jellyfin-web/dashboard-ui/thirdparty/apiclient/credentials.js

if (!window.MediaBrowser) {
    window.MediaBrowser = {};
}

MediaBrowser.CredentialProvider = function (store) {

    return function () {

        var self = this;
        var credentials;

        function ensure() {

            credentials = credentials || JSON.parse(store.getItem('servercredentials') || '{}');
            credentials.servers = credentials.servers || [];
        }

        function get() {

            ensure();
            return credentials;
        }

        function set(data) {
            credentials = data;
            store.setItem('servercredentials', JSON.stringify(get()));
        }

        self.credentials = function (data) {

            if (data) {
                set(data);
            }

            return get();
        };

        self.addOrUpdateServer = function(list, server) {

            var existing = list.filter(function(s) {
                return s.Id == server.Id;
            })[0];

            if (existing)
            {
                // Merge the data
                existing.DateLastAccessed = Math.max(existing.DateLastAccessed || 0, server.DateLastAccessed || 0, new Date().getTime());

                if (server.AccessToken)
                {
                    existing.AccessToken = server.AccessToken;
                    existing.UserId = server.UserId;
                }
                if (server.ExchangeToken)
                {
                    existing.ExchangeToken = server.ExchangeToken;
                }
                if (server.RemoteAddress)
                {
                    existing.RemoteAddress = server.RemoteAddress;
                }
                if (server.LocalAddress)
                {
                    existing.LocalAddress = server.LocalAddress;
                }
                if (server.Name)
                {
                    existing.Name = server.Name;
                }
                if (server.WakeOnLanInfos && server.WakeOnLanInfos.length)
                {
                    existing.WakeOnLanInfos = server.WakeOnLanInfos;
                }
            }
            else {
                list.push(server);
            }
        };
    };

}(window.store);