feat(chat): add image messages and enforce readonly sessions

app/(order)/chat/[id]/page.tsx

@@ -1,8 +1,9 @@
 "use client"
 
-import { ArrowLeft, Lock, Send } from "lucide-react"
+import { ArrowLeft, ImagePlus, Lock, Send } from "lucide-react"
+import Image from "next/image"
 import Link from "next/link"
-import { use, useState } from "react"
+import { use, useRef, useState } from "react"
 import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
 import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
@@ -17,7 +18,9 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
   const session = useChatStore((state) => state.sessions.find((item) => item.id === id))
   const messages = useChatStore((state) => state.messages.filter((item) => item.sessionId === id))
   const sendTextMessage = useChatStore((state) => state.sendTextMessage)
+  const sendImageMessage = useChatStore((state) => state.sendImageMessage)
   const [input, setInput] = useState("")
+  const imageInputRef = useRef<HTMLInputElement>(null)
   const { user } = useAuthStore()
 
   if (!session) {
@@ -77,6 +80,16 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
                   <AvatarFallback>{msg.senderName[0]}</AvatarFallback>
                 </Avatar>
                 <div className={cn("max-w-[70%]", isMine && "text-right")}>
+                  {msg.type === "image" ? (
+                    <Image
+                      src={msg.content}
+                      alt="聊天图片"
+                      width={256}
+                      height={192}
+                      unoptimized
+                      className="inline-block rounded-lg max-h-48 max-w-64 border"
+                    />
+                  ) : (
                     <p
                       className={cn(
                         "inline-block rounded-lg px-3 py-2 text-sm",
@@ -85,6 +98,7 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
                     >
                       {msg.content}
                     </p>
+                  )}
                   <p className="text-[10px] text-muted-foreground mt-1">
                     {new Date(msg.createdAt).toLocaleTimeString("zh-CN", {
                       hour: "2-digit",
@@ -100,6 +114,27 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
 
       {!session.readonly ? (
         <div className="border-t p-4">
+          <input
+            ref={imageInputRef}
+            type="file"
+            accept="image/*"
+            className="hidden"
+            onChange={(event) => {
+              const file = event.target.files?.[0]
+              if (!file) return
+              const sender = session.participants.find((participant) => participant.id === userId)
+              sendImageMessage(
+                session.id,
+                {
+                  id: userId,
+                  name: sender?.name ?? user?.nickname ?? "",
+                  avatar: sender?.avatar ?? user?.avatar ?? "",
+                },
+                URL.createObjectURL(file),
+              )
+              event.target.value = ""
+            }}
+          />
           <form
             className="flex gap-2 max-w-2xl mx-auto"
             onSubmit={(e) => {
@@ -126,6 +161,14 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
               placeholder="输入消息..."
               className="flex-1"
             />
+            <Button
+              type="button"
+              size="icon"
+              variant="outline"
+              onClick={() => imageInputRef.current?.click()}
+            >
+              <ImagePlus className="h-4 w-4" />
+            </Button>
             <Button type="submit" size="icon" disabled={!input.trim()}>
               <Send className="h-4 w-4" />
             </Button>

store/chat.ts

@@ -14,6 +14,7 @@ interface ChatState {
   messages: ChatMessage[]
   ensureOrderSession: (order: Order) => ChatSession
   sendTextMessage: (sessionId: string, sender: Sender, content: string) => void
+  sendImageMessage: (sessionId: string, sender: Sender, imageUrl: string) => void
 }
 
 function resolveAvatar(userId: string) {
@@ -74,6 +75,8 @@ export const useChatStore = create<ChatState>((set, get) => ({
   sendTextMessage: (sessionId, sender, content) => {
     const text = content.trim()
     if (!text) return
+    const session = get().sessions.find((item) => item.id === sessionId)
+    if (!session || session.readonly) return
 
     const now = new Date().toISOString()
     const message: ChatMessage = {
@@ -100,4 +103,35 @@ export const useChatStore = create<ChatState>((set, get) => ({
       ),
     }))
   },
+  sendImageMessage: (sessionId, sender, imageUrl) => {
+    const content = imageUrl.trim()
+    if (!content) return
+    const session = get().sessions.find((item) => item.id === sessionId)
+    if (!session || session.readonly) return
+
+    const now = new Date().toISOString()
+    const message: ChatMessage = {
+      id: generateId("msg"),
+      sessionId,
+      senderId: sender.id,
+      senderName: sender.name,
+      senderAvatar: sender.avatar,
+      type: "image",
+      content,
+      createdAt: now,
+    }
+
+    set((state) => ({
+      messages: [...state.messages, message],
+      sessions: state.sessions.map((item) =>
+        item.id === sessionId
+          ? {
+              ...item,
+              lastMessage: "[图片]",
+              lastMessageAt: now,
+            }
+          : item,
+      ),
+    }))
+  },
 }))