/**
* A video bar embedable. Loosely based on code provided by BrightCove
* @author: Joe Hohertz
* @version: 1.1
* @modified: 2009-09-22 [Craig Nagy]
*/
function video_bar_generator(token, defaultsort, basetags) {
this.token = token || null;
this.defaultsort = (defaultsort != null) ? defaultsort : 'PLAYS_TRAILING_WEEK';
this.basetags = basetags || null;
/**
* Total number of videos to display
*/
this.num = 4;
/**
* Number of videos to display per row
*/
this.per_row = 4;
/**
* Number of videos to retrieve on each request.
* Depending on video status and scheduling, not
* all videos will be displayed; so multiple requests
* are made until the number of videos (num) has been filled.
* To reduce the number of requests, make this number slightly
* larger than the number of videos (num).
*/
this.buffer = 10;
/**
* Ref: http://docs.brightcove.com/en/media/#PublicVideoFieldsEnum
* If empty, default fields are retrieved. Note that the is_live
* function depends on STARTDATE, ENDDATE, and ITEMSTATE
*/
this.video_fields = "ID,NAME,SHORTDESCRIPTION,LONGDESCRIPTION,CREATIONDATE,PUBLISHEDDATE,LASTMODIFIEDDATE,STARTDATE,ENDDATE,LINKURL,LINKTEXT,TAGS,VIDEOSTILLURL,THUMBNAILURL,REFERENCEID,LENGTH,ECONOMICS,ITEMSTATE,PLAYSTOTAL,PLAYSTRAILINGWEEK,VERSION,CUEPOINTS,SUBMISSIONINFO,CUSTOMFIELDS,RELEASEDATE,FLVURL,RENDITIONS,GEOFILTERED,GEORESTRICTED,GEOFILTEREXCLUDE,EXCLUDELISTEDCOUNTRIES,GEOFILTEREDCOUNTRIES,ALLOWEDCOUNTRIES,ACCOUNTID,FLVFULLLENGTH,VIDEOFULLLENGTH";
// Resource strings
this.title = "OTHER CLIPS";
this.playersite = "http://video.citytv.com";
this.morelink = "http://video.citytv.com";
this.moretext = "View More Videos";
/**
* Performs the async request to the BC API and displays
* the video information in the destdiv.
*
* Ref: http://docs.brightcove.com/en/media/
*/
this.embed = function(destdiv, tags, title, sort, playersite, itemplayersite, viewMoreText) {
var self = this; // reference to the video_bar_generator context
var calltags = tags || "";
var callsort = sort || this.defaultsort;
var calltitle = title || this.title;
var callmorelink = playersite || this.morelink;
var callmoretext = viewMoreText || this.moretext;
var callplayersite = playersite || this.playersite;
var callitemplayersite = itemplayersite || this.playersite;
var page_number = 0;
var max_requests = 50; // prevents infinite recusion
var display_count = 0;
var localscope = {};
if (this.basetags) {
calltags += (',' + this.basetags);
}
// Build and inject initial markup for video list
var html = [
''];
$container = $(html.join('')).appendTo(destdiv);
// To prevent multiple calls from overlapping
localscope[destdiv] = $container.find('div.Video-Clip-List');
// Make the initial call
$.getJSON(query_url(), display_videos);
/**
* Callback function for displaying videos
*/
function display_videos(data) {
if (data.items && data.items.length > 0) {
// loop through our video data to generate each video item's markup
$.each(data.items, function(i, item) {
if (is_live(item) && display_count < self.num) {
append_video(item);
display_count++;
}
});
// make another request if we haven't filled
// the number of videos required
if (display_count < self.num && ++page_number < max_requests) {
$.getJSON(query_url(), display_videos);
}
} else {
// If no more videos, output nothing
//localscope[destdiv].append('Sorry, videos clips are temporarily unavailable.
');
}
};
/**
* Appends a video to the videos list
*/
function append_video(item) {
// build HTML for each clip.
var h = [
'',
// link it to the video site
'
',
// thumbnail
'
',
// title
'
',
ellipsis(item.name, 40), '
',
// description
'
', ellipsis(item.shortDescription, 140), '
',
'
' + h[0]; h[h.length] = '
';
// last video in each row
} else if (display_count % self.per_row == self.per_row - 1) {
h[0] = '' + h[0];
h[h.length] = '
';
}
// tack this entry onto the video list
localscope[destdiv].append(h.join(''));
};
/**
* Generates the URL to query the BC video api
* @see judos (judos.js)
*/
function query_url() {
// Generate our query
var query = '';
if (calltags) {
query = judos.getURL("find_videos_by_tags", {
"token": self.token,
"and_tags": escape(calltags),
"sort_by": callsort,
"page_number": page_number,
"page_size": self.buffer,
"video_fields": self.video_fields
});
} else {
query = judos.getURL("find_all_videos", {
"token": self.token,
"sort_by": callsort,
"page_number": page_number,
"page_size": self.buffer,
"video_fields": self.video_fields
});
}
return query;
};
}; // this.embed
/**
* Helper to determine if a video is live based
* on it's state and scheduled dates. If neither
* dates are set, the video is assumed to be live.
*/
function is_live(video)
{
if(video.itemState && video.itemState != "ACTIVE")
return false;
var now = new Date();
var displayStart = new Date();
var displayEnd = new Date();
if(video.startDate) displayStart.setTime(video.startDate);
if(video.endDate) displayEnd.setTime(video.endDate);
if(video.startDate && video.endDate)
return now >= displayStart && now <= displayEnd;
else if(video.startDate)
return now >= displayStart;
else if(video.endDate)
return now <= displayEnd;
else
return true;
};
/**
* Restricts the length of a string to a given
* number of characters.
*/
function ellipsis (text, size) {
var newtext = text;
if (newtext.length > size) {
newtext = newtext.substring(0, size);
newtext = newtext.replace(/\w+$/, '');
newtext = newtext + "..."
}
return newtext;
};
};