Class: FeedReader

Inherits:
Object
  • Object
show all
Defined in:
lib/imap-feeder/feedreader.rb

Constant Summary collapse

DEFAULT_ENCODING = 
"UTF-8"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(feed_url) ⇒ FeedReader

Returns a new instance of FeedReader.



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# File 'lib/imap-feeder/feedreader.rb', line 21

def initialize(feed_url)
  @feed_url = feed_url
  @feed = SimpleRSS.parse(open(feed_url))

  @encoding = @feed.source[/encoding=["'](.*?)["']/, 1]
  if not @encoding
    $log.info "No encoding found for #{feed_url}, defaulting to #{DEFAULT_ENCODING}."
    @encoding = DEFAULT_ENCODING
  end
end

Instance Attribute Details

#messages ⇒ Object (readonly)

Returns the value of attribute messages.



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# File 'lib/imap-feeder/feedreader.rb', line 17

def messages
  @messages
end

Instance Method Details

#conv(str) ⇒ Object 



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# File 'lib/imap-feeder/feedreader.rb', line 32

def conv(str)
  Iconv.iconv(DEFAULT_ENCODING, @encoding, str).first
rescue Iconv::IllegalSequence => e
  $log.error "IConv reports an IllegalSequence: #{e.message} from #{str}"
  return str
end

#get_new(archive) ⇒ Object 



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# File 'lib/imap-feeder/feedreader.rb', line 43

def get_new(archive)
  return [] if not @feed

  archive ||= []
  if archive.include?("")
    $log.warn "Title is empty, that should never happen! Aborting #{@feed_url}."
    return []
  end

  messages = []
  @feed.entries.each do |item|

    body = conv(item.content_encoded || item.content ||
                item.summary || item.description)
    message = Message.new(
      :title => conv(item.title),
      :time => time_from(item),
      :body => body,
      :from => conv(item.author),
      :url => conv(item.link)
    )

    item_identifier = message.generate_identifier

    if archive.include? item_identifier
      short_name = message.title[0..30]
      short_name << "…" if message.title.length > 30
      $log.debug "Already have '#{short_name}'."
    else
      messages << message
    end
  end

  messages
end

#number_of_entries ⇒ Object 



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# File 'lib/imap-feeder/feedreader.rb', line 39

def number_of_entries
  @feed.entries.size
end

#time_from(item) ⇒ Object 



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# File 'lib/imap-feeder/feedreader.rb', line 79

def time_from item
  return nil if not item
  item.published || item.pubDate || item.date_published || item.updated || nil
end