From b507c8e1bb3c64f8f9129943211b8fe8894c852a Mon Sep 17 00:00:00 2001
From: Eric Mc Sween <5454374+emcsween@users.noreply.github.com>
Date: Mon, 17 Feb 2025 07:43:08 -0500
Subject: [PATCH] Merge pull request #23612 from
 overleaf/em-find-dangling-comments

Add script to find projects with dangling comments

GitOrigin-RevId: 31048defa2f33c2bf23d14ddc643366775df3104
---
 .../web/scripts/find_dangling_comments.mjs    | 125 ++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 services/web/scripts/find_dangling_comments.mjs

diff --git a/services/web/scripts/find_dangling_comments.mjs b/services/web/scripts/find_dangling_comments.mjs
new file mode 100644
index 0000000000..5d13c67970
--- /dev/null
+++ b/services/web/scripts/find_dangling_comments.mjs
@@ -0,0 +1,125 @@
+// @ts-check
+
+import minimist from 'minimist'
+import {
+  db,
+  ObjectId,
+  READ_PREFERENCE_SECONDARY,
+} from '../app/src/infrastructure/mongodb.js'
+
+const OPTS = parseArgs()
+
+function parseArgs() {
+  const args = minimist(process.argv.slice(2), {
+    string: ['min-project-id', 'max-project-id'],
+    boolean: ['help'],
+  })
+
+  if (args.help) {
+    usage()
+    process.exit(0)
+  }
+
+  return {
+    minProjectId: args['min-project-id'] ?? null,
+    maxProjectId: args['max-project-id'] ?? null,
+  }
+}
+
+function usage() {
+  console.log(`Usage: find_dangling_comments.mjs [OPTS]
+
+Options:
+
+    --min-project-id    Start scanning at this project id
+    --max-project-id    Stop scanning at this project id`)
+}
+
+async function main() {
+  let projectsProcessed = 0
+  let projectsFound = 0
+  for await (const { projectId, threadIds } of fetchThreadIdsByProject()) {
+    projectsProcessed += 1
+    const danglingThreadIds = await findDanglingThreadIds(projectId, threadIds)
+    if (danglingThreadIds.length > 0) {
+      console.log(
+        `Project ${projectId} has dangling threads: ${danglingThreadIds.join(', ')}`
+      )
+      projectsFound += 1
+    }
+    if (projectsProcessed % 100000 === 0) {
+      console.log(
+        `${projectsProcessed} projects processed - Last project: ${projectId}`
+      )
+    }
+  }
+  console.log(`${projectsFound} projects with dangling comments found`)
+}
+
+async function* fetchThreadIdsByProject() {
+  const clauses = []
+  clauses.push({
+    deleted: { $ne: true },
+    'ranges.comments.0': { $exists: true },
+  })
+  if (OPTS.minProjectId != null) {
+    clauses.push({ project_id: { $gte: new ObjectId(OPTS.minProjectId) } })
+  }
+  if (OPTS.maxProjectId != null) {
+    clauses.push({ project_id: { $lte: new ObjectId(OPTS.maxProjectId) } })
+  }
+  const docs = db.docs.find(
+    { $and: clauses },
+    {
+      sort: { project_id: 1 },
+      projection: { project_id: 1, 'ranges.comments': 1 },
+      readPreference: READ_PREFERENCE_SECONDARY,
+    }
+  )
+  let projectId
+  let threadIds = new Set()
+  for await (const doc of docs) {
+    if (projectId !== doc.project_id) {
+      yield { projectId, threadIds }
+      projectId = doc.project_id
+      threadIds = new Set()
+    }
+
+    projectId = doc.project_id
+
+    for (const comment of doc.ranges.comments) {
+      threadIds.add(comment.op.t.toString())
+    }
+  }
+  yield { projectId, threadIds }
+} /**
+ * @param {string} projectId
+ * @param {Set<string>} threadIds
+ */
+async function findDanglingThreadIds(projectId, threadIds) {
+  const rooms = await db.rooms.find(
+    { project_id: projectId, thread_id: { $exists: true } },
+    { readPreference: READ_PREFERENCE_SECONDARY }
+  )
+  const existingThreadIds = new Set()
+  for await (const room of rooms) {
+    existingThreadIds.add(room.thread_id.toString())
+  }
+
+  const danglingThreadIds = []
+  for (const threadId of threadIds) {
+    if (!existingThreadIds.has(threadId)) {
+      danglingThreadIds.push(threadId)
+    }
+  }
+
+  return danglingThreadIds
+}
+
+try {
+  await main()
+  process.exit(0)
+} catch (err) {
+  console.error(err)
+  process.exit(1)
+}