First version (Initial commit)

Author: cal-overflow

.gitignore

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+.DS_Store
+
+node_modules
+memories
+memories_history.json

.nvmrc

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+v17.1.0

README.md

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+# Download Snapchat Memories
+
+Have you ever wanted to stop using the social media platform, Snapchat, but you remember that you have hundreds or even thousands of photos and videos stored in your memories?
+
+This simple JavaScript application allows you to say goodbye to the service by downloading all of your memories to your computer (in regular `jpg` and `mp4` formats).
+
+### System requirements
+
+1. [NodeJS](http://nodejs.org) (v17.1.0)
+2. [npm](http://npmjs.com)
+3. [nvm](http://nvm.sh/)
+
+### Steps
+<!-- no toc -->
+1. [Download this program](#download-this-program)
+2. [Download your Snapchat data](#download-your-snapchat-data)
+3. [Copy your memory data into the program](#copy-your-memory-data-into-the-program)
+4. [Run the program](#run-the-program)
+5. Enjoy access to your memories!
+
+## Download this program
+
+In order to run the program, you must clone this repository onto your computer. [Learn more about cloning a repository](https://docs.github.com/en/repositories/creating-and-managing-repositories/cloning-a-repository#cloning-a-repository).
+
+Once the repository is cloned on your computer, navigate to the repository folder, `memory-download`.
+
+Ensure that you are using the correct version of `node` with `nvm`:
+
+```bash
+nvm use
+```
+
+Install the required node modules using `npm`:
+
+```bash
+npm i
+```
+
+## Download your Snapchat data
+
+Snapchat makes downloading your data very simple!
+
+1. Sign into your Snapchat account at [accounts.snapchat.com](https://accounts.snapchat.com/)
+2. Click **My Data**
+3. Click **Submit Request** at the bottom of the page
+4. Wait for an email from Snapchat with a link to your data archive. (This may take as long as a day)
+5. Follow the link found in your email and follow the given instructions to download your data.
+
+For additional help, view the official [Download My Data](https://support.snapchat.com/en-US/a/download-my-data) Snapchat support page.
+
+## Copy your memory data into the program
+
+Find the file `memories_history.json` from within the zip file downloaded from the last step. Copy or move this file to the `memory-download` folder.
+
+## Run the program
+
+
+Start the program with `npm`:
+
+```bash
+npm start
+```
+
+Wait for the program to terminate. You will now find a copy of your memories in the folder `memory-download/memories/`.

app.js

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+import fetch from 'node-fetch';
+import fs from 'fs';
+
+const inputFile = './memories_history.json';
+const outputDirectory = './memories';
+
+if (!fs.existsSync(inputFile))
+  throw new Error(`JSON file "${inputFile}" not found`);
+
+if (!fs.existsSync(outputDirectory))
+  fs.mkdirSync(outputDirectory);
+
+const data = JSON.parse(fs.readFileSync(inputFile));
+const memories = data["Saved Media"].reverse();
+
+const getFileName = async (memory) => {
+  const extension = memory['Media Type'] === 'PHOTO' ? 'jpg' : 'mp4';
+  const filename = memory['Date'].substr(0, 10);
+
+  let i = 1;
+  let confirmedFilename = filename;
+  while (fs.existsSync(`${outputDirectory}/${confirmedFilename}.${extension}`)) {
+    confirmedFilename = `${filename}(${i++})`;
+  }
+
+  return `${outputDirectory}/${confirmedFilename}.${extension}`;
+};
+
+console.log("Downloading your memories. This will probably take a while...");
+
+for (const memory of memories) {
+  await fetch((memory['Download Link']), {
+    method: 'POST'
+  })
+  .then(async (res) => {
+    const url = await res.text();
+  
+    // download file from url
+    const download = await fetch(url);
+    const fileStream = fs.createWriteStream(await getFileName(memory));
+
+    await new Promise((resolve, reject) => {
+      download.body.pipe(fileStream);
+      download.body.on("error", reject);
+      fileStream.on("finish", resolve);
+    });
+  });
+}
+
+console.log(`Memories downloaded successfully!\nYour memories are stored in ${outputDirectory}`);

package-lock.json

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+{
+  "name": "memory-download",
+  "version": "1.0.0",
+  "scripts": {
+    "start": "node app.js"
+  },
+  "dependencies": {
+    "fs": "^0.0.1-security",
+    "node-fetch": "^3.1.0"
+  },
+  "type": "module"
+}