overleaf/services/filestore/app/coffee/FileConverter.coffee

47 lines
1.5 KiB
CoffeeScript

easyimage = require("easyimage")
_ = require("underscore")
metrics = require("./metrics")
logger = require("logger-sharelatex")
exec = require('child_process').exec
approvedFormats = ["png"]
module.exports =
convert: (sourcePath, requestedFormat, callback)->
logger.log sourcePath:sourcePath, requestedFormat:requestedFormat, "converting file format"
timer = new metrics.Timer("imageConvert")
destPath = "#{sourcePath}.#{requestedFormat}"
sourcePath = "#{sourcePath}[0]"
if !_.include approvedFormats, requestedFormat
err = new Error("invalid format requested")
return callback err
args = "nice convert -flatten -density 300 #{sourcePath} #{destPath}"
exec args, (err, stdout, stderr)->
timer.done()
callback(err, destPath)
thumbnail: (sourcePath, callback)->
logger.log sourcePath:sourcePath, "thumbnail convert file"
destPath = "#{sourcePath}.png"
sourcePath = "#{sourcePath}[0]"
args =
src: sourcePath
dst: destPath
width: 424
height: 300
args = "nice convert -flatten -background white -resize 300x -density 300 #{sourcePath} #{destPath}"
exec args, (err, stdout, stderr)->
callback(err, destPath)
preview: (sourcePath, callback)->
logger.log sourcePath:sourcePath, "preview convert file"
destPath = "#{sourcePath}.png"
sourcePath = "#{sourcePath}[0]"
args =
src: sourcePath
dst: destPath
width: 600
height: 849
args = "nice convert -flatten -background white -resize 600x -density 300 #{sourcePath} #{destPath}"
exec args, (err, stdout, stderr)->
callback(err, destPath)