overleaf/services/document-updater/app/coffee/SnapshotManager.coffee
2019-04-16 11:05:17 +01:00

42 lines
1.4 KiB
CoffeeScript

{db, ObjectId} = require "./mongojs"
module.exports = SnapshotManager =
recordSnapshot: (project_id, doc_id, version, pathname, lines, ranges, callback) ->
try
project_id = ObjectId(project_id)
doc_id = ObjectId(doc_id)
catch error
return callback(error)
db.docSnapshots.insert {
project_id, doc_id, version, lines, pathname,
ranges: SnapshotManager.jsonRangesToMongo(ranges),
ts: new Date()
}, callback
# Suggested indexes:
# db.docSnapshots.createIndex({project_id:1, doc_id:1})
# db.docSnapshots.createIndex({ts:1},{expiresAfterSeconds: 30*24*3600)) # expires after 30 days
jsonRangesToMongo: (ranges) ->
return null if !ranges?
updateMetadata = (metadata) ->
if metadata?.ts?
metadata.ts = new Date(metadata.ts)
if metadata?.user_id?
metadata.user_id = SnapshotManager._safeObjectId(metadata.user_id)
for change in ranges.changes or []
change.id = SnapshotManager._safeObjectId(change.id)
updateMetadata(change.metadata)
for comment in ranges.comments or []
comment.id = SnapshotManager._safeObjectId(comment.id)
if comment.op?.t?
comment.op.t = SnapshotManager._safeObjectId(comment.op.t)
updateMetadata(comment.metadata)
return ranges
_safeObjectId: (data) ->
try
return ObjectId(data)
catch error
return data