gistfile1.coffee

#an example of using zlib to decompress a return from stackoverflow's api
#written in coffeescript and nodejs

zlib = require 'zlib'
http = require 'http'

module.exports = (robot) ->

    robot.respond /(stack|ss) ?(find:.*) ?(tags:.*)/i, (msg)->
        
        query = msg.match[2]
        query2 = msg.match[3]
        
        query = query.replace /find:/i, ""
        query2 = query2.replace /tags:/i, ""
        
        query = encodeURIComponent query
        query2 = encodeURIComponent query2
        
        
        if query.length == 0
            stackscript msg, "/1.1/searchtagged=jquery&order=desc&sort=votes"
        else
            stackscript msg, "/1.1/search?tagged=#{query2}&intitle=#{query}&order=desc&sort=votes"
        
    stackscript = (msg, url) ->
        
        request = http.get(
            host: "api.stackoverflow.com"
            port: 80
            path: url
            headers: 'accept-encoding': 'gzip'
        ) 
        request.on "response", (response) ->
            switch response.headers["content-encoding"]
                when "gzip"
                    
                    content = ""
                    gunzip = zlib.createGunzip()

                    response.pipe(gunzip)

                    gunzip.on 'data', (chunk) ->
                        content += chunk

                    gunzip.on 'end', () ->
                        returnData = JSON.parse(content)
                        for data in returnData.questions[0...5]
                            msg.send "\n#{data.title} \n Score #{data.score} \n URL: http://stackoverflow.com#{data.question_answers_url} \n"