Merge pull request #276 from bknd-io/feat/media-field-improvements

feat: improve media handling
2026-03-15 20:17:22 +00:00 · 2025-09-29 17:19:57 +02:00
parent 0d74625270 5e71fc8947
commit 5e553a7fce
16 changed files with 365 additions and 38 deletions
--- a/app/test/_assets/test.mp3
+++ b/app/test/_assets/test.mp3
--- a/app/test/_assets/test.txt
+++ b/app/test/_assets/test.txt
@@ -0,0 +1 @@
+hello
--- a/app/test/media/MediaController.spec.ts
+++ b/app/test/media/MediaController.spec.ts
@@ -10,7 +10,7 @@ import { assetsPath, assetsTmpPath } from "../helper";
 import { disableConsoleLog, enableConsoleLog } from "core/utils/test";

 beforeAll(() => {
-   disableConsoleLog();
+   //disableConsoleLog();
   registries.media.register("local", StorageLocalAdapter);
 });
 afterAll(enableConsoleLog);
@@ -94,4 +94,38 @@ describe("MediaController", () => {
      expect(res.status).toBe(413);
      expect(await Bun.file(assetsTmpPath + "/" + name).exists()).toBe(false);
   });
+
+   test("audio files", async () => {
+      const app = await makeApp();
+      const file = Bun.file(`${assetsPath}/test.mp3`);
+      const name = makeName("mp3");
+      const res = await app.server.request("/api/media/upload/" + name, {
+         method: "POST",
+         body: file,
+      });
+      const result = (await res.json()) as any;
+      expect(result.data.mime_type).toStartWith("audio/mpeg");
+      expect(result.name).toBe(name);
+
+      const destFile = Bun.file(assetsTmpPath + "/" + name);
+      expect(destFile.exists()).resolves.toBe(true);
+      await destFile.delete();
+   });
+
+   test("text files", async () => {
+      const app = await makeApp();
+      const file = Bun.file(`${assetsPath}/test.txt`);
+      const name = makeName("txt");
+      const res = await app.server.request("/api/media/upload/" + name, {
+         method: "POST",
+         body: file,
+      });
+      const result = (await res.json()) as any;
+      expect(result.data.mime_type).toStartWith("text/plain");
+      expect(result.name).toBe(name);
+
+      const destFile = Bun.file(assetsTmpPath + "/" + name);
+      expect(destFile.exists()).resolves.toBe(true);
+      await destFile.delete();
+   });
 });
--- a/app/test/media/mime-types.spec.ts
+++ b/app/test/media/mime-types.spec.ts
@@ -72,6 +72,7 @@ describe("media/mime-types", () => {
         ["text/tab-separated-values", "tsv"],
         ["application/zip", "zip"],
         ["application/pdf", "pdf"],
+         ["audio/mpeg", "mp3"],
      ] as const;

      for (const [mime, ext] of tests) {
@@ -90,6 +91,8 @@ describe("media/mime-types", () => {
         ["-473Wx593H-466453554-black-MODEL.jpg", "jpg"],
         ["-473Wx593H-466453554-black-MODEL.avif", "avif"],
         ["file.pdf", "pdf"],
+         ["file.mp3", "mp3"],
+         ["robots.txt", "txt"],
      ] as const;

      for (const [filename, ext] of tests) {
@@ -127,5 +130,13 @@ describe("media/mime-types", () => {
         ).split(".");
         expect(ext).toBe("what");
      }
+
+      {
+         // txt
+         const [, ext] = getRandomizedFilename(
+            new File([""], "file.txt", { type: "text/plain" }),
+         ).split(".");
+         expect(ext).toBe("txt");
+      }
   });
 });
--- a/app/src/adapter/cloudflare/storage/StorageR2Adapter.vitest.ts
+++ b/app/src/adapter/cloudflare/storage/StorageR2Adapter.vitest.ts
@@ -28,7 +28,8 @@ describe("StorageR2Adapter", async () => {
   const buffer = readFileSync(path.join(basePath, "image.png"));
   const file = new File([buffer], "image.png", { type: "image/png" });

-   await adapterTestSuite(viTestRunner, adapter, file);
+   // miniflare doesn't support range requests
+   await adapterTestSuite(viTestRunner, adapter, file, { testRange: false });
 });

 afterAll(async () => {
--- a/app/src/adapter/node/storage/StorageLocalAdapter.ts
+++ b/app/src/adapter/node/storage/StorageLocalAdapter.ts
@@ -80,18 +80,79 @@ export class StorageLocalAdapter extends StorageAdapter {
      }
   }

+   private parseRangeHeader(
+      rangeHeader: string,
+      fileSize: number,
+   ): { start: number; end: number } | null {
+      // Parse "bytes=start-end" format
+      const match = rangeHeader.match(/^bytes=(\d*)-(\d*)$/);
+      if (!match) return null;
+
+      const [, startStr, endStr] = match;
+      let start = startStr ? Number.parseInt(startStr, 10) : 0;
+      let end = endStr ? Number.parseInt(endStr, 10) : fileSize - 1;
+
+      // Handle suffix-byte-range-spec (e.g., "bytes=-500")
+      if (!startStr && endStr) {
+         start = Math.max(0, fileSize - Number.parseInt(endStr, 10));
+         end = fileSize - 1;
+      }
+
+      // Validate range
+      if (start < 0 || end >= fileSize || start > end) {
+         return null;
+      }
+
+      return { start, end };
+   }
+
   async getObject(key: string, headers: Headers): Promise<Response> {
      try {
-         const content = await readFile(`${this.config.path}/${key}`);
+         const filePath = `${this.config.path}/${key}`;
+         const stats = await stat(filePath);
+         const fileSize = stats.size;
         const mimeType = guessMimeType(key);

+         const responseHeaders = new Headers({
+            "Accept-Ranges": "bytes",
+            "Content-Type": mimeType || "application/octet-stream",
+         });
+
+         const rangeHeader = headers.get("range");
+
+         if (rangeHeader) {
+            const range = this.parseRangeHeader(rangeHeader, fileSize);
+
+            if (!range) {
+               // Invalid range - return 416 Range Not Satisfiable
+               responseHeaders.set("Content-Range", `bytes */${fileSize}`);
+               return new Response("", {
+                  status: 416,
+                  headers: responseHeaders,
+               });
+            }
+
+            const { start, end } = range;
+            const content = await readFile(filePath, { encoding: null });
+            const chunk = content.slice(start, end + 1);
+
+            responseHeaders.set("Content-Range", `bytes ${start}-${end}/${fileSize}`);
+            responseHeaders.set("Content-Length", chunk.length.toString());
+
+            return new Response(chunk, {
+               status: 206, // Partial Content
+               headers: responseHeaders,
+            });
+         } else {
+            // Normal request - return entire file
+            const content = await readFile(filePath);
+            responseHeaders.set("Content-Length", content.length.toString());
+
            return new Response(content, {
               status: 200,
-            headers: {
-               "Content-Type": mimeType || "application/octet-stream",
-               "Content-Length": content.length.toString(),
-            },
+               headers: responseHeaders,
            });
+         }
      } catch (error) {
         // Handle file reading errors
         return new Response("", { status: 404 });
--- a/app/src/media/AppMedia.ts
+++ b/app/src/media/AppMedia.ts
@@ -8,6 +8,7 @@ import { MediaController } from "./api/MediaController";
 import { buildMediaSchema, registry, type TAppMediaConfig } from "./media-schema";
 import { mediaFields } from "./media-entities";
 import * as MediaPermissions from "media/media-permissions";
+import * as DatabaseEvents from "data/events";

 export type MediaFields = typeof AppMedia.mediaFields;
 export type MediaFieldSchema = FieldSchema<typeof AppMedia.mediaFields>;
@@ -139,6 +140,30 @@ export class AppMedia extends Module<Required<TAppMediaConfig>> {
         },
         { mode: "sync", id: "delete-data-media" },
      );
+
+      emgr.onEvent(
+         DatabaseEvents.MutatorDeleteAfter,
+         async (e) => {
+            const { entity, data } = e.params;
+            const fields = entity.fields.filter((f) => f.type === "media");
+            if (fields.length > 0) {
+               const references = fields.map((f) => `${entity.name}.${f.name}`);
+               $console.log("App:storage:file cleaning up", {
+                  reference: { $in: references },
+                  entity_id: String(data.id),
+               });
+               const { data: deleted } = await em.mutator(media).deleteWhere({
+                  reference: { $in: references },
+                  entity_id: String(data.id),
+               });
+               for (const file of deleted) {
+                  await this.storage.deleteFile(file.path);
+               }
+               $console.log("App:storage:file cleaned up files:", deleted.length);
+            }
+         },
+         { mode: "async", id: "delete-data-media-after" },
+      );
   }

   override getOverwritePaths() {
--- a/app/src/media/MediaField.ts
+++ b/app/src/media/MediaField.ts
@@ -43,6 +43,10 @@ export class MediaField<
      return this.config.max_items;
   }

+   getAllowedMimeTypes(): string[] | undefined {
+      return this.config.mime_types;
+   }
+
   getMinItems(): number | undefined {
      return this.config.min_items;
   }
--- a/app/src/media/storage/Storage.ts
+++ b/app/src/media/storage/Storage.ts
@@ -71,22 +71,29 @@ export class Storage implements EmitsEvents {

      let info: FileUploadPayload = {
         name,
-         meta: {
+         meta: isFile(file)
+            ? {
+                 size: file.size,
+                 type: file.type,
+              }
+            : {
                 size: 0,
                 type: "application/octet-stream",
              },
         etag: typeof result === "string" ? result : "",
      };

+      // normally only etag is returned
      if (typeof result === "object") {
         info = result;
-      } else if (isFile(file)) {
-         info.meta.size = file.size;
-         info.meta.type = file.type;
      }

      // try to get better meta info
-      if (!isMimeType(info.meta.type, ["application/octet-stream", "application/json"])) {
+      if (
+         !info.meta.type ||
+         ["application/octet-stream", "application/json"].includes(info.meta.type) ||
+         !info.meta.size
+      ) {
         const meta = await this.#adapter.getObjectMeta(name);
         if (!meta) {
            throw new Error("Failed to get object meta");
--- a/app/src/media/storage/adapters/adapter-test-suite.ts
+++ b/app/src/media/storage/adapters/adapter-test-suite.ts
@@ -11,12 +11,14 @@ export async function adapterTestSuite(
      retries?: number;
      retryTimeout?: number;
      skipExistsAfterDelete?: boolean;
+      testRange?: boolean;
   },
 ) {
   const { test, expect } = testRunner;
   const options = {
      retries: opts?.retries ?? 1,
      retryTimeout: opts?.retryTimeout ?? 1000,
+      testRange: opts?.testRange ?? true,
   };

   let objects = 0;
@@ -53,9 +55,34 @@ export async function adapterTestSuite(
   await test("gets an object", async () => {
      const res = await adapter.getObject(filename, new Headers());
      expect(res.ok).toBe(true);
+      expect(res.headers.get("Accept-Ranges")).toBe("bytes");
      // @todo: check the content
   });

+   if (options.testRange) {
+      await test("handles range request - partial content", async () => {
+         const headers = new Headers({ Range: "bytes=0-99" });
+         const res = await adapter.getObject(filename, headers);
+         expect(res.status).toBe(206); // Partial Content
+         expect(/^bytes 0-99\/\d+$/.test(res.headers.get("Content-Range")!)).toBe(true);
+         expect(res.headers.get("Accept-Ranges")).toBe("bytes");
+      });
+
+      await test("handles range request - suffix range", async () => {
+         const headers = new Headers({ Range: "bytes=-100" });
+         const res = await adapter.getObject(filename, headers);
+         expect(res.status).toBe(206); // Partial Content
+         expect(/^bytes \d+-\d+\/\d+$/.test(res.headers.get("Content-Range")!)).toBe(true);
+      });
+
+      await test("handles invalid range request", async () => {
+         const headers = new Headers({ Range: "bytes=invalid" });
+         const res = await adapter.getObject(filename, headers);
+         expect(res.status).toBe(416); // Range Not Satisfiable
+         expect(/^bytes \*\/\d+$/.test(res.headers.get("Content-Range")!)).toBe(true);
+      });
+   }
+
   await test("gets object meta", async () => {
      expect(await adapter.getObjectMeta(filename)).toEqual({
         type: file.type, // image/png
--- a/app/src/media/storage/mime-types-tiny.ts
+++ b/app/src/media/storage/mime-types-tiny.ts
@@ -3,7 +3,7 @@ export const Q = {
   audio: ["ogg"],
   image: ["jpeg", "png", "gif", "webp", "bmp", "tiff", "avif", "heic", "heif"],
   text: ["html", "css", "mdx", "yaml", "vcard", "csv", "vtt"],
-   application: ["zip", "xml", "toml", "json", "json5", "pdf"],
+   application: ["zip", "toml", "json", "json5", "pdf", "xml"],
   font: ["woff", "woff2", "ttf", "otf"],
 } as const;

@@ -15,10 +15,12 @@ const c = {
   a: (w = "octet-stream") => `application/${w}`,
   i: (w) => `image/${w}`,
   v: (w) => `video/${w}`,
+   au: (w) => `audio/${w}`,
 } as const;
 export const M = new Map<string, string>([
   ["7z", c.z],
   ["7zip", c.z],
+   ["txt", c.t()],
   ["ai", c.a("postscript")],
   ["apk", c.a("vnd.android.package-archive")],
   ["doc", c.a("msword")],
@@ -32,12 +34,12 @@ export const M = new Map<string, string>([
   ["jpg", c.i("jpeg")],
   ["js", c.t("javascript")],
   ["log", c.t()],
-   ["m3u", c.t()],
+   ["m3u", c.au("x-mpegurl")],
   ["m3u8", c.a("vnd.apple.mpegurl")],
   ["manifest", c.t("cache-manifest")],
   ["md", c.t("markdown")],
   ["mkv", c.v("x-matroska")],
-   ["mp3", c.a("mpeg")],
+   ["mp3", c.au("mpeg")],
   ["mobi", c.a("x-mobipocket-ebook")],
   ["ppt", c.a("powerpoint")],
   ["pptx", `${c.vnd}.presentationml.presentation`],
@@ -46,11 +48,10 @@ export const M = new Map<string, string>([
   ["tif", c.i("tiff")],
   ["tsv", c.t("tab-separated-values")],
   ["tgz", c.a("x-tar")],
-   ["txt", c.t()],
   ["text", c.t()],
   ["vcd", c.a("x-cdlink")],
   ["vcs", c.t("x-vcalendar")],
-   ["wav", c.a("x-wav")],
+   ["wav", c.au("vnd.wav")],
   ["webmanifest", c.a("manifest+json")],
   ["xls", c.a("vnd.ms-excel")],
   ["xlsx", `${c.vnd}.spreadsheetml.sheet`],
--- a/app/src/ui/elements/media/Dropzone.tsx
+++ b/app/src/ui/elements/media/Dropzone.tsx
@@ -42,7 +42,10 @@ export type DropzoneRenderProps = {
   showPlaceholder: boolean;
   onClick?: (file: { path: string }) => void;
   footer?: ReactNode;
-   dropzoneProps: Pick<DropzoneProps, "maxItems" | "placeholder" | "autoUpload" | "flow">;
+   dropzoneProps: Pick<
+      DropzoneProps,
+      "maxItems" | "placeholder" | "autoUpload" | "flow" | "allowedMimeTypes"
+   >;
 };

 export type DropzoneProps = {
@@ -151,6 +154,7 @@ export function Dropzone({
   const setIsOver = useStore(store, (state) => state.setIsOver);
   const uploading = useStore(store, (state) => state.uploading);
   const setFileState = useStore(store, (state) => state.setFileState);
+   const overrideFile = useStore(store, (state) => state.overrideFile);
   const removeFile = useStore(store, (state) => state.removeFile);
   const inputRef = useRef<HTMLInputElement>(null);

@@ -169,9 +173,14 @@ export function Dropzone({

      return specs.every((spec) => {
         if (spec.kind !== "file") {
+            console.log("not a file", spec.kind);
            return false;
         }
-         return !(allowedMimeTypes && !allowedMimeTypes.includes(spec.type));
+         if (allowedMimeTypes && allowedMimeTypes.length > 0) {
+            console.log("not allowed mimetype", spec.type);
+            return allowedMimeTypes.includes(spec.type);
+         }
+         return true;
      });
   }

@@ -359,7 +368,7 @@ export function Dropzone({
                     state: "uploaded",
                  };

-                  setFileState(file.path, newState.state);
+                  overrideFile(file.path, newState);
                  resolve({ ...response, ...file, ...newState });
               } catch (e) {
                  setFileState(file.path, "uploaded", 1);
@@ -382,7 +391,9 @@ export function Dropzone({
         };

         xhr.setRequestHeader("Accept", "application/json");
-         xhr.send(file.body);
+         const formData = new FormData();
+         formData.append("file", file.body);
+         xhr.send(formData);
      });
   }

@@ -411,7 +422,9 @@ export function Dropzone({
   const openFileInput = useCallback(() => inputRef.current?.click(), [inputRef]);
   const showPlaceholder = useMemo(
      () =>
-         Boolean(placeholder?.show === true || !maxItems || (maxItems && files.length < maxItems)),
+         Boolean(
+            placeholder?.show !== false && (!maxItems || (maxItems && files.length < maxItems)),
+         ),
      [placeholder, maxItems, files.length],
   );

@@ -424,6 +437,7 @@ export function Dropzone({
            type: "file",
            multiple: !maxItems || maxItems > 1,
            onChange: handleFileInputChange,
+            accept: allowedMimeTypes?.join(","),
         },
         showPlaceholder,
         actions: {
@@ -437,11 +451,12 @@ export function Dropzone({
            placeholder,
            autoUpload,
            flow,
+            allowedMimeTypes,
         },
         onClick,
         footer,
      }),
-      [maxItems, flow, placeholder, autoUpload, footer],
+      [maxItems, files.length, flow, placeholder, autoUpload, footer, allowedMimeTypes],
   ) as unknown as DropzoneRenderProps;

   return (
--- a/app/src/ui/elements/media/DropzoneInner.tsx
+++ b/app/src/ui/elements/media/DropzoneInner.tsx
@@ -1,7 +1,22 @@
 import { type ComponentPropsWithoutRef, memo, type ReactNode, useCallback, useMemo } from "react";
 import { twMerge } from "tailwind-merge";
 import { useRenderCount } from "ui/hooks/use-render-count";
-import { TbDots, TbExternalLink, TbTrash, TbUpload } from "react-icons/tb";
+import {
+   TbDots,
+   TbExternalLink,
+   TbFileTypeCsv,
+   TbFileText,
+   TbJson,
+   TbFileTypePdf,
+   TbMarkdown,
+   TbMusic,
+   TbTrash,
+   TbUpload,
+   TbFileTypeTxt,
+   TbFileTypeXml,
+   TbZip,
+   TbFileTypeSql,
+} from "react-icons/tb";
 import { Dropdown, type DropdownItem } from "ui/components/overlay/Dropdown";
 import { IconButton } from "ui/components/buttons/IconButton";
 import { formatNumber } from "core/utils";
@@ -22,7 +37,7 @@ export const DropzoneInner = ({
   inputProps,
   showPlaceholder,
   actions: { uploadFile, deleteFile, openFileInput },
-   dropzoneProps: { placeholder, flow },
+   dropzoneProps: { placeholder, flow, maxItems, allowedMimeTypes },
   onClick,
   footer,
 }: DropzoneRenderProps) => {
@@ -85,7 +100,7 @@ const UploadPlaceholder = ({ onClick, text = "Upload files" }) => {
   );
 };

-type ReducedFile = Pick<FileState, "body" | "type" | "path" | "name" | "size">;
+type ReducedFile = Omit<FileState, "state" | "progress">;
 export type PreviewComponentProps = {
   file: ReducedFile;
   fallback?: (props: { file: ReducedFile }) => ReactNode;
@@ -159,9 +174,9 @@ const Preview = memo(
                  <p className="truncate select-text w-[calc(100%-10px)]">{file.name}</p>
                  <StateIndicator file={file} />
               </div>
-               <div className="flex flex-row justify-between text-sm font-mono opacity-50 text-nowrap gap-2">
+               <div className="flex flex-row justify-between text-xs md:text-sm font-mono opacity-50 text-nowrap gap-2">
                  <span className="truncate select-text">{file.type}</span>
-                  <span>{formatNumber.fileSize(file.size)}</span>
+                  <span className="whitespace-nowrap">{formatNumber.fileSize(file.size)}</span>
               </div>
            </div>
         </div>
@@ -271,6 +286,59 @@ const VideoPreview = ({
   return <video {...props} src={objectUrl} />;
 };

+const Previews = [
+   {
+      mime: "text/plain",
+      Icon: TbFileTypeTxt,
+   },
+   {
+      mime: "text/csv",
+      Icon: TbFileTypeCsv,
+   },
+   {
+      mime: /(text|application)\/xml/,
+      Icon: TbFileTypeXml,
+   },
+   {
+      mime: "text/markdown",
+      Icon: TbMarkdown,
+   },
+   {
+      mime: /^text\/.*$/,
+      Icon: TbFileText,
+   },
+   {
+      mime: "application/json",
+      Icon: TbJson,
+   },
+   {
+      mime: "application/pdf",
+      Icon: TbFileTypePdf,
+   },
+   {
+      mime: /^audio\/.*$/,
+      Icon: TbMusic,
+   },
+   {
+      mime: "application/zip",
+      Icon: TbZip,
+   },
+   {
+      mime: "application/sql",
+      Icon: TbFileTypeSql,
+   },
+];
+
 const FallbackPreview = ({ file }: { file: ReducedFile }) => {
-   return <div className="text-xs text-primary/50 text-center">{file.type}</div>;
+   const previewIcon = Previews.find((p) =>
+      p.mime instanceof RegExp ? p.mime.test(file.type) : p.mime === file.type,
+   );
+   if (previewIcon) {
+      return <previewIcon.Icon className="size-10 text-gray-400" />;
+   }
+   return (
+      <div className="text-xs text-primary/50 text-center font-mono leading-none max-w-[90%] truncate">
+         {file.type}
+      </div>
+   );
 };
--- a/app/src/ui/elements/media/dropzone-state.ts
+++ b/app/src/ui/elements/media/dropzone-state.ts
@@ -36,6 +36,10 @@ export const createDropzoneStore = () => {
                        : f,
                  ),
               })),
+            overrideFile: (path: string, newState: Partial<FileState>) =>
+               set((state) => ({
+                  files: state.files.map((f) => (f.path === path ? { ...f, ...newState } : f)),
+               })),
         }),
      ),
   );
--- a/app/src/ui/modals/media/MediaInfoModal.tsx
+++ b/app/src/ui/modals/media/MediaInfoModal.tsx
@@ -1,5 +1,5 @@
 import type { ContextModalProps } from "@mantine/modals";
-import type { ReactNode } from "react";
+import { type ReactNode, useEffect, useMemo, useState } from "react";
 import { useEntityQuery } from "ui/client";
 import { type FileState, Media } from "ui/elements";
 import { autoFormatString, datetimeStringLocal, formatNumber } from "core/utils";
@@ -43,7 +43,7 @@ export function MediaInfoModal({

   return (
      <div className="flex flex-col md:flex-row">
-         <div className="flex w-full md:w-[calc(100%-300px)] justify-center items-center bg-lightest min-w-0">
+         <div className="flex w-full md:w-[calc(100%-300px)] justify-center items-center bg-lightest min-w-50">
            <FilePreview file={file} />
         </div>
         <div className="w-full md:!w-[300px] flex flex-col">
@@ -156,12 +156,38 @@ const Item = ({
   );
 };

+const textFormats = [/^text\/.*$/, /application\/(x\-)?(json|json|yaml|javascript|xml|rtf|sql)/];
+
 const FilePreview = ({ file }: { file: FileState }) => {
+   const objectUrl = typeof file.body === "string" ? file.body : URL.createObjectURL(file.body);
+
   if (file.type.startsWith("image/") || file.type.startsWith("video/")) {
      // @ts-ignore
      return <Media.Preview file={file} className="max-h-[70dvh]" controls muted />;
   }

+   if (file.type === "application/pdf") {
+      // use browser preview
+      return (
+         <iframe
+            title="PDF preview"
+            src={`${objectUrl}#view=fitH&zoom=page-width&toolbar=1`}
+            className="w-250 max-w-[80dvw] h-[80dvh]"
+         />
+      );
+   }
+   if (textFormats.some((f) => f.test(file.type))) {
+      return <TextPreview file={file} />;
+   }
+
+   if (file.type.startsWith("audio/")) {
+      return (
+         <div className="p-5">
+            <audio src={objectUrl} controls />
+         </div>
+      );
+   }
+
   return (
      <div className="min-w-96 min-h-48 flex justify-center items-center h-full max-h-[70dvh]">
         <span className="opacity-50 font-mono">No Preview Available</span>
@@ -169,6 +195,44 @@ const FilePreview = ({ file }: { file: FileState }) => {
   );
 };

+const TextPreview = ({ file }: { file: FileState }) => {
+   const [text, setText] = useState("");
+   const objectUrl = typeof file.body === "string" ? file.body : URL.createObjectURL(file.body);
+   const maxBytes = 1024 * 256;
+   const useRange = file.size > maxBytes;
+
+   useEffect(() => {
+      let cancelled = false;
+
+      if (file) {
+         fetch(objectUrl, {
+            headers: useRange ? { Range: `bytes=0-${maxBytes - 1}` } : undefined,
+         })
+            .then((r) => r.text())
+            .then((t) => {
+               if (!cancelled) setText(t);
+            });
+      } else {
+         setText("");
+      }
+      return () => {
+         cancelled = true;
+      };
+   }, [file, useRange]);
+
+   return (
+      <pre className="text-sm font-mono whitespace-pre-wrap break-all overflow-y-scroll w-250 md:max-w-[80dvw] h-[60dvh] md:h-[80dvh] py-4 px-6">
+         {text}
+
+         {useRange && (
+            <div className="mt-3 opacity-50 text-xs text-center">
+               Showing first {formatNumber.fileSize(maxBytes)}
+            </div>
+         )}
+      </pre>
+   );
+};
+
 MediaInfoModal.defaultTitle = undefined;
 MediaInfoModal.modalProps = {
   withCloseButton: false,
--- a/app/src/ui/modules/data/components/EntityForm.tsx
+++ b/app/src/ui/modules/data/components/EntityForm.tsx
@@ -240,6 +240,8 @@ function EntityMediaFormField({
   disabled?: boolean;
 }) {
   if (!entityId) return;
+   const maxLimit = 50;
+   const maxItems = field.getMaxItems();

   const value = useStore(formApi.store, (state) => {
      const val = state.values[field.name];
@@ -260,8 +262,9 @@ function EntityMediaFormField({
         <FieldLabel field={field} />
         <Media.Dropzone
            key={key}
-            maxItems={field.getMaxItems()}
-            initialItems={value} /* @todo: test if better be omitted, so it fetches */
+            maxItems={maxItems}
+            allowedMimeTypes={field.getAllowedMimeTypes()}
+            /* initialItems={value} @todo: test if better be omitted, so it fetches */
            onClick={onClick}
            entity={{
               name: entity.name,
@@ -270,6 +273,7 @@ function EntityMediaFormField({
            }}
            query={{
               sort: "-id",
+               limit: maxItems && maxItems > maxLimit ? maxLimit : maxItems,
            }}
         />
      </Formy.Group>