Class: MdToNotion::Lexer

Inherits:
Object
  • Object
show all
Includes:
Tokens
Defined in:
lib/md_to_notion/lexer.rb

Defined Under Namespace

Classes: InvalidTokenSyntaxError

Constant Summary collapse

ALLOWED_VIDEO_EMBED_URLS = 
[
  "https://user-images.githubusercontent.com/"
]

Constants included from Tokens

Tokens::BULLET_LIST, Tokens::CODE_BLOCK, Tokens::EMBED_FILE_REGEXES, Tokens::GH_EMBED_FILE, Tokens::HEADING_1, Tokens::HEADING_2, Tokens::HEADING_3, Tokens::IMAGE, Tokens::NUMBERED_LIST, Tokens::QUOTE

Instance Method Summary collapse

Methods included from Tokens

#bold, #bullet_list, #code, #code_block, #embeded_file, #heading_1, #heading_2, #heading_3, #image, #italic, #numbered_list, #paragraph, #quote, #strikethrough, #text, #tokenize_rich_text

Constructor Details

#initialize(markdown) ⇒ Lexer

Returns a new instance of Lexer.



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# File 'lib/md_to_notion/lexer.rb', line 15

def initialize(markdown)
  @markdown = markdown
  @tokens = []
  @stack = []
  @index = 0
end

Instance Method Details

#tokenize ⇒ Object 



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# File 'lib/md_to_notion/lexer.rb', line 22

def tokenize
  while @index < @markdown.length
    begin
      next_char = @markdown[@index]

      if next_char == " "
        @index += 1
        next @stack << " "
      elsif next_char == "#"
        tokenize_heading
      elsif next_char == "["
        tokenize_link
      elsif next_char == "!"
        tokenize_image
      elsif ALLOWED_VIDEO_EMBED_URLS.join("").include?(peek(41))
        tokenize_embeded_file
      elsif next_char == ">"
        tokenize_quote
      elsif next_char == "-"
        tokenize_bullet_list
      elsif next_char =~ /\d+/
        tokenize_numbered_list
      elsif next_char == "`" && peek(2) == "```"
        tokenize_block_code
      elsif next_char == "\n"
        @index += 1
      else
        tokenize_paragraph
      end
    rescue InvalidTokenSyntaxError
      tokenize_paragraph
    end

    @stack = []
  end

  @tokens
end