Don't rerender entire editor for user list

also fixes bug where you are the only person mentionable

web/components/editor.tsx

@@ -18,7 +18,6 @@ import { uploadImage } from 'web/lib/firebase/storage'
 import { useMutation } from 'react-query'
 import { FileUploadButton } from './file-upload-button'
 import { linkClass } from './site-link'
-import { useUsers } from 'web/hooks/use-users'
 import { mentionSuggestion } from './editor/mention-suggestion'
 import { DisplayMention } from './editor/mention'
 import Iframe from 'common/util/tiptap-iframe'
@@ -68,8 +67,6 @@ export function useTextEditor(props: {
 }) {
   const { placeholder, max, defaultValue = '', disabled, simple } = props
 
-  const users = useUsers()
-
   const editorClass = clsx(
     proseClass,
     !simple && 'min-h-[6em]',
@@ -78,32 +75,27 @@ export function useTextEditor(props: {
     '[&_.ProseMirror-selectednode]:outline-dotted [&_*]:outline-indigo-300' // selected img, emebeds
   )
 
-  const editor = useEditor(
-    {
-      editorProps: { attributes: { class: editorClass } },
-      extensions: [
-        StarterKit.configure({
-          heading: simple ? false : { levels: [1, 2, 3] },
-          horizontalRule: simple ? false : {},
-        }),
-        Placeholder.configure({
-          placeholder,
-          emptyEditorClass:
-            'before:content-[attr(data-placeholder)] before:text-slate-500 before:float-left before:h-0 cursor-text',
-        }),
-        CharacterCount.configure({ limit: max }),
-        simple ? DisplayImage : Image,
-        DisplayLink,
-        DisplayMention.configure({
-          suggestion: mentionSuggestion(users),
-        }),
-        Iframe,
-        TiptapTweet,
-      ],
-      content: defaultValue,
-    },
-    [!users.length] // passed as useEffect dependency. (re-render editor when users load, to update mention menu)
-  )
+  const editor = useEditor({
+    editorProps: { attributes: { class: editorClass } },
+    extensions: [
+      StarterKit.configure({
+        heading: simple ? false : { levels: [1, 2, 3] },
+        horizontalRule: simple ? false : {},
+      }),
+      Placeholder.configure({
+        placeholder,
+        emptyEditorClass:
+          'before:content-[attr(data-placeholder)] before:text-slate-500 before:float-left before:h-0 cursor-text',
+      }),
+      CharacterCount.configure({ limit: max }),
+      simple ? DisplayImage : Image,
+      DisplayLink,
+      DisplayMention.configure({ suggestion: mentionSuggestion }),
+      Iframe,
+      TiptapTweet,
+    ],
+    content: defaultValue,
+  })
 
   const upload = useUploadMutation(editor)
 

web/components/editor/mention-suggestion.ts

@@ -1,21 +1,24 @@
 import type { MentionOptions } from '@tiptap/extension-mention'
 import { ReactRenderer } from '@tiptap/react'
-import { User } from 'common/user'
 import { searchInAny } from 'common/util/parse'
-import { orderBy } from 'lodash'
+import { memoize, orderBy } from 'lodash'
 import tippy from 'tippy.js'
+import { getUsers } from 'web/lib/firebase/users'
 import { MentionList } from './mention-list'
 
 type Suggestion = MentionOptions['suggestion']
 
+const users = memoize(getUsers)
+users() // prefetch
+
 const beginsWith = (text: string, query: string) =>
   text.toLocaleLowerCase().startsWith(query.toLocaleLowerCase())
 
 // copied from https://tiptap.dev/api/nodes/mention#usage
-export const mentionSuggestion = (users: User[]): Suggestion => ({
-  items: ({ query }) =>
+export const mentionSuggestion: Suggestion = {
+  items: async ({ query }) =>
     orderBy(
-      users.filter((u) => searchInAny(query, u.username, u.name)),
+      (await users()).filter((u) => searchInAny(query, u.username, u.name)),
       [
         (u) => [u.name, u.username].some((s) => beginsWith(s, query)),
         'followerCountCached',
@@ -38,7 +41,7 @@ export const mentionSuggestion = (users: User[]): Suggestion => ({
         popup = tippy('body', {
           getReferenceClientRect: props.clientRect as any,
           appendTo: () => document.body,
-          content: component.element,
+          content: component?.element,
           showOnCreate: true,
           interactive: true,
           trigger: 'manual',
@@ -46,27 +49,27 @@ export const mentionSuggestion = (users: User[]): Suggestion => ({
         })
       },
       onUpdate(props) {
-        component.updateProps(props)
+        component?.updateProps(props)
 
         if (!props.clientRect) {
           return
         }
 
-        popup[0].setProps({
+        popup?.[0].setProps({
           getReferenceClientRect: props.clientRect as any,
         })
       },
       onKeyDown(props) {
         if (props.event.key === 'Escape') {
-          popup[0].hide()
+          popup?.[0].hide()
           return true
         }
-        return (component.ref as any)?.onKeyDown(props)
+        return (component?.ref as any)?.onKeyDown(props)
       },
       onExit() {
-        popup[0].destroy()
-        component.destroy()
+        popup?.[0].destroy()
+        component?.destroy()
       },
     }
   },
-})
+}