Class: Bosh::Cli::HashChangeset

Inherits:
Object
  • Object
show all
Defined in:
lib/cli/changeset_helper.rb

Defined Under Namespace

Classes: FormatError

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HashChangeset

Returns a new instance of HashChangeset.



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# File 'lib/cli/changeset_helper.rb', line 9

def initialize
  @children = {}
  @values   = { :old => nil, :new => nil }
end

Instance Attribute Details

#values ⇒ Object

Returns the value of attribute values.



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# File 'lib/cli/changeset_helper.rb', line 7

def values
  @values
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 14

def [](key)
  @children[key.to_s]
end

#[]=(key, value) ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 22

def []=(key, value)
  @children[key.to_s] = value
end

#add_hash(hash, as) ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 26

def add_hash(hash, as)
  unless hash.is_a?(Hash)
    raise FormatError, "Trying to add #{hash.class} to a changeset, " +
        "Hash expected"
  end

  self.values[as] = hash

  hash.each_pair do |k, v|
    self[k] ||= HashChangeset.new
    self[k].values[as] = v

    if v.is_a?(Hash)
      self[k].add_hash(v, as)
    end
  end
end

#boolean?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cli/changeset_helper.rb', line 137

def boolean?(value)
  value.kind_of?(TrueClass) || value.kind_of?(FalseClass)
end

#diff(old_value, new_value, indent) ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 83

def diff(old_value, new_value, indent)
  old_value  = [old_value] unless old_value.kind_of?(Array)
  new_value  = [new_value] unless new_value.kind_of?(Array)

  added   = new_value - old_value
  removed = old_value - new_value

  lines = []

  # Ruby 1.8 has ugly Hash#to_s, hence the normalization

  removed.each do |line|
    line = line.inspect if line.is_a?(Hash)
    lines << "#{indent}- #{line}".make_red
  end

  added.each do |line|
    line = line.inspect if line.is_a?(Hash)
    lines << "#{indent}+ #{line}".make_green
  end

  lines.join("\n")
end

#each(&block) ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 48

def each(&block)
  @children.each_value { |v| yield v }
end

#keys ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 18

def keys
  @children.keys
end

#leaf? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cli/changeset_helper.rb', line 44

def leaf?
  @children.empty?
end

#new ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 111

def new
  @values[:new]
end

#old ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 107

def old
  @values[:old]
end

#state ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 115

def state
  if old.nil? && new.nil?
    :none
  elsif old.nil? && !new.nil?
    :added
  elsif !old.nil? && new.nil?
    :removed
  elsif old.class != new.class && !(boolean?(old) && boolean?(new))
    :mismatch
  elsif old == new
    :same
  else
    :changed
  end
end

#summary(level = 0) ⇒ Object 



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# File 'lib/cli/changeset_helper.rb', line 52

def summary(level = 0)
  indent = '  ' * level
  out = []

  @children.each_pair do |k, v|
    if v.state == :mismatch
      out << indent + "#{k} type changed: ".make_yellow +
          "#{v.old.class.to_s} -> #{v.new.class.to_s}"
      out << diff(v.old, v.new, indent + "  ")
    elsif v.leaf?
      case v.state
      when :added
        out << indent + "+ #{k}: ".make_yellow + v.new.to_s
      when :removed
        out << indent + "- #{k}: ".make_red + v.old.to_s
      when :changed
        out << indent + "± #{k}: ".make_yellow
        out << diff(v.old, v.new, indent + "  ")
      end
    else
      child_summary = v.summary(level + 1)

      unless child_summary.empty?
        out << indent + k
        out << child_summary
      end
    end
  end
  out
end