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43 lines
1.7 KiB
CoffeeScript
43 lines
1.7 KiB
CoffeeScript
Settings = require "settings-sharelatex"
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redis = require("redis-sharelatex")
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rclient = redis.createClient(Settings.redis.web)
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rawUpdatesKey = (doc_id) -> "UncompressedHistoryOps:#{doc_id}"
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docsWithHistoryOpsKey = (project_id) -> "DocsWithHistoryOps:#{project_id}"
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module.exports = RedisManager =
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getOldestDocUpdates: (doc_id, batchSize, callback = (error, jsonUpdates) ->) ->
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key = rawUpdatesKey(doc_id)
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rclient.lrange key, 0, batchSize - 1, callback
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expandDocUpdates: (jsonUpdates, callback = (error, rawUpdates) ->) ->
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try
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rawUpdates = ( JSON.parse(update) for update in jsonUpdates or [] )
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catch e
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return callback(e)
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callback null, rawUpdates
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deleteAppliedDocUpdates: (project_id, doc_id, docUpdates, callback = (error) ->) ->
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multi = rclient.multi()
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# Delete all the updates which have been applied (exact match)
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for update in docUpdates or []
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multi.lrem rawUpdatesKey(doc_id), 0, update
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# It's ok to delete the doc_id from the set here. Even though the list
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# of updates may not be empty, we will continue to process it until it is.
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multi.srem docsWithHistoryOpsKey(project_id), doc_id
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multi.exec (error, results) ->
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return callback(error) if error?
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callback null
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getDocIdsWithHistoryOps: (project_id, callback = (error, doc_ids) ->) ->
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rclient.smembers docsWithHistoryOpsKey(project_id), callback
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# this will only work on single node redis, not redis cluster
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getProjectIdsWithHistoryOps: (callback = (error, project_ids) ->) ->
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rclient.keys docsWithHistoryOpsKey("*"), (error, project_keys) ->
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return callback(error) if error?
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project_ids = for key in project_keys
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[prefix, project_id] = key.split(":")
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project_id
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callback(error, project_ids)
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