Creates the generic new-document form

src/lib/fields.ts

@@ -1,16 +1,22 @@
-import {
-  type DocumentData,
-  type DocumentsByType,
-  type DocumentType,
-} from "./types";
+import { type DocumentData, type DocumentType } from "./types";
 
 export type FieldType = "shortText" | "longText" | "toggle";
 
-export type ValueForFieldType<T extends FieldType> = {
+export type ValueForFieldType<F extends FieldType> = {
   shortText: string;
   longText: string;
   toggle: boolean;
-}[T];
+}[F];
+
+function defaultValue<F extends FieldType>(fieldType: F): ValueForFieldType<F> {
+  switch (fieldType) {
+    case "shortText":
+    case "longText":
+      return "" as ValueForFieldType<F>;
+    case "toggle":
+      return false as ValueForFieldType<F>;
+  }
+}
 
 export type DocumentField<D extends DocumentType, F extends FieldType> = {
   name: string;
@@ -20,6 +26,7 @@ export type DocumentField<D extends DocumentType, F extends FieldType> = {
     value: ValueForFieldType<F>,
     doc: DocumentData<D>,
   ) => DocumentData<D>;
+  setDefault: (doc: DocumentData<D>) => DocumentData<D>;
 };
 
 const simpleField = <D extends DocumentType, F extends FieldType>(
@@ -31,6 +38,7 @@ const simpleField = <D extends DocumentType, F extends FieldType>(
   fieldType,
   getter: (doc) => doc[key] as unknown as ValueForFieldType<F>,
   setter: (value, doc) => ({ ...doc, [key]: value }),
+  setDefault: (doc) => ({ ...doc, [key]: defaultValue(fieldType) }),
 });
 
 const simpleFields = <D extends DocumentType>(