Add slackbot guppy example (#342)

* Add slackbot guppy example

* Add json dependence to slackbot Gemfile

examples/slackbot/guppy/Gemfile

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+source 'https://rubygems.org'
+
+gem 'httparty', '~> 0.14.0'
+gem 'slack_webhooks'
+gem 'json', '> 1.8.2'

examples/slackbot/guppy/README.md

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+## Quick Example for a SlackBot command in Ruby
+
+This example will show you how to test and deploy a SlackBot command to IronFunctions.
+
+```sh
+# create your func.yaml file
+fn init <YOUR_DOCKERHUB_USERNAME>/guppy
+# install dependencies, we need the json gem to run this
+docker run --rm -v "$PWD":/worker -w /worker iron/ruby:dev bundle install --standalone --clean
+# build the function
+fn build
+# test it
+cat slack.payload | fn run
+# push it to Docker Hub for use with IronFunctions
+fn push
+# Create a route to this function on IronFunctions
+fn routes create slackbot /guppy
+# Change the route response header content-type to application/json
+curl -X PUT http://127.0.0.1:8080/v1/apps/slackbot/routes/guppy -d '{ "route": { "headers": { "Content-type": ["application/json"] } } }'
+```
+
+## Create a Slash Command integration in Slack
+
+In Slack, go to Integrations, find Slash Commands, click Add, type in / as the command then click Add again. On the next page, take the IronFunctions route URL and paste it into the URL field then click Save Integration.
+
+If running in localhost, use [ngrok](https://github.com/inconshreveable/ngrok).
+
+# Try it out!
+
+In slack, type /<COMMAND> [options] and you'll see the magic!
+
+

examples/slackbot/guppy/commands.json

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+{
+  "tableflip": {"image_url": "http://i.imgur.com/oGwPRux.png"},
+  "shrug": {"image_url": "http://www.theblaze.com/wp-content/uploads/2015/03/Google-comment-gif.gif"},
+  "forlorn": {"image_url": "https://lh4.googleusercontent.com/-Jp85Ek_5jJc/UdEYqhHzuLI/AAAAAAACF3s/U708yywLDCQ/w700-h412-no/forlorn%2Bcat.gif"},
+  "beardscratch": {"image_url": "https://lh5.googleusercontent.com/-gfUwQSvd1bs/UjjHeU-b6HI/AAAAAAAC81o/xtMpBn1F87E/w958-h539-no/beardman.gif"},
+  "atlast": {"image_url": "https://lh4.googleusercontent.com/-jzywmNWCPps/UdEYqnq2ECI/AAAAAAACF3w/eNnS_KXHzN0/w480-h226-no/morpheus-at-last.gif"},
+  "ohyeah": {"image_url": "https://lh4.googleusercontent.com/-IqiWUKEzd_U/UnmdxBZp-bI/AAAAAAADFf4/l7dyXzMTdDs/w245-h285-no/code-05.gif"},
+  "facepalm": {"image_url": "https://lh4.googleusercontent.com/-kbD1OZrG7kI/UnmdupWzP1I/AAAAAAADFfg/g3SXEo1JXIs/s300-no/cQEBX.gif"},
+  "peak": {"image_url": "https://lh4.googleusercontent.com/-V9zKyTXHrD4/Unmdzpnb1UI/AAAAAAADFgc/-61luVxML_M/w500-h320-no/efuITnY.gif"},
+  "right": {"image_url": "https://lh6.googleusercontent.com/-vPkV8r6Mhy0/UnmdtC490bI/AAAAAAADFfM/Hil5QyuTX78/w500-h221-no/HuVXfMb.gif"},
+  "sup": {"image_url": "https://lh3.googleusercontent.com/-iqoKtA72rIo/Unmd7o17ZUI/AAAAAAADFhM/7-MLxTAXU7Q/w470-h248-no/yC5BsCS.gif"},
+  "nod": {"image_url": "https://lh4.googleusercontent.com/-byviKRrwH5c/Unny4gWkMqI/AAAAAAADFkc/OckIZqXDCY4/w500-h225-no/iPOS6.gif"},
+  "thumbsup": {"image_url": "https://lh4.googleusercontent.com/-1l8KOia5vis/Unny3Jw851I/AAAAAAADFkY/bRLzh5VyPbc/w312-h176-no/ZCGrZ.gif"},
+  "dance1": {"image_url": "https://lh5.googleusercontent.com/-5sN8WVo6Myc/Unny6ZsWZGI/AAAAAAADFk8/JssUbaDRG_M/w250-h303-no/mbjD3.gif"},
+  "dance2": {"image_url": "https://lh5.googleusercontent.com/-2aPDr_v7Jgc/Unny3pXSfvI/AAAAAAADFkI/KyloHLe5DaM/w400-h234-no/gary.gif"},
+  "dance3": {"image_url": "https://lh5.googleusercontent.com/-rqM2JLfd2xg/Unny2Pvpy1I/AAAAAAADFjY/Zx6D93XEws4/w480-h340-no/1tumblr_lgp6q5NhE21qcjtu8o1_500.gif"},
+  "sidepunch": {"image_url": "https://lh6.googleusercontent.com/-HZYoVvXWc_s/UnmfpjqTbiI/AAAAAAADFic/q3dGlwfxV2w/w500-h247-no/code-27.gif"},
+  "tyrionbird": {"image_url": "https://lh5.googleusercontent.com/-6frbpEP6M3g/Unmfl9i3fcI/AAAAAAADFh8/SOpKxwyOk3k/w300-h149-no/code-19.gif"},
+  "obiwan": {"image_url": "http://i.giphy.com/2vERRTu559XQk.gif"},
+  "wat": {"image_url": "http://i.giphy.com/qxtxlL4sFFle.gif"},
+  "ivan": {"image_url": "http://i.giphy.com/2OMHmoFMiJjfq.gif"},
+  "freakout": {"image_url": "http://i.giphy.com/FwpecpDvcu7vO.gif"},
+  "boom-chuck": {"image_url": "http://i.giphy.com/10PkQyXWagNrqg.gif"},
+  "boom-drake": {"image_url": "http://i.giphy.com/8vW915bv0DqXC.gif"},
+  "boom-dany": {"image_url": "http://i.giphy.com/LrN9NbJNp9SWQ.gif"},
+  "boom-moon": {"image_url": "http://i.giphy.com/ydMNTWYVjSEFi.gif"},
+  "boom-franco": {"image_url": "http://i.giphy.com/b3u8anVaWFQ9G.gif"},
+  "boom-starcraft": {"image_url": "http://i.giphy.com/5xtDarxQ05ee2ktRA5i.gif"},
+  "boom-anime": {"image_url": "http://i.giphy.com/fMNNDKtOVbxSM.gif"},
+  "boom-denzel":{"image_url":"http://i.imgur.com/1LXMDns.gif"},
+  "boom-ump":{"image_url":"http://cdn0.sbnation.com/imported_assets/1160455/umpboom.gif"},
+  "fun": {"image_url": "http://s-ak.buzzfed.com/static/imagebuzz/web04/2011/3/14/10/anigif_fun-fun-fun-29834-1300112565-20.gif"},
+  "fthis": {"image_url": "http://i.giphy.com/iICCUuGJOhOnK.gif"},
+  "disappear": {"image_url": "http://i.giphy.com/4pMX5rJ4PYAEM.gif"},
+  "cry": {"image_url": "http://i.giphy.com/10tIjpzIu8fe0.gif"},
+  "micdrop":{"image_url":"http://i.imgur.com/9XHl18c.gif"}
+}

examples/slackbot/guppy/func.rb

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+require_relative 'bundle/bundler/setup'
+require 'slack_webhooks'
+
+payload = STDIN.read
+#STDERR.puts "PAYLOAD: #{payload}"
+
+images = JSON.load(File.open('commands.json'))
+
+response = {}
+attachment = {
+    "fallback" => "wat?!",
+    "text" => "",
+    "image_url" => "http://i.imgur.com/7kZ562z.jpg"
+}
+
+help = "Available options are:\n"
+images.each_key { |k| help << "* #{k}\n" }
+
+response = {}
+a = []
+response[:attachments] = a
+
+if payload.nil? || payload.strip == ""
+  response[:text] = help
+  a << attachment
+  puts response.to_json
+  exit
+end
+
+sh = SlackWebhooks::Hook.new('guppy', payload, "")
+r = images[sh.text]
+if r
+  a << {image_url: r['image_url'], text: ""} 
+  response[:response_type] = "in_channel"
+  response[:text] = "guppy #{sh.text}" 
+else
+  response[:text] = help
+  a << attachment
+end
+
+puts response.to_json
+
+
+

examples/slackbot/guppy/slack.payload

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+token=somerandomtoken&team_id=someteamid&team_domain=somename&channel_id=somechannelid&channel_name=directmessage&user_id=someid&user_name=someuser&command=%2Fguppy&text=freakout