Class: FHIR::Boot::Template

Inherits:
Object
  • Object
show all
Includes:
Hashable
Defined in:
lib/bootstrap/template.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Hashable

#from_hash, #to_hash

Constructor Details

#initialize(name = ['Template'], top_level = false) ⇒ Template

Returns a new instance of Template.



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# File 'lib/bootstrap/template.rb', line 14

def initialize(name=['Template'],top_level=false)
  @name = name
  @hierarchy = []
  @kind = nil
  @constants = {}
  @fields = []
  @templates = []
  @top_level = top_level
end

Instance Attribute Details

#constants ⇒ Object

Returns the value of attribute constants.



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# File 'lib/bootstrap/template.rb', line 9

def constants
  @constants
end

#fields ⇒ Object

Returns the value of attribute fields.



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# File 'lib/bootstrap/template.rb', line 10

def fields
  @fields
end

#hierarchy ⇒ Object

Returns the value of attribute hierarchy.



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# File 'lib/bootstrap/template.rb', line 7

def hierarchy
  @hierarchy
end

#kind ⇒ Object

Returns the value of attribute kind.



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# File 'lib/bootstrap/template.rb', line 8

def kind
  @kind
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/bootstrap/template.rb', line 6

def name
  @name
end

#templates ⇒ Object

Returns the value of attribute templates.



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# File 'lib/bootstrap/template.rb', line 11

def templates
  @templates
end

#top_level ⇒ Object

Returns the value of attribute top_level.



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# File 'lib/bootstrap/template.rb', line 12

def top_level
  @top_level
end

Instance Method Details

#get_metadata ⇒ Object 



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# File 'lib/bootstrap/template.rb', line 24

def get_metadata
  metadata = {}
  @fields.each do |field|
    if metadata.keys.include?(field.name)
      # this field has already been declared, so we're dealing
      # with a `slice` which we'll track with an array.
      x = field.serialize
      x.delete('name')
      if metadata[field.name].is_a?(Array)
        metadata[field.name] << x
      else
        metadata[field.name] = [ metadata[field.name], x ]
      end
    else
      metadata[field.name] = field.serialize
      metadata[field.name].delete('name')
    end
  end
  metadata
end

#indent(level = 0, offset) ⇒ Object 



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# File 'lib/bootstrap/template.rb', line 135

def indent(level=0,offset)
  ' '*(offset) + '  '*(level)
end

#to_s(offset = 0) ⇒ Object 



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# File 'lib/bootstrap/template.rb', line 45

def to_s(offset=0)
  # create an array of Strings, one per line
  s = []
  # TODO insert copyright statement
  # always declare the FHIR module
  s << 'module FHIR' if @top_level

  @name.each_with_index do |name, index|
    space = indent(index+1,offset)
    type = 'module'
    type = 'class' if index==@name.length-1
    classdef = "#{space}#{type} #{name}"
    classdef += " < FHIR::Model" if type == 'class'
    s << classdef
  end

  # include modules
  space = indent(@name.length+1,offset)
  s << "#{space}include FHIR::Hashable" if(@name.length > 0)
  s << "#{space}include FHIR::Json" if(@name.length > 0)
  s << "#{space}include FHIR::Xml" if(@name.length > 0)
  s << ''

  # add mandatory METADATA constant
  metadata = get_metadata
  @constants['METADATA'] = metadata if !metadata.empty?

  # add constants
  @constants.each do |constant,value|
    if value.is_a?(Hash)
      s << "#{space}#{constant.upcase} = {"
      value.each do |k,v|
        s << "#{space}  '#{k}' => #{v},"
        # Replace wildcard string with Infinity constant
        s[-1].gsub!('"max"=>"*"','"max"=>Float::INFINITY')
        s[-1].gsub!('"','\'')
      end
      s[-1] = s[-1][0..-2] # remove the trailing comma
      s << "#{space}}"
    else
      s << "#{space}#{constant.upcase} = #{value}"
    end
  end
  s << ''

  # add internal nested classes
  @templates.each do |template|
    s << template.to_s(space.length-2)
    s << ''          
  end

  # calculate the longest field name for whitespace layout
  max_name_size = 0
  @fields.each do |f| 
    name = f.local_name || f.name
    max_name_size=name.length if(name.length > max_name_size)
  end
  max_name_size += 1

  # declare attributes
  @fields.each do |field|
    s << "#{space}attr_accessor :"
    local_name = field.local_name || field.name
    s[-1] << ("%-#{max_name_size}s" % "#{local_name}")
    # add comment after field declaration
    s[-1] << "# #{field.min}-#{field.max} "
    s[-1] << "[ " if(field.max.to_i > 1 || field.max=='*')
    s[-1] << field.type
    if field.type=='Reference'
      s[-1] << "(#{ field.type_profiles.map{|p|p.split('/').last}.join('|') })"
    end
    s[-1] << " ]" if(field.max.to_i > 1 || field.max=='*')          
  end

  if @top_level && @kind=='resource'
    s << ''
    s << "#{space}def resourceType"
    s << "#{space}  '#{@name.first}'"
    s << "#{space}end"
  end

  # close all the class and module declarations
  (0..@name.length-1).reverse_each do |index|
    space = indent(index+1,offset)
    s << "#{space}end"          
  end
  s << 'end' if @top_level
  s.join("\n")
end