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feat: add PDF to Markdown conversion tool #9

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1 change: 1 addition & 0 deletions app/tools/[toolId]/page.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ const toolComponents: Record<string, React.ComponentType> = {
"time-calc": dynamic(() => import("@/components/tools/time-calc").then(mod => mod.TimeCalcTool)),
"unit-converter": dynamic(() => import("@/components/tools/unit-converter").then(mod => mod.UnitConverterTool)),
"encoder": dynamic(() => import("@/components/tools/encoder").then(mod => mod.EncoderTool)),
"pdf-to-markdown": dynamic(() => import("@/components/tools/pdf-to-markdown").then(mod => mod.PdfToMarkdownTool)),
};

interface ToolPageProps {
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346 changes: 346 additions & 0 deletions components/tools/pdf-to-markdown.tsx
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Original file line number Diff line number Diff line change
@@ -0,0 +1,346 @@
"use client";

import { useState, useCallback, useRef } from "react";
import { Upload, Download, Copy, Check, FileText, Loader2 } from "lucide-react";
import { Button } from "@/components/ui/button";
import { Switch } from "@/components/ui/switch";
import { Label } from "@/components/ui/label";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import {
Select,
SelectContent,
SelectItem,
SelectTrigger,
SelectValue,
} from "@/components/ui/select";
import { cn } from "@/lib/utils";
import ReactMarkdown from "react-markdown";
import remarkGfm from "remark-gfm";
import {
convertPdfToMarkdown,
ConversionOptions,
ConversionStats,
} from "@/lib/pdf-to-markdown";

export function PdfToMarkdownTool() {
const [file, setFile] = useState<File | null>(null);
const [markdown, setMarkdown] = useState<string>("");
const [stats, setStats] = useState<ConversionStats | null>(null);
const [isConverting, setIsConverting] = useState(false);
const [progress, setProgress] = useState({ current: 0, total: 0 });
const [copied, setCopied] = useState(false);
const [error, setError] = useState<string | null>(null);

// Options
const [headingSensitivity, setHeadingSensitivity] = useState<
ConversionOptions["headingSensitivity"]
>("medium");
const [detectLists, setDetectLists] = useState(true);
const [addPageBreaks, setAddPageBreaks] = useState(true);

const fileInputRef = useRef<HTMLInputElement>(null);

const handleFileSelect = useCallback(
async (selectedFile: File) => {
if (!selectedFile.type.includes("pdf")) {
setError("Please select a PDF file");
return;
}

setFile(selectedFile);
setError(null);
setIsConverting(true);
setProgress({ current: 0, total: 0 });

try {
const arrayBuffer = await selectedFile.arrayBuffer();
const result = await convertPdfToMarkdown(
arrayBuffer,
{
headingSensitivity,
detectLists,
addPageBreaks,
},
(current, total) => {
setProgress({ current, total });
}
);

setMarkdown(result.markdown);
setStats(result.stats);
} catch (err) {
console.error("PDF conversion failed:", err);
setError(
err instanceof Error ? err.message : "Failed to convert PDF"
);
setMarkdown("");
setStats(null);
} finally {
setIsConverting(false);
}
},
[headingSensitivity, detectLists, addPageBreaks]
);

const handleDrop = useCallback(
(e: React.DragEvent) => {
e.preventDefault();
const droppedFile = e.dataTransfer.files[0];
if (droppedFile) {
handleFileSelect(droppedFile);
}
},
[handleFileSelect]
);

const handleFileInputChange = useCallback(
(e: React.ChangeEvent<HTMLInputElement>) => {
const selectedFile = e.target.files?.[0];
if (selectedFile) {
handleFileSelect(selectedFile);
}
},
[handleFileSelect]
);

const reconvert = useCallback(async () => {
if (!file) return;
handleFileSelect(file);
}, [file, handleFileSelect]);

const copyToClipboard = useCallback(async () => {
try {
await navigator.clipboard.writeText(markdown);
setCopied(true);
setTimeout(() => setCopied(false), 2000);
} catch (err) {
console.error("Failed to copy:", err);
}
}, [markdown]);

const downloadMarkdown = useCallback(() => {
const blob = new Blob([markdown], { type: "text/markdown" });
const url = URL.createObjectURL(blob);
const link = document.createElement("a");
link.href = url;
const baseName = file?.name.replace(/\.pdf$/i, "") || "document";
link.download = `${baseName}.md`;
link.click();
URL.revokeObjectURL(url);
}, [markdown, file]);

const clearFile = useCallback(() => {
setFile(null);
setMarkdown("");
setStats(null);
setError(null);
if (fileInputRef.current) {
fileInputRef.current.value = "";
}
}, []);

return (
<div className="space-y-6">
{/* Options Panel */}
<div className="flex flex-wrap gap-6 items-end p-4 bg-muted/50 rounded-lg">
<div className="space-y-2">
<Label className="font-bold">Heading Detection</Label>
<Select
value={headingSensitivity}
onValueChange={(v) =>
setHeadingSensitivity(v as ConversionOptions["headingSensitivity"])
}
>
<SelectTrigger className="w-40">
<SelectValue />
</SelectTrigger>
<SelectContent>
<SelectItem value="low">Low (larger text)</SelectItem>
<SelectItem value="medium">Medium</SelectItem>
<SelectItem value="high">High (subtle)</SelectItem>
</SelectContent>
</Select>
</div>

<div className="flex items-center gap-3 h-10">
<Switch
id="detect-lists"
checked={detectLists}
onCheckedChange={setDetectLists}
/>
<Label htmlFor="detect-lists" className="cursor-pointer">
Detect lists
</Label>
</div>

<div className="flex items-center gap-3 h-10">
<Switch
id="page-breaks"
checked={addPageBreaks}
onCheckedChange={setAddPageBreaks}
/>
<Label htmlFor="page-breaks" className="cursor-pointer">
Page breaks
</Label>
</div>

{file && (
<Button
variant="outline"
onClick={reconvert}
disabled={isConverting}
className="ml-auto"
>
Re-convert
</Button>
)}
</div>

{/* Upload Zone */}
{!file && (
<div
onDrop={handleDrop}
onDragOver={(e) => e.preventDefault()}
onClick={() => fileInputRef.current?.click()}
className={cn(
"border-2 border-dashed rounded-xl p-12 text-center transition-colors cursor-pointer",
"hover:border-primary/50 hover:bg-muted/30",
error && "border-destructive"
)}
>
<input
ref={fileInputRef}
type="file"
accept=".pdf,application/pdf"
className="hidden"
onChange={handleFileInputChange}
/>
<Upload className="size-12 mx-auto text-muted-foreground mb-4" />
<p className="font-medium text-lg">Drop a PDF here</p>
<p className="text-sm text-muted-foreground mt-2">
or click to select a file
</p>
{error && (
<p className="text-sm text-destructive mt-4">{error}</p>
)}
</div>
)}

{/* Converting Progress */}
{isConverting && (
<div className="flex flex-col items-center justify-center py-12 gap-4">
<Loader2 className="size-10 animate-spin text-primary" />
<p className="text-muted-foreground">
Converting page {progress.current} of {progress.total}...
</p>
</div>
)}

{/* Results */}
{file && !isConverting && markdown && (
<div className="space-y-4">
{/* File Info & Stats */}
<div className="flex flex-wrap items-center gap-4 p-4 bg-muted/50 rounded-lg">
<div className="flex items-center gap-3">
<FileText className="size-5 text-muted-foreground" />
<span className="font-medium">{file.name}</span>
</div>

{stats && (
<div className="flex flex-wrap gap-4 text-sm text-muted-foreground ml-auto">
<span>
<strong className="text-foreground">{stats.pages}</strong> pages
</span>
<span>
<strong className="text-foreground">{stats.words.toLocaleString()}</strong> words
</span>
<span>
<strong className="text-foreground">{stats.headings}</strong> headings
</span>
<span>
<strong className="text-foreground">{stats.lists}</strong> list items
</span>
</div>
)}

<Button variant="ghost" size="sm" onClick={clearFile}>
Clear
</Button>
</div>

{/* Tabs: Preview / Raw */}
<Tabs defaultValue="preview" className="w-full">
<div className="flex items-center justify-between mb-4">
<TabsList>
<TabsTrigger value="preview">Preview</TabsTrigger>
<TabsTrigger value="raw">Raw Markdown</TabsTrigger>
</TabsList>

<div className="flex gap-2">
<Button
variant="outline"
size="sm"
onClick={copyToClipboard}
disabled={!markdown}
>
{copied ? (
<>
<Check className="size-4 mr-2" />
Copied
</>
) : (
<>
<Copy className="size-4 mr-2" />
Copy
</>
)}
</Button>
<Button
variant="default"
size="sm"
onClick={downloadMarkdown}
disabled={!markdown}
>
<Download className="size-4 mr-2" />
Download .md
</Button>
</div>
</div>

<TabsContent value="preview" className="mt-0">
<div className="border rounded-lg p-6 bg-card max-h-[600px] overflow-auto">
<article className="prose prose-sm dark:prose-invert max-w-none">
<ReactMarkdown remarkPlugins={[remarkGfm]}>
{markdown}
</ReactMarkdown>
</article>
</div>
</TabsContent>

<TabsContent value="raw" className="mt-0">
<textarea
value={markdown}
readOnly
className={cn(
"w-full h-[600px] p-4 font-mono text-sm",
"border rounded-lg bg-card resize-none",
"focus:outline-none focus:ring-2 focus:ring-ring"
)}
/>
</TabsContent>
</Tabs>
</div>
)}

{/* Empty state after clearing or error */}
{file && !isConverting && !markdown && error && (
<div className="flex flex-col items-center justify-center py-12 gap-4">
<p className="text-destructive">{error}</p>
<Button variant="outline" onClick={clearFile}>
Try another file
</Button>
</div>
)}
</div>
);
}
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