copy files

server/util/convertFormData.ts

@@ -0,0 +1,35 @@
+import { isArray, isString, isNumber, isBoolean } from "lodash-es";
+
+export function convertFormData(values: Record<string, null | number[] | string[] | boolean[] | number | string | boolean>): FormData {
+    const formData = new FormData();
+
+    const simpleConv = (v: unknown, key: string): string => {
+        if (isString(v)) {
+            return v;
+        }
+        if (isNumber(v)) {
+            return v.toString();
+        }
+        if (isBoolean(v)) {
+            return v ? 'true' : 'false';
+        }
+        if (v === null) {
+            return '';
+        }
+        throw new TypeError(`지원하지 않는 formData Type: ${key}`);
+    }
+
+    for (const [key, value] of Object.entries(values)) {
+        if (isArray(value)) {
+            const arrKey = `${key}[]`;
+            for (const subValue of value) {
+                formData.append(arrKey, simpleConv(subValue, key));
+            }
+            continue;
+        }
+
+        formData.append(key, simpleConv(value, key));
+    }
+
+    return formData;
+}