Class: Flow

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root) ⇒ Flow

Returns a new instance of Flow.



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# File 'lib/args.rb', line 91

def initialize(root)
  @root = root
end

Instance Attribute Details

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/args.rb', line 89

def root
  @root
end

Instance Method Details

#add(arg) ⇒ Object 



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# File 'lib/args.rb', line 195

def add(arg)
  if @root.nil?
    @root = arg
  else
    iadd(arg, @root)
  end  
end

#find(elt) ⇒ Object 



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# File 'lib/args.rb', line 139

def find(elt)
  return ifind(elt, @root, {})
end

#iadd(arg, node) ⇒ Object 



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# File 'lib/args.rb', line 187

def iadd(arg, node)
  if node.next_node.nil?
    node.next_node = arg
  else
    iadd(arg, node.next_node)
  end      
end

#iargs(node, args) ⇒ Object 



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# File 'lib/args.rb', line 95

def iargs(node, args)
  if node.nil?
    return args
  end
  if (node.class == Arg)
    if node.value
      new_args = args.clone
      new_args[node.name] = node.value
      args = new_args
    end
    iargs(node.next_node, args)
  elsif (node.class == Decision)
    node.chosen.each { |child|
      return iargs(child, args)
    }
  end
end

#ifind(elt, node, args) ⇒ Object 



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# File 'lib/args.rb', line 113

def ifind(elt, node, args)
  if node.nil?
    return nil
  end
  if (node == elt)
    return args
  elsif (node.class == Arg)
    if node.value
      new_args = args.clone
      new_args[node.name] = node.value
      args = new_args
    end
    ifind(elt, node.next_node, args)
  elsif (node.class == Decision)
    found = false
    node.children.each { |child|
      result = ifind(elt, child, args)
      if (result)
        return result
      end
    }
    return nil
  end
end

#iset(name, value, node) ⇒ Object

return true for success false for unable to find arg name String for invalid arg



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# File 'lib/args.rb', line 147

def iset(name, value, node)
  if node.nil?
    return false
  end
  if (node.class == Arg )
    if (node.name == name)
      response = node.validate?(value)
      if (response.class == String)
        return response
      else
        node.value = value
        return true
      end
    else
      iset(name, value, node.next_node)
    end
  elsif (node.class == Decision)
    result = false
    node.children.each { |flow|
      response = iset(name, value, flow.root)
      if (response == true)
        result = true
      elsif (response.class == String)
        return response
      end
    }
    result
  end    
end

#parse(args) ⇒ Object 



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# File 'lib/args.rb', line 231

def parse(args)
  args.each { |arg|
    name, value = parse_line(arg)
    set(name, value)
  }
end

#parse_line(line) ⇒ Object 



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# File 'lib/args.rb', line 222

def parse_line(line)
  idx = line.index('=')
  if (idx)
    return line[0...idx], line[idx+1..-1]
  else
    line
  end
end

#print_flow(node) ⇒ Object 



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# File 'lib/args.rb', line 210

def print_flow(node)
  if node.nil?
    return
  end
  result = node.name + " - " + node.desc
  if (node.value)
    result += ":" + node.value
  end
  puts result
  print_flow(node.next_node)
end

#set(name, value) ⇒ Object 



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# File 'lib/args.rb', line 177

def set(name, value)
  response = iset(name, value, @root)
  if (response == false)
    puts "ERROR: could not find argument with name " + name
  elsif (response.class == String)
    puts "ERROR: " + response
  end
  response
end

#to_s ⇒ Object 



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# File 'lib/args.rb', line 203

def to_s
  args = iargs(@root, {})
  args.each { |name, value|
    puts name + ":" + value
  }
end