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