下書き内容を画面を閉じても保持するように

src/composables/utils/useIndexedDbValue.ts

@@ -37,9 +37,8 @@ const useIndexedDbValue = <T extends object>(
 
   watch(
     value,
-    async () => {
+    async v => {
       if (restoring.value) return
-
       // indexedDBにはproxyされたobjectは入らないのでtoRawする
       await set(key, toRawDeep(value), store)
     },

src/lib/basic/reactive.ts

@@ -14,7 +14,11 @@ export const toRawDeep = (value: any, map = new WeakMap()) => {
     return map.get(value)
   }
 
-  if (!Array.isArray(value) && !isPlainObject(value)) {
+  if (
+    !Array.isArray(value) &&
+    !isPlainObject(value) &&
+    !(value instanceof Map)
+  ) {
     return value
   }
 
@@ -25,6 +29,8 @@ export const toRawDeep = (value: any, map = new WeakMap()) => {
     for (let i = 0; i < newValue.length; i++) {
       newValue[i] = toRawDeep(newValue[i], map)
     }
+  } else if (newValue instanceof Map) {
+    newValue.forEach((v, k) => newValue.set(k, toRawDeep(v, map)))
   } else {
     for (const k of Object.keys(newValue)) {
       newValue[k] = toRawDeep(newValue[k], map)

src/store/ui/messageInputStateStore.ts

@@ -1,9 +1,11 @@
 import { defineStore, acceptHMRUpdate } from 'pinia'
 import type { Ref } from 'vue'
-import { reactive, computed, unref } from 'vue'
+import { computed, unref, toRef } from 'vue'
 import type { AttachmentType } from '/@/lib/basic/file'
 import { convertToRefsStore } from '/@/store/utils/convertToRefsStore'
 import type { ChannelId } from '/@/types/entity-ids'
+import useIndexedDbValue, { key } from '/@/composables/utils/useIndexedDbValue'
+import { promisifyRequest } from 'idb-keyval'
 
 /**
  * 基本的に直接利用しないで`/@/composables/messageInputState`を利用する
@@ -36,24 +38,41 @@ export const createDefaultValue = () => ({ text: '', attachments: [] })
 const useMessageInputStateStorePinia = defineStore(
   'ui/messageInputStateStore',
   () => {
-    const states = reactive(
-      new Map<ChannelId | VirtualChannelId, MessageInputState>()
+    const initialValue = {
+      messageInputState: new Map<
+        ChannelId | VirtualChannelId,
+        MessageInputState
+      >()
+    }
+
+    const [state, restoring, restoringPromise] = useIndexedDbValue(
+      'store/ui/messageInputStateStore',
+      1,
+      {
+        1: async getStore => {
+          const store = getStore()
+          const setReq = store.put(initialValue, key)
+          await promisifyRequest(setReq)
+        }
+      },
+      initialValue
     )
 
+    const states = toRef(() => state.messageInputState)
     const inputChannels = computed(() =>
-      [...states].filter(([id]) => !virtualIds.has(id))
+      [...states.value].filter(([id]) => !virtualIds.has(id))
     )
     const hasInputChannel = computed(() => inputChannels.value.length > 0)
 
-    const getStore = (cId: MessageInputStateKey) => states.get(unref(cId))
+    const getStore = (cId: MessageInputStateKey) => states.value.get(unref(cId))
     const setStore = (cId: MessageInputStateKey, v: MessageInputState) => {
       // 空のときは削除、空でないときはセット
       if (v && (v.text !== '' || v.attachments.length > 0)) {
         // コピーしないと参照が変わらないから上書きされる
         // toRawしちゃうとreactiveで包めなくなるので、そうはしない
-        states.set(unref(cId), { ...v })
+        states.value.set(unref(cId), { ...v })
       } else {
-        states.delete(unref(cId))
+        states.value.delete(unref(cId))
       }
     }
 

src/views/MainPage.vue

@@ -57,7 +57,6 @@ import useMainViewLayout from './composables/useMainViewLayout'
 import useRouteWatcher from './composables/useRouteWatcher'
 import useInitialFetch from './composables/useInitialFetch'
 import { useToastStore } from '/@/store/ui/toast'
-import { useMessageInputStateStore } from '/@/store/ui/messageInputStateStore'
 import { useCommandPalette } from '/@/store/app/commandPalette'
 
 const useStyles = (
@@ -73,19 +72,6 @@ const useStyles = (
     }))
   })
 
-const useDraftConfirmer = () => {
-  const { hasInputChannel } = useMessageInputStateStore()
-  window.addEventListener('beforeunload', event => {
-    if (hasInputChannel.value) {
-      const unloadMessage =
-        'このまま終了すると下書きが削除されます。本当に終了しますか？'
-      event.preventDefault()
-      event.returnValue = unloadMessage
-      return unloadMessage
-    }
-  })
-}
-
 const useCommandPaletteShortcutKey = () => {
   const { mode, openCommandPalette, closeCommandPalette } = useCommandPalette()
 
@@ -163,8 +149,6 @@ const hideOuter = computed(
   () => isMobile.value && isNavCompletelyAppeared.value
 )
 
-useDraftConfirmer()
-
 const { routeWatcherState, triggerRouteParamChange } = useRouteWatcher()
 useInitialFetch(() => {
   connectFirebase(onClick => {