From a86f91b778c84cf14b1d4c8c32b8c1b03ac5c66f Mon Sep 17 00:00:00 2001
From: Edward Betts <edward@4angle.com>
Date: Mon, 15 Aug 2022 21:10:14 +0100
Subject: [PATCH] More code for talking to Wikipedia via OAuth.

---
 dab_mechanic/wikidata_oauth.py | 85 ++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 dab_mechanic/wikidata_oauth.py

diff --git a/dab_mechanic/wikidata_oauth.py b/dab_mechanic/wikidata_oauth.py
new file mode 100644
index 0000000..dca0707
--- /dev/null
+++ b/dab_mechanic/wikidata_oauth.py
@@ -0,0 +1,85 @@
+from urllib.parse import urlencode
+
+from flask import current_app, session
+from requests_oauthlib import OAuth1Session
+
+wiki_hostname = "en.wikipedia.org"
+api_url = f"https://{wiki_hostname}/w/api.php"
+
+
+def get_edit_proxy() -> dict[str, str]:
+    """Retrieve proxy information from config."""
+    edit_proxy = current_app.config.get("EDIT_PROXY")
+    if edit_proxy:
+        return {"http": edit_proxy, "https": edit_proxy}
+    else:
+        return {}
+
+
+def api_post_request(params: dict[str, str | int]):
+    """HTTP Post using Oauth."""
+    app = current_app
+    url = "https://www.wikidata.org/w/api.php"
+    client_key = app.config["CLIENT_KEY"]
+    client_secret = app.config["CLIENT_SECRET"]
+    oauth = OAuth1Session(
+        client_key,
+        client_secret=client_secret,
+        resource_owner_key=session["owner_key"],
+        resource_owner_secret=session["owner_secret"],
+    )
+    proxies = get_edit_proxy()
+    return oauth.post(url, data=params, timeout=4, proxies=proxies)
+
+
+def raw_request(params):
+    app = current_app
+    url = "https://www.wikidata.org/w/api.php?" + urlencode(params)
+    client_key = app.config["CLIENT_KEY"]
+    client_secret = app.config["CLIENT_SECRET"]
+    oauth = OAuth1Session(
+        client_key,
+        client_secret=client_secret,
+        resource_owner_key=session["owner_key"],
+        resource_owner_secret=session["owner_secret"],
+    )
+    proxies = get_edit_proxy()
+    return oauth.get(url, timeout=4, proxies=proxies)
+
+
+def api_request(params):
+    return raw_request(params).json()
+
+
+def get_token():
+    params = {
+        "action": "query",
+        "meta": "tokens",
+        "format": "json",
+        "formatversion": 2,
+    }
+    reply = api_request(params)
+    token = reply["query"]["tokens"]["csrftoken"]
+
+    return token
+
+
+def userinfo_call():
+    """Request user information via OAuth."""
+    params = {"action": "query", "meta": "userinfo", "format": "json"}
+    return api_request(params)
+
+
+def get_username():
+    if "owner_key" not in session:
+        return  # not authorized
+
+    if "username" in session:
+        return session["username"]
+
+    reply = userinfo_call()
+    if "query" not in reply:
+        return
+    session["username"] = reply["query"]["userinfo"]["name"]
+
+    return session["username"]