Implement table styles

lib/notare/table_style.rb

@@ -0,0 +1,83 @@
+# frozen_string_literal: true
+
+module Notare
+  class TableStyle
+    attr_reader :name, :borders, :shading, :cell_margins, :align
+
+    BORDER_STYLES = %w[single double dotted dashed triple none nil].freeze
+    BORDER_POSITIONS = %i[top bottom left right insideH insideV].freeze
+    ALIGNMENTS = %i[left center right].freeze
+
+    def initialize(name, borders: nil, shading: nil, cell_margins: nil, align: nil)
+      @name = name
+      @borders = normalize_borders(borders)
+      @shading = normalize_color(shading)
+      @cell_margins = normalize_cell_margins(cell_margins)
+      @align = validate_align(align)
+    end
+
+    def style_id
+      name.to_s.split("_").map(&:capitalize).join
+    end
+
+    def display_name
+      name.to_s.split("_").map(&:capitalize).join(" ")
+    end
+
+    private
+
+    def normalize_borders(borders)
+      return nil if borders.nil?
+      return :none if borders == :none
+
+      # Check if it's a per-edge configuration
+      if borders.keys.any? { |k| BORDER_POSITIONS.include?(k) }
+        borders.transform_values { |v| normalize_single_border(v) }
+      else
+        # Single border config applied to all edges
+        normalize_single_border(borders)
+      end
+    end
+
+    def normalize_single_border(border)
+      return :none if border == :none || border[:style] == "none"
+
+      style = border[:style] || "single"
+      unless BORDER_STYLES.include?(style)
+        raise ArgumentError, "Invalid border style: #{style}. Use #{BORDER_STYLES.join(", ")}"
+      end
+
+      {
+        style: style,
+        color: normalize_color(border[:color]) || "000000",
+        size: border[:size] || 4
+      }
+    end
+
+    def normalize_color(color)
+      return nil if color.nil?
+
+      hex = color.to_s.sub(/^#/, "").upcase
+      return hex if hex.match?(/\A[0-9A-F]{6}\z/)
+
+      raise ArgumentError, "Invalid color: #{color}. Use 6-digit hex (e.g., 'FF0000')"
+    end
+
+    def normalize_cell_margins(margins)
+      return nil if margins.nil?
+
+      if margins.is_a?(Hash)
+        margins.slice(:top, :bottom, :left, :right)
+      else
+        margins.to_i
+      end
+    end
+
+    def validate_align(align)
+      return nil if align.nil?
+      return align if ALIGNMENTS.include?(align)
+
+      raise ArgumentError, "Invalid alignment: #{align}. Use #{ALIGNMENTS.join(", ")}"
+    end
+  end
+end