LinkDataのデータセットをまとめてダウンロードする

![output-palette-none.gif](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/271765/9fefbc0c-f34f-d030-e668-690e8839c010.gif)

LinkDataというオープンデータの共有サービスがあるのだけど，その中のデータをCSV形式でダウンロードをする時に，
アカウント単位で全部落とすような方法はないので作った．

アカウントのIDを入れると，そのアカウントのリポジトリをまとめて全部or必要なものを選択してダウンロードできる．
何も選択しなければ愛知県半田市のデータがダウンロードされる．

```python:linkdata-crawler.py
# encoding: utf-8

import urllib.request
import urllib.parse
import json
import os
import sys
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.common.by import By
import time
import re
import inquirer

def main():
    print('''
    This script get all datasets for a specific user at LinkData.org
    you need chromedriver, if you don't have it `brew cask install chromedriver`
    Press ^C at any time to quit.
    ''')
    account_id = ""
    args = sys.argv
    if len(args) < 2:
        account_id = input("account id: (kouhou_handacity) ")
        if len(account_id) == 0:
            account_id = "kouhou_handacity"
            


    options = Options()
    options.add_argument('--disable-gpu')
    options.add_argument('--headless')
    driver = webdriver.Chrome(chrome_options=options)
    driver.get("https://user.linkdata.org/user/{0}/work".format(account_id))

    while True:
        try:
            WebDriverWait(driver, 30).until(EC.presence_of_all_elements_located)
            driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
            driver.find_element_by_class_name("btn-more").click()
            time.sleep(3)
            print("click")
        except Exception as e:
            print(e)
            break

    path_list = {}
    
    print("check all datasets")
    for user_image_path in driver.find_elements_by_class_name('entity'):
        dataset_name = user_image_path.find_elements_by_class_name("entity_name")[0].get_attribute("title")
        dataset_path = user_image_path.find_elements_by_class_name("user_image")[0].get_attribute("src")
        if 'rdf' in dataset_path:
            print("{0}: {1}".format(dataset_name, dataset_path))
            path_list[str(dataset_name)] = str(dataset_path)
           
    driver.quit()
    
    repos = path_list.keys()

    while True:
        check = input("Download All Project? (y/N)")
        if (check == "y") or (check == ""):
            break
        elif (check == "N"):
            questions = [
                    inquirer.Checkbox(
                        'datasets',
                        message="\nWhich do you want to download ?",
                        choices=repos
                        )
                    ]
            answers = inquirer.prompt(questions)
            repos = answers["datasets"]
            break


    for i, r in enumerate(repos):
        time.sleep(1)
        print("\n[{0}/{1}] check {2}".format(i+1, len(repos), r))
        if not os.path.exists("datasets/"+r):
            print("    mkdir dastasets/{0}".format(r))
            os.makedirs("datasets/" + r)
        req = urllib.request.Request("http://linkdata.org/api/1/{0}/datapackage.json".format(os.path.basename(path_list[r])))
        with urllib.request.urlopen(req) as response:
            html = response.read().decode("utf-8")
            all_data = json.loads(html)
            all_project = all_data["resources"]
            for j, proj in enumerate(all_project):
                time.sleep(1)
                csv_name = os.path.basename(proj["url"])
                csv_path = proj["url"]
                if not os.path.isfile("datasets/"+r+"/"+csv_name):
                    print("    [{0}/{1}] download... {2}".format(j+1, len(all_project), csv_name))
                    urllib.request.urlretrieve(csv_path, "datasets/"+r+"/"+csv_name)
                else:
                    print("    [{0}/{1}] {2} already exists".format(j+1, len(all_project), csv_name))
    print("end")

if __name__ == "__main__":
    main()
```

そんな大したものは使ってないけど，依存関係のあるファイルはこれをつかてください．

```text:requirements.txt
blessings==1.7
inquirer==2.6.3
python-editor==1.0.4
readchar==2.0.1
selenium==3.141.0
six==1.12.0
urllib3==1.25.6
```

誰かの参考になれば．