Docs/pdf to image (#1330)

* Added pdf-to-image example

* Copy tweak

* Squashed commit of the following:

commit 64862db
Author: Niels <info@flydev.nl>
Date:   Thu Sep 19 16:25:17 2024 +0200

    Update dotEnv.ts to ignore OTEL_EXPORTER_OTLP_ENDPOINT as well (#1307)

    * Update dotEnv.ts

    * Create four-buttons-run.md

    ---------

    Co-authored-by: Eric Allam <eallam@icloud.com>

commit c65d482
Author: Thibaut Cuchet <thibautcuchet@gmail.com>
Date:   Thu Sep 19 16:22:57 2024 +0200

    Feat: Extension puppeteer (#1323)

    * feat: add puppeteer extension

    * chore: update package and config

    * feat: add puppeteer task

    * Create little-donkeys-protect.md

    ---------

    Co-authored-by: Eric Allam <eallam@icloud.com>

commit b4be736
Author: Eric Allam <eallam@icloud.com>
Date:   Thu Sep 19 15:21:03 2024 +0100

    prismaExtension fixes for #1325 and #1327

* Copy tweak

Author: samejr

docs/examples/intro.mdx

@@ -9,6 +9,7 @@ description: "Learn how to use Trigger.dev with these practical task examples."
 | [DALL·E 3 image generation](/examples/dall-e3-generate-image) | Use OpenAI's GPT-4o and DALL·E 3 to generate an image and text.             |
 | [FFmpeg video processing](/examples/ffmpeg-video-processing)  | Use FFmpeg to process a video in various ways and save it to Cloudflare R2. |
 | [OpenAI with retrying](/examples/open-ai-with-retrying)       | Create a reusable OpenAI task with custom retry options.                    |
+| [PDF to image](/examples/pdf-to-image)                        | Use `MuPDF` to turn a PDF into images and save them to Cloudflare R2.       |
 | [React to PDF](/examples/react-pdf)                           | Use `react-pdf` to generate a PDF and save it to Cloudflare R2.             |
 | [Resend email sequence](/examples/resend-email-sequence)      | Send a sequence of emails over several days using Resend with Trigger.dev.  |
 | [Sharp image processing](/examples/sharp-image-processing)    | Use Sharp to process an image and save it to Cloudflare R2.                 |

docs/examples/pdf-to-image.mdx

@@ -0,0 +1,84 @@
+---
+title: "Turn a PDF into an image using MuPDF"
+sidebarTitle: "PDF to image"
+description: "This example will show you how to turn a PDF into an image using MuPDF and Trigger.dev."
+---
+
+## Overview
+
+This example demonstrates how to use Trigger.dev to turn a PDF into a series of images using MuPDF and upload them to Cloudflare R2.
+
+## Task code
+
+```ts trigger/pdfToImage.ts
+import { logger, task } from "@trigger.dev/sdk/v3";
+import { PutObjectCommand, S3Client } from "@aws-sdk/client-s3";
+import { execSync } from "child_process";
+import fs from "fs";
+import path from "path";
+
+// Initialize S3 client
+const s3Client = new S3Client({
+  region: "auto",
+  endpoint: process.env.S3_ENDPOINT,
+  credentials: {
+    accessKeyId: process.env.R2_ACCESS_KEY_ID ?? "",
+    secretAccessKey: process.env.R2_SECRET_ACCESS_KEY ?? "",
+  },
+});
+
+export const pdfToImage = task({
+  id: "pdf-to-image",
+  run: async (payload: { pdfUrl: string; documentId: string }) => {
+    logger.log("Converting PDF to images", payload);
+
+    const pdfPath = `/tmp/${payload.documentId}.pdf`;
+    const outputDir = `/tmp/${payload.documentId}`;
+
+    // Download PDF and convert to images using MuPDF
+    execSync(`curl -s -o ${pdfPath} ${payload.pdfUrl}`);
+    fs.mkdirSync(outputDir, { recursive: true });
+    execSync(`mutool convert -o ${outputDir}/page-%d.png ${pdfPath}`);
+
+    // Upload images to R2
+    const uploadedUrls = [];
+    for (const file of fs.readdirSync(outputDir)) {
+      const s3Key = `images/${payload.documentId}/${file}`;
+      const uploadParams = {
+        Bucket: process.env.S3_BUCKET,
+        Key: s3Key,
+        Body: fs.readFileSync(path.join(outputDir, file)),
+        ContentType: "image/png",
+      };
+
+      logger.log("Uploading to R2", uploadParams);
+
+      await s3Client.send(new PutObjectCommand(uploadParams));
+      const s3Url = `https://${process.env.S3_BUCKET}.r2.cloudflarestorage.com/${s3Key}`;
+      uploadedUrls.push(s3Url);
+      logger.log("Image uploaded to R2", { url: s3Url });
+    }
+
+    // Clean up
+    fs.rmSync(outputDir, { recursive: true, force: true });
+    fs.unlinkSync(pdfPath);
+
+    logger.log("All images uploaded to R2", { urls: uploadedUrls });
+
+    return {
+      imageUrls: uploadedUrls,
+    };
+  },
+});
+```
+
+## Testing your task
+
+To test this task in the dashboard, you can use the following payload:
+
+```json
+{
+  "pdfUrl": "https://pdfobject.com/pdf/sample.pdf",
+  "documentId": "unique-document-id"
+}
+```

docs/mint.json

@@ -277,6 +277,7 @@
         "examples/dall-e3-generate-image",
         "examples/ffmpeg-video-processing",
         "examples/open-ai-with-retrying",
+        "examples/pdf-to-image",
         "examples/sharp-image-processing",
         "examples/react-pdf",
         "examples/resend-email-sequence",