feat: migration of old topic thumbs to new format

closes #9099

src/upgrades/1.16.0/migrate_thumbs.js

@@ -0,0 +1,40 @@
+'use strict';
+
+const nconf = require('nconf');
+
+const db = require('../../database');
+const meta = require('../../meta');
+const topics = require('../../topics');
+const batch = require('../../batch');
+
+module.exports = {
+	name: 'Migrate existing topic thumbnails to new format',
+	timestamp: Date.UTC(2020, 11, 11),
+	method: async function () {
+		const progress = this.progress;
+		const current = await meta.configs.get('topicThumbSize');
+
+		if (parseInt(current, 10) === 120) {
+			await meta.configs.set('topicThumbSize', 512);
+		}
+		await meta.configs.set('allowTopicsThumbnail', 1);
+
+		await batch.processSortedSet('topics:tid', async function (tids) {
+			const keys = tids.map(tid => `topic:${tid}`);
+			const topicThumbs = (await db.getObjectsFields(keys, ['thumb'])).map(obj => (obj.thumb ? obj.thumb.replace(nconf.get('upload_url'), '') : null));
+
+			await Promise.all(tids.map(async (tid, idx) => {
+				const path = topicThumbs[idx];
+				if (path) {
+					await topics.thumbs.associate({ id: tid, path });
+					await db.deleteObjectField(keys[idx], 'thumb');
+				}
+
+				progress.incr();
+			}));
+		}, {
+			batch: 500,
+			progress: progress,
+		});
+	},
+};

src/upgrades/1.16.0/topic_thumbs_settings.js

@@ -1,16 +0,0 @@
-'use strict';
-
-const meta = require('../../meta');
-
-module.exports = {
-	name: 'Config changes for new topic thumbnails',
-	timestamp: Date.UTC(2020, 11, 8),
-	method: async () => {
-		const current = await meta.configs.get('topicThumbSize');
-
-		if (parseInt(current, 10) === 120) {
-			await meta.configs.set('topicThumbSize', 512);
-		}
-		await meta.configs.set('allowTopicsThumbnail', 1);
-	},
-};