CSV Uploads

__tests__/components/drops/create/utils/CreateDropActionsRow.test.tsx

@@ -23,7 +23,10 @@ describe('CreateDropActionsRow', () => {
     const button = screen.getByRole('button', { name: /select audio file/i });
     const input = button.querySelector('input') as HTMLInputElement;
     fireEvent.change(input, { target: { files } });
-    expect(toast).toHaveBeenCalledWith({ message: 'You can only upload up to 4 files at a time', type: 'error' });
+    expect(toast).toHaveBeenCalledWith({
+      message: `You can only upload up to ${MAX_DROP_UPLOAD_FILES} files at a time`,
+      type: 'error'
+    });
     expect(setFiles).not.toHaveBeenCalled();
   });
 
@@ -38,6 +41,13 @@ describe('CreateDropActionsRow', () => {
     expect(toast).not.toHaveBeenCalled();
   });
 
+  it('does not expose csv in the legacy input picker', () => {
+    renderComponent({ canAddPart: false, isStormMode: false, setFiles: jest.fn(), breakIntoStorm: jest.fn() });
+    const button = screen.getByRole('button', { name: /select audio file/i });
+    const input = button.querySelector('input') as HTMLInputElement;
+    expect(input).toHaveAttribute('accept', 'image/*,video/*,audio/*');
+  });
+
   it('renders break into storm button when allowed and handles click', () => {
     const handler = jest.fn();
     renderComponent({ canAddPart: true, isStormMode: false, setFiles: jest.fn(), breakIntoStorm: handler });

__tests__/components/drops/view/item/content/media/DropListItemContentMedia.test.tsx

@@ -6,6 +6,7 @@ jest.mock('@/components/drops/view/item/content/media/DropListItemContentMediaIm
 jest.mock('@/components/drops/view/item/content/media/DropListItemContentMediaVideo', () => ({ __esModule: true, default: () => <div data-testid="video" /> }));
 jest.mock('@/components/drops/view/item/content/media/DropListItemContentMediaAudio', () => ({ __esModule: true, default: () => <div data-testid="audio" /> }));
 jest.mock('@/components/drops/view/item/content/media/DropListItemContentMediaGLB', () => ({ __esModule: true, default: () => <div data-testid="glb" /> }));
+jest.mock('@/components/drops/view/item/content/media/DropMediaAttachmentCard', () => ({ __esModule: true, default: () => <div data-testid="attachment" /> }));
 jest.mock('next/dynamic', () => (importer: any) => () => <div data-testid="glb" />);
 
 describe('DropListItemContentMedia', () => {
@@ -29,6 +30,11 @@ describe('DropListItemContentMedia', () => {
     expect(screen.getByTestId('glb')).toBeInTheDocument();
   });
 
+  it('renders attachment card for csv', () => {
+    render(<DropListItemContentMedia media_mime_type="text/csv" media_url="file.csv" />);
+    expect(screen.getByTestId('attachment')).toBeInTheDocument();
+  });
+
   it('renders empty fragment for unknown type', () => {
     const { container } = render(<DropListItemContentMedia media_mime_type="text/plain" media_url="file.txt" />);
     expect(container.firstChild).toBeNull();

__tests__/components/drops/view/item/content/media/MediaDisplay.test.tsx

@@ -10,6 +10,9 @@ jest.mock('@/components/drops/view/item/content/media/MediaDisplayVideo', () =>
 jest.mock('@/components/drops/view/item/content/media/MediaDisplayAudio', () => (props: any) => (
   <div data-testid="audio" data-src={props.src} data-controls={String(props.showControls)} />
 ));
+jest.mock('@/components/drops/view/item/content/media/DropMediaAttachmentCard', () => (props: any) => (
+  <div data-testid="attachment" data-src={props.src} data-mime={props.mimeType} />
+));
 
 jest.mock('next/dynamic', () => (importFn: any) => importFn().then ? () => <div data-testid="glb" /> : () => <div data-testid="glb" />);
 
@@ -41,6 +44,13 @@ describe('MediaDisplay', () => {
     expect(screen.getByTestId('glb')).toBeInTheDocument();
   });
 
+  it('renders attachment card for csv', () => {
+    render(<MediaDisplay media_mime_type="text/csv" media_url="file.csv" />);
+    const node = screen.getByTestId('attachment');
+    expect(node).toHaveAttribute('data-src', 'file.csv');
+    expect(node).toHaveAttribute('data-mime', 'text/csv');
+  });
+
   it('renders empty fragment for unknown', () => {
     const { container } = render(<MediaDisplay media_mime_type="text/plain" media_url="file.txt" />);
     expect(container).toBeEmptyDOMElement();

__tests__/components/waves/CreateDropActions.test.tsx

@@ -269,6 +269,25 @@ describe("CreateDropActions", () => {
     expect(fileInput).toHaveAttribute("multiple");
   });
 
+  it("accepts csv uploads in chat mode only", () => {
+    const { rerender } = render(
+      <CreateDropActions {...defaultProps} isDropMode={false} />
+    );
+
+    let fileInputs = screen.getAllByLabelText("Upload a file");
+    let fileInput = fileInputs[0]?.querySelector('input[type="file"]');
+    expect(fileInput).toHaveAttribute(
+      "accept",
+      "image/*,video/*,audio/*,.csv,text/csv"
+    );
+
+    rerender(<CreateDropActions {...defaultProps} isDropMode={true} />);
+
+    fileInputs = screen.getAllByLabelText("Upload a file");
+    fileInput = fileInputs[0]?.querySelector('input[type="file"]');
+    expect(fileInput).toHaveAttribute("accept", "image/*,video/*,audio/*");
+  });
+
   it("passes correct props to StormButton", () => {
     render(
       <CreateDropActions

__tests__/services/uploads/multipartUploadCore.test.ts

@@ -0,0 +1,19 @@
+import { getContentType } from "@/services/uploads/multipartUploadCore";
+
+describe("getContentType", () => {
+  it("normalizes csv files to text/csv", () => {
+    const file = new File(["a,b"], "data.csv", {
+      type: "application/vnd.ms-excel",
+    });
+
+    expect(getContentType(file)).toBe("text/csv");
+  });
+
+  it("keeps non-csv mime types unchanged", () => {
+    const file = new File(["x"], "image.png", {
+      type: "image/png",
+    });
+
+    expect(getContentType(file)).toBe("image/png");
+  });
+});

components/drops/create/utils/file/CreateDropSelectedFileIcon.tsx

@@ -4,6 +4,7 @@ enum FILE_TYPES {
   IMAGE = "IMAGE",
   VIDEO = "VIDEO",
   AUDIO = "AUDIO",
+  CSV = "CSV",
 }
 
 export default function CreateDropSelectedFileIcon({
@@ -24,6 +25,9 @@ export default function CreateDropSelectedFileIcon({
     if (file.type.includes("audio")) {
       return FILE_TYPES.AUDIO;
     }
+    if (file.type === "text/csv" || file.name.toLowerCase().endsWith(".csv")) {
+      return FILE_TYPES.CSV;
+    }
     return null;
   };
 
@@ -88,6 +92,24 @@ export default function CreateDropSelectedFileIcon({
           ></path>
         </svg>
       );
+    case FILE_TYPES.CSV:
+      return (
+        <svg
+          className="tw-flex-shrink-0 tw-h-5 tw-w-5 tw-text-iron-400"
+          xmlns="http://www.w3.org/2000/svg"
+          fill="none"
+          aria-hidden="true"
+          viewBox="0 0 24 24"
+          strokeWidth="1.5"
+          stroke="currentColor"
+        >
+          <path
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            d="M19.5 14.25v-8.25a2.25 2.25 0 0 0-2.25-2.25H8.25L4.5 7.5v10.5a2.25 2.25 0 0 0 2.25 2.25h6.75m0-9h6m-6 3h6m-6 3h3"
+          ></path>
+        </svg>
+      );
     default:
       assertUnreachable(fileType);
       return null;

components/drops/create/utils/file/CreateDropSelectedFilePreview.tsx

@@ -3,6 +3,7 @@ enum FILE_TYPES {
   IMAGE = "IMAGE",
   VIDEO = "VIDEO",
   AUDIO = "AUDIO",
+  CSV = "CSV",
   UNKNOWN = "UNKNOWN",
 }
 
@@ -21,6 +22,9 @@ export default function CreateDropSelectedFilePreview({
     if (file.type.includes("audio")) {
       return FILE_TYPES.AUDIO;
     }
+    if (file.type === "text/csv" || file.name.toLowerCase().endsWith(".csv")) {
+      return FILE_TYPES.CSV;
+    }
     return FILE_TYPES.UNKNOWN;
   };
 
@@ -46,6 +50,18 @@ export default function CreateDropSelectedFilePreview({
         Your browser does not support the audio tag.
       </audio>
     ),
+    [FILE_TYPES.CSV]: (
+      <div className="tw-flex tw-h-full tw-min-h-32 tw-w-full tw-items-center tw-justify-center tw-rounded-xl tw-border tw-border-iron-700 tw-bg-iron-900/60 tw-p-6 tw-text-center">
+        <div>
+          <div className="tw-text-sm tw-font-semibold tw-text-iron-100">
+            CSV attachment
+          </div>
+          <div className="tw-mt-1 tw-break-all tw-text-xs tw-text-iron-400">
+            {file.name}
+          </div>
+        </div>
+      </div>
+    ),
     [FILE_TYPES.UNKNOWN]: <></>,
   };
 

components/drops/view/item/content/media/DropListItemContentMedia.tsx

@@ -10,13 +10,15 @@ import DropListItemContentMediaImage from "./DropListItemContentMediaImage";
 import DropListItemContentMediaVideo from "./DropListItemContentMediaVideo";
 import SandboxedExternalIframe from "@/components/common/SandboxedExternalIframe";
 import InteractiveIcon from "@/components/drops/media/InteractiveIcon";
+import DropMediaAttachmentCard from "./DropMediaAttachmentCard";
 
 enum MediaType {
   IMAGE = "IMAGE",
   VIDEO = "VIDEO",
   AUDIO = "AUDIO",
   GLB = "GLB",
   HTML = "HTML",
+  CSV = "CSV",
   UNKNOWN = "UNKNOWN",
 }
 
@@ -73,6 +75,9 @@ export default function DropListItemContentMedia({
     if (media_mime_type === "text/html") {
       return MediaType.HTML;
     }
+    if (media_mime_type === "text/csv") {
+      return MediaType.CSV;
+    }
     return MediaType.UNKNOWN;
   };
 
@@ -127,6 +132,13 @@ export default function DropListItemContentMedia({
           className="tw-h-full tw-w-full"
         />
       );
+    case MediaType.CSV:
+      return (
+        <DropMediaAttachmentCard
+          src={media_url}
+          mimeType={media_mime_type}
+        />
+      );
     case MediaType.UNKNOWN:
       return <></>;
     default:

components/drops/view/item/content/media/DropMediaAttachmentCard.tsx

@@ -0,0 +1,58 @@
+"use client";
+
+import Download from "@/components/download/Download";
+import { getFileInfoFromUrl } from "@/helpers/file.helpers";
+
+export default function DropMediaAttachmentCard({
+  src,
+  mimeType,
+}: {
+  readonly src: string;
+  readonly mimeType: string;
+}) {
+  const fileInfo = getFileInfoFromUrl(src);
+  const extension =
+    fileInfo?.extension ?? (mimeType === "text/csv" ? "csv" : "");
+  const name = fileInfo?.name ?? "attachment";
+  const displayName = extension ? `${name}.${extension}` : name;
+  const label = mimeType === "text/csv" ? "CSV attachment" : "Attachment";
+
+  return (
+    <div className="tw-flex tw-h-full tw-w-full tw-items-center tw-justify-between tw-gap-4 tw-rounded-2xl tw-border tw-border-iron-700 tw-bg-iron-900/70 tw-p-5">
+      <div className="tw-flex tw-min-w-0 tw-items-center tw-gap-4">
+        <div className="tw-flex tw-h-12 tw-w-12 tw-flex-shrink-0 tw-items-center tw-justify-center tw-rounded-2xl tw-bg-iron-800 tw-text-iron-200">
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            fill="none"
+            viewBox="0 0 24 24"
+            strokeWidth="1.5"
+            stroke="currentColor"
+            className="tw-h-6 tw-w-6"
+            aria-hidden="true"
+          >
+            <path
+              strokeLinecap="round"
+              strokeLinejoin="round"
+              d="M19.5 14.25v-8.25a2.25 2.25 0 0 0-2.25-2.25H8.25L4.5 7.5v10.5a2.25 2.25 0 0 0 2.25 2.25h6.75m0-9h6m-6 3h6m-6 3h3"
+            />
+          </svg>
+        </div>
+        <div className="tw-min-w-0">
+          <div className="tw-text-xs tw-font-medium tw-uppercase tw-tracking-[0.16em] tw-text-iron-400">
+            {label}
+          </div>
+          <div className="tw-mt-1 tw-truncate tw-text-sm tw-font-semibold tw-text-iron-100">
+            {displayName}
+          </div>
+        </div>
+      </div>
+      <Download
+        href={src}
+        name={name}
+        extension={extension}
+        variant="text"
+        alwaysShowText={true}
+      />
+    </div>
+  );
+}

components/drops/view/item/content/media/MediaDisplay.tsx

@@ -4,6 +4,7 @@ import dynamic from "next/dynamic";
 import SandboxedExternalIframe from "@/components/common/SandboxedExternalIframe";
 import { ImageScale } from "@/helpers/image.helpers";
 import MediaDisplayAudio from "./MediaDisplayAudio";
+import DropMediaAttachmentCard from "./DropMediaAttachmentCard";
 import MediaDisplayImage from "./MediaDisplayImage";
 import MediaDisplayVideo from "./MediaDisplayVideo";
 
@@ -13,6 +14,7 @@ enum MediaType {
   AUDIO = "AUDIO",
   GLB = "GLB",
   HTML = "HTML",
+  CSV = "CSV",
   UNKNOWN = "UNKNOWN",
 }
 
@@ -63,6 +65,9 @@ export default function MediaDisplay({
     if (media_mime_type === "text/html") {
       return MediaType.HTML;
     }
+    if (media_mime_type === "text/csv") {
+      return MediaType.CSV;
+    }
     return MediaType.UNKNOWN;
   };
 
@@ -105,6 +110,13 @@ export default function MediaDisplay({
           className="tw-h-full tw-w-full"
         />
       );
+    case MediaType.CSV:
+      return (
+        <DropMediaAttachmentCard
+          src={media_url}
+          mimeType={media_mime_type}
+        />
+      );
     case MediaType.UNKNOWN:
       return <></>;
     default:

components/waves/CreateDropActions.tsx

@@ -57,6 +57,10 @@ const CreateDropActions: React.FC<CreateDropActionsProps> = memo(
       e.target.value = "";
     };
 
+    const fileInputAccept = isDropMode
+      ? "image/*,video/*,audio/*"
+      : "image/*,video/*,audio/*,.csv,text/csv";
+
     useEffect(() => {
       if (!showGifPicker || !gifPickerEnabled) return;
 
@@ -167,7 +171,7 @@ const CreateDropActions: React.FC<CreateDropActionsProps> = memo(
                       <input
                         type="file"
                         className="tw-hidden"
-                        accept="image/*,video/*,audio/*"
+                        accept={fileInputAccept}
                         multiple
                         onChange={onFiles}
                       />

components/waves/CreateDropContent.tsx

@@ -139,6 +139,9 @@ const isMetadataValuePresent = (value: string | number | null): boolean => {
 const hasMetadataContent = (metadata: CreateDropMetadataType[]): boolean =>
   metadata.some((item) => isMetadataValuePresent(item.value));
 
+const isCsvFile = (file: File): boolean =>
+  file.type === "text/csv" || file.name.toLowerCase().endsWith(".csv");
+
 const hasSubmissionContent = ({
   markdown,
   files,
@@ -966,7 +969,24 @@ const CreateDropContent: React.FC<CreateDropContentProps> = ({
   }, [activeDrop, isApp, focusMobileInput]);
 
   const handleFileChange = (newFiles: File[]) => {
-    let updatedFiles = [...files, ...newFiles];
+    let acceptedFiles = [...newFiles];
+
+    if (isDropMode) {
+      const rejectedCsvFiles = acceptedFiles.filter(isCsvFile);
+      if (rejectedCsvFiles.length) {
+        setToast({
+          message: "CSV attachments are only supported on chat drops.",
+          type: "error",
+        });
+        acceptedFiles = acceptedFiles.filter((file) => !isCsvFile(file));
+      }
+    }
+
+    if (!acceptedFiles.length) {
+      return;
+    }
+
+    let updatedFiles = [...files, ...acceptedFiles];
     let removedCount = 0;
 
     if (updatedFiles.length > MAX_DROP_UPLOAD_FILES) {