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Contents
module ForestAdminDatasourceToolkit
module Components
module Query
class Sort < Array
def projection
Projection.new(map { |clause| clause[:field] })
end
def replace_clauses(...)
Sort.new(
map(...)
.reduce(Sort.new) do |memo, clause|
if clause.is_a?(Array) || clause.is_a?(self.class)
memo.union(clause)
else
memo.union([clause])
end
end
)
end
def nest(prefix)
if prefix&.length
self.class.new(map do |ob|
{ field: "#{prefix}:#{ob[:field]}", ascending: ob[:ascending] }
end)
else
self
end
end
def inverse
self.class.new(map { |ob| { field: ob[:field], ascending: !ob[:ascending] } })
end
def unnest
prefix = first[:field].split(':')[0]
raise 'Cannot unnest sort.' unless all? { |ob| ob[:field].start_with?(prefix) }
self.class.new(map do |ob|
{ field: ob[:field][prefix.length + 1, ob[:field].length - prefix.length - 1],
ascending: ob[:ascending] }
end)
end
def apply(records)
records.sort do |a, b|
comparison = 0
(0..length - 1).each do |i|
field = self[i][:field]
ascending = self[i][:ascending]
break unless comparison.zero?
value_on_a = ForestAdminDatasourceToolkit::Utils::Record.field_value(a, field)
value_on_b = ForestAdminDatasourceToolkit::Utils::Record.field_value(b, field)
comparison = value_on_a <=> value_on_b
comparison = 1 if comparison.nil?
comparison *= -1 unless ascending
end
comparison
end
end
end
end
end
end
Version data entries
59 entries across 59 versions & 1 rubygems