fix: tupples

src/generateTS/factory.ts

@@ -160,6 +160,10 @@ export default function (userOptions: TSGenOptions) {
 
     if (field.multiple) {
       op = "[]";
+
+      if (field.max_instance) {
+        return ["MaxTuple<", type, ", ", field.max_instance, ">"].join("");
+      }
     }
 
     return type + op;

src/generateTS/stack/builtins.ts

@@ -4,6 +4,11 @@ export const defaultInterfaces = (
   hasJsonRte?: boolean
 ) => {
   const defaultInterfaces = [
+    `type BuildTuple<T, N extends number, R extends T[] = []> =
+    R['length'] extends N ? R : BuildTuple<T, N, [...R, T]>`,
+      `type TuplePrefixes<T extends any[]> = 
+    T extends [any, ...infer Rest] ? T | TuplePrefixes<Rest extends any[] ? Rest : []> : []`,
+      `type MaxTuple<T, N extends number> = TuplePrefixes<BuildTuple<T, N>>`,
     `export interface ${prefix}PublishDetails {
             environment: string;
             locale: string;

tests/unit/tsgen/group.test.ts

@@ -26,9 +26,9 @@ describe("group", () => {
       /** Version */
       _version: number;
       title: string;
-      multiple_group_max_limit?: {
+      multiple_group_max_limit?: MaxTuple<{
       number?: number | null;
-      }[];
+      }, 5>;
       multiple_group?: {
       single_line?: string;
       }[];

tests/unit/tsgen/isodate.test.ts

@@ -30,8 +30,8 @@ describe("builtin isodate field", () => {
       date?: string | null;
       date_required: string;
       date_multiple?: string[] | null;
-      date_multiple_maxlength?: string[] | null;
-      date_required_multiple_maxlength: string[];
+      date_multiple_maxlength?: MaxTuple<string, 5> | null;
+      date_required_multiple_maxlength: MaxTuple<string, 8>;
       }"
     `);
   });

tests/unit/tsgen/number.test.ts

@@ -28,8 +28,8 @@ describe("builtin number field", () => {
       number?: number | null;
       number_required: number;
       number_multiple?: number[] | null;
-      number_multiple_max_limit?: number[] | null;
-      number_required_multiple_max_limit: number[];
+      number_multiple_max_limit?: MaxTuple<number, 10> | null;
+      number_required_multiple_max_limit: MaxTuple<number, 3>;
       }"
     `);
   });

tests/unit/tsgen/options.test.ts

@@ -21,7 +21,7 @@ describe("all options", () => {
       single_line_textbox_not_required?: string;
       single_line_textbox_required: string;
       single_line_textbox_multiple?: string[];
-      single_line_textbox_multiple_max_limit?: string[];
+      single_line_textbox_multiple_max_limit?: MaxTuple<string, 5>;
       }"
     `);
   });