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30 lines
1.1 KiB
CoffeeScript
30 lines
1.1 KiB
CoffeeScript
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PngCrush = require('pngcrush')
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fs = require("fs")
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logger = require("logger-sharelatex")
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module.exports =
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compressPng: (localPath, callback)->
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optimisedPath = "#{localPath}-optimised"
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startTime = new Date()
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logger.log localPath:localPath, optimisedPath:optimisedPath, "optimising png path"
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readStream = fs.createReadStream(localPath)
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writeStream = fs.createWriteStream(optimisedPath)
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readStream.on "error", (err)->
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logger.err err:err, localPath:localPath, "something went wrong getting read stream for compressPng"
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callback(err)
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writeStream.on "error", (err)->
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logger.err err:err, localPath:localPath, "something went wrong getting write stream for compressPng"
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callback(err)
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myCrusher = new PngCrush()
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myCrusher.on "error", (err)->
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logger.err err:err, localPath:localPath, "error compressing file"
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callback err
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readStream.pipe(myCrusher).pipe(writeStream)
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writeStream.on "finish", ->
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timeTaken = new Date() - startTime
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logger.log localPath:localPath, timeTaken:timeTaken, "finished converting file"
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fs.rename optimisedPath, localPath, callback
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