Class: Ea::Spa::Projector

Inherits:
Object
  • Object
show all
Defined in:
lib/ea/spa/projector.rb

Overview

One-way transform: Ea::Model::Document → SPA view artifacts.

The projector walks the model once and emits:

  • Skeleton (with package tree + per-classifier entries)
  • SearchIndex (flat searchable rows)
  • Shards (one per entity, generated lazily via #shard_for)

Sharding strategy is configurable via the shard_url_for proc — by default it produces "data/s/.json" paths matching the sharded output strategy.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(document, shard_url_for: nil, configuration: nil) ⇒ Projector

Returns a new instance of Projector.



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# File 'lib/ea/spa/projector.rb', line 18

def initialize(document, shard_url_for: nil, configuration: nil)
  @document = document
  @shard_url_for = shard_url_for || default_shard_url
  @configuration = configuration
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/ea/spa/projector.rb', line 16

def configuration
  @configuration
end

#document ⇒ Object (readonly)

Returns the value of attribute document.



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# File 'lib/ea/spa/projector.rb', line 16

def document
  @document
end

#shard_url_for ⇒ Object (readonly)

Returns the value of attribute shard_url_for.



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# File 'lib/ea/spa/projector.rb', line 16

def shard_url_for
  @shard_url_for
end

Instance Method Details

#each_shard ⇒ Object

Enumerate every (id, kind, shard) triple the SPA can address.



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# File 'lib/ea/spa/projector.rb', line 46

def each_shard
  return enum_for(:each_shard) unless block_given?

  document.classifiers.each { |c| yield shard_for(c) }
  document.packages.each { |p| yield shard_for(p) }
  document.diagrams.each { |d| yield shard_for(d) }
end

#search_index ⇒ Object 



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# File 'lib/ea/spa/projector.rb', line 33

def search_index
  SearchIndex.new(entries: build_search_entries)
end

#shard_for(model_element) ⇒ Object 



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# File 'lib/ea/spa/projector.rb', line 37

def shard_for(model_element)
  Shard.new(
    id: model_element.id,
    kind: kind_of(model_element),
    payload: payload_for(model_element)
  )
end

#skeleton ⇒ Object 



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# File 'lib/ea/spa/projector.rb', line 24

def skeleton
  Skeleton.new(
    metadata: metadata_hash,
    package_tree: build_package_tree,
    entries: build_entries,
    view_extras: view_extras
  )
end