Methods for adding, accepting and deleting friends

README.md

@@ -457,6 +457,30 @@ with SteamClient('MY_API_KEY', 'MY_USERNAME', 'MY_PASSWORD', 'PATH_TO_STEAMGUARD
             assert type(on_hold_wallet_balance) == Decimal
 ```
 
+
+**add_friend(steam_id: str) -> bool**
+
+**accept_friend(steam_id: str) -> bool**
+
+**remove_friend(steam_id: str) -> bool**
+
+Using `SteamClient.login` method is required before usage.
+These methods perform the operations of adding, accepting and deleting friends using the provided `steam_id` of the friend.
+If the request was successful, True is returned, otherwise False.
+`remove_friend` method returns True even if `steam_id` has never been a friend
+
+Example:
+```python
+from steampy.client import SteamClient
+
+
+steam_client = SteamClient('MY_API_KEY')
+steam_client.login('MY_USERNAME', 'MY_PASSWORD', 'PATH_TO_STEAMGUARD_FILE')
+
+# if response True - was success
+response = steam_client.add_friend("FRIEND_STEAM_ID")
+```
+
 market methods
 ==============
 

steampy/client.py

@@ -416,3 +416,50 @@ def get_wallet_balance(self, convert_to_decimal: bool = True, on_hold: bool = Fa
             return Decimal(balance_dict[balance_dict_key]) / 100
         else:
             return balance_dict[balance_dict_key]
+
+    @login_required
+    def add_friend(self, steam_id: str) -> bool:
+        response = self._friend_ajax_request(steam_id)
+        return True if response else False
+
+    @login_required
+    def accept_friend(self, steam_id: str) -> bool:
+        return self._friend_ajax_request(steam_id, accept=1)
+
+    _headers = {
+        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
+    }
+
+    def _friend_ajax_request(self, steam_id: str, accept: int = 0) -> dict:
+        url = f'{SteamUrl.COMMUNITY_URL}/actions/AddFriendAjax'
+        data = {
+            'sessionID': self._get_session_id(),
+            'steamid': steam_id,
+            'accept_invite': accept
+        }
+        response = self._session.post(url, data=data, headers=self._headers)
+
+        if response.status_code != 200:
+            raise ApiException(
+                f'Request failed with status code {response.status_code}')
+
+        # returns True or json object if request was succes, otherwise False
+        return response.json()
+
+    @login_required
+    def remove_friend(self, steam_id: str) -> bool:
+        url = f'{SteamUrl.COMMUNITY_URL}/actions/RemoveFriendAjax'
+        data = {
+            'sessionID': self._get_session_id(),
+            'steamid': steam_id
+        }
+        response = self._session.post(url, data=data, headers=self._headers)
+
+        if response.status_code != 200:
+            raise ApiException(
+                f'Request failed with status code {response.status_code}')
+
+        # returns True if request was succes, otherwise False
+        # returns True even if `steam_id` has never been a friend
+        return response.json()
+