added methods to download the modified metadata file

classes/nvd_downloader.rb

@@ -5,18 +5,18 @@ require 'json'
 
 module NvdTools
   class NvdDownloader
-    attr_accessor :version, :base_url, :base_filename, :years, :filenames_json, :client
+    attr_accessor :version, :base_url, :base_filename, :years, :filenames_json, :filenames_meta, :client
     
     MIN_YEAR = '2002'
     MAX_YEAR = '2019'
     AVAILABLE_YEARS = (MIN_YEAR..MAX_YEAR).to_a
-    GZIPPED_JSON_EXTENSION = 'json.gz'
     
     def initialize(client: NvdClient.new)
 
       @base_filename = "nvdcve-#{client.version}-"
       @years = self.years
-      @filenames_json = self.filenames(GZIPPED_JSON_EXTENSION)
+      @filenames_json = self.filenames('json.gz')
+      @filenames_meta = self.filenames('meta')
       @client = client
     end
     
@@ -75,12 +75,19 @@ module NvdTools
       # of all of the json.gz from each year + recent + modified json feeds
     end
     
-    def modified_meta
+    def modified_meta(filename)
+      file = filenames('meta').select do |name|
+        name == filename
+      end.first
+
+      r = client.get(file)
+      r.body.split("\r\n")
       # this should be a method that builds 
       # the modified filename with the meta file extension included
     end
     
     def check_metafile(metafile)
+
       # open the metafile, build a hash of k/v pairs of the data inside of the file
       # check each k/v pair against the file on disk
       # return a new hash with the same k as before, but the value being a boolean true or false if the value from the k/v pair