GNU bug report logs - #79242
30.1; [ELPA] More proposed improvements for oauth2

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From: Xiyue Deng <manphiz <at> gmail.com>
To: 79242 <at> debbugs.gnu.org
Cc: Xiyue Deng <manphiz <at> gmail.com>
Subject: bug#79242: [PATCH 5/8] Add support for login_hint
Date: Fri, 15 Aug 2025 03:06:11 -0700

This helps with using predefined `client-id'/`client-secret' and
preset the user login email when requesting the first authorization.
* packages/oauth2/oauth2.el (oauth2-request-authorization): Add
`user-name' parameter and set as `login_hint'.
* packages/oauth2/oauth2.el (oauth2-auth): Add `user-name' parameter
and pass through `oauth2-request-authorization'.
* packages/oauth2/oauth2.el (oauth2-auth-and-store): Pass `user-name'
through `oauth2-auth'.
---
 oauth2.el | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/oauth2.el b/oauth2.el
index 72c5c5dce3..18a372075f 100644
--- a/oauth2.el
+++ b/oauth2.el
@@ -147,14 +147,16 @@ address to build the full URL."
     (concat address "?" data-str)))
 
 (defun oauth2-request-authorization (auth-url client-id &optional scope state
-                                              redirect-uri)
+                                              redirect-uri user-name)
   "Request OAuth authorization at AUTH-URL by launching `browse-url'.
 CLIENT-ID is the client id provided by the provider which uses
 REDIRECT-URI when requesting an access-token.  The default redirect_uri
 for desktop application is usually \"urn:ietf:wg:oauth:2.0:oob\".  SCOPE
 identifies the resources that your application can access on the user's
 behalf.  STATE is a string that your application uses to maintain the
-state between the request and redirect response.
+state between the request and redirect response. USER-NAME is used to
+provide the login_hint which will fill the login user name on the
+requesting webpage to save users some typing.
 
 Returns the code provided by the service."
   (let* ((func-name "oauth2-request-authorization")
@@ -165,6 +167,7 @@ Returns the code provided by the service."
                                  (or redirect-uri oauth2--default-redirect-uri)
                                  "scope" scope
                                  "state" state
+                                 "login_hint" user-name
                                  "access_type" "offline"
                                  "prompt" "consent")))
     (oauth2--do-trivia "[%s]: url: %s" func-name url)
@@ -280,15 +283,15 @@ TOKEN should be obtained with `oauth2-request-access'."
 
 ;;;###autoload
 (defun oauth2-auth (auth-url token-url client-id client-secret
-                             &optional scope state redirect-uri)
+                             &optional scope state redirect-uri user-name)
   "Authenticate application via OAuth2."
   (oauth2-request-access
    auth-url
    token-url
    client-id
    client-secret
-   (oauth2-request-authorization
-    auth-url client-id scope state redirect-uri)
+   (oauth2-request-authorization auth-url client-id scope state redirect-uri
+                                 user-name)
    redirect-uri))
 
 (defun oauth2-compute-id (auth-url token-url scope client-id user-name)
@@ -338,7 +341,7 @@ Returns an `oauth2-token'."
        (oauth2--do-trivia "[%s]: requesting new oauth2-token." func-name)
        (let ((token (oauth2-auth auth-url token-url
                                  client-id client-secret scope state
-                                 redirect-uri)))
+                                 redirect-uri user-name)))
          ;; Set the plstore
          (setf (oauth2-token-plstore-id token) plstore-id)
          (oauth2--update-plstore plstore token)
-- 
2.47.2

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