Class: RssNotifier::App

Inherits:
Object
  • Object
show all
Defined in:
lib/rss_notifier/app.rb

Constant Summary collapse

CONFIG_DIR = 
Pathname.new('.')
CONFIG_FILE = 
CONFIG_DIR.join('config.yml')
DB_FILE = 
CONFIG_DIR.join('db.yml')

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(notify: false) ⇒ App

Returns a new instance of App.



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# File 'lib/rss_notifier/app.rb', line 39

def initialize(notify: false)
  @config = RssNotifier::Config.load(CONFIG_FILE)
  @db = RssNotifier::Db.load(DB_FILE)
  @notify = []
  @options = {
    notify: notify
  }
  @html_coder = HTMLEntities.new

  setup_notify(@config.notify)
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/rss_notifier/app.rb', line 19

def options
  @options
end

Class Method Details

.init(force: false) ⇒ Object 



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# File 'lib/rss_notifier/app.rb', line 22

def self.init(force: false)
  if !Dir.exists?(CONFIG_DIR.to_s) || force
    RssNotifier.logger.info("Creating #{CONFIG_DIR}")
    FileUtils.mkdir_p(CONFIG_DIR.to_s)
  else
    RssNotifier.logger.info("Directory #{CONFIG_DIR} already exists, skipping")
  end

  if !File.exists?(CONFIG_FILE) || force
    RssNotifier.logger.info("Creating #{CONFIG_FILE}")
    config = RssNotifier::Config.default
    config.save_to(CONFIG_FILE)
  else
    RssNotifier.logger.info("File #{CONFIG_FILE} already exists, skipping")
  end
end

Instance Method Details

#check_rss! ⇒ Object 



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# File 'lib/rss_notifier/app.rb', line 79

def check_rss!
  changed_items = []

  rss_urls_from_config.each do |url, name|
    RssNotifier.logger.info "Checking #{name} | #{url}"

    feed = @db.get_feed(url: url, name: name)

    rss_raw = nil
    response = nil
    begin
      headers = {}
      max_cache_duration = 20*60 # 20 minutes
      if feed.last_modified
        headers['If-Modified-Since'] = feed.last_modified.utc.httpdate
      end
      headers['Cache-Control'] = 'no-cache'
      response = HTTP.headers(headers).get(url)

      if response.code == 304
        RssNotifier.logger.info "Not modified since #{feed.last_modified}: #{name} | #{url}"
        next
      elsif response.code != 200
        RssNotifier.logger.warn "got non 200 code: #{response.code}:"
        puts response.body.to_s
        next
      end

      feed.last_modified = Time.parse(response.headers['Last-Modified'])

      raw_encoded = response.to_s.encode('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
      rss_raw = RSS::Parser.parse(raw_encoded)
    rescue => e
      RssNotifier.logger.warn "Cannot parse RSS: #{e}"
      puts e.backtrace
      next
    end

    rss_raw.items.each do |raw_item|
      item = feed.find_or_create_item(link: raw_item.link)
      item.update({
        title: decode_html(raw_item.title),
        description: decode_html(raw_item.description),
        date: raw_item.date
      })
      changed_items << item if item.changed?
    end

    feed.save
  end

  if changed_items.empty?
    RssNotifier.logger.info 'No changes'
    return
  end

  if options[:notify]
    RssNotifier.logger.info "#{changed_items.size} items changed, notifing..."

    changed_items.each do |item|
      notify!(item)
    end
  else
    RssNotifier.logger.info "#{changed_items.size} items changed"
  end
end

#decode_html(encoded) ⇒ Object 



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# File 'lib/rss_notifier/app.rb', line 146

def decode_html(encoded)
  @html_coder.decode(encoded)
rescue => e
  encoded
end

#notify!(item) ⇒ Object 



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# File 'lib/rss_notifier/app.rb', line 152

def notify!(item)
  @notify.each do |notify|
    begin
      notify.notify(item)
    rescue => e
      puts "#{e}: #{item.link} | #{notify}"
      puts e.backtrace
    end
  end
end

#rss_urls_from_config ⇒ Array

Returns of tuples (url, name).

Returns:

  • (Array) —

    of tuples (url, name)



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# File 'lib/rss_notifier/app.rb', line 73

def rss_urls_from_config
  @rss_urls_from_config ||= @config.rss_urls.map do |o|
    [ o[:url].to_s.strip, o[:name].to_s.strip ]
  end.to_h
end

#run ⇒ Object 



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# File 'lib/rss_notifier/app.rb', line 64

def run
  loop do
    check_rss!
    RssNotifier.logger.info "Waiting for #{@config.period_in_minutes} minutes"
    sleep @config.period_in_minutes * 60
  end
end

#setup_notify(notify) ⇒ Object 



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# File 'lib/rss_notifier/app.rb', line 51

def setup_notify(notify)
  notify.each do |d|
    next unless d[:enabled]
    if d[:adapter] == 'email'
      @notify << Adapter::Email.new(d[:email], @config)
    elsif d[:adapter] == 'pushbullet'
      @notify << Adapter::Pushbullet.new(d[:name], d[:access_token])
    else
      raise "Unknown adapter #{d[:adapter]}"
    end
  end
end