2015-01-14 14:09:01 -05:00
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mongoose = require 'mongoose'
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2014-08-14 10:38:50 -04:00
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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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2015-01-14 14:09:01 -05:00
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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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