Created
September 28, 2016 15:24
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simple_html_parser
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| require 'memoist' | |
| class HTMLParser | |
| extend Memoist | |
| ReversedParser = /(?<after>[^>]*)>(?<tag>[^\/]+)\/<(?<body>.*?)>(?<tag_attr>[^>]*)\k<tag><(?<before>.*)/ | |
| attr_reader(:raw_string) | |
| def initialize(raw_string) | |
| @raw_string = raw_string.gsub("\n", "") | |
| end | |
| def reversed | |
| @raw_string.reverse | |
| end | |
| memoize(:reversed) | |
| def reverse_parsed | |
| ReversedParser.match(reversed) | |
| end | |
| memoize(:reverse_parsed) | |
| def parsed | |
| names = reverse_parsed.names | |
| captures= names.map(&:to_sym).zip(names.map{|name| reverse_parsed[name].reverse}) | |
| Hash[captures] | |
| end | |
| def body | |
| parsed[:body].strip | |
| end | |
| def before | |
| parsed[:before].strip | |
| end | |
| def after | |
| parsed[:after].strip | |
| end | |
| def tag_attr | |
| parsed[:tag_attr] | |
| end | |
| def _clean_string | |
| "#{before} #{body} #{after}" | |
| end | |
| def _content | |
| HTMLParser.new(_clean_string.strip) | |
| end | |
| memoize(:_content) | |
| def content | |
| if(reverse_parsed) | |
| _content.content | |
| else | |
| self | |
| end | |
| end | |
| end | |
| html_text = " | |
| <body this is a paragraph > | |
| <p> this is a paragraph </p> | |
| <ul> | |
| <li class='hello-world'> | |
| item1 | |
| </li> | |
| <li class='hello-world'> | |
| item2 | |
| </li> | |
| </ul> | |
| </body>" | |
| html = HTMLParser.new(html_text) | |
| html.content.raw_string == "this is a paragraph item1 item2" |
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