feat: file drop handling for super notes (#1990)

packages/web/src/javascripts/Controllers/FilesControllerProvider.tsx

@@ -0,0 +1,35 @@
+import { ReactNode, createContext, useContext, memo } from 'react'
+import { observer } from 'mobx-react-lite'
+import { FilesController } from '@/Controllers/FilesController'
+
+const FilesControllerContext = createContext<FilesController | undefined>(undefined)
+
+export const useFilesController = () => {
+  const value = useContext(FilesControllerContext)
+
+  if (!value) {
+    throw new Error('Component must be a child of <FilesControllerProvider />')
+  }
+
+  return value
+}
+
+type ChildrenProps = {
+  children: ReactNode
+}
+
+type ProviderProps = {
+  controller: FilesController
+} & ChildrenProps
+
+const MemoizedChildren = memo(({ children }: ChildrenProps) => <>{children}</>)
+
+const FilesControllerProvider = ({ controller, children }: ProviderProps) => {
+  return (
+    <FilesControllerContext.Provider value={controller}>
+      <MemoizedChildren children={children} />
+    </FilesControllerContext.Provider>
+  )
+}
+
+export default observer(FilesControllerProvider)