apps/web/components/ui/markdown/markdown-readonly.tsx


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import React from "react";
import CopyBtn from "@/components/ui/copy-button";
import { cn } from "@/lib/utils";
import Markdown from "react-markdown";
import { Prism as SyntaxHighlighter } from "react-syntax-highlighter";
import { dracula } from "react-syntax-highlighter/dist/cjs/styles/prism";
import remarkBreaks from "remark-breaks";
import remarkGfm from "remark-gfm";

function PreWithCopyBtn({ className, ...props }: React.ComponentProps<"pre">) {
  const ref = React.useRef<HTMLPreElement>(null);
  return (
    <span className="group relative">
      <CopyBtn
        className="absolute right-1 top-1 m-1 hidden text-white group-hover:block"
        getStringToCopy={() => {
          return ref.current?.textContent ?? "";
        }}
      />
      <pre ref={ref} className={cn(className, "")} {...props} />
    </span>
  );
}

export function MarkdownReadonly({ children: markdown }: { children: string }) {
  return (
    <Markdown
      remarkPlugins={[remarkGfm, remarkBreaks]}
      className="prose dark:prose-invert"
      components={{
        pre({ ...props }) {
          return <PreWithCopyBtn {...props} />;
        },
        code({ className, children, ...props }) {
          const match = /language-(\w+)/.exec(className ?? "");
          return match ? (
            // @ts-expect-error -- Refs are not compatible for some reason
            <SyntaxHighlighter
              PreTag="div"
              language={match[1]}
              {...props}
              style={dracula}
            >
              {String(children).replace(/\n$/, "")}
            </SyntaxHighlighter>
          ) : (
            <code className={className} {...props}>
              {children}
            </code>
          );
        },
      }}
    >
      {markdown}
    </Markdown>
  );
}