Class: Coelacanth::Extractor::MarkdownListingCollector

Inherits:
Object
  • Object
show all
Defined in:
lib/coelacanth/extractor/markdown_listing_collector.rb

Overview

Extracts structured listings from Markdown content.

Constant Summary collapse

LIST_ITEM_PATTERN = 
/\A(?:[-*+]|\d+\.)\s+/.freeze
HEADING_PATTERN = 
/\A#+\s*/.freeze
MIN_ITEMS = 
3
MIN_TITLE_LENGTH = 
2

Instance Method Summary collapse

Instance Method Details

#call(markdown:, base_url: nil) ⇒ Object 



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# File 'lib/coelacanth/extractor/markdown_listing_collector.rb', line 14

def call(markdown:, base_url: nil)
  return [] if markdown.to_s.strip.empty?

  listings = []
  current = nil
  pending_heading = nil

  finalize_current = lambda do
    next unless current

    if current[:items].length >= MIN_ITEMS
      listings << { heading: current[:heading], items: current[:items] }
    end

    current = nil
  end

  markdown.each_line do |line|
    stripped = line.strip

    if stripped.empty?
      finalize_current.call
      next
    end

    if heading_line?(stripped)
      finalize_current.call
      pending_heading = normalize_heading(stripped)
      next
    end

    if list_item_line?(stripped)
      current ||= { heading: pending_heading, items: [] }
      pending_heading = nil

      if (item = build_item(stripped, base_url))
        current[:items] << item
      end
    else
      finalize_current.call
      pending_heading = nil
    end
  end

  finalize_current.call

  listings
end