gistfile1.txt

from PIL import Image
import sys
import requests
from bs4 import BeautifulSoup

if len(sys.argv) <= 3:
    print "Please provide the filename of the picture as first argument and the cookie of slack as second argument and the prefix"
    exit(1)

max_width_or_height = 3840

img = Image.open(sys.argv[1])
imageWidth, imageHeight = img.size

newImageWidth = (imageWidth/128 + (1 if imageWidth % 128 > 64 else 0)) * 128  
newImageHeight = (imageHeight/128 + (1 if imageHeight % 128 > 64 else 0)) * 128

if newImageWidth > max_width_or_height or newImageHeight > max_width_or_height:
    if newImageWidth > newImageHeight:
        newImageWidth = max_width_or_height
        newImageHeight = int(float(imageHeight)/imageWidth * max_width_or_height)
        newImageHeight = (newImageHeight/128 + (1 if newImageHeight % 128 > 64 else 0)) * 128
    else:
        newImageHeight = max_width_or_height
        newImageWidth = int(float(imageWidth)/imageHeight * max_width_or_height)
        newImageWidth = (newImageWidth/128 + (1 if newImageWidth % 128 > 64 else 0)) * 128
resized_img = img.resize((newImageWidth, newImageHeight))

filenames = []
for i in range(0, newImageWidth, 128):
    for j in range(0, newImageHeight, 128):
        box = (i, j, i + 128, j + 128)
        cropped = resized_img.crop(box)
        filename = sys.argv[3] + str(j / 128) + str(i / 128) + ".png"
        cropped.save(filename)
        filenames.append(filename)

counter = 0
if len(sys.argv) == 4:
    for filename in filenames:
        counter += 1
        print "Uploading tile " + str(counter) + " of " + str(len(filenames))
        session = requests.session()
        session.headers = {'Cookie' : sys.argv[2]}
        files = {"image": (open(filename, "rb"),"image/png"), "mode": "data", "name": filename.replace(".png","")}
        response = session.post("https://coveo.slack.com/api/emoji.add", files=files, allow_redirects=False)
        print response

string_list = []
x = 0
y = 0
for i in range(0, newImageHeight, 128):
    for j in range(0, newImageWidth, 128):
        string_list.append(":" + sys.argv[3] + str(x) + str(y) + ":")
        y += 1
    string_list.append("\n")
    y = 0
    x += 1


print "".join(string_list)