Class: Study::TreeNode

Inherits:
Object
  • Object
show all
Defined in:
lib/study/tree_node.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type:, value:) ⇒ TreeNode

Returns a new instance of TreeNode.



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# File 'lib/study/tree_node.rb', line 5

def initialize(type:, value:)
  @type = type
  @value = value
end

Instance Attribute Details

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/study/tree_node.rb', line 3

def type
  @type
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/study/tree_node.rb', line 3

def value
  @value
end

Class Method Details

.convert(target, registered_objects: []) ⇒ Object 



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# File 'lib/study/tree_node.rb', line 135

def self.convert(target, registered_objects: [])
  if registered_objects.include?(target.object_id)
    return TreeNode.new(type: target.class.name, value: "DUPLICATE #{ target.class.name }")
  else
    if target.is_a?(Array) || target.is_a?(Hash) || target.instance_variables.size > 0
      registered_objects << target.object_id
    end
  end

  output = {
    type: nil,
    value: nil
  }

  target_class_name = target.class.name

  if target.is_a?(Hash)
    output_container = {}

    target.each do |hash_key, hash_value|
      output_container[hash_key] = convert(hash_value, registered_objects: registered_objects)
    end

    output[:value] = output_container

  elsif target.is_a?(Array)
    output_container = {}

    target.each_with_index do |array_value, index|
      output_container[index] = convert(array_value, registered_objects: registered_objects)
    end

    output[:value] = output_container

  elsif target.instance_variables.size > 0
    output_container = {}

    target.instance_variables.each do |name|
      value = target.instance_variable_get(name)
      key = name.to_s.gsub('@', '').to_sym

      # use getter method instead
      if target.public_methods(false).include?(key.to_sym)
        begin
          output_container[key] = convert(target.send(key.to_sym), registered_objects: registered_objects)
        rescue
          output_container[key] = convert(value, registered_objects: registered_objects)
        end  
      else
        output_container[key] = convert(value, registered_objects: registered_objects)
      end
    end

    output[:value] = output_container

  elsif target_class_name == "NilClass"
    output[:value] = "nil"

  elsif target_class_name == "IO"
    output[:value] = "<IO>"

  elsif target_class_name == "Thread::Mutex"
    output[:value] = "<Thread::Mutex>"

  elsif target_class_name == "Proc"
    output[:value] = "<Proc>"

  else
    output[:value] = target
    
  end

  output[:type] = target_class_name

  TreeNode.new(type: output[:type], value: output[:value])
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/study/tree_node.rb', line 10

def ==(other)
  @type == other.type && @value == other.value
end

#draw(indent: 0, tree_key: nil, branch_toggle: [], max_depth: 10, plain: false) ⇒ Object 



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# File 'lib/study/tree_node.rb', line 34

def draw(indent: 0, tree_key: nil, branch_toggle: [], max_depth: 10, plain: false)
  return if indent > max_depth

  if indent == 0
    if has_children?
      draw_line(indent: 0, 
                text: TextHighlight.yellow(@type, plain: plain), 
                branch_toggle: branch_toggle, 
                root: true,
                max_depth: max_depth,)

    else
      draw_line(indent: 0, 
                text: [TextHighlight.yellow(@type, plain: plain), TextHighlight.white(@value, plain: plain)].join(" "), 
                branch_toggle: branch_toggle, 
                root: true,
                max_depth: max_depth)

      return
    end
  end

  if has_children?
    if tree_key
      draw_line(indent: indent, 
                text: highlight(left: tree_key, right: @type, nested: true, plain: plain), 
                branch_toggle: branch_toggle,
                no_children: false,
                max_depth: max_depth,
                plain: plain)
    end

    each_child_with_last do |key, value, last|
      if value.is_a?(TreeNode)
        value.draw(indent: indent + 1, 
                   tree_key: key, 
                   branch_toggle: branch_toggle + [last], 
                   max_depth: max_depth,
                   plain: plain)
      else
        draw_line(indent: indent + 1,
                  text: highlight(left: key, right: value, plain: plain), 
                  branch_toggle: branch_toggle + [last], 
                  max_depth: max_depth,
                  plain: plain)
      end
    end
  else
    draw_line(indent: indent, 
              text: highlight(left: tree_key, right: @value, plain: plain), 
              branch_toggle: branch_toggle, 
              max_depth: max_depth,
              plain: plain)
  end

  nil
end

#draw_line(indent: 0, text:, branch_toggle:, root: false, no_children: true, max_depth: 10, plain: false) ⇒ Object 



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# File 'lib/study/tree_node.rb', line 111

def draw_line(indent: 0, text:, branch_toggle:, root: false, no_children: true, max_depth: 10, plain: false)
  if root
    puts text
  else
    previous, current = branch_toggle[0..-2], branch_toggle[-1]

    indent_lines = previous.map { |item| item ? "    " : "   │" }.join("")

    current_branch_line = current ? "   └── " : "   ├── "

    branch_lines = TextHighlight.green([indent_lines, current_branch_line].join(""), plain: plain)

    puts [branch_lines, text.force_encoding('UTF-8')].join("")

    if current && (no_children || (indent >= max_depth))
      puts TextHighlight.green([indent_lines].join(""), plain: plain)
    end
  end
end

#each_child_with_last(&block) ⇒ Object 



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# File 'lib/study/tree_node.rb', line 92

def each_child_with_last(&block)
  total_size = @value.size
  sorted_keys = @value.keys.sort

  sorted_number_keys = sorted_keys.select { |key| key.is_a?(Numeric) }.sort
  sorted_symbol_keys = sorted_keys.select { |key| key.is_a?(Symbol) }.sort
  sorted_string_keys = sorted_keys.select { |key| key.is_a?(String) }.sort
  remaining_keys = sorted_keys - sorted_number_keys - sorted_symbol_keys - sorted_string_keys
  remaining_keys = remaining_keys.sort rescue remaining_keys

  sorted_keys = sorted_number_keys + sorted_symbol_keys + sorted_string_keys + remaining_keys

  sorted_keys.each_with_index do |key, index|
    value = @value[key]

    block.call(key, value, total_size - 1 == index)
  end
end

#has_children? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/study/tree_node.rb', line 131

def has_children?
  ["Hash", "Array"].include?(@value.class.name) && @value.size > 0
end

#highlight(left: nil, right: nil, nested: false, plain: false) ⇒ Object 



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# File 'lib/study/tree_node.rb', line 14

def highlight(left: nil, right: nil, nested: false, plain: false)
  colored_left = left.is_a?(Integer) ? TextHighlight.violet(left, plain: plain) : TextHighlight.cyan(left, plain: plain)

  if nested
    [
      colored_left,
      TextHighlight.green(":", plain: plain),
      " ",
      TextHighlight.yellow(right, plain: plain)
    ].join("")
  else
    [
      colored_left,
      TextHighlight.green(":", plain: plain),
      " ",
      TextHighlight.white(right, plain: plain)
    ].join("")
  end     
end