/* JPEGCam v1.0.8 */
/* Webcam library for capturing JPEG images and submitting to a server */
/* Copyright (c) 2008 - 2009 
   Joseph Huckaby <jhuckaby@goldcartridge.com>
   AND TIMB, ESQ. <http://bon.gs> */
/* Licensed under the GNU Lesser Public License */
/* http://www.gnu.org/licenses/lgpl.html */

// Everything is under a 'webcam' Namespace
window.webcam = {
    version: '1.0.8',
    
    // globals
    ie: !!navigator.userAgent.match(/MSIE/),
    protocol: location.protocol.match(/https/i) ? 'https' : 'http',
    callback: null, // user callback for completed uploads
    swf_url: 'webcam.swf', // URI to webcam.swf movie (defaults to cwd)
    shutter_url: 'shutter.mp3', // URI to shutter.mp3 sound
    api_url: '', // URL to upload script
    loaded: false, // true when webcam movie finishes loading
    quality: 90, // JPEG quality (1 - 100)
    shutter_sound: true, // shutter sound effect on/off
    hooks: {
	onLoad: null,
	onComplete: null,
	onError: null
    }, // callback hook functions
    
    init: function(){
        webcam.set_api_url( '/upload/message' );
        webcam.set_swf_url('/static/webcam/webcam.swf')
        webcam.set_quality( 90 );
        webcam.set_shutter_sound(false);
        webcam.set_hook('onComplete', webcam.uploadCompleted );
        $("#webcam-button-upload").click(webcam.show);
        $("#webcam-button-snap").click(webcam.takePicture)
    },
    
    uploadCompleted: function(text) {
        $("#webcam-button-snap").attr("value", "Send Pic");
        webcam.reset();
        
        text = $.trim(text);
        if (text != "OK") {
            return;
        } else if (typeof pageTracker !== 'undefined') {
            pageTracker._trackEvent('Message', 'Webcam', typeof Room !== 'undefined' ? Room : 'UnknownRoom');
        }
    },

    takePicture: function(){
        webcam.set_form_data({"room": Room})
        $("#webcam-button-snap").attr("value", "Sending...")
        webcam.snap()	  
    },

    show: function() {
        var closeHtml = '<div onclick="webcam.hide()" id="webcam-button-close">X</div>'
        var camHtml = '<div id="webcam-preview">' + webcam.get_html(480, 360) + closeHtml + "</div>" 
        $("body").append(camHtml)
        $("#webcam-button-upload").addClass("invisible")
        $("#webcam-button-snap").removeClass("invisible")
        $("#effects-msg").removeClass("invisible").fadeOut(70000)
        paletteHide()
        blinkStart()
    },

    hide: function() {
        $("#webcam-button-snap").addClass("invisible")
        $("#webcam-button-upload").removeClass("invisible")
        $("#effects-msg").addClass("invisible")
        blinkStop()
        $("#webcam-preview").remove()
    },

    set_hook: function(name, callback) {
        // set callback hook
        // supported hooks: onLoad, onComplete, onError
        if (typeof(this.hooks[name]) == 'undefined')
	    return alert("Hook type not supported: " + name);
        
        this.hooks[name] = callback;
    },

    fire_hook: function(name, value) {
        // fire hook callback, passing optional value to it
        if (this.hooks[name]) {
	    if (typeof(this.hooks[name]) == 'function') {
	        // callback is function reference, call directly
	        this.hooks[name](value);
	    }
	    else if (typeof(this.hooks[name]) == 'array') {
	        // callback is PHP-style object instance method
	        this.hooks[name][0][this.hooks[name][1]](value);
	    }
	    else if (window[this.hooks[name]]) {
	        // callback is global function name
	        window[ this.hooks[name] ](value);
	    }
	    return true;
        }
        return false; // no hook defined
    },

    set_api_url: function(url) {
        // set location of upload API script
        this.api_url = url;
    },

    set_swf_url: function(url) {
        // set location of SWF movie (defaults to webcam.swf in cwd)
        this.swf_url = url;
    },

    get_html: function(width, height, server_width, server_height) {
        // Return HTML for embedding webcam capture movie
        // Specify pixel width and height (640x480, 320x240, etc.)
        // Server width and height are optional, and default to movie width/height
        if (!server_width) server_width = width;
        if (!server_height) server_height = height;
        
        var html = '';
        var flashvars = 'shutter_enabled=' + (this.shutter_sound ? 1 : 0) + 
	    '&shutter_url=' + escape(this.shutter_url) + 
	    '&width=' + width + 
	    '&height=' + height + 
	    '&server_width=' + server_width + 
	    '&server_height=' + server_height;
        
        if (this.ie) {
	    html += '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="'+this.protocol+'://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="'+width+'" height="'+height+'" id="webcam_movie" align="middle"><param name="allowScriptAccess" value="always" /><param name="allowFullScreen" value="false" /><param name="movie" value="'+this.swf_url+'" /><param name="loop" value="false" /><param name="menu" value="false" /><param name="quality" value="best" /><param name="bgcolor" value="#ffffff" /><param name="flashvars" value="'+flashvars+'"/></object>';
        }
        else {
	    html += '<embed id="webcam_movie" src="'+this.swf_url+'" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="'+width+'" height="'+height+'" name="webcam_movie" align="middle" allowScriptAccess="always" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="'+flashvars+'" />';
        }
        
        this.loaded = false;
        return html;
    },

    get_movie: function() {
        // get reference to movie object/embed in DOM
        if (!this.loaded) return alert("ERROR: Movie is not loaded yet");
        var movie = document.getElementById('webcam_movie');
        if (!movie) alert("ERROR: Cannot locate movie 'webcam_movie' in DOM");
        return movie;
    },

    snap: function(url, callback) {
        // take snapshot and send to server
        // specify fully-qualified URL to server API script
        // and callback function (string or function object)
        if (callback) this.set_hook('onComplete', callback);
        if (url) this.set_api_url(url);
        
        this.get_movie()._snap( this.api_url, this.quality, this.shutter_sound ? 1 : 0 );
    },

    set_form_data: function(form_data) {
        this.get_movie()._set_form_data(form_data);
    },

    freeze: function() {
        // freeze webcam image (capture but do not upload)
        this.get_movie()._snap('', this.quality, this.shutter_sound ? 1 : 0 );
    },

    upload: function(url, callback) {
        // upload image to server after taking snapshot
        // specify fully-qualified URL to server API script
        // and callback function (string or function object)
        if (callback) this.set_hook('onComplete', callback);
        if (url) this.set_api_url(url);
        
        this.get_movie()._upload( this.api_url );
    },

    reset: function() {
        // reset movie after taking snapshot
        this.get_movie()._reset();
    },

    configure: function(panel) {
        // open flash configuration panel -- specify tab name:
        // "camera", "privacy", "default", "localStorage", "microphone", "settingsManager"
        if (!panel) panel = "camera";
        this.get_movie()._configure(panel);
    },

    set_quality: function(new_quality) {
        // set the JPEG quality (1 - 100)
        // default is 90
        this.quality = new_quality;
    },

    set_shutter_sound: function(enabled, url) {
        // enable or disable the shutter sound effect
        // defaults to enabled
        this.shutter_sound = enabled;
        this.shutter_url = url ? url : 'shutter.mp3';
    },

    flash_notify: function(type, msg) {
        // receive notification from flash about event
        switch (type) {
        case 'flashLoadComplete':
	    // movie loaded successfully
	    this.loaded = true;
	    this.fire_hook('onLoad');
	    break;

        case 'error':
	    // HTTP POST error most likely
	    if (!this.fire_hook('onError', msg)) {
	        alert("JPEGCam Flash Error: " + msg);
	    }
	    break;

        case 'success':
	    // upload complete, execute user callback function
	    // and pass raw API script results to function
	    this.fire_hook('onComplete', msg.toString());
	    break;

        default:
	    // catch-all, just in case
	    alert("jpegcam flash_notify: " + type + ": " + msg);
	    break;
        }
    }
};