Class: Yerba::Sequence

Inherits:
Object
  • Object
show all
Includes:
Enumerable, Node
Defined in:
lib/yerba/sequence.rb

Instance Attribute Summary

Attributes included from Node

#key, #location, #selector

Instance Method Summary collapse

Methods included from Node

#connected?, #document, #file_path, included, #line

Constructor Details

#initialize(array = nil) ⇒ Sequence

Returns a new instance of Sequence.



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# File 'lib/yerba/sequence.rb', line 8

def initialize(array = nil)
  init_node(nil, nil, nil, nil, nil, nil)

  @data = array.is_a?(Array) ? array : []
end

Instance Method Details

#<<(item) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 55

def <<(item)
  if connected?
    case item
    when Map
      document.insert_object(@selector, item.to_hash)
    when Hash
      document.insert_object(@selector, item)
    when Scalar
      document.insert(@selector, item.to_yaml)
    else
      formatted = format_for_insert(item.to_s)
      document.insert(@selector, formatted)
    end
  else
    @data << item
  end

  self
end

#[](index) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 14

def [](index)
  if connected?
    new_path = "#{@selector}[#{index}]"
    document[new_path]
  else
    @data[index]
  end
end

#collection_style ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 296

def collection_style
  @collection_style || document&.get_collection_style(@selector)
end

#collection_style=(style) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 300

def collection_style=(style)
  document&.set_collection_style(@selector, style)

  @collection_style = style
end

#concat(items) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 75

def concat(items)
  if connected?
    hashes = items.map do |item|
      case item
      when Map then item.to_hash
      when Hash then item
      else { value: item.to_s }
      end
    end

    document.insert_objects(@selector, hashes)
  else
    @data.concat(items)
  end

  self
end

#delete ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 261

def delete
  document&.delete(@selector)
end

#delete_at(index) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 233

def delete_at(index)
  document&.remove_at(@selector, index)

  self
end

#delete_if ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 239

def delete_if
  return enum_for(:delete_if) unless block_given?

  indices_to_remove = []

  length.times do |index|
    indices_to_remove << index if yield self[index]
  end

  indices_to_remove.reverse_each do |index|
    document&.remove_at(@selector, index)
  end

  self
end

#dig(*keys) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 38

def dig(*keys)
  if connected?
    keys.reduce(self) { |node, key| node.nil? ? nil : node[key] }
  else
    @data.dig(*keys)
  end
end

#each ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 93

def each
  return enum_for(:each) unless block_given?

  length.times { |index| yield self[index] }
end

#fetch(index) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 23

def fetch(index)
  if connected?
    new_path = "#{@selector}[#{index}]"
    result = document[new_path]

    if result.nil?
      raise IndexError, "index #{index} outside of sequence bounds: 0...#{length}"
    end

    result
  else
    @data.fetch(index)
  end
end

#find_by(selector = nil, value = nil, **criteria) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 99

def find_by(selector = nil, value = nil, **criteria)
  index = index_of(selector, value, **criteria)

  self[index] if index
end

#first ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 219

def first
  self[0]
end

#index_of(selector = nil, value = nil, **criteria) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 124

def index_of(selector = nil, value = nil, **criteria)
  if selector && value.nil? && criteria.empty?
    all_values = document&.value_at(@selector)

    return nil unless all_values.is_a?(Array)

    return all_values.index(selector.to_s)
  end

  criteria[selector] = value if selector && value
  pairs = expand_nested_criteria(criteria)

  indices = nil

  pairs.each do |field, expected|
    field_string = field.to_s

    if field_string.include?("[]")
      matching = nested_indices_for(field_string, expected)
    else
      all_values = document&.value_at(@selector)

      next unless all_values.is_a?(Array)

      matching = all_values.each_with_index.filter_map do |item, index|
        next unless item.is_a?(Hash)

        actual = dig_into(item, field_string)
        index if actual.to_s == expected.to_s
      end
    end

    indices = indices ? indices & matching : matching
  end

  indices&.first
end

#indices_of(selector = nil, value = nil, **criteria) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 162

def indices_of(selector = nil, value = nil, **criteria)
  if selector && value.nil? && criteria.empty?
    all_values = document&.value_at(@selector)

    if all_values.is_a?(Array)
      return all_values.each_with_index.filter_map { |actual, index| index if actual.to_s == selector.to_s }
    end

    return []
  end

  criteria[selector] = value if selector && value
  pairs = expand_nested_criteria(criteria)

  indices = nil

  pairs.each do |field, expected|
    field_string = field.to_s

    if field_string.include?("[]")
      matching = nested_indices_for(field_string, expected)
    else
      all_values = document&.value_at(@selector)

      next unless all_values.is_a?(Array)

      matching = all_values.each_with_index.filter_map do |item, index|
        next unless item.is_a?(Hash)

        actual = dig_into(item, field_string)
        index if actual.to_s == expected.to_s
      end
    end

    indices = indices ? indices & matching : matching
  end

  indices || []
end

#inspect ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 284

def inspect
  list = items
  preview = list.first(5).map(&:inspect).join(", ")
  suffix = list.length > 5 ? ", ... (#{list.length} items)" : ""

  if @selector
    "#<Yerba::Sequence selector=#{@selector.inspect} [#{preview}#{suffix}]>"
  else
    "#<Yerba::Sequence [#{preview}#{suffix}]>"
  end
end

#last ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 223

def last
  self[length - 1] # rubocop:disable Style/NegativeArrayIndex
end

#length ⇒ Object Also known as: size 



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# File 'lib/yerba/sequence.rb', line 202

def length
  if connected?
    scalar_items = document.value_at("#{@selector}[]")

    if scalar_items.is_a?(Array) && !scalar_items.empty?
      scalar_items.length
    else
      data = document.value_at(@selector)

      data.is_a?(Array) ? data.length : 0
    end
  else
    @data.length
  end
end

#pluck(*fields) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 109

def pluck(*fields)
  return [] unless connected?

  all_values = document.value_at(@selector)
  return [] unless all_values.is_a?(Array)

  if fields.length == 1

    all_values.map { |item| item.is_a?(Hash) ? item[fields.first.to_s] : item }
  else

    all_values.map { |item| fields.map(&:to_s).map { |field| item.is_a?(Hash) ? item[field] : nil } }
  end
end

#remove(value) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 227

def remove(value)
  document&.remove(@selector, value.to_s)

  self
end

#sequence_indent ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 306

def sequence_indent
  @sequence_indent || document&.get_sequence_indent(@selector)
end

#sequence_indent=(style) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 310

def sequence_indent=(style)
  document&.set_sequence_indent(@selector, style)

  @sequence_indent = style
end

#sort(by: nil, case_sensitive: false) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 255

def sort(by: nil, case_sensitive: false)
  document&.sort(@selector, by: by, case_sensitive: case_sensitive)

  self
end

#to_a ⇒ Object Also known as: to_ary 



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# File 'lib/yerba/sequence.rb', line 269

def to_a
  @data || items
end

#to_yaml ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 274

def to_yaml
  items.map do |item|
    case item
    when Scalar then "- #{item.to_yaml}"
    when Map then "- #{item.to_yaml.gsub("\n", "\n  ")}"
    else "- #{item}"
    end
  end.join("\n")
end

#value ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 265

def value
  items
end

#value_at(index) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 46

def value_at(index)
  if connected?
    new_path = "#{@selector}[#{index}]"
    document.value_at(new_path)
  else
    @data[index]
  end
end

#where(selector = nil, value = nil, **criteria) ⇒ Object 



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# File 'lib/yerba/sequence.rb', line 105

def where(selector = nil, value = nil, **criteria)
  QueryResult.new(self, indices_of(selector, value, **criteria))
end