feat(types): allow extending mapStores suffix

.gitignore

@@ -8,3 +8,4 @@ dist
 package-lock.json
 .DS_Store
 temp
+test-dts/tsconfig.tsbuildinfo

src/index.ts

@@ -15,6 +15,13 @@ export {
   DefineStoreOptions,
 } from './types'
 
-export { mapActions, mapStores, mapState, mapGetters } from './mapHelpers'
+export {
+  mapActions,
+  mapStores,
+  mapState,
+  mapGetters,
+  MapStoresCustomization,
+} from './mapHelpers'
+
 // TODO: remove in beta
 export { createStore } from './deprecated'

src/mapHelpers.ts

@@ -1,22 +1,32 @@
 import type Vue from 'vue'
 import {
-  GenericStore,
   GenericStoreDefinition,
   Method,
   StateTree,
   Store,
   StoreDefinition,
 } from './types'
 
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface MapStoresCustomization {
+  // suffix?: string
+}
+
 type StoreObject<S> = S extends StoreDefinition<
   infer Ids,
   infer State,
   infer Getters,
   infer Actions
 >
   ? {
-      [Id in `${Ids}Store`]: () => Store<
-        Id extends `${infer RealId}Store` ? RealId : string,
+      [Id in `${Ids}${'suffix' extends keyof MapStoresCustomization
+        ? MapStoresCustomization['suffix']
+        : 'Store'}`]: () => Store<
+        Id extends `${infer RealId}${'suffix' extends keyof MapStoresCustomization
+          ? MapStoresCustomization['suffix']
+          : 'Store'}`
+          ? RealId
+          : string,
         State,
         Getters,
         Actions

test-dts/customizations.test-d.ts

@@ -0,0 +1,21 @@
+import { defineStore, expectType, mapStores } from '.'
+
+declare module '../dist/src/index' {
+  export interface MapStoresCustomization {
+    // this is the only one that can be applied to work with other tests
+    suffix: 'Store'
+  }
+}
+
+const useCounter = defineStore({
+  id: 'counter',
+  state: () => ({ n: 0 }),
+})
+
+type CounterStore = ReturnType<typeof useCounter>
+
+const computedStores = mapStores(useCounter)
+
+expectType<{
+  counterStore: () => CounterStore
+}>(computedStores)

test-dts/mapHelpers.test-d.ts

@@ -1,5 +1,4 @@
-import { mapActions, mapState } from 'dist/src'
-import { defineStore, expectType, mapStores } from '.'
+import { defineStore, expectType, mapStores, mapActions, mapState } from '.'
 
 const useStore = defineStore({
   id: 'name',