Add rename function option to return activity ID from uploaded activity

README.md

@@ -250,6 +250,69 @@ generated from workouts are accepted without issues.
 }
 ```
 
+Using the `return_id` flag will make the code wait for Garmin to return
+its internal identifier for the newly created activity, which can
+be used for other methods such as renaming. The "internal ID" will
+be contained within the resulting dictionary at
+`result["detailedImportResult"]["successes"][0]["internalId"]`:
+
+```python
+with open("12129115726_ACTIVITY.fit", "rb") as f:
+    uploaded = garth.client.upload(f, return_id=True)
+```
+
+```python
+{
+    'detailedImportResult': {
+        'uploadId': 212157427938,
+        'uploadUuid': {
+            'uuid': '6e56051d-1dd4-4f2c-b8ba-00a1a7d82eb3'
+        },
+        'owner': 2591602,
+        'fileSize': 5289,
+        'processingTime': 36,
+        'creationDate': '2023-09-29 01:58:19.113 GMT',
+        'ipAddress': None,
+        'fileName': '12129115726_ACTIVITY.fit',
+        'report': None,
+        'successes': [
+            {
+                'internalId': 17123456789,
+                'externalId': None,
+                'messages': None
+            }
+        ],
+        'failures': []
+    }
+}
+```
+
+## Renaming an activity
+
+Using the "internal activity id" from above, an activity can be renamed using the
+`rename` method. This snippet shows an example of uploading an activity, fetching its
+id number, and then renaming it on Garmin Connect:
+
+```python
+import garth
+from garth.exc import GarthException
+
+garth.resume(".garth")
+try:
+    garth.client.username
+except GarthException:
+    # Session is expired. You'll need to log in again
+    garth.login("email", "password")
+    garth.save(".garth")
+
+with open("your_fit_file.fit", "rb") as fp:
+    response = garth.client.upload(fp, return_id=True)
+
+id_num = response["detailedImportResult"]["successes"][0]["internalId"]
+garth.client.rename(id_num, "A better title than 'Virtual Cycling'")
+```
+
+
 ## Stats resources
 
 ### Stress

garth/http.py

@@ -1,6 +1,7 @@
 import base64
 import json
 import os
+from time import sleep
 from typing import IO, Any, Dict, Tuple
 from urllib.parse import urljoin
 
@@ -184,18 +185,97 @@ def download(self, path: str, **kwargs) -> bytes:
         return resp.content
 
     def upload(
-        self, fp: IO[bytes], /, path: str = "/upload-service/upload"
+        self,
+        fp: IO[bytes],
+        /,
+        path: str = "/upload-service/upload",
+        return_id: bool = False,
     ) -> Dict[str, Any]:
+        """Upload FIT file to Garmin Connect.
+
+        Args:
+            fp: open file pointer to FIT file
+            path: the API endpoint to use
+            return_id: Whether to return the Garmin internal activity ID
+                (default: ``False``). This requires polling to see if Garmin
+                Connect has finished processing the activity, so setting this
+                option to ``True`` may introduce some delay
+
+        Returns:
+            response dictionary with single key ``"detailedImportResult"``. If
+            ``return_id=True``, will contain the identifier at the path
+            ``result["detailedImportResult"]["successes"][0]["internalId"]``
+
+        Raises:
+            ``AssertionErrror`` if the upload request returns no response
+        """
         fname = os.path.basename(fp.name)
         files = {"file": (fname, fp)}
-        result = self.connectapi(
+        resp = self.request(
+            "POST",
+            "connectapi",
             path,
-            method="POST",
             files=files,
         )
+        result = None if resp.status_code == 204 else resp.json()
         assert result is not None, "No result from upload"
+
+        if return_id:
+            tries = 0
+            # get internal activity ID from garmin connect, try five
+            # times with increasing waits (it takes some time for Garmin
+            # connect to return an ID)
+            while tries < 5:
+                wait = (tries + 1) * 0.5
+                sleep(wait)
+                if "location" in resp.headers:
+                    id_resp = self.request(
+                        "GET",
+                        "connectapi",
+                        resp.headers["location"].replace(
+                            "https://connectapi.garmin.com",
+                            "",
+                        ),
+                        api=True
+                    )
+                    if id_resp.status_code == 202:
+                        continue
+                    elif id_resp.status_code == 201:
+                        print(id_resp.json()["detailedImportResult"])
+                        result["detailedImportResult"]["successes"] = \
+                            id_resp.json()["detailedImportResult"]["successes"]
+                        break
         return result
 
+    def rename(
+        self, activity_id: int, new_title: str 
+    ):
+        """Rename an activity on Garmin Connect.
+
+        Args:
+            activity_id: the internal Garmin Connect activity id number
+            new_title: the new title to use for the activity
+        Raises:
+            ``AssertionErrror`` if the rename request has an unexpected status
+        """
+        response = self.request(
+            "POST",
+            "connect",
+            f"/activity-service/activity/{activity_id}",
+            api=True,
+            json = {
+                "activityId": activity_id,
+                "activityName": new_title
+            },
+            headers = {
+                "accept": "application/json, text/javascript, */*; q=0.01",
+                "di-backend": "connectapi.garmin.com",
+                "x-http-method-override": "PUT",
+                "content-type": "application/json"
+            }
+        )
+        assert response.status_code == 204, "Unexpected status from rename"
+
     def dump(self, dir_path: str):
         dir_path = os.path.expanduser(dir_path)
         os.makedirs(dir_path, exist_ok=True)