2 files changed, 78 insertions, 1 deletions
diff --git a/src/state/shell/composer.tsx b/src/state/shell/composer.tsx
new file mode 100644
index 000000000..a350bd7f3
--- /dev/null
+++ b/src/state/shell/composer.tsx
@@ -0,0 +1,74 @@
+import React from 'react'
+import {AppBskyEmbedRecord} from '@atproto/api'
+
+export interface ComposerOptsPostRef {
+  uri: string
+  cid: string
+  text: string
+  author: {
+    handle: string
+    displayName?: string
+    avatar?: string
+  }
+}
+export interface ComposerOptsQuote {
+  uri: string
+  cid: string
+  text: string
+  indexedAt: string
+  author: {
+    did: string
+    handle: string
+    displayName?: string
+    avatar?: string
+  }
+  embeds?: AppBskyEmbedRecord.ViewRecord['embeds']
+}
+export interface ComposerOpts {
+  replyTo?: ComposerOptsPostRef
+  onPost?: () => void
+  quote?: ComposerOptsQuote
+  mention?: string // handle of user to mention
+}
+
+type StateContext = ComposerOpts | undefined
+type ControlsContext = {
+  openComposer: (opts: ComposerOpts) => void
+  closeComposer: () => void
+}
+
+const stateContext = React.createContext<StateContext>(undefined)
+const controlsContext = React.createContext<ControlsContext>({
+  openComposer(_opts: ComposerOpts) {},
+  closeComposer() {},
+})
+
+export function Provider({children}: React.PropsWithChildren<{}>) {
+  const [state, setState] = React.useState<StateContext>()
+  const api = React.useMemo(
+    () => ({
+      openComposer(opts: ComposerOpts) {
+        setState(opts)
+      },
+      closeComposer() {
+        setState(undefined)
+      },
+    }),
+    [setState],
+  )
+  return (
+    <stateContext.Provider value={state}>
+      <controlsContext.Provider value={api}>
+        {children}
+      </controlsContext.Provider>
+    </stateContext.Provider>
+  )
+}
+
+export function useComposerState() {
+  return React.useContext(stateContext)
+}
+
+export function useComposerControls() {
+  return React.useContext(controlsContext)
+}
diff --git a/src/state/shell/index.tsx b/src/state/shell/index.tsx
index eb549b9f9..63c3763d1 100644
--- a/src/state/shell/index.tsx
+++ b/src/state/shell/index.tsx
@@ -5,6 +5,7 @@ import {Provider as DrawerSwipableProvider} from './drawer-swipe-disabled'
 import {Provider as MinimalModeProvider} from './minimal-mode'
 import {Provider as ColorModeProvider} from './color-mode'
 import {Provider as OnboardingProvider} from './onboarding'
+import {Provider as ComposerProvider} from './composer'
 
 export {useIsDrawerOpen, useSetDrawerOpen} from './drawer-open'
 export {
@@ -22,7 +23,9 @@ export function Provider({children}: React.PropsWithChildren<{}>) {
         <DrawerSwipableProvider>
           <MinimalModeProvider>
             <ColorModeProvider>
-              <OnboardingProvider>{children}</OnboardingProvider>
+              <OnboardingProvider>
+                <ComposerProvider>{children}</ComposerProvider>
+              </OnboardingProvider>
             </ColorModeProvider>
           </MinimalModeProvider>
         </DrawerSwipableProvider>