First commit for Boodoo_Books on _ebooks 3.0.0

- Use .env file for secrets/config values
 - Maintain follower/following parity periodically
 TODO:
  - Support banned terms (override #valid_tweet?)
  - Commands via DM (at least "tweet" command from owner should work)
  - Investigate (anti)social behavior more deeply
 THEN:
  - Spooling/wait-for-config state for post-deploy, pre-config
  - Archive/model creation post-deploy
  - Archive/model periodic refresh

boodoo.rb

@@ -0,0 +1,86 @@
+require 'twitter_ebooks'
+include Ebooks
+
+module Ebooks::Boodoo
+  # supports Ruby Range literal, Fixnum, or Float as string
+  def parse_num(value)
+    eval(value.to_s[/^\d+(?:\.{1,3})?\d*$/].to_s)
+  end
+
+  # Make expected/possible Range
+  def parse_range(value)
+    value = parse_num(value)
+    if value.nil?
+      value = nil
+    elsif !value.respond_to?(:to_a)
+      value = Range.new(value, value)
+    end
+    value
+  end
+
+  def parse_array(value, array_splitter=nil)
+    array_splitter ||= / *[,;]+ */
+    value.split(array_splitter).map(&:strip)
+  end
+end
+
+class Ebooks::TweetMeta
+  def is_retweet?
+    tweet.retweeted_status? || !!tweet.text[/^[RM]T[: ]/i]
+  end
+end
+
+class Ebooks::Boodoo::BoodooBot < Ebooks::Bot
+  # A rough error-catch/retry for rate limit, dupe fave, server timeouts
+  def catch_twitter
+    begin
+      yield
+    rescue Twitter::Error => error
+      @retries += 1
+      raise if @retries > @max_error_retries
+      if error.class == Twitter::Error::TooManyRequests
+        reset_in = error.rate_limit.reset_in
+        log "RATE: Going to sleep for ~#{reset_in / 60} minutes..."
+        sleep reset_in
+        retry
+      elsif error.class == Twitter::Error::Forbidden
+        # don't count "Already faved/followed" message against attempts
+        @retries -= 1 if error.to_s.include?("already")
+        log "WARN: #{error.to_s}"
+        return true
+      elsif ["execution", "capacity"].any?(&error.to_s.method(:include?))
+        log "ERR: Timeout?\n\t#{error}\nSleeping for #{@timeout_sleep} seconds..."
+        sleep @timeout_sleep
+        retry
+      else
+        log "Unhandled exception from Twitter: #{error.to_s}"
+        raise
+      end
+    end
+  end
+
+  # Override Ebooks::Bot#blacklisted? to ensure lower<=>lower check
+  def blacklisted?(username)
+    if @blacklist.map(&:downcase).include?(username.downcase)
+      true
+    else
+      false
+    end
+  end
+
+  # Follow new followers, unfollow lost followers
+  def follow_parity
+    followers = catch_twitter { twitter.followers(:count=>200).map(&:screen_name) }
+    following = catch_twitter { twitter.following(:count=>200).map(&:screen_name) }
+    to_follow = followers - following
+    to_unfollow = following - followers
+    twitter.follow(to_follow) unless to_follow.empty?
+    twitter.unfollow(to_unfollow) unless to_unfollow.empty?
+    @followers = followers
+    @following = following - to_unfollow
+    if !(to_follow.empty? || to_unfollow.empty?)
+      log "Followed #{to_follow.size}; unfollowed #{to_unfollow.size}."
+    end
+  end
+
+end