feat: file attachments in chat — upload, preview, download

src/components/ChatPanel.tsx

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useRef, useState } from "react";
-import type { Message } from "@/lib/api";
-import { getMessages, sendMessage } from "@/lib/api";
+import type { Message, UploadedFile } from "@/lib/api";
+import { getMessages, sendMessage, uploadFile, getAttachmentUrl } from "@/lib/api";
 import { wsClient } from "@/lib/ws";
 import MentionInput from "./MentionInput";
 
@@ -17,14 +17,27 @@ interface Props {
   projectSlug?: string;
 }
 
+function formatFileSize(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+  return `${(bytes / 1024 / 1024).toFixed(1)} MB`;
+}
+
+function isImageMime(mime: string | null): boolean {
+  return !!mime && mime.startsWith("image/");
+}
+
 export default function ChatPanel({ chatId, projectSlug }: Props) {
   const [messages, setMessages] = useState<Message[]>([]);
   const [input, setInput] = useState("");
   const [sending, setSending] = useState(false);
   const [loadingOlder, setLoadingOlder] = useState(false);
   const [hasMore, setHasMore] = useState(true);
+  const [pendingFiles, setPendingFiles] = useState<UploadedFile[]>([]);
+  const [uploading, setUploading] = useState(false);
   const scrollRef = useRef<HTMLDivElement>(null);
   const bottomRef = useRef<HTMLDivElement>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
   const isInitial = useRef(true);
 
   // Load initial messages
@@ -96,13 +109,48 @@ export default function ChatPanel({ chatId, projectSlug }: Props) {
     if (el && el.scrollTop < 50 && hasMore && !loadingOlder) loadOlder();
   }, [loadOlder, hasMore, loadingOlder]);
 
+  const handleFileSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const files = e.target.files;
+    if (!files?.length) return;
+    setUploading(true);
+    try {
+      const uploaded: UploadedFile[] = [];
+      for (const file of Array.from(files)) {
+        const result = await uploadFile(file);
+        uploaded.push(result);
+      }
+      setPendingFiles((prev) => [...prev, ...uploaded]);
+    } catch (err) {
+      console.error("Upload failed:", err);
+    } finally {
+      setUploading(false);
+      if (fileInputRef.current) fileInputRef.current.value = "";
+    }
+  };
+
+  const removePendingFile = (fileId: string) => {
+    setPendingFiles((prev) => prev.filter((f) => f.file_id !== fileId));
+  };
+
   const handleSend = async () => {
-    if (!input.trim() || !chatId || sending) return;
-    const text = input.trim();
+    if ((!input.trim() && pendingFiles.length === 0) || !chatId || sending) return;
+    const text = input.trim() || (pendingFiles.length > 0 ? `📎 ${pendingFiles.map(f => f.filename).join(", ")}` : "");
+    const attachments = pendingFiles.map((f) => ({
+      file_id: f.file_id,
+      filename: f.filename,
+      mime_type: f.mime_type,
+      size: f.size,
+      storage_name: f.storage_name,
+    }));
     setInput("");
+    setPendingFiles([]);
     setSending(true);
     try {
-      const msg = await sendMessage({ chat_id: chatId, content: text });
+      const msg = await sendMessage({
+        chat_id: chatId,
+        content: text,
+        attachments: attachments.length > 0 ? attachments : undefined,
+      });
       setMessages((prev) => {
         if (prev.some((m) => m.id === msg.id)) return prev;
         return [...prev, msg];
@@ -127,6 +175,41 @@ export default function ChatPanel({ chatId, projectSlug }: Props) {
     );
   };
 
+  const renderAttachments = (attachments: Message["attachments"]) => {
+    if (!attachments?.length) return null;
+    return (
+      <div className="ml-5 mt-1 flex flex-wrap gap-2">
+        {attachments.map((att) => {
+          const url = getAttachmentUrl(att.id);
+          if (isImageMime(att.mime_type)) {
+            return (
+              <a key={att.id} href={url} target="_blank" rel="noopener noreferrer">
+                <img
+                  src={url}
+                  alt={att.filename}
+                  className="max-w-[300px] max-h-[200px] rounded border border-[var(--border)] object-cover"
+                />
+              </a>
+            );
+          }
+          return (
+            <a
+              key={att.id}
+              href={url}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="flex items-center gap-2 px-3 py-2 rounded border border-[var(--border)] bg-[var(--bg)] hover:bg-white/5 text-sm"
+            >
+              <span>📎</span>
+              <span className="truncate max-w-[200px]">{att.filename}</span>
+              <span className="text-[var(--muted)] text-xs">{formatFileSize(att.size)}</span>
+            </a>
+          );
+        })}
+      </div>
+    );
+  };
+
   const renderMessage = (msg: Message) => {
     const bgStyle =
       msg.author_type === "system"
@@ -143,6 +226,7 @@ export default function ChatPanel({ chatId, projectSlug }: Props) {
           <span>{new Date(msg.created_at).toLocaleString("ru-RU", { hour: "2-digit", minute: "2-digit" })}</span>
         </div>
         <div className="ml-5 whitespace-pre-wrap">{renderContent(msg.content)}</div>
+        {renderAttachments(msg.attachments)}
       </div>
     );
   };
@@ -166,7 +250,45 @@ export default function ChatPanel({ chatId, projectSlug }: Props) {
         )}
         <div ref={bottomRef} />
       </div>
+
+      {/* Pending files preview */}
+      {pendingFiles.length > 0 && (
+        <div className="px-6 py-2 border-t border-[var(--border)] flex flex-wrap gap-2">
+          {pendingFiles.map((f) => (
+            <div
+              key={f.file_id}
+              className="flex items-center gap-1 px-2 py-1 rounded bg-[var(--accent)]/10 text-xs"
+            >
+              <span>📎</span>
+              <span className="truncate max-w-[150px]">{f.filename}</span>
+              <span className="text-[var(--muted)]">{formatFileSize(f.size)}</span>
+              <button
+                onClick={() => removePendingFile(f.file_id)}
+                className="ml-1 text-[var(--muted)] hover:text-red-400"
+              >
+                ✕
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+
       <div className="px-6 py-3 border-t border-[var(--border)] flex gap-2 items-end">
+        <input
+          ref={fileInputRef}
+          type="file"
+          multiple
+          className="hidden"
+          onChange={handleFileSelect}
+        />
+        <button
+          onClick={() => fileInputRef.current?.click()}
+          disabled={uploading}
+          className="px-2 py-2 text-[var(--muted)] hover:text-[var(--fg)] transition-colors shrink-0 disabled:opacity-50"
+          title="Прикрепить файл"
+        >
+          {uploading ? "⏳" : "📎"}
+        </button>
         <MentionInput
           projectSlug={projectSlug || ""}
           value={input}

src/lib/api.ts

@@ -261,6 +261,7 @@ export async function sendMessage(data: {
   task_id?: string;
   content: string;
   mentions?: string[];
+  attachments?: { file_id: string; filename: string; mime_type: string | null; size: number; storage_name: string }[];
 }): Promise<Message> {
   return request("/api/v1/messages", { method: "POST", body: JSON.stringify(data) });
 }
@@ -301,6 +302,37 @@ export async function revokeToken(slug: string): Promise<void> {
   await request(`/api/v1/members/${slug}/revoke-token`, { method: "POST" });
 }
 
+// --- File Upload ---
+
+export interface UploadedFile {
+  file_id: string;
+  filename: string;
+  mime_type: string | null;
+  size: number;
+  storage_name: string;
+}
+
+export async function uploadFile(file: File): Promise<UploadedFile> {
+  const token = getToken();
+  const formData = new FormData();
+  formData.append("file", file);
+
+  const res = await fetch(`${API_BASE}/api/v1/upload`, {
+    method: "POST",
+    headers: token ? { Authorization: `Bearer ${token}` } : {},
+    body: formData,
+  });
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({ error: res.statusText }));
+    throw new Error(err.error || `HTTP ${res.status}`);
+  }
+  return res.json();
+}
+
+export function getAttachmentUrl(attachmentId: string): string {
+  return `${API_BASE}/api/v1/attachments/${attachmentId}/download`;
+}
+
 // --- Project Members ---
 
 export async function getProjectMembers(slug: string): Promise<ProjectMember[]> {