feat: #10018 , wip

public/language/en-GB/topic.json

@@ -52,6 +52,7 @@
 	"moved-from-by": "Moved from %1 by",
 	"queued-by": "Post queued for approval →",
 	"backlink": "Referenced by",
+	"forked-by": "Forked by",
 
 	"bookmark_instructions" : "Click here to return to the last read post in this thread.",
 

src/topics/events.js

@@ -58,6 +58,10 @@ Events._types = {
 		icon: 'fa-link',
 		text: '[[topic:backlink]]',
 	},
+	fork: {
+		icon: 'fa-code-fork',
+		text: '[[topic:forked-by]]'
+	},
 };
 
 Events.init = async () => {

src/topics/fork.js

@@ -70,6 +70,7 @@ module.exports = function (Topics) {
 				downvotes: postData.downvotes,
 			}),
 			db.sortedSetsAdd(['topics:votes', `cid:${cid}:tids:votes`], postData.votes, tid),
+			Topics.events.log(fromTid, { type: 'fork', uid })
 		]);
 
 		plugins.hooks.fire('action:topic.fork', { tid: tid, fromTid: fromTid, uid: uid });