mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-07 20:31:06 -05:00
44 lines
1.4 KiB
CoffeeScript
44 lines
1.4 KiB
CoffeeScript
Keys = require('./UpdateKeys')
|
|
RedisManager = require "./RedisManager"
|
|
Errors = require "./Errors"
|
|
|
|
module.exports = class ShareJsDB
|
|
constructor: (@project_id, @doc_id, @lines, @version) ->
|
|
@appliedOps = {}
|
|
# ShareJS calls this detacted from the instance, so we need
|
|
# bind it to keep our context that can access @appliedOps
|
|
@writeOp = @_writeOp.bind(@)
|
|
|
|
getOps: (doc_key, start, end, callback) ->
|
|
if start == end
|
|
return callback null, []
|
|
|
|
# In redis, lrange values are inclusive.
|
|
if end?
|
|
end--
|
|
else
|
|
end = -1
|
|
|
|
[project_id, doc_id] = Keys.splitProjectIdAndDocId(doc_key)
|
|
RedisManager.getPreviousDocOps doc_id, start, end, callback
|
|
|
|
_writeOp: (doc_key, opData, callback) ->
|
|
@appliedOps[doc_key] ?= []
|
|
@appliedOps[doc_key].push opData
|
|
callback()
|
|
|
|
getSnapshot: (doc_key, callback) ->
|
|
if doc_key != Keys.combineProjectIdAndDocId(@project_id, @doc_id)
|
|
return callback(new Errors.NotFoundError("unexpected doc_key #{doc_key}, expected #{Keys.combineProjectIdAndDocId(@project_id, @doc_id)}"))
|
|
else
|
|
return callback null, {
|
|
snapshot: @lines.join("\n")
|
|
v: parseInt(@version, 10)
|
|
type: "text"
|
|
}
|
|
|
|
# To be able to remove a doc from the ShareJS memory
|
|
# we need to called Model::delete, which calls this
|
|
# method on the database. However, we will handle removing
|
|
# it from Redis ourselves
|
|
delete: (docName, dbMeta, callback) -> callback()
|