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|
# frozen_string_literal: true
module Liquid
module Utils
DECIMAL_REGEX = /\A-?\d+\.\d+\z/
UNIX_TIMESTAMP_REGEX = /\A\d+\z/
def self.slice_collection(collection, from, to)
if (from != 0 || !to.nil?) && collection.respond_to?(:load_slice)
collection.load_slice(from, to)
else
slice_collection_using_each(collection, from, to)
end
end
def self.slice_collection_using_each(collection, from, to)
segments = []
index = 0
# Maintains Ruby 1.8.7 String#each behaviour on 1.9
if collection.is_a?(String)
return collection.empty? ? [] : [collection]
end
return [] unless collection.respond_to?(:each)
collection.each do |item|
if to && to <= index
break
end
if from <= index
segments << item
end
index += 1
end
segments
end
def self.to_integer(num)
return num if num.is_a?(Integer)
num = num.to_s
begin
Integer(num)
rescue ::ArgumentError
raise Liquid::ArgumentError, "invalid integer"
end
end
def self.to_number(obj)
case obj
when Float
BigDecimal(obj.to_s)
when Numeric
obj
when String
DECIMAL_REGEX.match?(obj.strip) ? BigDecimal(obj) : obj.to_i
else
if obj.respond_to?(:to_number)
obj.to_number
else
0
end
end
end
def self.to_date(obj)
return obj if obj.respond_to?(:strftime)
if obj.is_a?(String)
return if obj.empty?
obj = obj.downcase
end
case obj
when 'now', 'today'
Time.now
when UNIX_TIMESTAMP_REGEX, Integer
Time.at(obj.to_i)
when String
Time.parse(obj)
end
rescue ::ArgumentError
nil
end
def self.to_liquid_value(obj)
# Enable "obj" to represent itself as a primitive value like integer, string, or boolean
return obj.to_liquid_value if obj.respond_to?(:to_liquid_value)
# Otherwise return the object itself
obj
end
def self.to_s(obj, seen = {})
case obj
when BigDecimal
obj.to_s("F")
when Hash
# If the custom hash implementation overrides `#to_s`, use their
# custom implementation. Otherwise we use Liquid's default
# implementation.
if obj.class.instance_method(:to_s) == HASH_TO_S_METHOD
hash_inspect(obj, seen)
else
obj.to_s
end
when Array
array_inspect(obj, seen)
else
obj.to_s
end
end
def self.inspect(obj, seen = {})
case obj
when Hash
# If the custom hash implementation overrides `#inspect`, use their
# custom implementation. Otherwise we use Liquid's default
# implementation.
if obj.class.instance_method(:inspect) == HASH_INSPECT_METHOD
hash_inspect(obj, seen)
else
obj.inspect
end
when Array
array_inspect(obj, seen)
else
obj.inspect
end
end
def self.array_inspect(arr, seen = {})
if seen[arr.object_id]
return "[...]"
end
seen[arr.object_id] = true
str = +"["
cursor = 0
len = arr.length
while cursor < len
if cursor > 0
str << ", "
end
item_str = inspect(arr[cursor], seen)
str << item_str
cursor += 1
end
str << "]"
str
ensure
seen.delete(arr.object_id)
end
def self.hash_inspect(hash, seen = {})
if seen[hash.object_id]
return "{...}"
end
seen[hash.object_id] = true
str = +"{"
first = true
hash.each do |key, value|
if first
first = false
else
str << ", "
end
key_str = inspect(key, seen)
str << key_str
str << "=>"
value_str = inspect(value, seen)
str << value_str
end
str << "}"
str
ensure
seen.delete(hash.object_id)
end
HASH_TO_S_METHOD = Hash.instance_method(:to_s)
private_constant :HASH_TO_S_METHOD
HASH_INSPECT_METHOD = Hash.instance_method(:inspect)
private_constant :HASH_INSPECT_METHOD
end
end
|
