Class: TOCBot

Inherits:
Object
  • Object
show all
Defined in:
lib/TOCBot.rb,
lib/TOCBot/version.rb

Overview

To follow

Constant Summary collapse

VERSION = 
'0.1.0'.freeze

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ TOCBot

Returns a new instance of TOCBot.



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

def initialize(options = {})
    @separator = '<!--TOC-->'

    @separator = options[:separator] unless options[:separator].nil?
end

Instance Method Details

#load_file(filename) ⇒ Object 



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# File 'lib/TOCBot.rb', line 13

def load_file(filename)
    lines = []

    begin
        lines = File.readlines(filename).each(&:chomp!)
    rescue SystemCallError
        raise StandardError.new("Failed to open file #{filename} for reading")
    end
    return lines
end

#process_file(filename) ⇒ Object 



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# File 'lib/TOCBot.rb', line 99

def process_file(filename)
    lines = load_file(filename)

    processed, toc = process_lines(lines)

    write_file(filename, processed, toc)
end

#process_lines(lines) ⇒ Object 



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# File 'lib/TOCBot.rb', line 46

def process_lines(lines)
    processed = []
    toc = []

    skip_code_block = false
    strip_existing_toc = false
    lines.each do |line|
        line = line.strip

        #
        # Identify code blocks and ignore the contents
        #
        skip_code_block = !skip_code_block if line.start_with?('```')

        if skip_code_block
            processed << line
            next
        end

        #
        # Identify open/closing <!--TOC--> tags
        #
        strip_existing_toc = !strip_existing_toc if line == @separator

        #
        # Skip over effectively removing the existing TOC
        #
        next if strip_existing_toc && line.downcase != @separator.downcase

        #
        # Strip out relative links
        #
        next if line.start_with?('<a name="')

        if line.scan(/^\#{1,}.*/m).size.positive?
            m = line.match(/^(\#{1,})(.*)/)
            hashes = m[1].length
            text = m[2].strip

            link = text.gsub(/ /, '-').downcase

            toc << '     ' * (hashes - 1) + "* [#{text}](##{link})"
            processed << "<a name=\"#{link}\"></a>"
        end

        #
        # Add the line to array - but also process it to see if it needs to go into the TOC
        #
        processed << line
    end
    return processed, toc
end

#write_file(filename, processed, toc_list, permissions = 0o0644) ⇒ Object 



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# File 'lib/TOCBot.rb', line 24

def write_file(filename, processed, toc_list, permissions = 0o0644)
    toc_done = false

    begin
        File.open(filename, 'w') do |f|
            processed.each do |line|
                f.puts line

                next unless line == @separator && !toc_done

                toc_list.each do |toc|
                    f.puts toc
                end
                toc_done = true
            end
            f.chmod(permissions)
        end
    rescue SystemCallError
        raise StandardError.new("Failed to open file #{filename} for writing")
    end
end