Module: Grably::Digest

Defined in:
lib/grably/core/digest.rb

Overview

Set of utilities to digest products and stat product set changes

Defined Under Namespace

Classes: ProductDigest

Class Method Summary collapse

Class Method Details

.build_diff(new_map, old_map) ⇒ Object 



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# File 'lib/grably/core/digest.rb', line 73

def build_diff(new_map, old_map)
  old_keys = old_map.keys.to_set
  new_keys = new_map.keys.to_set

  missing = old_keys - new_keys
  added = new_keys - old_keys

  updated = (old_keys & new_keys).reject do |product|
    old_map[product] == new_map[product]
  end

  [missing, added, updated]
end

.diff_digests(old_products, new_products) ⇒ deleted, ...

Given two lists of product digests find missing, changed, and added products

Returns:

  • (deleted, added, updated) 


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# File 'lib/grably/core/digest.rb', line 63

def diff_digests(old_products, new_products)
  # create maps of product sets
  old_map, new_map = [old_products, new_products].map do |products|
    return [] unless products
    Hash[*products.flat_map { |d| [d.product, d] }]
  end

  build_diff(new_map, old_map)
end

.differ?(old_products, new_products) ⇒ Boolean

Tells if two product digest lists are differ

Returns:

  • (Boolean) 


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# File 'lib/grably/core/digest.rb', line 88

def differ?(old_products, new_products)
  !diff_digests(old_products, new_products).flatten.empty?
end

.digest(*products) ⇒ Object 



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# File 'lib/grably/core/digest.rb', line 56

def digest(*products)
  products.map { |product| ProductDigest.of_product(product) }
end