/*
Simple OpenID Plugin
http://code.google.com/p/openid-selector/

This code is licenced under the New BSD License.
*/

var providers_large = {
    google: {
        name: 'Google',
        url: 'https://www.google.com/accounts/o8/id'
    },
    yahoo: {
        name: 'Yahoo',
        url: 'http://yahoo.com/'
    },
    aol: {
        name: 'AOL',
        label: 'Enter your AOL screenname.',
        url: 'http://openid.aol.com/{username}/'
    },
    openid: {
        name: 'OpenID',
        label: 'Enter your OpenID.',
        url: null
    }
};
var providers_small = {
    myopenid: {
        name: 'MyOpenID',
        label: 'Enter your MyOpenID username.',
        url: 'http://{username}.myopenid.com/'
    },
    livejournal: {
        name: 'LiveJournal',
        label: 'Enter your Livejournal username.',
        url: 'http://{username}.livejournal.com/'
    },
    flickr: {
        name: 'Flickr',
        label: 'Enter your Flickr username.',
        url: 'http://flickr.com/{username}/'
    },
    technorati: {
        name: 'Technorati',
        label: 'Enter your Technorati username.',
        url: 'http://technorati.com/people/technorati/{username}/'
    },
    wordpress: {
        name: 'Wordpress',
        label: 'Enter your Wordpress.com username.',
        url: 'http://{username}.wordpress.com/'
    },
    blogger: {
        name: 'Blogger',
        label: 'Your Blogger account',
        url: 'http://{username}.blogspot.com/'
    },
    verisign: {
        name: 'Verisign',
        label: 'Your Verisign username',
        url: 'http://{username}.pip.verisignlabs.com/'
    },
    vidoop: {
        name: 'Vidoop',
        label: 'Your Vidoop username',
        url: 'http://{username}.myvidoop.com/'
    },
    verisign: {
        name: 'Verisign',
        label: 'Your Verisign username',
        url: 'http://{username}.pip.verisignlabs.com/'
    },
    claimid: {
        name: 'ClaimID',
        label: 'Your ClaimID username',
        url: 'http://claimid.com/{username}'
    }
};
var providers = $.extend({}, providers_large, providers_small);

var openid = {

    cookie_expires: 6*30,   // 6 months.
    cookie_name: 'openid_provider',
    cookie_path: '/',

    img_path: 'images/',

    input_id: null,
    provider_url: null,

    init: function(input_id) {

        var openid_btns = $('#openid_btns');

        this.input_id = input_id;

        $('#openid_choice').show();
        $('#openid_input_area').empty();

        // add box for each provider
        for (id in providers_large) {

            openid_btns.append(this.getBoxHTML(providers_large[id], 'large', '.gif'));
        }
        if (providers_small) {
            openid_btns.append('<br/>');

            for (id in providers_small) {

                openid_btns.append(this.getBoxHTML(providers_small[id], 'small', '.ico'));
            }
        }

        $('#openid_form').submit(this.submit);

        var box_id = this.readCookie();
        if (box_id) {
            this.signin(box_id, true);
        }
    },
    /* Remove providers that do not match the given RegExp */
    filterProviders: function(re) {
        for (var k in providers) if (!re.test(k)) delete providers[k];
        for (var k in providers_small) if (!re.test(k)) delete providers_small[k];
        for (var k in providers_large) if (!re.test(k)) delete providers_large[k];
    },
    getBoxHTML: function(provider, box_size, image_ext) {

        var box_id = provider["name"].toLowerCase();
        return '<a title="'+provider["name"]+'" href="javascript: openid.signin(\''+ box_id +'\');"' +
                ' style="background: #FFF url(' + 
                ('image' in provider ? provider['image'] : this.img_path + box_id + image_ext) +
                ') no-repeat center center" ' +
                'class="' + box_id + ' openid_' + box_size + '_btn"></a>';

    },
    /* Provider image click */
    signin: function(box_id, onload) {

        var provider = providers[box_id];
        if (! provider) {
            return;
        }

        this.highlight(box_id);
        this.setCookie(box_id);

        // prompt user for input?
        if (provider['label']) {
                        var hidden = $('#'+this.input_id);
                        hidden.remove();
            this.useInputBox(provider);
            this.provider_url = provider['url'];

        } else {
                var input_area = $('#openid_input_area');
                        input_area.empty();
            this.setOpenIdUrl(provider['url']);
            if (! onload) {
                $('#openid_form').submit();
            }
        }
    },
    /* Sign-in button click */
    submit: function() {

        var url = openid.provider_url;
        if (url) {
            url = url.replace('{username}', $('#openid_username').val());
            openid.setOpenIdUrl(url);
        }
        return true;
    },
    setOpenIdUrl: function (url) {

        var hidden = $('#'+this.input_id);
        if (hidden.length > 0) {
            hidden.value = url;
        } else {
            $('#openid_form').append('<input type="hidden" id="' + this.input_id + '" name="' + this.input_id + '" value="'+url+'"/>');
        }
    },
    highlight: function (box_id) {

        // remove previous highlight.
        var highlight = $('#openid_highlight');
        if (highlight) {
            highlight.replaceWith($('#openid_highlight a')[0]);
        }
        // add new highlight.
        $('.'+box_id).wrap('<div id="openid_highlight"></div>');
    },
    setCookie: function (value) {

        var date = new Date();
        date.setTime(date.getTime()+(this.cookie_expires*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();

        document.cookie = this.cookie_name+"="+value+expires+"; path=" + this.cookie_path;
    },
    readCookie: function () {
        var nameEQ = this.cookie_name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
    },
    useInputBox: function (provider) {

        var input_area = $('#openid_input_area');

        var html = '';
        var id = 'openid_username';
        var value = '';
        var label = provider['label'];
        var style = '';

        if (label) {
            html = '<p>' + label + '</p>';
        }
        if (provider['name'] == 'OpenID') {
            id = this.input_id;
            value = 'http://';
            style = 'background:#FFF url('+this.img_path+'openid-inputicon.gif) no-repeat scroll 0 50%; padding-left:18px;';
        }
        html += '<input id="'+id+'" type="text" style="'+style+'" name="'+id+'" value="'+value+'" size="35" />' +
                    '<input id="openid_submit" type="submit" value="Sign-In"/>';

        input_area.empty();
        input_area.append(html);

        $('#'+id).focus();
    }
};
