/*************************************************************
 * Open-selector
 *  Help regular people to login using OpenID without them knowing
 *
 * Javascript snippet to change your regular OpenID box for a provider 
 * combo box.
 *
 * Based on:
 *    - http://sites.google.com/site/oauthgoog/UXFedLogin
 *    - http://ma.gnolia.com/signin/ 
 *
 * This is an alternative to IdSelector? (http://www.idselector.com/)
 *  
 * Proyect page:
 *  http://open-selector.com/
 *  http://code.google.com/p/open-selector/
 * 
 * Jj (jjdelc@gmail.com)
 *  http://isgeek.net/ - 2008
 *
 *
 * Usage
 * -----
 * Add this to your signin page:
 *
 * <script src="/js/open-selector.js" type="text/javascript"></script>
 * <script type="text/javascript">
 *     open_selector.openid_form_id= 'openid_form';// ID for the OpenID form
 *     open_selector.openid_box_id= 'openid_url';// ID for the OpenID URL box
 *     open_selector.init();
 * </script>
 *
 *************************************************************/

// List of OpenID providers
var providers = {
    livejournal: {
        name: 'LiveJournal',
        label: 'Enter your Livejournal username',
        ask_username: true,
        icon: 'http://livejournal.com/favicon.ico',
        sprite_pos: 22*0,
        url: 'http://{username}.livejournal.com/'
    },

    myspace: {
        name: 'MySpace',
        label: 'Enter your MySpace ID',
        ask_username: true,
        icon: 'http://myspace.com/favicon.ico',
        sprite_pos: 22*1,
        url: 'http://myspace.com/{username}'
    },

    yahoo: {
        name: 'Yahoo',
        info: 'Continue to Yahoo to login.',
        ask_username: false,
        icon: 'http://yahoo.com/favicon.ico',
        sprite_pos: 22*4,
        url: 'http://yahoo.com/'
    },

    google: {
        name: 'GMail account',
        ask_username: false,
        info: 'Sign in with Google.',
        icon: 'http://mail.google.com/mail/images/favicon.ico',
        sprite_pos: 22*3,
        url: 'https://www.google.com/accounts/o8/id'
    },

    aol: {
        name: 'AOL',
        label: 'Enter your AOL screenname',
        ask_username: true,
        icon: 'http://aol.com/favicon.ico',
        sprite_pos: 22*8,
        url: 'http://openid.aol.com/{username}'
    },

    flickr: {
        name: 'Flickr',
        label: 'Enter your flickr username',
        ask_username: true,
        icon: 'http://flickr.com/favicon.ico',
        sprite_pos: 22*5,
        url: 'http://flickr.com/photos/{username}'
    },

    technorati: {
        name: 'Technorati',
        label: 'Enter your Technorati username',
        ask_username: true,
        icon: 'http://technorati.com/favicon.ico',
        sprite_pos: 22*7,
        url: 'http://technorati.com/people/technorati/{username}'
    },

    wordpress: {
        name: 'Wordpress',
        label: 'Enter your Wordpress.com username',
        ask_username: true,
        icon: 'http://wordpress.com/favicon.ico',
        sprite_pos: 22*6,
        url: 'http://{username}.wordpress.com/'
    },
    
    blogger: {
        name: 'Blogger',
        label: 'Your Blogger account',
        ask_username: true,
        icon: 'http://blogger.com/favicon.ico',
        sprite_pos: 22*2,
        url: 'http://{username}.blogspot.com/'
    },
    
    myopenid: {
        name: 'MyOpenid',
        ask_username: true,
        icon: "https://www.myopenid.com/favicon.ico?version=1",
        sprite_pos: 22*9,
        url: 'http://{username}.myopenid.com/'
    },

    openid: {
        name: 'Other OpenID provider',
        label: 'Your OpenID identifier',
        ask_username: true,
        icon: 'http://openid.net/favicon.ico',
        sprite_pos: 22*10,
        url: 'http://{username}/'
    }
};

var open_selector = {

    // OPTIONS

    // ID of the OpenID Login form
    openid_form_id: 'openid_form',

    // ID of the OpenID URL box
    openid_box_id: 'openid_url',

    // Set to false to hide Open-selector credits :(
    show_credits: true,

    // Set to false to hide the "Select provider" label before the combo
    show_label: true,

    // Username textbox input size
    textbox_size: 20,

    // Display the provider and user boxes inline
    inline: false,

    // Set to false to disable the updating of the OpenID URL while typing
    // improves performance
    update_openid_url: true,

    // Set a sprite url in order to use icons from there instead of hitting
    // each provider's favicon. Each provider must have the position in
    // pixels where the icon is located (ej: 22*4 # for 4th icon if they are
    // 22px)
    sprite: undefined,

    // The size in px of the sprite's square side
    sprite_size: undefined,

    init: function() {
        var openid_form = $('#' + this.openid_form_id);
        var openid_box = $('#' + this.openid_box_id);
        var openid_box_label = $('label[for=' + this.openid_box_id + ']');
        var button = $('#id_openid_signin');

        var open_user_html = '<input type="text" style="padding-left: 22px;" id="open-selector-username" disabled="disabled" maxlength="25" size="' + this.textbox_size + '"/>';
        var select_html = '<select id="open-selector"><option value="0">Select provider</option></select> ';
        var html_credits = this.show_credits?'<p style="color:#DDD;font-size:80%;font-style:italic;">Powered by <a href="http://open-selector.com" title="Open-selector">Open-selector</a>.</p>':'';
        var html_label = this.show_label?'<label for="open-selector">Select your provider</label>:<br/> ':'';

        openid_box.hide();
        openid_box_label.hide();

        if (this.inline) {
            button.before(select_html + open_user_html + '<span style="font-size:90%;font-style:italic;color:#BBB;" class="open-selector-endpoint">http://your-open-id/</span> ');
        } else {
            openid_box.after('<p>' + html_label + select_html + '</p><p id="open-selector-user-block" style="display:none;"><label for="open-selector-username">Username</label>:<br/> ' + open_user_html + '<br/><span style="font-size: 90%;font-style:italic;color:#BBB" class="open-selector-endpoint"></span></p> <p id="open-selector-info"></p>' + html_credits);
        }

        var open_selector = $('#open-selector');
        var open_user = $('#open-selector-username');
        var open_user_block = $('#open-selector-user-block');
        var info = $('#open-selector-info'); 
        var label = $('#open-selector-user-block label');
        var span = $('span.open-selector-endpoint');

        var provider, selected_provider, provider_id;
        var endpoint = '';
        var provider_options = [];
        var use_sprite = this.sprite != undefined;
        var sprite_size = (use_sprite && this.sprite_size != undefined)?this.sprite_size:22;// hardcoded for 16px favicons

        // Fill the combo box with configured providers
        for (provider_id in providers) {
            provider = providers[provider_id];
            if (use_sprite) {
                background_css = 'background: transparent url(' + this.sprite + ') no-repeat 0px -' + provider.sprite_pos + 'px';
            } else {
                background_css = 'background: transparent url(' + provider.icon + ') no-repeat 0px center';
            }
            provider_options.push('<option id="' + provider_id + '"style="padding-left:' + sprite_size + 'px; height: ' + sprite_size + 'px;' + background_css + '">' + provider.name + '</option>');
        }
        open_selector.append(provider_options.join(''));
        // Select the first item (it has value 0)
        open_selector.val(0);

        var that = this;

        // Set what to do on each provider selecion
        open_selector.change(function(){
            endpoint = "";
            $('option', this).each(function(){
                if (this.selected) {
                    if (this.id) {
                        selected_provider = providers[this.id];
                        endpoint = selected_provider.url;

                        if (selected_provider.info) {
                            if (that.inline) {
                                if (!selected_provider.ask_username)
                                    open_user.val(selected_provider.info);
                                else
                                    open_user.val('');

                                info.hide();
                            } else {
                                info.html(selected_provider.info);
                                info.show();
                            }
                        } else {
                            if (that.inline){
                                open_user.val('');
                            } else {
                                info.hide();
                            }
                        }

                        tmp_color = open_user.css('background-color');
                        if (use_sprite) {
                            background_css = 'url(' + that.sprite + ') no-repeat 0px -' + selected_provider.sprite_pos + 'px';
                        } else {
                            background_css = 'url(' + selected_provider.icon + ') no-repeat 0px center';
                        }
                        open_user.css('background', tmp_color + background_css);
                        span.html(endpoint);
                        if ( selected_provider.ask_username) {
                            label.html(selected_provider.label?selected_provider.label:"Enter your username");

                            if (!that.inline) open_user_block.show();
                            open_user.removeAttr('disabled');
                            open_user.focus();
                        } else {
                            if (that.inline) {
                                open_user.attr('disabled', 'disabled');
                            } else {
                                open_user_block.hide();
                            }
                        }
                    } else {
                        // Not a provider selection
                        if (that.inline){
                            open_user.attr('disabled', 'disabled');
                        } else {
                            open_user_block.hide();
                            info.hide();
                        }
                    }
                return; // Stop looping here
                }
            });
        });
        // Set the last selected value from cookies
        var cookie_prov = readCookie('open_selector_provider');
        var cookie_user = readCookie('open_selector_username');
        if (cookie_prov) {
            open_selector.val(cookie_prov);    
            open_selector.change();
        }
        if (cookie_user) {
            open_user.val(cookie_user);
            endpoint = endpoint.replace('{username}', open_user.val());
            openid_box.val(endpoint);
        }

        if (this.update_openid_url) {
            open_user.bind("blur focus keydown keyup click", function(){
                span.html(open_user.val()?
                    endpoint.replace('{username}', "<strong>" + (open_user.val()) + "</strong>"):endpoint);
            });
        }

        // Convert the endpoint to the OpenID identifier before submiting()
        var button_action = button.click;
        button.click(function(){
            endpoint = selected_provider.url;
            endpoint = endpoint.replace('{username}', open_user.val());
            openid_box.val(endpoint);
            // Set the selected values on cookies for future use :)
            createCookie('open_selector_provider', open_selector.val());
            createCookie('open_selector_username', open_user.val());
            button_action();
        });

    }
};

// http://www.quirksmode.org/js/cookies.html
function createCookie(name,value,days) { if (days) { var date = new Date(); date.setTime(date.getTime()+(days*24*60*60*1000)); var expires = "; expires="+date.toGMTString(); } else var expires = ""; document.cookie = name+"="+value+expires+"; path=/"; } 
function readCookie(name) { var nameEQ = 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; } 
function eraseCookie(name) { createCookie(name,"",-1); }