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48 lines
2.1 KiB
CoffeeScript
48 lines
2.1 KiB
CoffeeScript
AnalyticsString = require '../analytics/AnalyticsString'
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log = require 'winston'
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mongoose = require 'mongoose'
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module.exports =
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isID: (id) -> _.isString(id) and id.length is 24 and id.match(/[a-f0-9]/gi)?.length is 24
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objectIdFromTimestamp: (timestamp) ->
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# mongoDB ObjectId contains creation date in first 4 bytes
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# So, it can be used instead of a redundant created field
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# http://docs.mongodb.org/manual/reference/object-id/
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# http://stackoverflow.com/questions/8749971/can-i-query-mongodb-objectid-by-date
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# Convert string date to Date object (otherwise assume timestamp is a date)
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timestamp = new Date(timestamp) if typeof(timestamp) == 'string'
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# Convert date object to hex seconds since Unix epoch
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hexSeconds = Math.floor(timestamp/1000).toString(16)
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# Create an ObjectId with that hex timestamp
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mongoose.Types.ObjectId(hexSeconds + "0000000000000000")
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getAnalyticsStringID: (str, callback) ->
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unless str?
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log.error "getAnalyticsStringID given invalid str param"
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return callback -1
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@analyticsStringCache ?= {}
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return callback @analyticsStringCache[str] if @analyticsStringCache[str]
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insertString = =>
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# http://docs.mongodb.org/manual/tutorial/create-an-auto-incrementing-field/#auto-increment-optimistic-loop
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AnalyticsString.find({}, {_id: 1}).sort({_id: -1}).limit(1).exec (err, documents) =>
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if err?
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log.error "Failed to find next analytics string _id for #{str}"
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return callback -1
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seq = if documents.length > 0 then documents[0]._id + 1 else 1
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doc = new AnalyticsString _id: seq, v: str
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doc.save (err) =>
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if err?
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log.error "Failed to save analytics string ID for #{str}"
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return callback -1
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@analyticsStringCache[str] = seq
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callback seq
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# Find existing string
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AnalyticsString.findOne(v: str).exec (err, document) =>
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if err?
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log.error "Failed to lookup analytics string #{str}"
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return callback -1
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if document
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@analyticsStringCache[str] = document._id
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return callback @analyticsStringCache[str]
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insertString()
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