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49 changes: 49 additions & 0 deletions
49
app/frontend/src/components/MarkdownViewer/MarkdownViewer.module.css
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.downloadButton { | ||
position: relative; | ||
float: right; | ||
} | ||
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.markdownViewer { | ||
border-radius: 8px; | ||
box-shadow: | ||
#0000000d 0 0 0 1px, | ||
#0000001a 0 2px 3px; | ||
background-color: white; | ||
margin: 20px 0; | ||
} | ||
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.loading { | ||
padding: 100px; | ||
height: 100vh; | ||
background-color: white; | ||
} | ||
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.error { | ||
height: 100vh; | ||
background-color: white; | ||
} | ||
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.markdown { | ||
padding: 30px; | ||
} | ||
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table { | ||
border-collapse: collapse; | ||
} | ||
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th, | ||
td { | ||
border: 1px solid #ddd; | ||
padding: 8px; | ||
} | ||
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tr:nth-child(even) { | ||
background-color: #f6f8fa; | ||
} | ||
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code { | ||
display: block; | ||
font-family: monospace; | ||
padding: 10px; | ||
background-color: #f6f8fa; | ||
} |
78 changes: 78 additions & 0 deletions
78
app/frontend/src/components/MarkdownViewer/MarkdownViewer.tsx
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import React, { useState, useEffect } from "react"; | ||
import { marked } from "marked"; | ||
import styles from "./MarkdownViewer.module.css"; | ||
import { Spinner, SpinnerSize, MessageBar, MessageBarType, Link, IconButton } from "@fluentui/react"; | ||
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interface MarkdownViewerProps { | ||
src: string; | ||
} | ||
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export const MarkdownViewer: React.FC<MarkdownViewerProps> = ({ src }) => { | ||
const [content, setContent] = useState<string>(""); | ||
const [isLoading, setIsLoading] = useState<boolean>(true); | ||
const [error, setError] = useState<Error | null>(null); | ||
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/** | ||
* Anchor links are not handled well by 'marked' and result in HTTP 404 errors as the URL they point to does not exist. | ||
* This function removes them from the resulted HTML. | ||
*/ | ||
const removeAnchorLinks = (html: string) => { | ||
const ancorLinksRegex = /<a\s+(?:[^>]*?\s+)?href=['"](#[^"']*?)['"][^>]*?>/g; | ||
return html.replace(ancorLinksRegex, ""); | ||
}; | ||
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useEffect(() => { | ||
const fetchMarkdown = async () => { | ||
try { | ||
const response = await fetch(src); | ||
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if (!response.ok) { | ||
throw new Error("Failed loading markdown file."); | ||
} | ||
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const markdownText = await response.text(); | ||
const parsedHtml = await marked.parse(markdownText); | ||
const cleanedHtml = removeAnchorLinks(parsedHtml); | ||
setContent(cleanedHtml); | ||
} catch (error: any) { | ||
setError(error); | ||
} finally { | ||
setIsLoading(false); | ||
} | ||
}; | ||
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fetchMarkdown(); | ||
}, [src]); | ||
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return ( | ||
<div> | ||
{isLoading ? ( | ||
<div className={`${styles.loading} ${styles.markdownViewer}`}> | ||
<Spinner size={SpinnerSize.large} label="Loading file" /> | ||
</div> | ||
) : error ? ( | ||
<div className={`${styles.error} ${styles.markdownViewer}`}> | ||
<MessageBar messageBarType={MessageBarType.error} isMultiline={false}> | ||
{error.message} | ||
<Link href={src} download> | ||
Download the file | ||
</Link> | ||
</MessageBar> | ||
</div> | ||
) : ( | ||
<div> | ||
<IconButton | ||
className={styles.downloadButton} | ||
style={{ color: "black" }} | ||
iconProps={{ iconName: "Save" }} | ||
title="Save" | ||
ariaLabel="Save" | ||
href={src} | ||
download | ||
/> | ||
<div className={`${styles.markdown} ${styles.markdownViewer}`} dangerouslySetInnerHTML={{ __html: content }} /> | ||
</div> | ||
)} | ||
</div> | ||
); | ||
}; |
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export * from "./MarkdownViewer"; |
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