Download slack custom emojis

slack_emoji_downloader.py

# Author: ArionMiles (Kanishk Singh)
#
# slack_emojis.json is json data sent by emoji.adminList endpoint of slack.
# INSTRUCTIONS:
# 1. Go to https://{YOUR_SLACK}.slack.com/customize/emoji
# 
# 2. Open Dev Tools -> Network -> Filter by XHR
# 
# 3. Reload the page, go to "emoji.adminList?_x_id=XXXXXXXX" endpoint
# 
# 4. go to Response tab -> Select all -> save to file "slack_emojis1.json"
# For multiple requests (pages) of "emoji.adminList...", 
# Save them to slack_emojis2.json, slack_emojis3.json and so on.
# 
# 5. Save the json files in the same path as this python file and create
# an directory called "output" in the same path.

from os import path
import json
import requests

OUTPUT_PATH = "output/{emoji_name}.{ext}"


def load_emojis_from_files(num_of_files):
    emojis = list()
    for i in range(1, num_of_files+1):
        emojis_json = open("slack_emojis{}.json".format(i), "r")
        emoji_data = json.load(emojis_json)
        emojis += emoji_data["emoji"]
    return emojis


def download_emojis(emojis):
    saved_files = 0
    for emoji in emojis:
        emoji_url = emoji["url"]
        emoji_name = emoji["name"]
        ext = emoji_url[-3:]        
        file_path = OUTPUT_PATH.format(emoji_name=emoji_name, ext=ext)
        
        if not path.exists(file_path):
            imgdata = requests.get(emoji_url, stream=True)
            with open(file_path, "wb+") as output:
                output.write(imgdata.content)
                print(f"Saved {emoji_name}.{ext}")
                saved_files += 1
    print(f"Saved {saved_files} new files.")

if __name__ == "__main__":
    num_of_files = int(input("Number of files to load: "))
    print("Loading emojis from JSON files...")
    emojis = load_emojis_from_files(num_of_files)
    print("Emojis loaded. Downloading...")
    download_emojis(emojis)