Revert qrcreate/qrread removal

The impact wasn't too bad in retrospect

commands/general/qrcreate.js

@@ -0,0 +1,37 @@
+import qrcode from "qrcode";
+import { PassThrough } from "stream";
+import Command from "../../classes/command.js";
+
+class QrCreateCommand extends Command {
+  async run() {
+    if (this.args.length === 0) return "You need to provide some text to generate a QR code!";
+    this.client.sendChannelTyping(this.message.channel.id);
+    const writable = new PassThrough();
+    qrcode.toFileStream(writable, this.content, { margin: 1 });
+    const file = await this.streamToBuf(writable);
+    return {
+      file: file,
+      name: "qr.png"
+    };
+  }
+
+  streamToBuf(stream) {
+    return new Promise((resolve, reject) => {
+      const chunks = [];
+      stream.on("data", (chunk) => {
+        chunks.push(chunk);
+      });
+      stream.once("error", (error) => {
+        reject(error);
+      });
+      stream.once("end", () => {
+        resolve(Buffer.concat(chunks));
+      });
+    });
+  }
+
+  static description = "Generates a QR code";
+  static arguments = ["[text]"];
+}
+
+export default QrCreateCommand;

commands/general/qrread.js

@@ -0,0 +1,23 @@
+import jsqr from "jsqr";
+import fetch from "node-fetch";
+import sharp from "sharp";
+import { clean } from "../../utils/misc.js";
+import Command from "../../classes/command.js";
+import imageDetect from "../../utils/imagedetect.js";
+
+class QrReadCommand extends Command {
+  async run() {
+    const image = await imageDetect(this.client, this.message);
+    if (image === undefined) return "You need to provide an image with a QR code to read!";
+    this.client.sendChannelTyping(this.message.channel.id);
+    const data = await (await fetch(image.path)).buffer();
+    const rawData = await sharp(data).ensureAlpha().raw().toBuffer({ resolveWithObject: true });
+    const qrBuffer = jsqr(rawData.data, rawData.info.width, rawData.info.height);
+    if (!qrBuffer) return "I couldn't find a QR code!";
+    return `\`\`\`\n${await clean(qrBuffer.data)}\n\`\`\``;
+  }
+
+  static description = "Reads a QR code";
+}
+
+export default QrReadCommand;

package.json

@@ -33,10 +33,13 @@
     "eris-fleet": "github:esmBot/eris-fleet#master",
     "file-type": "^16.1.0",
     "format-duration": "^1.4.0",
+    "jsqr": "^1.3.1",
     "lavacord": "^1.1.9",
     "node-addon-api": "^4.2.0",
     "node-emoji": "^1.10.0",
     "node-fetch": "^3.1.0",
+    "qrcode": "^1.4.4",
+    "sharp": "^0.28.2",
     "winston": "^3.3.3"
   },
   "devDependencies": {