Module: Puppet::Icinga2::Utils

Defined in:
lib/puppet_x/icinga2/utils.rb

Overview

Module with methods to parse Icinga 2 DSL config

Class Method Summary collapse

Class Method Details

.attribute_types(attr) ⇒ Object 



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# File 'lib/puppet_x/icinga2/utils.rb', line 175

def self.attribute_types(attr)
  if %r{^[a-zA-Z0-9_]+$}.match?(attr)
    attr
  else
    "\"#{attr}\""
  end
end

.attributes(attrs, globals, consts, indent = 2) ⇒ Object 



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# File 'lib/puppet_x/icinga2/utils.rb', line 301

def self.attributes(attrs, globals, consts, indent = 2)
  # globals (params.pp) and all keys of attrs hash itselfs must not quoted
  @constants = globals.concat(consts.keys) << 'name'

  # select all attributes and constants if there value is a hash
  @hash_attrs = attrs.merge(consts).select { |_x, y| y.is_a?(Hash) }.keys

  # initialize returned configuration
  config = ''

  attrs.each do |attr, value_frozen|
    value = value_frozen.dup
    if value.is_a?(Puppet::Pops::Types::PSensitiveType::Sensitive)
      value = value.unwrap
      value = '-:"' + value + '"' if value.is_a?(String) && !@constants.include?(value)
    end

    if %r{^(assign|ignore) where$}.match?(attr)
      value.each do |x|
        config += "%{ind}%{att} %{expr}\n" % { ind: ' ' * indent, att: attr, expr: parse(x) } if x
      end
    elsif attr == 'vars'
      if value.is_a?(Hash)
        # delete pair of key '+' because a merge at this point is not allowed
        value.delete('+')
        config += process_hash(value, indent + 2, 1, '%{ind}%{att}.' % { ind: ' ' * indent, att: attr })
      elsif value.is_a?(Array)
        value.each do |item_frozen|
          item = item_frozen.dup
          if item.is_a?(String)
            config += "%{ind}%{att} += %{lst}\n" % { ind: ' ' * indent, att: attr, lst: item.sub(%r{^[\+,-]\s+}, '') }
          else
            item.delete('+')
            config += if item.empty?
                        "%{ind}%{att} += {}\n" % { ind: ' ' * indent, att: attr }
                      else
                        process_hash(item, indent + 2, 1, '%{ind}%{att}.' % { ind: ' ' * indent, att: attr })
                      end
          end
        end
      else
        op = '+' if %r{^\+\s+}.match?(value)
        config += "%{ind}%{att} #{op}= %{val}\n" % { ind: ' ' * indent, att: attr, val: parse(value.sub(%r{^\+\s+}, '')) }
      end
    else
      config += if value.is_a?(Hash)
                  op = '+' if value.delete('+')
                  if !value.empty?
                    "%{ind}%{att} #{op}= {\n%{lst}%{blnk}}\n" % { ind: ' ' * indent, att: attr, lst: process_hash(value, indent + 2), blnk: ' ' * indent }
                  else
                    "%{ind}%{att} #{op}= {}\n" % { ind: ' ' * indent, att: attr }
                  end
                elsif value.is_a?(Array)
                  op = value.delete_at(0) if value[0] == '+' || value[0] == '-'
                  "%{ind}%{att} #{op}= [ %{lst}]\n" % { ind: ' ' * indent, att: attr, lst: process_array(value) }
                elsif value.to_s =~ %r{^([\+,-])\s+}
                  # String: attr = '+ config' -> attr += config
                  "%{ind}%{att} #{Regexp.last_match(1)}= %{expr}\n" % { ind: ' ' * indent, att: attr, expr: parse(value.sub(%r{^[\+,-]\s+}, '')) }
                else
                  "%{ind}%{att} = %{expr}\n" % { ind: ' ' * indent, att: attr, expr: parse(value) }
                end
    end
  end
  config
end

.parse(row) ⇒ Object 



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# File 'lib/puppet_x/icinga2/utils.rb', line 183

def self.parse(row)
  row = row.to_s
  result = ''

  # parser is disabled
  if row =~ %r{^-:(.*)$}m
    return Regexp.last_match(1)
  end

  case row
  when %r{^\{{2}(.+)\}{2}$}m
    # scan function
    result += '{{%{expr}}}' % { expr: Regexp.last_match(1) }
  when %r{^(.+)\s([\+-]|\*|\/|==|!=|&&|\|{2}|in)\s\{{2}(.+)\}{2}$}m
    # scan expression + function (function should contain expressions, but we donno parse it)
    result += '%{expr} %{op} {{%{fct}}}' % { expr: parse(Regexp.last_match(1)), op: Regexp.last_match(2), fct: Regexp.last_match(3) }
  when %r{^(.+)\s([\+-]|\*|\/|==|!=|&&|\|{2}|in)\s(.+)$}
    # scan expression
    result += '%{expr1} %{op} %{expr2}' % { expr1: parse(Regexp.last_match(1)), op: Regexp.last_match(2), expr2: parse(Regexp.last_match(3)) }
  when %r{^(.+)\((.*)$}
    result += '%{fct}(%{param}' % { fct: Regexp.last_match(1), param: Regexp.last_match(2).split(',').map { |x| parse(x.lstrip) }.join(', ') }
  when %r{^(.*)\)(.+)?$}
    # closing bracket ) with optional access of an attribute e.g. '.arguments'
    result += '%{param})%{expr}' % { param: Regexp.last_match(1).split(',').map { |x| parse(x.lstrip) }.join(', '), expr: Regexp.last_match(2) }
  when %r{^\((.*)$}
    result += '(%{expr}' % { expr: parse(Regexp.last_match(1)) }
  when %r{^\s*\[\s*(.*)\s*\]\s?(.+)?$}
    # parse array
    result += '[ %{lst}]' % { lst: process_array(Regexp.last_match(1).split(',')) }
    result += ' %{expr}' % { expr: parse(Regexp.last_match(2)) } if Regexp.last_match(2)
  when %r{^\s*\{\s*(.*)\s*\}\s?(.+)?$}
    # parse hash
    result += "{\n%{expr}}" % { expr: process_hash(Hash[Regexp.last_match(1).gsub(%r{\s*=>\s*|\s*,\s*}, ',').split(',').each_slice(2).to_a]) }
    result += ' %{expr}' % { expr: parse(Regexp.last_match(2)) } if Regexp.last_match(2)
  else
    result += value_types(row.to_s.strip)
  end
  result.gsub(%r{" in "}, ' in ')
end

.process_array(items, indent = 2) ⇒ Object 



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# File 'lib/puppet_x/icinga2/utils.rb', line 223

def self.process_array(items, indent = 2)
  result = ''
  items.each do |value_frozen|
    value = value_frozen.dup
    if value.is_a?(Puppet::Pops::Types::PSensitiveType::Sensitive)
      value = value.unwrap
      value = '-:"' + value + '"' if value.is_a?(String)
    end
    if value.is_a?(Hash)
      result += "\n%{ind1}{\n%{expr}%{ind2}}, " % { ind1: ' ' * indent, expr: process_hash(value, indent + 2), ind2: ' ' * indent }
    elsif value.is_a?(Array)
      result += '[ %{lst}], ' % { lst: process_array(value, indent + 2) }
    elsif value
      result += '%{expr}, ' % { expr: parse(value) }
    end
  end
  result
end

.process_hash(attrs, indent = 2, level = 3, prefix = ' ' * indent) ⇒ Object 



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# File 'lib/puppet_x/icinga2/utils.rb', line 242

def self.process_hash(attrs, indent = 2, level = 3, prefix = ' ' * indent)
  result = ''
  attrs.each do |attr, value_frozen|
    value = value_frozen.dup
    if value.is_a?(Puppet::Pops::Types::PSensitiveType::Sensitive)
      value = value.unwrap
      value = '-:"' + value + '"' if value.is_a?(String)
    end
    result += if value.is_a?(Hash)
                op = '+' if value.delete('+')
                if value.empty?
                  case level
                  when 1 then
                    "%{pre}%{att} #{op}= {}\n" % { pre: prefix, att: attribute_types(attr) }
                  when 2 then
                    "%{pre}[\"%{att}\"] #{op}= {}\n" % { pre: prefix, att: attr }
                  else
                    "%{pre}%{att} #{op}= {}\n" % { pre: prefix, att: attribute_types(attr) }
                  end
                else
                  case level
                  when 1 then
                    process_hash(value, indent, 2, '%{pre}%{att}' % { pre: prefix, att: attr })
                  when 2 then
                    "%{pre}[\"%{att}\"] #{op}= {\n%{lst}%{ind}}\n" % { pre: prefix, att: attr, lst: process_hash(value, indent), ind: ' ' * (indent - 2) }
                  else
                    "%{pre}%{att} #{op}= {\n%{lst}%{ind}}\n" % { pre: prefix, att: attribute_types(attr), lst: process_hash(value, indent + 2), ind: ' ' * indent }
                  end
                end
              elsif value.is_a?(Array)
                op = value.delete_at(0) if value[0] == '+' || value[0] == '-'
                case level
                when 2 then
                  "%{pre}[\"%{att}\"] #{op}= [ %{lst}]\n" % { pre: prefix, att: attribute_types(attr), lst: process_array(value) }
                else
                  "%{pre}%{att} #{op}= [ %{lst}]\n" % { pre: prefix, att: attribute_types(attr), lst: process_array(value) }
                end
              else
                # String: attr = '+ value' -> attr += 'value'
                if value.to_s =~ %r{^([\+,-])\s+}
                  operator = "#{Regexp.last_match(1)}="
                  value = value.sub(%r{^[\+,-]\s+}, '')
                else
                  operator = '='
                end
                if value != :nil
                  if level == 3
                    "%{pre}%{att} #{operator} %{val}\n" % { pre: prefix, att: attribute_types(attr), val: parse(value) }
                  elsif level > 1
                    "%{pre}[\"%{att}\"] #{operator} %{val}\n" % { pre: prefix, att: attr, val: parse(value) }
                  else
                    "%{pre}%{att} #{operator} %{val}\n" % { pre: prefix, att: attr, val: parse(value) }
                  end
                end
              end
  end
  result
end

.value_types(value) ⇒ Object 



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# File 'lib/puppet_x/icinga2/utils.rb', line 166

def self.value_types(value)
  if value.match?(%r{^(-?\d+\.?\d*[dhms]?|true|false|null|\{{2}.*\}{2})$|^!?(host|service|user)\.}) ||
     @constants.index { |x| @hash_attrs.include?(x) ? value =~ %r{^!?(#{x})(\..+$|$)} : value =~ %r{^!?#{x}$} }
    value
  else
    value.dump
  end
end