ストーキング実装

Closes #1511

migration/2018-04-19.js

@@ -0,0 +1,49 @@
+// for Node.js interpret
+
+const { default: User } = require('../built/models/user');
+const { default: Following } = require('../built/models/following');
+const { default: zip } = require('@prezzemolo/zip')
+
+const migrate = async (following) => {
+	const follower = await User.findOne({ _id: following.followerId });
+	const followee = await User.findOne({ _id: following.followeeId });
+	const result = await Following.update(following._id, {
+		$set: {
+			stalk: true,
+			_follower: {
+				host: follower.host,
+				inbox: follower.host != null ? follower.inbox : undefined
+			},
+			_followee: {
+				host: followee.host,
+				inbox: followee.host != null ? followee.inbox : undefined
+			}
+		}
+	});
+	return result.ok === 1;
+}
+
+async function main() {
+	const count = await Following.count({});
+
+	const dop = Number.parseInt(process.argv[2]) || 5
+	const idop = ((count - (count % dop)) / dop) + 1
+
+	return zip(
+		1,
+		async (time) => {
+			console.log(`${time} / ${idop}`)
+			const doc = await Following.find({}, {
+				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)