Class: EDI::E::Mapper

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/edi/mapper.rb

Direct Known Subclasses

OpenILS::Mapper

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ic_opts = {}) ⇒ Mapper

Returns a new instance of Mapper.



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# File 'lib/edi/mapper.rb', line 153

def initialize(ic_opts = {})
  # Bug in edi4r 0.9 -- sometimes :recipient is used; sometimes :recip. It doesn't
  # work. We'll override it.
  local_ic_opts = ic_opts.reject { |k,v| [:sender,:sender_qual,:recipient,:recipient_qual].include?(k) }
  @ic = EDI::E::Interchange.new(local_ic_opts || {})
  
  # Apply any envelope defaults.
  ['UNB','UNZ'].each { |seg|
    seg_defs = self.class.defaults[seg]
    if seg_defs
      seg_defs.each_pair { |cde,defs|
        segment = @ic.header[cde].first
        unless segment.nil?
          defs.each_pair { |de,val|
            segment[de][0].value = val
          }
        end
      }
    end
  }

  @ic.header.cS002.d0004 = ic_opts[:sender] unless ic_opts[:sender].nil?
  @ic.header.cS002.d0007 = ic_opts[:sender_qual] unless ic_opts[:sender_qual].nil?
  @ic.header.cS003.d0010 = ic_opts[:recipient] unless ic_opts[:recipient].nil?
  @ic.header.cS003.d0007 = ic_opts[:recipient_qual] unless ic_opts[:recipient_qual].nil?
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 210

def method_missing(sym, *args)
  if @ic.respond_to?(sym)
    @ic.send(sym, *args)
  else
    super(sym, *args)
  end
end

Instance Attribute Details

#defaults ⇒ Object

Returns the value of attribute defaults.



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# File 'lib/edi/mapper.rb', line 38

def defaults
  @defaults
end

#message ⇒ Object (readonly)

Returns the value of attribute message.



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# File 'lib/edi/mapper.rb', line 37

def message
  @message
end

Class Method Details

.defaults ⇒ Object 



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# File 'lib/edi/mapper.rb', line 46

def defaults
  @defaults || {}
end

.defaults=(value) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 50

def defaults=(value)
  unless value.is_a?(Hash)
    raise TypeError, "Mapper defaults must be in the form of a Hash"
  end
  @defaults = value
end

.find_mapping(name) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 77

def find_mapping(name)
  segment_handlers.find { |h|
    h[:re].match(name)
  }
end

.from_json(json, ic_opts = {}) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 100

def self.from_json(json, ic_opts = {})
  struct = Yajl::Parser.parse(json)

  json_opts = {}
  [:sender,:recipient].each { |party|
    party_info = struct[party.to_s]
    if party_info.is_a?(Hash)
      json_opts[party] = party_info['id']
      json_opts["#{party}_qual".to_sym] = party_info['id-qualifier']
    elsif party_info.is_a?(String)
      (id,qual) = party_info.split(/:/)
      json_opts[party] = id
      json_opts["#{party}_qual".to_sym] = qual
    end
  }
  
  json_msg_opts = {}
  if struct['msg_opts'].is_a?(Hash)
    struct['msg_opts'].each_pair { |k,v| json_msg_opts[k.to_sym] = v }
  end
  
  result = self.new(ic_opts.merge(json_opts))
  
  ['header','trailer'].each { |envseg|
    if struct[envseg]
      target = result.send(envseg.to_sym)
      struct[envseg].last.each_pair { |de,val|
        if val.is_a?(Hash)
          val.each_pair { |cde,sval|
            target[de][0][cde][0].value = sval
          }
        else
          target[de][0].value = val
        end
      }
    end
  }
  
  struct['body'].each { |msg_def|
    msg_def.each_pair { |msg_type, msg_body|
      if unh = msg_body.find { |s| s[0] == 'UNH' }
        version_info = unh[1]['S009']
        json_msg_opts[:resp_agency] = version_info['0051']
        json_msg_opts[:version] = version_info['0052']
        json_msg_opts[:release] = version_info['0054']
      end
      result.add_message(msg_type, json_msg_opts)
      result.add(msg_body)
    }
  }
  result.finalize
end

.map(name, expr = nil, &block) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 57

def map(name,expr = nil,&block)
  register_mapping(name,expr,block)
end

.register_mapping(name, expr, proc) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 61

def register_mapping(name, expr, proc)
  if segment_handlers.find { |h| h[:name] == name }
    raise NameError, "A pseudo-segment called '#{name}' is already registered"
  end
  if expr.nil?
    expr = Regexp.new("^#{name}$")
  end
  segment_handlers.push({:name => name,:re => expr,:proc => proc})
end

.unregister_mapping(name) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 71

def unregister_mapping(name)
  segment_handlers.delete_if { |h|
    h[:name] == name
  }
end

Instance Method Details

#add(*args) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 185

def add(*args)
  if args[0].is_a?(String)
    while args.length > 0
      add_segment(args.shift, args.shift)
    end
  elsif args.length == 1 and args[0].is_a?(Array)
    add(*args[0])
  else
    args.each { |arg|
      add(arg)
    }
  end
end

#add_message(msg_type, msg_opts = {}) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 180

def add_message(msg_type, msg_opts = {})
  @message = @ic.new_message( { :msg_type => msg_type, :version => 'D', :release => '96A', :resp_agency => 'UN' }.merge(msg_opts || {}) )
  @ic.add(@message,false)
end

#apply_mapping(name, value) ⇒ Object 



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# File 'lib/edi/mapper.rb', line 92

def apply_mapping(name, value)
  handler = self.class.find_mapping(name)
  if handler.nil?
    raise NameError, "Unknown pseudo-segment: '#{name}'"
  end
  handler[:proc].call(self, name, value)
end

#finalize ⇒ Object 



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# File 'lib/edi/mapper.rb', line 199

def finalize
  mode = @ic.output_mode
  @ic = EDI::E::Interchange.parse(StringIO.new(@ic.to_s))
  @ic.output_mode = mode
  return self
end

#to_s ⇒ Object 



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# File 'lib/edi/mapper.rb', line 206

def to_s
  @ic.to_s
end