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parkr/jekyll_6364.rb

Created Oct 20, 2017
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# This is a possible alternate solution to Jekyll #6364.
# All of these procs are translations of methods from Jekyll::Filters.
# Only item_property has been modified.
require "liquid"
input = { "government" => ["one post", "two post"], "tech" => ["three post"], "lol" => [1,2,3] }
as_liquid = -> (item) {
case item
when Hash
pairs = item.map { |k, v| as_liquid.([k, v]) }
Hash[pairs]
when Array
item.map { |i| as_liquid.(i) }
else
if item.respond_to?(:to_liquid)
liquidated = item.to_liquid
# prevent infinite recursion for simple types (which return `self`)
if liquidated == item
item
else
as_liquid.(liquidated)
end
else
item
end
end
}
item_property = -> (item, property) {
if item.respond_to?(:to_liquid)
property.to_s.split(".").reduce(item.to_liquid) do |subvalue, attribute|
p attribute
liquid = as_liquid.(subvalue)
liquid.respond_to?(attribute) ? liquid.public_send(attribute) : liquid[attribute]
end
elsif item.respond_to?(:data)
item.data[property.to_s]
else
item[property.to_s]
end
}
sort_input = -> (input, property, order) {
interim = input.map { |item| [item_property.(item, property), item] }
p interim
interim.sort! do |apple_info, orange_info|
apple_property = apple_info.first
orange_property = orange_info.first
if !apple_property.nil? && orange_property.nil?
- order
elsif apple_property.nil? && !orange_property.nil?
+ order
else
apple_property <=> orange_property
end
end
.map!(&:last)
}
sort = -> (input, property = nil, nils = "first") {
if input.nil?
raise ArgumentError, "Cannot sort a null object."
end
if property.nil?
input.sort
else
if nils == "first"
order = - 1
elsif nils == "last"
order = + 1
else
raise ArgumentError, "Invalid nils order: " \
"'#{nils}' is not a valid nils order. It must be 'first' or 'last'."
end
sort_input.(input, property, order)
end
}
p input
p sort.(input, "last.length")
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