includes(',')) {
+    return trimmed
+      .split(',')
+      .map((part) => part.trim())
+      .filter(Boolean);
+  }
+
+  return [trimmed];
+};
+
+export const toStringArray = ({ value }: TransformFnParams): string[] | unknown | undefined => {
+  const parsed = parseArrayInput(value);
+  if (typeof parsed === 'undefined') {
+    return undefined;
+  }
+
+  if (!Array.isArray(parsed)) {
+    return parsed;
+  }
+
+  return parsed.map((item) => String(item).trim()).filter(Boolean);
+};
+
+export const toNumberArray = ({ value }: TransformFnParams): number[] | unknown | undefined => {
+  const parsed = parseArrayInput(value);
+  if (typeof parsed === 'undefined') {
+    return undefined;
+  }
+
+  if (!Array.isArray(parsed)) {
+    return parsed;
+  }
+
+  return parsed.map((item) => Number(item));
+};