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Specify the mode API #660

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Specify the mode API #660

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Add mode for FedCM
tttzach Oct 2, 2024
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62 changes: 43 additions & 19 deletions spec/index.bs
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Expand Up @@ -623,8 +623,11 @@ This specification introduces an extension to the {{CredentialRequestOptions}} o
The {{IdentityCredentialRequestOptions}} contains a list of
{{IdentityProviderConfig}}s that the [=RP=] supports and has
pre-registered with (i.e. the [=IDP=] has given the [=RP=] a `clientId`).
The {{IdentityCredentialRequestOptions}} also contains a {{IdentityCredentialRequestOptionsContext}}
which the user agent can use to provide a more meaningful dialog to users.
The {{IdentityCredentialRequestOptions}} also contains an
{{IdentityCredentialRequestOptionsContext}}, which the user agent can use to
provide a more meaningful dialog to users, and an
{{IdentityCredentialRequestOptionsMode}}, which the user agent can use to
specify different behaviors or dialog types.

<xmp class=idl>
enum IdentityCredentialRequestOptionsContext {
Expand All @@ -634,9 +637,15 @@ enum IdentityCredentialRequestOptionsContext {
"continue"
};

enum IdentityCredentialRequestOptionsMode {
"active",
"passive"
};

dictionary IdentityCredentialRequestOptions {
required sequence<IdentityProviderRequestOptions> providers;
IdentityCredentialRequestOptionsContext context = "signin";
IdentityCredentialRequestOptionsMode mode = "passive";
};
</xmp>

Expand Down Expand Up @@ -774,27 +783,28 @@ To <dfn>create an IdentityCredential</dfn> given an {{IdentityProviderRequestOpt
or a pair (failure, bool), where the bool indicates whether to skip delaying
the exception thrown.
1. Assert: These steps are running [=in parallel=].
1. Let |mode| be |options|'s {{IdentityCredentialRequestOptions/mode}}.
1. If |mode| is [=active=]
1. If [=transient activation=] is not present, return (failure, true).
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1. If [=transient activation=] is present and there is a pending
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This part about pending request is also not precise enough. Presumably this is also scoped to something (perhaps top-level browsing context?). In addition, you are never going to reach this because we disallow this from credential management in 8.2 https://w3c.github.io/webappsec-credential-management/#algorithm-request so that will need to be modified as well at some point

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Good catch on the scoping... let me know if |W|'s top-level browsing context works or if that should be even more specific. Should modifying 8.2 be in this PR?

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No, you cannot modify 8.2 in this PR since that is a separate repo. I also filed an issue because that uses the wrong scope as well. Need to think how to fix it while also allowing the active mode to be prioritized (eg supersede a pending passive mode request)

request where |mode| is [=passive=], return (failure, true) for the
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pending request.
1. Let |loginStatus| be the result of [=get the login status=] with
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the [=/origin=] of |provider|'s {{IdentityProviderConfig/configURL}}.
1. If |loginStatus| is [=unknown=], a user agent MAY set it to [=logged-out=].
1. If |loginStatus| is [=logged-out=], the user agent MUST do one of the following:
1. If |loginStatus| is [=logged-out=], the user agent SHOULD set
|loginStatus| to [=unknown=] and MUST do one of the following:

* Return (failure, false).
* Prompt the user whether to continue. If the user continues, the user
agent SHOULD set |loginStatus| to [=unknown=]. This MAY include an
affordance to [=show an IDP login dialog=].
* Prompt the user whether to continue. This MAY include an affordance
to [=show an IDP login dialog=].

* If the user cancels this dialog, return (failure, true).
* If the user triggers this affordance:
1. Let |config| be the result of running [=fetch the config file=]
with |provider| and |globalObject|.
1. If |config| is failure, return (failure, true).
1. [=Show an IDP login dialog=] with |config| and |provider|.
1. If that algorithm returns failure, return (failure, true).

Issue: We should perhaps provide a way to let the [=RP=] request that
the second option is provided, possibly gated on a user gesture.
See [this issue](https://github.com/fedidcg/FedCM/issues/442) for discussion.
* If the user triggers this affordance,
[=fetch the config file and show an IDP login dialog=].
* If |mode| is [=active=] and [=transient activation=] is present,
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[=fetch the config file and show an IDP login dialog=].

1. Let |requiresUserMediation| be |provider|'s {{IdentityProviderConfig/configURL}}'s [=/origin=]'s
[=requires user mediation=].
1. Let |mediation| be |options|'s {{CredentialRequestOptions/mediation}}.
Expand Down Expand Up @@ -884,7 +894,8 @@ the exception thrown.
1. If [=compute the connection status=] of |account|, |provider| and |globalObject| returns
[=compute the connection status/connected=], show a dialog to request user permission to sign
in via |account|, and set the result in |permission|. The user agent MAY use |options|'s
{{IdentityCredentialRequestOptions/context}} to customize the dialog.
{{IdentityCredentialRequestOptions/context}} and |options|'s
{{IdentityCredentialRequestOptions/mode}} to customize the dialog.
1. Otherwise, let |permission| be the result of running [=request permission to sign-up=]
algorithm with |account|, |config|, |provider|, and |globalObject|. Also set
|disclosureTextShown| to true.
Expand Down Expand Up @@ -1290,8 +1301,9 @@ an {{IdentityProviderAPIConfig}} |config|, an {{IdentityProviderRequestOptions}}
is defined, and the |provider|'s {{IdentityProviderConfig/clientId}} is not in the list of
|account|["{{IdentityProviderAccount/approved_clients}}"], then the user agent MUST display
the |metadata|["{{IdentityProviderClientMetadata/terms_of_service_url}}"] link.
1. The user agent MAY use the {{IdentityCredentialRequestOptions/context}} to customize the
dialog shown.
1. The user agent MAY use the
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{{IdentityCredentialRequestOptions/context}} and |options|'s
{{IdentityCredentialRequestOptions/mode}} to customize the dialog shown.
1. If the user does not grant permission, return false.
1. [=Create a connection between the RP and the IdP account=] with |provider|, |account|, and
|globalObject|.
Expand Down Expand Up @@ -1458,6 +1470,18 @@ success or failure.
1. Otherwise, return failure.
</div>

<div algorithm>
To <dfn>fetch the config file and show an IDP login dialog</dfn> given an {{IdentityProviderConfig}} |provider|, and a |globalObject|, run the following steps. This returns
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success or failure.
1. Assert: these steps are running [=in parallel=].
1. Let |config| be the result of running [=fetch the config file=]
with |provider| and |globalObject|.
1. If |config| is failure, return failure.
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1. [=Show an IDP login dialog=] with |config| and |provider|.
1. If that algorithm succeeds, return success.
1. Otherwise, return failure.
</div>

<!-- ============================================================ -->
## The IdentityProvider Interface ## {#browser-api-identity-provider-interface}
<!-- ============================================================ -->
Expand Down
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