add rake task download_post

Rakefile

@@ -1,18 +1,55 @@
 require "rubygems"
+require "pry-byebug"
+require 'nokogiri'
+require 'uri'
 
-task :parse_file do
-  require 'nokogiri'
-  filename = ENV['f']
-  outputname = ENV['o']
-  f = File.read(filename)
-  doc = Nokogiri::Slop(f)
-  header = <<-HEADER
+def header(layout: "page")
+  <<-HEADER
+---
+layout: #{layout}
+title: 
+---
+HEADER
+end
+
+def post_header(time)
+  <<-HEADER
 ---
-layout: page
+layout: post
 title: 
+date: #{time}
+comments: true
+paginate: true
+categories: [Swift blog, Swift, Xcode]
 ---
 HEADER
+end
+
+def parse_article(filename)
+  f = File.read(filename)
+  doc = Nokogiri::Slop(f)
   html = doc.css('article').children.to_html
-  File.write(outputname,header+html)
+  html
+end
+
+task :parse_file do
+  filename = ENV['f']
+  outputname = ENV['o']
+  parsed_html = parse_article(filename)
+  File.write(outputname,header + parsed_html)
 end
 
+task :download_post do
+  url = ENV['url']
+  `aria2c -s 16 -x 16 -j 16 #{url}`
+  uri = URI(url)
+  filename = File.basename(uri.path)
+  origin_post_filename = "_origin_posts/#{filename}.html"
+  `mv index.html.1 #{origin_post_filename}`
+  html = parse_article(origin_post_filename)
+  doc = Nokogiri::HTML(html)
+  ts = doc.css('time').attribute('datetime').value
+  t = DateTime.parse(ts)
+  outputname = "_posts/"+ t.strftime("%Y-%m-%d") + "-#{filename}.html"
+  File.write(outputname, post_header(t)+html)
+end