fix: broken codeforces badge.

Codeforces badge was broken due to the change of page layout. CP-Badge was not able to parse the rating properly. The issue has been fixed by using the new codeforces public API which returns JSON formatted data containing users' information. Fix and improvements are pointed out below.

Changes:

- Codeforces API is used to retrieve user's information.

- Unresponsive API exceptions are handled. A [-1, black] is returned.

- conditional statements are simplified.

- Docstring updated for function.

Resolves: kehsihba19#24

data.py

@@ -28,27 +28,37 @@ def get_info(handle, website):
 
 
 def get_cf(user):
-    url = f'https://www.codeforces.com/profile/{user}'
-    page = requests.get(url)
-    soup = bs(page.text, 'html.parser')
-    s = soup.find_all('span', attrs={'style':'font-weight:bold;'})
-    s=s[-1].text
-    col = 'red'
-    rating = int(s)
-    y=rating
-    if (y <= 1199):
+    """
+        Returns rating and color of the codeforces user.
+
+                Parameters:
+                        user (str): handle of the codeforces user
+                Returns:
+                        [rating, col] (int, str): Current rating and the associated color of the given user.
+                        Returns [-1, "#00000"] (-1, black) if the API is not responding.
+    """
+    url = f'https://codeforces.com/api/user.info?handles={user}'
+    try:
+        response = requests.get(url)
+        profile_data = response.json().get('result')[0]
+    except:
+        return [-1, "#00000"]
+
+    rating = int(profile_data.get('rating', 0))
+    y = rating
+    if y <= 1199:
         col = '#cec8c1'
-    elif (y > 1199 and y <= 1399):
+    elif 1199 < y <= 1399:
         col = '#43A217'
-    elif (y > 1399 and y <= 1599):
+    elif 1399 < y <= 1599:
         col = "#22C4AE"
-    elif (y > 1599 and y <= 1899):
+    elif 1599 < y <= 1899:
         col = "#1427B2"
-    elif (y > 1899 and y <= 2099):
+    elif 1899 < y <= 2099:
         col = "#700CB0"
-    elif (y > 2099 and y <= 2299):
+    elif 2099 < y <= 2299:
         col = "#F9A908"
-    elif (y > 2299 and y <= 2399):
+    elif 2299 < y <= 2399:
         col = "#FBB948"
     else:
         col = "#FF0000"