Class: AugustsFancyBlogPostParser

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cwd, path) ⇒ AugustsFancyBlogPostParser

Returns a new instance of AugustsFancyBlogPostParser.



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 63

def initialize(cwd, path)
  @path = path
  @cwd = cwd
  @url = "/" + @path[0...-(File.extname(@path).length)]
  reload!
end

Instance Attribute Details

#body ⇒ Object (readonly)

Returns the value of attribute body.



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 7

def body
  @body
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 6

def url
  @url
end

Class Method Details

.escape_html(html) ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 9

def self.escape_html(html)
  html
    .gsub(/&(?!\w+;)/, '&')
    .gsub(/</, '&lt;')
    .gsub(/>/, '&gt;')
    .gsub(/"/, '&quot;')
end

.format_code(code, lang) ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 30

def self.format_code(code, lang)
  if lang
    formatted = nil
    Open3.popen3("pygmentize", "-l", lang, "-f", "html", "-P", "nowrap=true") do |stdin, stdout, stderr, wait_thr|
      stdin.write(code)
      stdin.close_write

      lines = []
      until (line = stdout.gets).nil?
        lines.push(line)
      end

      formatted = lines.join("").rstrip
    end

    "<code class=\"highlight\">#{formatted}</code>"
  else
    "<code>" + escape_html(code) + "</code>"
  end
end

.parse_body(body) ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 70

def self.parse_body(body)
  chunks = separate_on(body, /\<code(.*?)\>(.*?)\<\/code\>/m)
  Parallel.map(chunks, :in_threads => chunks.length) do |chunk|
    case chunk
    when String
      chunk
    when MatchData
      attrs = parse_html_attrs(chunk[1])
      code = chunk[2]
      format_code(code, attrs["data-lang"])
    else
      raise ArgumentError.new("Unexpected chunk #{chunk.class}.")
    end
  end.join("")
end

.parse_html_attrs(attrs) ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 17

def self.parse_html_attrs(attrs)
  if attrs.empty?
    return {}
  else
    Nokogiri::HTML("<div#{attrs}></div>").css("div")[0].attributes.inject({}) do |prev, curr|
      key = curr[0]
      value = curr[1]
      prev[key] = value.value
      prev
    end
  end
end

.separate_on(str, re, result = []) ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 51

def self.separate_on(str, re, result = [])
  match_data = str.match(re)
  if match_data
    result.push(match_data.pre_match)
    result.push(match_data)
    separate_on(match_data.post_match, re, result)
  else
    result.push(str)
    result
  end
end

Instance Method Details

#display_date ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 121

def display_date
  timestamp.strftime("%B %d, %Y")
end

#html_date ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 117

def html_date
  timestamp.strftime("%Y-%m-%d")
end

#id ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 105

def id
  url.gsub("/", ":")
end

#reload! ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 86

def reload!
  html = File.read(@cwd + "/" + @path)

  @headers = {}
  num_header_chars = 0

  html.each_line.each do |line|
    if line =~ /[a-z]+\:./
      key, _, value = *line.partition(":")
      @headers[key] = value.chomp
      num_header_chars += line.length
    else
      break
    end
  end

  @body = self.class.parse_body(html[num_header_chars..-1])
end

#timestamp ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 113

def timestamp
  Time.parse(@headers["date"])
end

#title ⇒ Object 



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# File 'lib/augusts_fancy_blog_post_parser.rb', line 109

def title
  @headers["title"].strip
end