#986

tools/migration/node.2017-12-11.js

@@ -0,0 +1,67 @@
+// for Node.js interpret
+
+const { default: DriveFile, getGridFSBucket } = require('../../built/api/models/drive-file')
+const { default: zip } = require('@prezzemolo/zip')
+
+const _gm = require('gm');
+const gm = _gm.subClass({
+	imageMagick: true
+});
+
+const migrate = doc => new Promise(async (res, rej) => {
+	const bucket = await getGridFSBucket();
+
+	const readable = bucket.openDownloadStream(doc._id);
+
+	gm(readable)
+		.setFormat('ppm')
+		.resize(1, 1)
+		.toBuffer(async (err, buffer) => {
+			if (err) rej(err);
+			const r = buffer.readUInt8(buffer.length - 3);
+			const g = buffer.readUInt8(buffer.length - 2);
+			const b = buffer.readUInt8(buffer.length - 1);
+
+			const result = await DriveFile.update(doc._id, {
+				$set: {
+					'metadata.properties.average_color': [r, g, b]
+				}
+			})
+
+			res(result.ok === 1);
+		});
+});
+
+async function main() {
+	const query = {
+		contentType: {
+			$in: [
+				'image/png',
+				'image/jpeg'
+			]
+		}
+	}
+
+	const count = await DriveFile.count(query);
+
+	const dop = Number.parseInt(process.argv[2]) || 5
+	const idop = ((count - (count % dop)) / dop) + 1
+
+	return zip(
+		1,
+		async (time) => {
+			console.log(`${time} / ${idop}`)
+			const doc = await DriveFile.find(query, {
+				limit: dop, skip: time * dop
+			})
+			return Promise.all(doc.map(migrate))
+		},
+		idop
+	).then(a => {
+		const rv = []
+		a.forEach(e => rv.push(...e))
+		return rv
+	})
+}
+
+main().then(console.dir).catch(console.error)