Check for video, audio, picture content

gistfile1.coffee

$(document).ready ->
  $("#post_content").keyup ->
    urls = findUrls($("#post_content").text())
    youtube_pattern = ///http://(?:www\.)?youtu(?:be\.com/watch\?v=|\.be/)(\w*)(&(amp;)?[\w\?=]*)?///
    flickr_pattern = ///flickr.com\/photos///
    soundcloud_pattern = ///w.soundcloud.com///

    check_for_assets(youtube_pattern, urls, $("#post_has_video"))
    check_for_assets(flickr_pattern, urls, $("#post_has_picture"))
    check_for_assets(soundcloud_pattern, urls, $("#post_has_audio"))
    return

  findUrls = (text) ->
    source = (text or "").toString()
    urlArray = []
    url = undefined
    matchArray = undefined

    # Regular expression to find FTP, HTTP(S) and email URLs.
    regexToken = /(((ftp|https?):\/\/)[\-\w@:%_\+.~#?,&\/\/=]+)|((mailto:)?[_.\w-]+@([\w][\w\-]+\.)+[a-zA-Z]{2,3})/g

    # Iterate through any URLs in the text.
    while (matchArray = regexToken.exec(source)) isnt null
      token = matchArray[0]
      urlArray.push token
    urlArray

  check_for_assets = (source_pattern, urls_array, checkbox) ->
    source_present = false
    source_present = true if $.inArray(source_pattern, urls_array)
    console.log source_present, source_pattern, urls_array

    if source_present
      check(checkbox)
      source_present = false
    else
      uncheck(checkbox)
    return

  check = (checkbox) ->
    checkbox.prop('checked', true)

  uncheck = (checkbox) ->
    checkbox.prop('checked', false)

the problem is, they all end up as true...

 true /http:\/\/(?:www\.)?youtu(?:be\.com\/watch\?v=|\.be\/)(\w*)(&(amp;)?[\w\?=]*)?/ ["https://www.youtube.com/watch?v=9x5PjEN-0hw"]
posts-36a68be7f3de8186f423318246b44587.js?body=1:33 
true /flickr.com\/photos/ ["https://www.youtube.com/watch?v=9x5PjEN-0hw"]
posts-36a68be7f3de8186f423318246b44587.js?body=1:33 
true /w.soundcloud.com/ ["https://www.youtube.com/watch?v=9x5PjEN-0hw"]