Class: FeedUtils::RssFeedBuilder

Inherits:
Object
  • Object
show all
Includes:
LogUtils::Logging
Defined in:
lib/feedutils/builder/rss.rb

Overview

todo/fix:

rename to Rss20FeedBuilder?? or FeedBuilderRss20 ??

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(rss_feed) ⇒ RssFeedBuilder

Returns a new instance of RssFeedBuilder.



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# File 'lib/feedutils/builder/rss.rb', line 11

def initialize( rss_feed )
  @feed = build_feed( rss_feed )
end

Class Method Details

.build(rss_feed) ⇒ Object 



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# File 'lib/feedutils/builder/rss.rb', line 19

def self.build( rss_feed )
  feed = self.new( rss_feed )
  feed.to_feed
end

Instance Method Details

#build_feed(rss_feed) ⇒ Object 



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# File 'lib/feedutils/builder/rss.rb', line 25

def build_feed( rss_feed )
  feed = Feed.new
  ## feed.object = rss_feed   # not use for now
  feed.format = "rss #{rss_feed.rss_version}"

  feed.title     = rss_feed.channel.title           # required
  feed.url       = rss_feed.channel.link            # required
  feed.summary   = rss_feed.channel.description     # required

  logger.debug "  rss | channel.description: >#{rss_feed.channel.description}< : #{rss_feed.channel.description.class.name}"

   # NOTE:
   # All date-times in RSS conform
   #   to the Date and Time Specification of RFC 822
   #  e.g. Sun, 19 May 2012 15:21:36 GMT  or
   #       Sat, 07 Sep 2013 00:00:01 GMT

  ## convert from time to to_datetime  (avoid errors on windows w/ builtin rss lib)

  feed.built     = rss_feed.channel.lastBuildDate.nil? ? nil : rss_feed.channel.lastBuildDate.to_datetime  # optional
  feed.published = rss_feed.channel.pubDate.nil?       ? nil : rss_feed.channel.pubDate.to_datetime     # optional

  logger.debug "  rss | channel.lastBuildDate: >#{rss_feed.channel.lastBuildDate}< : #{rss_feed.channel.lastBuildDate.class.name}"
  logger.debug "  rss | channel.pubDate: >#{rss_feed.channel.pubDate}< : #{rss_feed.channel.pubDate.class.name}"


  feed.generator = rss_feed.channel.generator       # optional

  logger.debug "  rss | channel.generator: >#{rss_feed.channel.generator}< : #{rss_feed.channel.generator.class.name}"


  items = []
  rss_feed.items.each do |rss_item|
    items << build_feed_item( rss_item )
  end
  feed.items = items

  feed # return new feed
end

#build_feed_item(rss_item) ⇒ Object 



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# File 'lib/feedutils/builder/rss.rb', line 65

def build_feed_item( rss_item )

  item = Item.new
  ## item.object = rss_item  # not use for now

  item.title     = rss_item.title
  item.url       = rss_item.link

  logger.debug "  rss | item.title: >#{rss_item.title}< : #{rss_item.title.class.name}"
  logger.debug "  rss | item.link: >#{rss_item.link}< : #{rss_item.link.class.name}"

## todo:
##  check if feedburner:origLink present - if yes, use it for url/link
##  example: use
##  - <feedburner:origLink>http://www.rubyflow.com/items/9803-gotta-ruby-s-syntax</feedburner:origLink></item>
##   instead of
##  - <link>http://feedproxy.google.com/~r/Rubyflow/~3/Ym9Sltg_2_c/9803-gotta-ruby-s-syntax</link>


  item.summary   = rss_item.description

  # check for <content:encoded>
  # -- using RSS 1.0 content module in RSS 2.0
  item.content = rss_item.content_encoded
  logger.debug "  rss | item.content_encoded[0..40]: >#{rss_item.content_encoded ? rss_item.content_encoded[0..40] : ''}< : #{rss_item.content_encoded.class.name}"

  # NOTE:
  # All date-times in RSS conform
  #   to the Date and Time Specification of RFC 822
  #  e.g. Sun, 19 May 2012 15:21:36 GMT  or
  #       Sat, 07 Sep 2013 00:00:01 GMT

  ## convert from time to to_datetime  (avoid errors on windows w/ builtin rss lib)

  item.published = rss_item.pubDate.nil? ? nil : rss_item.pubDate.to_datetime    # .utc.strftime( "%Y-%m-%d %H:%M" )

  logger.debug "  rss | item.pubDate: >#{rss_item.pubDate}< : #{rss_item.pubDate.class.name}"


  ## fix/todo: check if rss_item.guid present? !!!!
  ##
  ##  might be the case e.g. check lambda-the-ultimate.org, for example

  if rss_item.guid && rss_item.guid.content
    item.guid     = rss_item.guid.content
    logger.debug "  rss | item.guid.content: >#{rss_item.guid.content}< : #{rss_item.guid.content.class.name}"
  else
    item.guid     = rss_item.link
    logger.warn "  rss | item.guid.content missing !!!! - using link for guid"
  end

  ### todo: add support or authors (incl. dc:creator)
  ##  <dc:creator>Dhaivat Pandya</dc:creator>

  #  todo: categories
  # <category><![CDATA[Gems]]></category>
  # <category><![CDATA[Ruby]]></category>
  # <category><![CDATA[Ruby on Rails]]></category>


  item
end

#to_feed ⇒ Object 



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# File 'lib/feedutils/builder/rss.rb', line 15

def to_feed
  @feed
end