feat(media): extract workspace package

packages/media/src/context.tsx

@@ -0,0 +1,35 @@
+import * as React from "react"
+
+import type { MediaAdapter, MediaNotice } from "./types"
+
+interface MediaContextValue {
+  adapter: MediaAdapter
+  notify?: (notice: MediaNotice) => void
+}
+
+const MediaContext = React.createContext<MediaContextValue | null>(null)
+
+export interface MediaProviderProps {
+  adapter: MediaAdapter
+  children: React.ReactNode
+  notify?: (notice: MediaNotice) => void
+}
+
+/** Supplies all persistence and transport dependencies for the media blocks. */
+export function MediaProvider({
+  adapter,
+  children,
+  notify,
+}: MediaProviderProps) {
+  const value = React.useMemo(() => ({ adapter, notify }), [adapter, notify])
+
+  return <MediaContext.Provider value={value}>{children}</MediaContext.Provider>
+}
+
+export function useMedia(): MediaContextValue {
+  const value = React.useContext(MediaContext)
+  if (!value) {
+    throw new Error("Media blocks must be rendered inside a MediaProvider.")
+  }
+  return value
+}