migrate to eslint v9 and flat config

.prettierignore

@@ -0,0 +1 @@
+dist

eslint.config.mjs

@@ -0,0 +1,30 @@
+
+import eslint from "@eslint/js"
+import tseslint from "typescript-eslint"
+import eslintConfigPrettier from "eslint-config-prettier"
+import globals from "globals"
+
+export default tseslint.config(
+    { ignores: ["dist/**"] },
+    {
+        extends: [eslint.configs.recommended, eslintConfigPrettier],
+        languageOptions: {
+            ecmaVersion: "latest",
+            sourceType: "module",
+            globals: globals.node,
+        },
+    },
+    {
+        files: ["**/*.ts"],
+        extends: [tseslint.configs.recommended],
+        languageOptions: {
+            ecmaVersion: "latest",
+            sourceType: "module",
+        },
+        rules: {
+            "@typescript-eslint/no-namespace": "off",
+            "@typescript-eslint/no-explicit-any": "warn",
+            "@typescript-eslint/no-empty-object-type": "warn"
+        },
+    },
+)

lib/core.ts

@@ -4,7 +4,7 @@ import {
     Create,
     Instances,
     AppRegistrationData,
-    Resize
+    Resize,
 } from "./zendesk_types/support_apps/common"
 
 export namespace Core {
@@ -51,7 +51,9 @@ export namespace Core {
 
     export namespace Events {
         export namespace app {
-            export const registered: ZendeskEvent<(data: AppRegistrationData) => void> = {
+            export const registered: ZendeskEvent<
+                (data: AppRegistrationData) => void
+            > = {
                 _path: "app.registered",
             }
             export const activated: ZendeskEvent<(data: any) => any> = {

lib/support.ts

@@ -2143,8 +2143,8 @@ export namespace Support {
                 }
                 export const deactivated: ZendeskEvent<
                     () => void | Promise<void>
-                  > = {
-                    _path: "pane.deactivated"
+                > = {
+                    _path: "pane.deactivated",
                 }
                 export const deactivatedactivated = deactivated // backwards compatibility
             }

lib/wrapper_types.ts

@@ -19,8 +19,8 @@ export type ZendeskObject<T> = {
     [K in ReadonlyKeys<NonFunctions<T>>]: T[K] extends string | number | boolean
         ? ZendeskProperty<T[K]>
         : T[K] extends Array<any>
-        ? ZendeskIndexable<T[K]>
-        : ZendeskObject<T[K]>
+          ? ZendeskIndexable<T[K]>
+          : ZendeskObject<T[K]>
 } & {
     [K in WritableKeys<NonFunctions<T>>]: T[K] extends
         | string
@@ -68,16 +68,16 @@ export type ZendeskActionPath<T> = T extends any[]
                       : never
                   : never
               : T[K] extends Function
-              ? K
-              : T[K] extends object
-              ? IsEmptyObject<PickFunctions<T[K]>> extends false
-                  ? K
-                  : never
-              : never]: T[K] extends Function
+                ? K
+                : T[K] extends object
+                  ? IsEmptyObject<PickFunctions<T[K]>> extends false
+                      ? K
+                      : never
+                  : never]: T[K] extends Function
               ? ZendeskAction<T[K]>
               : T[K] extends any[]
-              ? IndexableActionPath<T[K]>
-              : ZendeskActionPath<T[K]>
+                ? IndexableActionPath<T[K]>
+                : ZendeskActionPath<T[K]>
       }
 
 export type IndexableActionPath<T> = (
@@ -94,11 +94,8 @@ export type IsEmptyObject<Obj extends Record<PropertyKey, unknown>> = [
 
 export type Unarray<T> = T extends Array<infer U> ? U : T
 
-export type IfEquals<X, Y, A = X, B = never> = (<T>() => T extends X
-    ? 1
-    : 2) extends <T>() => T extends Y ? 1 : 2
-    ? A
-    : B
+export type IfEquals<X, Y, A = X, B = never> =
+    (<T>() => T extends X ? 1 : 2) extends <T>() => T extends Y ? 1 : 2 ? A : B
 
 export type WritableKeys<T> = {
     [P in keyof T]-?: IfEquals<
@@ -132,11 +129,11 @@ export type RelativeType<T extends keyof S, S> = T extends keyof RelatedTypes<S>
 export type RelatedTypes<T> = T extends Ticket
     ? TicketSetters
     : T extends User
-    ? UserSetters
-    : T extends Form
-    ? FormSetters
-    : T extends Comment
-    ? CommentSetters
-    : T extends Organization
-    ? OrganizationSetters
-    : never
+      ? UserSetters
+      : T extends Form
+        ? FormSetters
+        : T extends Comment
+          ? CommentSetters
+          : T extends Organization
+            ? OrganizationSetters
+            : never

lib/zendesk_types/support_apps/common.ts

@@ -120,9 +120,9 @@ export interface MetaData {
 }
 
 export interface AppRegistrationData {
-  context: Context,
-  metadata: MetaData,
-  iframe_session_timeout: number
+    context: Context
+    metadata: MetaData
+    iframe_session_timeout: number
 }
 
 // Addition Properties