Custom icons for OAuth sources (#14161)

* Add Icon URL to Backend

* Template for Icon URL

* Localization & Edit Icon URL

* Improve Custom Icon URL

* Removed not working else

Co-authored-by: 6543 <6543@obermui.de>

models/login_source.go

 	ClientSecret                  string
 	OpenIDConnectAutoDiscoveryURL string
 	CustomURLMapping              *oauth2.CustomURLMapping
+	IconURL                       string
 }
 
 // FromDB fills up an OAuth2Config from serialized format.

models/oauth2.go

 	var orderedKeys []string
 	providers := make(map[string]OAuth2Provider)
 	for _, source := range loginSources {
-		providers[source.Name] = OAuth2Providers[source.OAuth2().Provider]
+		prov := OAuth2Providers[source.OAuth2().Provider]
+		if source.OAuth2().IconURL != "" {
+			prov.Image = source.OAuth2().IconURL
+		}
+		providers[source.Name] = prov
 		orderedKeys = append(orderedKeys, source.Name)
 	}
 

modules/auth/auth_form.go

 	Oauth2AuthURL                 string
 	Oauth2ProfileURL              string
 	Oauth2EmailURL                string
+	Oauth2IconURL                 string
 	SSPIAutoCreateUsers           bool
 	SSPIAutoActivateUsers         bool
 	SSPIStripDomainNames          bool

options/locale/locale_en-US.ini

 auths.skip_tls_verify = Skip TLS Verify
 auths.pam_service_name = PAM Service Name
 auths.oauth2_provider = OAuth2 Provider
+auths.oauth2_icon_url = Icon URL
 auths.oauth2_clientID = Client ID (Key)
 auths.oauth2_clientSecret = Client Secret
 auths.openIdConnectAutoDiscoveryURL = OpenID Connect Auto Discovery URL

routers/admin/auths.go

 		ClientSecret:                  form.Oauth2Secret,
 		OpenIDConnectAutoDiscoveryURL: form.OpenIDConnectAutoDiscoveryURL,
 		CustomURLMapping:              customURLMapping,
+		IconURL:                       form.Oauth2IconURL,
 	}
 }
 

templates/admin/auth/edit.tmpl

 						<label for="oauth2_secret">{{.i18n.Tr "admin.auths.oauth2_clientSecret"}}</label>
 						<input id="oauth2_secret" name="oauth2_secret" value="{{$cfg.ClientSecret}}" required>
 					</div>
+					<div class="optional field">
+            <label for="oauth2_icon_url">{{.i18n.Tr "admin.auths.oauth2_icon_url"}}</label>
+            <input id="oauth2_icon_url" name="oauth2_icon_url" value="{{$cfg.IconURL}}">
+          </div>
 					<div class="open_id_connect_auto_discovery_url required field">
 						<label for="open_id_connect_auto_discovery_url">{{.i18n.Tr "admin.auths.openIdConnectAutoDiscoveryURL"}}</label>
 						<input id="open_id_connect_auto_discovery_url" name="open_id_connect_auto_discovery_url" value="{{$cfg.OpenIDConnectAutoDiscoveryURL}}">

templates/admin/auth/source/oauth.tmpl

 		<label for="oauth2_secret">{{.i18n.Tr "admin.auths.oauth2_clientSecret"}}</label>
 		<input id="oauth2_secret" name="oauth2_secret" value="{{.oauth2_secret}}">
 	</div>
+	<div class="optional field">
+  	<label for="oauth2_icon_url">{{.i18n.Tr "admin.auths.oauth2_icon_url"}}</label>
+  	<input id="oauth2_icon_url" name="oauth2_icon_url" value="{{.oauth2_icon_url}}">
+  </div>
 	<div class="open_id_connect_auto_discovery_url required field">
 		<label for="open_id_connect_auto_discovery_url">{{.i18n.Tr "admin.auths.openIdConnectAutoDiscoveryURL"}}</label>
 		<input id="open_id_connect_auto_discovery_url" name="open_id_connect_auto_discovery_url" value="{{.open_id_connect_auto_discovery_url}}">