Class: NetLinx::Workspace::YAML

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# File 'lib/netlinx/workspace/yaml.rb', line 9

def self.parse string
  yaml = ::YAML.load string
  yaml_systems = yaml['systems']
  
  workspace = NetLinx::Workspace.new
  
  if yaml_systems
    # Load systems into an implicit project and workspace.
    workspace.name = yaml_systems.first['name']
    project = NetLinx::Project.new name: yaml_systems.first['name']
    workspace << project
    
    parse_systems project, yaml_systems
  else
    # An explicit workspace is defined.
    workspace.name = yaml['name'] if yaml['name']
    workspace.description = yaml['description'] if yaml['description']
    
    yaml_projects = yaml['projects']
    yaml_projects.each do |yaml_project|
      workspace << NetLinx::Project.new.tap do |project|
        project.name           = yaml_project['name'] if yaml_project['name']
        project.designer       = yaml_project['designer'].to_s if yaml_project['designer']
        project.dealer         = yaml_project['dealer'].to_s if yaml_project['dealer']
        project.sales_order    = yaml_project['sales_order'].to_s if yaml_project['sales_order']
        project.purchase_order = yaml_project['purchase_order'].to_s if yaml_project['purchase_order']
        project.description    = yaml_project['description'] if yaml_project['description']
        
        parse_systems project, yaml_project['systems']
      end
    end
  end
  
  workspace.file = "#{workspace.name}.apw"
  
  # Ensure exactly one system in the workspace is set active.
  a_system_is_active = false
  workspace.projects.each do |project|
    project.systems.each do |system|
      if a_system_is_active
        system.active = false
        next
      else
        a_system_is_active = true if system.active
      end
    end
  end
  
  # No active systems. Set the first one active automatically.
  workspace.projects.first.systems.first.active = true \
    unless a_system_is_active \
    or workspace.projects.empty? \
    or workspace.projects.first.systems.empty?
  
  workspace
end