Video.scala

package code {
package model {

import java.net.URL
import dispatch._
import dispatch.liftjson.Js._
import net.liftweb.json.JsonAST._
import net.liftweb
import net.liftweb.util.Helpers._

case class VideoData(title: String, playerURL: String, thumbnail: String, pageURL: String)

abstract class EmbeddedVideo(pageURL: URL) {
    val getTitle: String;
    val getPlayerURL: URL;
    val getThumbnailURL: URL;
}


class YoutubeEmbeddedVideo(pageURL: URL) extends EmbeddedVideo(pageURL) {
    private val getVideoID: String = {
        pageURL.getQuery.substring(2)
    }
    val apiURL = "http://gdata.youtube.com/feeds/api/videos/"+getVideoID+"?v=2&alt=jsonc"
    val getTitle: String = {
        Http(url(apiURL.toString) ># {
            json => json \ "data" \ "title"
        }).values.toString
    }
    val getPlayerURL: URL = {
        new URL("http://www.youtube.com/embed/"+getVideoID)
    }
    val getThumbnailURL: URL = {
        new URL(Http(url(apiURL.toString) ># {
            json => json \ "data" \ "thumbnail" \ "hqDefault"
        }).values.toString)
    }
}

class DailymotionEmbeddedVideo(pageURL: URL) extends EmbeddedVideo(pageURL) {
    private val getVideoID: String = {
        pageURL.getPath.substring(
            pageURL.getPath.lastIndexOf("/")+1,
            pageURL.getPath.indexOf("_")
        )
    }
    val apiURL = "http://www.dailymotion.com/services/oembed?format=json&url="+pageURL.toString
    val getTitle: String = {
        Http(url(apiURL.toString) ># {
            json => json \ "title"
        }).values.toString
    }
    val getPlayerURL: URL = {
        new URL("http://www.dailymotion.com/embed/video/"+getVideoID)
    }
    val getThumbnailURL: URL = {
        new URL(Http(url(apiURL.toString) ># {
            json => json \ "thumbnail_url"
        }).values.toString.replace("large", "medium"))
    }
}

class VimeoEmbeddedVideo(pageURL: URL) extends EmbeddedVideo(pageURL) {
    private val getVideoID: String = {
        pageURL.getPath.substring(1)
    }
    val apiURL = "http://vimeo.com/api/v2/video/"+getVideoID+".json"
    val getTitle: String = {
        Http(url(apiURL.toString) ># {
            json => json \ "title"
        }).values.toString
    }
    val getPlayerURL: URL = {
        new URL("http://player.vimeo.com/video/"+getVideoID)
    }
    val getThumbnailURL: URL = {
        new URL(
            Http(url(apiURL.toString) ># {
                json => json \ "thumbnail_medium"
            }).values.toString)
    }
}


object EmbeddedVideo {
    def apply(pageURL: String) = {
        val embeddedVideo = for {
            validPageURL <- tryo(new URL(pageURL))
            v <- validPageURL.getHost match {
                case "youtube.com" |
                     "www.youtube.com"      => Some(tryo(new YoutubeEmbeddedVideo(validPageURL)))
                case "dailymotion.com" |
                     "www.dailymotion.com"  => Some(tryo(new DailymotionEmbeddedVideo(validPageURL)))
                case "vimeo.com" |
                     "www.vimeo.com"        => Some(tryo(new VimeoEmbeddedVideo(validPageURL)))
                case _ => None
            }
        } yield v

        embeddedVideo.get map (v => VideoData(
            v.getTitle,
            v.getPlayerURL.toString,
            v.getThumbnailURL.toString,
            pageURL.toString
        ))
    }
}

}
}