from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
from time import sleep
import csv
#搜尋關鍵字
keyword = '科技'
#太多貼文捲不完，設置timeout
max_scroll_time = 1

def scroll_to_end(cut):
    SCROLL_PAUSE_TIME = 0.5
    last_height = driver.execute_script("return document.body.scrollHeight")
    exe_times = 0
    while True:
        driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
        sleep(SCROLL_PAUSE_TIME)
        new_height = driver.execute_script("return document.body.scrollHeight")
        if new_height == last_height:
            break
        exe_times += 1
        if cut !=0 :
            if exe_times>cut:
                break
        last_height = new_height

def set_profile_path(profilepath):
    option = webdriver.ChromeOptions()
    option.add_argument('--disable-web-security') 
    option.add_argument('--allow-running-insecure-content') 
    option.add_argument("--user-data-dir="+profilepath+"\\")
    driver = webdriver.Chrome(options=option)
    return driver

driver = set_profile_path('C:/Users/ming/AppData/Local/Google/Chrome/User Data/Default')

driver.get('https://www.facebook.com/search/pages/?q='+keyword)
scroll_to_end(max_scroll_time)
sleep(1)

clubs_elem = driver.find_elements(By.XPATH,"//div[@class='j83agx80 l9j0dhe7 k4urcfbm']")
club_urls = []
club_thumb = []
for e in clubs_elem:
    
    url = e.find_elements(By.XPATH,".//span[@class='nc684nl6']/a")[0].get_attribute('href')
    club_urls.append(url)
    

rows = []
col_name = ['社團名稱','社團按讚','貼文按讚','貼文內容','日期','分享數','留言數']
rows.append(col_name)
thumb_icon_style='background-image: url("https://static.xx.fbcdn.net/rsrc.php/v3/yP/r/-yo1T7mJE5M.png"); background-position: 0px -618px; background-size: 26px 1376px; width: 20px; height: 20px; background-repeat: no-repeat; display: inline-block;'
for url in club_urls:
    driver.get(url)
    #for page loading
    sleep(5)
    club_name = driver.find_element(By.XPATH,"//div[@class='tr9rh885']//h2/span/span").text
    thumbs = driver.find_element(By.XPATH,"//div[@class='taijpn5t cbu4d94t j83agx80']//span/span").text
    scroll_to_end(max_scroll_time)
    #過長貼文需要展開
    showmores = driver.find_elements(By.XPATH,".//*[contains(text(), '顯示更多')]")
    for show_btn in showmores:
        try:
            show_btn.click()
        except:
            pass
    
    post_elems = driver.find_elements(By.XPATH,"//div[@class='du4w35lb k4urcfbm l9j0dhe7 sjgh65i0']")
    for p_elem in post_elems:
        try:
            content = p_elem.find_element(By.XPATH,".//div[@class='ecm0bbzt hv4rvrfc ihqw7lf3 dati1w0a']").text.rstrip()
            time = p_elem.find_element(By.XPATH,".//span[@class='j1lvzwm4 stjgntxs ni8dbmo4 q9uorilb gpro0wi8']/b/b[not(@style='display: none;')]").text
            post_thumbs = p_elem.find_element(By.XPATH,".//span[@class='gpro0wi8 cwj9ozl2 bzsjyuwj ja2t1vim']").text
            shares_comments = p_elem.find_element(By.XPATH,".//div[@class='bp9cbjyn j83agx80 pfnyh3mw p1ueia1e']").text.splitlines()
            shares = ''
            comments = ''
            #分享、留言都塞在這div內
            if len(shares_comments) != 0:
                for item in shares_comments:
                    if '分享' in item:
                        shares = item
                    else:
                        comments = item
            if shares == '':
                shares=0
            if comments =='':
                comments=0
            #分享頁面沒有貼文內容
            if content != '':
                rows.append([club_name,thumbs,post_thumbs,content,time,shares,comments])
            print(time)
            print(content)
            print(shares)
            print(comments)
            print(post_thumbs)
            print('----------------------------------------------------------------')
        except:
            pass #Facebook streaming video posts have no content

with open('out.csv', 'w', encoding='UTF8') as f:
    writer = csv.writer(f)
    for r in rows:
        writer.writerow(r)