require "feedzirra"

require_relative "../repositories/story_repository"

require_relative "../repositories/feed_repository"

require_relative "../commands/feeds/find_new_stories"

class FetchFeed

def initialize(feed, feed_parser = Feedzirra::Feed, logger = nil)

@feed = feed

@parser = feed_parser

@logger = logger

end

def fetch

begin

raw_feed = @parser.fetch_and_parse(@feed.url)

new_entries_from(raw_feed).each do |entry|

StoryRepository.add(entry, @feed)

end

FeedRepository.update_last_fetched(@feed, raw_feed.last_modified)

FeedRepository.set_status(:green, @feed)

rescue Exception => ex

FeedRepository.set_status(:red, @feed)

@logger.error "Something went wrong when parsing #{@feed.url}: #{ex}" if @logger

end

end

private

def new_entries_from(raw_feed)

finder = FindNewStories.new(raw_feed, @feed.last_fetched, latest_url)

finder.new_stories

end

def latest_url

return @feed.stories.first.permalink unless @feed.stories.empty?

end

end