Class: SimpleHdGraph::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/simple-hd-graph/parser.rb

Overview

parse for YAML string

Constant Summary collapse

KEYWORD_ID = 
"id".freeze
KEYWORD_RESOURCES = 
"resources".freeze
KEYWORD_DEPENDS = 
"depends".freeze

Instance Method Summary collapse

Instance Method Details

#pack_depends_into_context(depends, context) ⇒ Object

Parameters:



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# File 'lib/simple-hd-graph/parser.rb', line 52

def pack_depends_into_context(depends, context)
  context.set_depends depends
end

#pack_resources_into_context(resources, context) ⇒ Object

Parameters:



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# File 'lib/simple-hd-graph/parser.rb', line 60

def pack_resources_into_context(resources, context)
  resources.each { |key, resource|
    rn = ResourceNode.new
    rn.load_with_context({id: context.id}, {key => resource})
    context << rn
  }
end

#parse(document) ⇒ Object

Parameters:

  • document (String) 


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# File 'lib/simple-hd-graph/parser.rb', line 15

def parse(document)
  contexts = []

  YAML.load_stream(document) do |node|
    next unless node

    context = nil
    resources = nil
    depends = nil

    node.each_pair { |key, value|
      case key
      when KEYWORD_ID
        context = ContextNode.new
        context.load({id: value})
      when KEYWORD_DEPENDS
        depends = value
      when KEYWORD_RESOURCES
        resources = value
      end
    }

    pack_depends_into_context(depends, context) if depends
    pack_resources_into_context(resources, context) if resources

    contexts << context
  end
  refill_relation(contexts)
  refill_depends(contexts)

  contexts.map { |context| context.freeze }.freeze
end

#refill_depends(contexts) ⇒ Object

Parameters:

  • context (Array) 


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# File 'lib/simple-hd-graph/parser.rb', line 80

def refill_depends(contexts)
  contexts.map { |context|
    if context.depends
      regularized = context.depends.map { |dependee|
        d = contexts.find { |c|
          c.alias == dependee
        }

        {
          context.id => d ? d.id : dependee
        }
      }
      context.set_depends regularized
    else
      context.set_depends []
    end
  }
end

#refill_relation(contexts) ⇒ Object

Parameters:

  • contexts (Array) 


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# File 'lib/simple-hd-graph/parser.rb', line 71

def refill_relation(contexts)
  contexts.each { |context|
    context.refill_relation
  }
end