From 7a74dfff4311a682669d2235ace0a7ab0cde9797 Mon Sep 17 00:00:00 2001
From: Sanj <b@pad.ma>
Date: Tue, 15 May 2012 02:22:57 +0530
Subject: [PATCH] use jquery.pandoravideo.js

---
 itf/frontpage/views.py                      |   2 +
 itf/settings.py                             |  11 +-
 itf/static/js/jquery.pandoravideo.js        | 362 ++++++++++++++++++++
 itf/templates/modules/festival/meeting.html |  22 +-
 itf/templates/noel/insidepage.html          |   1 +
 5 files changed, 393 insertions(+), 5 deletions(-)
 create mode 100644 itf/static/js/jquery.pandoravideo.js

diff --git a/itf/frontpage/views.py b/itf/frontpage/views.py
index 81ac2b7..6764c83 100755
--- a/itf/frontpage/views.py
+++ b/itf/frontpage/views.py
@@ -8,6 +8,7 @@ from django import forms
 from django.forms.widgets import Textarea
 from django.utils.html import urlize
 from django.core.mail import send_mail
+from django.views.decorators.cache import cache_page
 
 class ContactForm(forms.Form):
     name = forms.CharField(max_length=255)
@@ -32,6 +33,7 @@ class ContactForm(forms.Form):
         }
     '''
 
+@cache_page(60 * 30)
 def index(request):
     try:
       tApi = twitter.Api()
diff --git a/itf/settings.py b/itf/settings.py
index 69e7787..23e1fbc 100755
--- a/itf/settings.py
+++ b/itf/settings.py
@@ -64,10 +64,17 @@ DATABASES = {
 
 TWITTER_ID = "sachin_rt"
 
+#CACHES = {
+#    'default': {
+#        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+#        'LOCATION': '127.0.0.1:11211',
+#    }
+#}
+
 CACHES = {
     'default': {
-        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
-        'LOCATION': '127.0.0.1:11211',
+        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
+        'LOCATION': join(PROJECT_ROOT, 'cache'),
     }
 }
 
diff --git a/itf/static/js/jquery.pandoravideo.js b/itf/static/js/jquery.pandoravideo.js
new file mode 100644
index 0000000..637746b
--- /dev/null
+++ b/itf/static/js/jquery.pandoravideo.js
@@ -0,0 +1,362 @@
+'use strict';
+
+(function($) {
+    $.fn.pandoravideo = function(options) {
+
+        //get options, giving preference, in order, to data- attributes defined on the html element, options passed when instantiatiing $(element).pandoravideo(options), defaults.
+        var options = options || {},
+            namespace = options.namespace || "pandora",
+            $this = this;
+        
+         
+        var optionTypes = {
+            'strings': ['api', 'base', 'resolution', 'action', 'id'],
+            'integers': ['in', 'out', 'width', 'interval'],
+            'arrays':  ['layers', 'keys'],
+            'booleans': []
+            //'functions': ['callback'] FIXME: lets not.
+        };
+
+        var dataOptions = $.extend(options, $this.getDataOptions(optionTypes, namespace));
+
+        var opts = $.extend({
+            'id': 'ABC', //FIXME: throw an error if id is undefined at this point
+            'layers': ['transcripts', 'descriptions', 'keywords', 'places'],
+            'keys': ['layers'], //data keys to fetch from API call. FIXME: add more apt keys
+            'api': "//pad.ma/api/", //pandora instance api end-point - see http://pad.ma/api
+            'in': 0, //in point (float, in seconds) of clip
+            'out': 0, //out point of clip
+            'pandora_base': '//pad.ma/', //pandora instance from where to fetch video and image data
+            'resolution': '480p', //resolution of video (96p, 320p, or 480p)
+            'width': '640', //display (css) width
+            'interval': 300, //interval (in ms) to run updatePlayer polling loop
+            'action': 'get', //action POST param to send to url
+            'callback': function() { $.noop(); } //function to call after done instantiating pandoraVideo object, called with the object.
+        }, dataOptions);
+
+        //get the pandora id and instantiate a pandoraVideo object with the current element and render it and execute optional callback
+        var id = opts.id,
+            $loading = $('<div />').addClass("pandoraLoading").text("Loading video...").appendTo($this),
+            sendData = JSON.stringify({'id': id, 'keys': opts.keys});
+                              
+        var deferred = $.post(opts.api, {'action': opts.action, 'data': sendData}, function(response) {
+            $loading.hide().remove();
+            var pandora = new PandoraVideo(id, response.data, $this, opts);
+            pandora.render();
+            opts.callback(pandora);
+        }, "json");
+
+        deferred.error(function(data) {
+            alert("failed to load video data");
+        });
+    };
+
+    /*
+    pandoraVideo class
+    Parameters:
+        id: <string> pandora video id
+        data: <object> data for the video object
+        $el: <jQuery element>
+        opts: <object> options object
+
+    */
+    var PandoraVideo = function(id, data, $el, opts) {
+        var that = this;
+        this.id = id;
+        this.data = data;
+        this.$el = $el;
+        this.o = opts;
+        this.annotPoint = -1;
+        this.getVideoURL = function() {
+            return opts.pandora_base + id + "/" + opts.resolution + ".webm";
+            };
+
+        //empties element, appends video widget
+        this.render = function() {
+            var that = this;
+            this.$el.empty();
+            this.$el.append(that.getWidget());    
+        };
+       
+        /*
+        Get points
+        */
+        var flattenedPoints = [];
+        $.each(that.o.layers, function(i,layerType) {
+            $.each(that.data.layers[layerType], function(j,layer) {
+                flattenedPoints.push(layer['in']);
+                flattenedPoints.push(layer.out);
+            });
+        });
+        this.points = makeArrayUnique(flattenedPoints);
+
+
+        this.crossesPoint = function(newPos) {
+            var that = this;
+            var positions = [that.annotPoint, newPos].sort();
+            return this.points.some(function(point) {
+                return point >= positions[0] && point <= positions[1];
+            });        
+        };
+
+        function makeArrayUnique(arr) {
+            var o = {}, i, l = arr.length, r = [];
+            for(i=0; i<l;i+=1) o[arr[i]] = arr[i];
+            for(i in o) r.push(o[i]);
+            return r;
+        };
+
+        /*
+            Use this to set options on the player from the outside.
+            Example:
+                pandoraVideoObject.setOption("width", 250);
+        */
+        this.setOption = function(key, val) {
+            var that = this;
+            this.o[key] = val;
+            if ($.inArray(key, ['resolution']) != -1) {
+                this.destroy();
+                this.render();
+                return this;
+            }
+            if ($.inArray(key, ['in', 'out', 'layers']) != -1) {
+                this.updatePlayer();
+                return this;
+            }
+            if ($.inArray(key, ['width']) != -1) {
+                this.$video.animate({'width': that.o.width + "px"});
+                return this;
+            }            
+            console.log("attempt to set invalid option or option which will make no difference to player state");
+        };
+
+
+        /*
+        Returns currently defined option for key specified
+        Parameters:
+            key: <string> eg. 'width'
+        */
+        this.getOption = function(key) {
+            return this.o[key] || "invalid option";
+        };
+
+
+        //returns <jQuery element> widget for this pandoraVideo object
+        this.getWidget = function() {
+            var that = this;
+            var $container = this.$container = $('<div />').addClass("pandoraContainer");
+            var $video = this.$video = $('<video />')
+                .appendTo($container)
+                .attr("src", that.getVideoURL())
+                .attr("controls", "controls")
+                .addClass("pandoraVideo")
+                .animate({'width': that.o.width})
+                .load()
+                .bind("loadedmetadata", function() {
+                    this.currentTime = that.o['in'];                    
+                    that.updatePlayer();
+        
+                })
+                .bind("play", function() {
+                    that.interval = setInterval(function() {
+                        that.updatePlayer();
+                    }, that.o.interval)
+                })                            
+                .bind("pause", function() {
+                    clearInterval(that.interval);
+                })
+                .bind("ended", function() {
+                    clearInterval(that.interval);
+                })
+                .bind("seeked", function() {
+                    that.updatePlayer();
+                });
+            var $annotations = this.$annotations = $('<div />')
+                .addClass("pandoraAnnotations")
+                .appendTo($container);
+            return $container;                        
+        };
+
+        //update annotations, etc. based on video currentTime
+        this.updatePlayer = function() {
+            var that = this;            
+            var currentTime = this.$video[0].currentTime;
+            
+            //first, handle if video has crossed out-point or is before in-point
+            if (that.o.out != 0) {
+                if (currentTime >= that.o.out) {
+                    that.$video[0].currentTime = that.o.out;
+                    that.$video[0].pause();
+                }
+                if (currentTime <= that.o['in']) {
+                    that.$video[0].currentTime = that.o['in'];
+                    that.$video[0].pause();
+                }
+            }
+
+
+            //if layers are the same as last update, return 
+            if (!that.crossesPoint(currentTime)) { return false; }
+            //console.log("annot point changed");
+
+            //else, set new annotPoint, construct DOM elements for currently matched layers, etc.
+            that.annotPoint = currentTime;
+            //now get all matching layers at current time code
+            var layerNames = this.o.layers,
+                matchedLayers = {};
+
+            $.each(layerNames, function(i, layerName) {
+                
+                matchedLayers[layerName] = that.getLayersAtTimecode(layerName, currentTime)
+            });
+            that.currentLayers = matchedLayers;
+            that.$annotations.empty();
+            for (var layer in matchedLayers) {
+                if (matchedLayers.hasOwnProperty(layer)) {
+                    var theseLayers = matchedLayers[layer];
+                    //console.log(theseLayers);
+                    if (theseLayers.length > 0) {
+                        var $annotsForLayer = getElemForLayer(layer, theseLayers);
+                        $annotsForLayer.appendTo(that.$annotations);                            
+                    }
+                }
+            }                        
+        };
+
+        /*
+        Parameters:
+            layerName: <string> eg. 'transcripts'
+            currentTime: <float> in seconds    
+        Returns <array> of matched layer objects
+        */
+        this.getLayersAtTimecode = function(layerName, currentTime) {
+            var ret = [];
+            var theseLayers = this.data.layers[layerName];
+            $.each(theseLayers, function(i,layer) {
+                if (layer['in'] < currentTime && layer.out > currentTime) {
+                    ret.push(layer);
+                } 
+            });
+            return ret;
+        };
+
+        this.destroy = function() {
+            this.$video[0].pause();
+            this.$video.remove();
+            this.$el.empty();
+        };
+    };    
+
+    /*
+    Parameters:
+        layerName: <string> eg. 'transcripts'
+        layers: <array> layer objects to render
+    Returns <jQuery element> for an annotation type - i.e. all 'transcripts', or all 'descriptions'
+    */
+    function getElemForLayer(layerName, layers) {
+        if (layers.length === 0) {
+            return $('<div />'); //FIXME
+        }
+        var $elem = $('<div />').addClass("pandoraLayer").addClass(layerName);
+        var title = layerName.substr(0,1).toUpperCase() + layerName.substr(1, layerName.length);
+        var $title = $('<div />').addClass("pandoraLayerTitle").text(title).appendTo($elem);
+
+        $.each(layers, function(i,v) {
+            var $annot = $('<div />').addClass("pandoraAnnot");
+            //TODO: add time-code div
+            var $annotText = $('<div />')
+                .addClass("pandoraAnnotText")
+                .html(v.value)
+                .appendTo($annot);
+            $annot.appendTo($elem);
+        });
+        return $elem;
+    }
+
+    /*
+    Silly function to check if two layer arrays are the same (i.e. to check if matchedLayers have changed)
+    Parameters:
+        layers1: <array> of layer objects
+        layers2: <array> of layer objects to compare with
+    Returns <boolean> true if layer arrays are the same, false if different
+    FIXME: this id concatenation string comparison is a bit weird, but it seemed like a non-expensive simple way to do it
+    */
+    function isSameLayers(layers1, layers2) {
+        var idString1 = '',
+            idString2 = '';
+        for (var l in layers1) {
+            if (layers1.hasOwnProperty(l)) {
+                $.each(layers1[l], function(i,v) {
+                    idString1 += v.id;
+                });
+            }
+        }
+        for (var l in layers2) {
+            if (layers2.hasOwnProperty(l)) {
+                $.each(layers2[l], function(i,v) {
+                    idString2 += v.id;
+                });
+            }
+        }
+        return idString1 == idString2
+    }
+
+    //Returns <boolean> true or false based on whether the browser can play pandora video
+    //FIXME: actually implement this function
+    function canPlayVideo() {
+        return true;
+    }
+
+
+    /*
+    Get options from data- attributes
+        Parameters:                            
+            optionTypes: <object>
+                example: {
+                    'strings': ['option1', 'option2', 'option3'],
+                    'integers': ['fooint', 'barint'],
+                    'arrays': ['list1', 'list2'],
+                    'booleans': ['bool1']
+                }
+
+            namespace: <string>
+                example: 'pandora'
+                    namespace for data- attributes
+                
+            example html:
+                <div id="blah" data-pandora-option1="foobar" data-pandora-fooint="23" data-pandora-list2="apples, oranges" data-pandora-bool1="true">
+
+            usage:
+                var dataOptions = $('#blah').getDataOptions(optionTypes, namespace);
+    */
+    $.fn.getDataOptions = function(optionTypes, namespace) {
+        var $element = this;
+        var prefix = "data-" + namespace + "-",
+            options = {};        
+        $.each(optionTypes['strings'], function(i,v) {
+            var attr = prefix + v;
+            options[v] = $element.hasAttr(attr) ? $element.attr(attr) : undefined;
+        });
+        $.each(optionTypes['integers'], function(i,v) {
+            var attr = prefix + v;
+            options[v] = $element.hasAttr(attr) ? parseInt($element.attr(attr)) : undefined;
+        });
+        $.each(optionTypes['arrays'], function(i,v) {
+            var attr = prefix + v;
+            options[v] = $element.hasAttr(attr) ? $.map($element.attr(attr).split(","), $.trim) : undefined;
+        }); 
+        $.each(optionTypes['booleans'], function(i,v) {
+            var attr = prefix + v;
+            options[v] = $element.hasAttr(attr) ? $element.attr(attr) == 'true' : false;
+        });       
+        return options;
+    }
+
+    /*
+    FIXME: possibly improve - http://stackoverflow.com/questions/1318076/jquery-hasattr-checking-to-see-if-there-is-an-attribute-on-an-element#1318091
+    */
+    $.fn.hasAttr = function(attr) {
+        return this.attr(attr) != undefined;
+    };
+
+})(jQuery);
diff --git a/itf/templates/modules/festival/meeting.html b/itf/templates/modules/festival/meeting.html
index 3d785e0..d43f207 100755
--- a/itf/templates/modules/festival/meeting.html
+++ b/itf/templates/modules/festival/meeting.html
@@ -92,14 +92,17 @@
                   {% endfor %}
                   {% for v in talk.videos.all %}
                   <span class="talkIcon">
-                    <a href="/static/{{ v.padmavideo.padma_link }}" class="padmaLink" data-video="http://pad.ma/{{ v.padmavideo.padma_id }}/480p.webm" target="_blank">
+                    <a href="/static/{{ v.padmavideo.padma_link }}" class="padmaLink" target="_blank">
                       <img src="/static/images/VideoIcon.jpg" title="<span class='ttTitle'>Video: {{ talk.title }}.</span><span class='rightclickHelp'>Click to view on page</span>">
                     </a>
                   </span>
                   {% endfor %}
                 </span>
-              &nbsp;&nbsp;  {{ talk.title }} by {{ talk.presenter }}
-                
+              &nbsp;&nbsp;  {{ talk.title }} {% if talk.presenter %} by {{ talk.presenter }} {% endif %}
+                {% for v in talk.videos.all %}
+                    <div class="padmaVideo" data-pandora-id="{{ v.padmavideo.padma_id }}" data-pandora-in="{{ v.time_in }}" data-pandora-out="{{ v.time_out }}" data-pandora-layers="transcripts" data-pandora-width="480"></div>
+
+                {% endfor %}
               </li>
             {% endfor %}
             </ul>
@@ -246,6 +249,18 @@
 <script type="text/javascript">
 (function() {
     var $video;
+    $('.padmaVideo').hide();
+    $('.padmaVideo').pandoravideo();
+    $('a.padmaLink').toggle(function() {
+        var index = $(this).index('.padmaLink');
+        var $video = $('.padmaVideo').eq(index);
+        $video.slideDown();
+    }, function() {
+        var index = $(this).index('.padmaLink');
+        var $video = $('.padmaVideo').eq(index);
+        $video.slideUp();
+    });
+/*
     $('a.padmaLink').toggle(function(e) {
         e.preventDefault();
         if ($(this).data("$video") == undefined) {
@@ -265,6 +280,7 @@
         $(this).data("$video").slideUp();
            
     });
+*/
 })();
 
 $('.talkIcon img').tooltip({
diff --git a/itf/templates/noel/insidepage.html b/itf/templates/noel/insidepage.html
index 1ea5e29..e69366a 100755
--- a/itf/templates/noel/insidepage.html
+++ b/itf/templates/noel/insidepage.html
@@ -13,6 +13,7 @@
 <script type="text/javascript" src="/static/js/query_parser.js"></script>
 <script type="text/javascript" src="/static/js/jquery.tooltip.js"></script>
 <script type="text/javascript" src="/static/js/insidepage.js"></script>
+<script type="text/javascript" src="/static/js/jquery.pandoravideo.js"></script>
 
 {% endblock %}