#3 TS エラー修正

frontend/src/App.tsx

@@ -22,6 +22,17 @@ const colours = ['bg-fuchsia-500 dark:bg-fuchsia-900',
 		 'bg-yellow-500 dark:bg-yellow-900'] as const
 
 
+const ScrollToTop = () => {
+  const { pathname } = useLocation ()
+
+  useEffect (() => {
+    scrollTo (0, 0)
+  }, [pathname])
+
+  return null
+}
+
+
 export default () => {
   const bgmRef = useRef<HTMLAudioElement | null> (null)
 
@@ -35,7 +46,7 @@ export default () => {
     bgmRef.current.volume = 1
 
     const playBGM = async () => {
-      if (playing)
+      if (playing || !(bgmRef.current))
 	return
 
       try
@@ -54,7 +65,7 @@ export default () => {
     document.addEventListener ('touchstart', playBGM)
 
     const changeColour = () => {
-      setColourIndex (idx => Math.floor (Math.random () * colours.length))
+      setColourIndex (Math.floor (Math.random () * colours.length))
     }
     changeColour ()
     const colouringInterval = setInterval (changeColour, 3000)
@@ -86,7 +97,7 @@ export default () => {
 		{playing && (
 		    <a href="#" onClick={ev => {
 		      ev.preventDefault ()
-		      setMute (bgmRef.current.muted = !(mute))
+		      bgmRef.current && setMute (bgmRef.current.muted = !(mute))
 		    }}>
 		      {mute ? 'やっぱり BGM が恋しい人用' : 'BGM がうるさい人用'}
 		    </a>)}
@@ -94,12 +105,7 @@ export default () => {
 	    </header>
 	    <main className="mb-8">
 	      <Routes>
-		{() => {
-		  const { pathname } = useLocation ()
-		  useEffect (() => {
-		    scrollTo (0, 0)
-		  }, [pathname])
-	        }}
+		<ScrollToTop />
 		<Route path="/" element={<Navigate to="/threads" replace />} />
 		<Route path="/threads" element={<ThreadListPage />} />
 		<Route path="/threads/:id" element={<ThreadDetailPage />} />

frontend/src/components/threads/ThreadCanvas.tsx

@@ -3,7 +3,7 @@ import { useEffect, useRef, useState } from 'react'
 import { FaRedo, FaUndo } from 'react-icons/fa'
 import { Layer, Line, Rect, Stage, Image } from 'react-konva'
 
-import type { KonvaEventObject } from 'konva'
+import type Konva from 'konva'
 import type { ChangeEventHandler } from 'react'
 
 type ImageItem = { src: string }
@@ -23,34 +23,35 @@ type Line = {
     strokeWidth:  number }
 
 const Mode = {
-    Pen:    Symbol (),
-    Rubber: Symbol (),
-    Image:  Symbol () } as const
-type Mode = keyof Mode
+    Pen:    'Pen',
+    Rubber: 'Rubber',
+    Image:  'Image' } as const
+type Mode = (typeof Mode)[keyof typeof Mode]
 
 
 export default () => {
   const drawingRef = useRef (false)
   const fileInputRef = useRef<HTMLInputElement> (null)
-  const stageRef = useRef<Stage | null> (null)
+  const stageRef = useRef<Konva.Stage | null> (null)
 
   const [activeLayerId, setActiveLayerId] = useState<string | null> (null)
   const [colour, setColour] = useState ('#000000')
-  const [images, setImages] = useState<Record<string, window.Image[]>> ({ })
-  const [layers, setLayers] = useState<Layer[]> ([])
+  const [images, setImages] = useState<Record<string, HTMLImageElement>> ({ })
   const [layerCnt, setLayerCnt] = useState (0)
+  const [layers, setLayers] = useState<Layer[]> ([])
   const [mode, setMode] = useState<Mode> (Mode.Pen)
   const [pointSize, setPointSize] = useState (3)
-  const [stageWidth, setStageWidth] = useState (480)
   const [stageHeight, setStageHeight] = useState (480)
+  const [stageWidth, setStageWidth] = useState (480)
 
   const activeLayer = layers.find (l => l.id === activeLayerId)
 
-  const handleMouseDown = (ev: KonvaEventObject<MouseEvent>) => {
-    drawingRef.current = true
+  const handleMouseDown = (ev: Konva.KonvaEventObject<MouseEvent | TouchEvent>) => {
     const pos = ev.target.getStage ()?.getPointerPosition ()
-    if (!(pos))
+    if (!(pos) || !(activeLayer))
       return
+
+    drawingRef.current = true
     const lines: Line[] = [
 	...activeLayer.lines,
 	{ mode,
@@ -60,9 +61,10 @@ export default () => {
     updateActiveLayerLines (lines)
   }
 
-  const handleMouseMove = (ev: KonvaEventObject<MouseEvent>) => {
-    if (!(drawingRef.current))
+  const handleMouseMove = (ev: Konva.KonvaEventObject<MouseEvent | TouchEvent>) => {
+    if (!(drawingRef.current) || !(activeLayer))
       return
+
     const stage = ev.target.getStage ()
     const point = stage?.getPointerPosition ()
     if (!(point))
@@ -80,17 +82,17 @@ export default () => {
   }
 
   const handleUndo = () => {
-    if (activeLayer.lines.length === 0)
+    if (!(activeLayer) || activeLayer.lines.length === 0)
       return
     const newLines = [...activeLayer.lines]
-    const last = newLines.pop()!
+    newLines.pop()
     updateActiveLayerHistory ([...activeLayer.history, activeLayer.lines])
     updateActiveLayerFuture ([])
     updateActiveLayerLines (newLines)
   }
 
   const handleRedo = () => {
-    if (activeLayer.history.length === 0)
+    if (!(activeLayer) || activeLayer.history.length === 0)
       return
     const prev = activeLayer.history[activeLayer.history.length - 1]
     updateActiveLayerLines (prev)
@@ -181,9 +183,14 @@ export default () => {
   useEffect (() => {
     try
     {
-      const paint = JSON.parse (localStorage.getItem ('paint'))
+      const paintJSON = localStorage.getItem ('paint')
+      if (paintJSON == null)
+	throw new Error
+
+      const paint = JSON.parse (paintJSON)
       if (!(paint instanceof Array))
 	throw new Error
+
       setLayers (paint)
       setActiveLayerId (paint[0].id)
     }
@@ -254,7 +261,7 @@ export default () => {
 		       min={32}
 		       max={640}
 		       value={stageWidth}
-		       onChange={ev => setStageWidth (ev.target.value)} />
+		       onChange={ev => setStageWidth (+ev.target.value)} />
 	      </label>
 	      <label>
 		高さ：
@@ -262,7 +269,7 @@ export default () => {
 		       min={24}
 		       max={480}
 		       value={stageHeight}
-		       onChange={ev => setStageHeight (ev.target.value)} />
+		       onChange={ev => setStageHeight (+ev.target.value)} />
 	      </label>
 	    </div>
 	  </div>
@@ -363,7 +370,6 @@ export default () => {
 	  <div className="border border-black dark:border-white">
 	    <Stage ref={node => {
 		     stageRef.current = node
-		     return node
 		   }}
 		   width={stageWidth}
 		   height={stageHeight}

frontend/src/main.tsx

@@ -1,4 +1,3 @@
-import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
 import './index.css'
 import App from './App.tsx'

frontend/src/pages/threads/ThreadDetailPage.tsx

@@ -7,6 +7,8 @@ import { useParams } from 'react-router-dom'
 import ThreadCanvas from '@/components/threads/ThreadCanvas'
 import { API_BASE_URL } from '@/config'
 
+import type { Post, Thread } from '@/types'
+
 
 export default () => {
   const { id } = useParams ()

frontend/src/pages/threads/ThreadListPage.tsx

@@ -1,6 +1,5 @@
 import axios from 'axios'
 import toCamel from 'camelcase-keys'
-import cn from 'classnames'
 import { useEffect, useState } from 'react'
 import { Accordion,
 	 AccordionItem,

frontend/src/types.ts

@@ -0,0 +1,23 @@
+export type Post = {
+    id:         number
+    threadId:   number
+    postNo:     number
+    name:       string | null
+    message:    string | null
+    imageUrl:   string | null
+    held:       boolean
+    sensitive:  boolean
+    good:       number
+    bad:        number
+    createdAt:  string
+    updatedAt:  string
+    deletedAt:  string | null }
+
+export type Thread = {
+    id:           number
+    name:         string
+    description:  string | null
+    postCount:    number
+    createdAt:    string
+    updatedAt:    string
+    deletedAt:    string | null }