Class: Praxis::Mapper::SelectorGeneratorNode::FieldDependenciesNode

Inherits:
Object
  • Object
show all
Defined in:
lib/praxis/mapper/selector_generator.rb

Overview

FieldDependenciesNode, attached to a SelectorGeneratorNode, which will contain, for every field passed in (not properties, but fields), the list of property dependencies associated with them. If these property dependenceis are for the ‘local’ resource of the SelectorGeneratorNode, they’d be just an array of property names If a field is a property that is an association to another resource, the reference field will point to which other node it depends on (this node fields does not need to be one of the immediate tracks, but it could be further down the tracks SelectorGeneratorNode’s tree) In the case of references, any further resolution of dependencies from fields need to be continued in that track’s SelectorGenerator’s FieldDependenciesNode (recursively)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, selector_node:) ⇒ FieldDependenciesNode

Returns a new instance of FieldDependenciesNode.



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# File 'lib/praxis/mapper/selector_generator.rb', line 19

def initialize(name:, selector_node:)
  @name = name
  @fields = Hash.new do |hash, key|
    hash[key] = FieldDependenciesNode.new(name: key, selector_node: selector_node)
  end
  @deps = Set.new
  @references = nil
  # Field path, currently being processed
  @current_field = []
  @selector_node = selector_node
end

Instance Attribute Details

#deps ⇒ Object (readonly)

Returns the value of attribute deps.



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# File 'lib/praxis/mapper/selector_generator.rb', line 16

def deps
  @deps
end

#fields ⇒ Object (readonly)

Returns the value of attribute fields.



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# File 'lib/praxis/mapper/selector_generator.rb', line 16

def fields
  @fields
end

#references ⇒ Object

Returns the value of attribute references.



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# File 'lib/praxis/mapper/selector_generator.rb', line 17

def references
  @references
end

#selector_node ⇒ Object (readonly)

Returns the value of attribute selector_node.



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# File 'lib/praxis/mapper/selector_generator.rb', line 16

def selector_node
  @selector_node
end

Instance Method Details

#[](*path) ⇒ Object 



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# File 'lib/praxis/mapper/selector_generator.rb', line 53

def [](*path)
  @fields.dig(*path)
end

#add_local_dep(name) ⇒ Object 



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# File 'lib/praxis/mapper/selector_generator.rb', line 39

def add_local_dep(name)
  pointer = @current_field.empty? ? @fields[true] : @fields.dig(*@current_field)
  pointer.deps.add name
end

#dig ⇒ Object 



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# File 'lib/praxis/mapper/selector_generator.rb', line 49

def dig(...)
  @fields.dig(...)
end

#dump ⇒ Object

For spec/debugging purposes only



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# File 'lib/praxis/mapper/selector_generator.rb', line 58

def dump
  hash = {}
  hash[:deps] = @deps.to_a unless @deps.empty?
  unless @references.nil?
    # Point, using a simple string, that it references another node (just print the resource name)
    # We don't know how deep in the tree this will be, or if there are other nodes of the same resource
    # type, but it seems good enough for checking things in specs
    hash[:references] = "Linked to resource: #{@references.resource}"
  end
  field_deps = @fields.each_with_object({}) do |(name, node), h|
    dumped = node.dump
    h[name] = dumped unless dumped.empty?
  end
  hash[:fields] = field_deps unless field_deps.empty?
  hash
end

#end_field ⇒ Object 



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# File 'lib/praxis/mapper/selector_generator.rb', line 35

def end_field
  @current_field.pop
end

#save_reference(selector_node) ⇒ Object 



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# File 'lib/praxis/mapper/selector_generator.rb', line 44

def save_reference(selector_node)
  pointer = @current_field.empty? ? @fields[true] : @fields.dig(*@current_field)
  pointer.references = selector_node
end

#start_field(field_name) ⇒ Object 



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# File 'lib/praxis/mapper/selector_generator.rb', line 31

def start_field(field_name)
  @current_field.push field_name
end