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# File 'lib/omniauth/strategies/vkontakte/view_helper.rb', line 23
def vkontakte_login_button
<<-BUTTON
<div id="vk_api_transport"></div>
<script type="text/javascript">
window.vkAsyncInit = function() {
VK.init({
apiId: '#{OmniAuth.config.vkontakte_app_id}',
nameTransportPath: "/xd_receiver.html"
});
VK.UI.button('vk_login');
};
vkLogin = {
doLogin: function() {
VK.Auth.login(vkLogin.loginResult);
},
redirectWithPost: function(url, data) {
data = data || {};
#{ respond_to?(:request_forgery_protection_token) && respond_to?(:form_authenticity_token) ?
"data['#{request_forgery_protection_token}'] = '#{form_authenticity_token}'; var method = 'POST';" :
"var method = 'GET';" }
var form = document.createElement("form"),
input;
form.setAttribute("action", url);
form.setAttribute("method", method);
for (var property in data) {
if (data.hasOwnProperty(property)) {
var value = data[property];
if (value instanceof Array) {
for (var i = 0, l = value.length; i < l; i++) {
input = document.createElement("input");
input.setAttribute("type", "hidden");
input.setAttribute("name", property);
input.setAttribute("value", value[i]);
form.appendChild(input);
}
}
else {
input = document.createElement("input");
input.setAttribute("type", "hidden");
input.setAttribute("name", property);
input.setAttribute("value", value);
form.appendChild(input);
}
}
}
document.body.appendChild(form);
form.submit();
document.body.removeChild(form);
},
loginResult: function (r) {
if (r.session) {
if (r.session.expire != "0") {
vkLogin.getUserProfile(vkLogin.putUserProfile);
} else if (r.session.expire == "0") {
VK.Observer.subscribe("auth.sessionChange", function (r) {
VK.Observer.unsubscribe("auth.sessionChange");
if (r.session && r.session.expire != "0") {
vkLogin.getUserProfile(vkLogin.putUserProfile)
} else {
}
});
VK.Auth.login()
}
}
},
getUserProfile: function (callFunc) {
var code;
code = 'return {';
code += 'me: API.getProfiles({uids: API.getVariable({key: 1280}), fields: "nickname,sex,photo"})[0]';
code += '};';
VK.Api.call('execute', {
'code': code
},
callFunc);
},
putUserProfile: function (data) {
if (data.response) {
r = data.response;
vkLogin.redirectWithPost('#{OmniAuth.config.path_prefix}/vkontakte/callback', r.me);
}
}
};
(function() {
var el = document.createElement("script");
el.type = "text/javascript";
el.charset = "windows-1251";
el.src = "http://vkontakte.ru/js/api/openapi.js";
el.async = true;
document.getElementById("vk_api_transport").appendChild(el);
}());
</script>
<div id="vk_login" onclick="vkLogin.doLogin();"></div>
BUTTON
end
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