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impress/app/models/item/search/query.rb

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# encoding=utf-8
# ^ to put the regex in utf-8 mode
class Item
module Search
class Query
def initialize(filters, user, text=nil)
@filters = filters
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@user = user
@text = text
end
def results
@filters.map(&:to_query).inject(Item.all, &:merge).
alphabetize_by_translations(Query.locale)
end
def to_s
@text || @filters.map(&:to_s).join(' ')
end
def self.locale
(I18n.fallbacks[I18n.locale] &
I18n.locales_with_neopets_language_code).first
end
TEXT_FILTER_EXPR = /([+-]?)(?:(\p{Word}+):)?(?:"([^"]+)"|(\S+))/
def self.from_text(text, user=nil)
filters = []
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text.scan(TEXT_FILTER_EXPR) do |sign, key, quoted_value, unquoted_value|
key = 'name' if key.blank?
value = quoted_value || unquoted_value
is_positive = (sign != '-')
case key
when 'name'
filters << (is_positive ?
Filter.name_includes(value, locale) :
Filter.name_excludes(value, locale))
when 'occupies'
filters << (is_positive ?
Filter.occupies(value, locale) :
Filter.not_occupies(value, locale))
when 'restricts'
filters << (is_positive ?
Filter.restricts(value, locale) :
Filter.not_restricts(value, locale))
when 'is'
case value
when 'nc'
filters << (is_positive ? Filter.is_nc : Filter.is_not_nc)
when 'np'
filters << (is_positive ? Filter.is_np : Filter.is_not_np)
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when 'pb'
filters << (is_positive ? Filter.is_pb : Filter.is_not_pb)
else
message = I18n.translate('items.search.errors.not_found.label',
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:label => "is:#{value}")
raise Item::Search::Error, message
end
else
message = I18n.translate('items.search.errors.not_found.label',
:label => key)
raise Item::Search::Error, message
end
end
self.new(filters, user, text)
end
def self.from_params(params, user=nil)
raise NotImplementedError, "TODO: Reimplemented Advanced Search"
end
end
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class Error < Exception
end
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private
# A Filter is basically a wrapper for an Item scope, with extra info about
# how to convert it into a search query string.
class Filter
def initialize(query, text)
@query = query
@text = text
end
def to_query
@query
end
def to_s
@text
end
def inspect
"#<#{self.class.name} #{@text.inspect}>"
end
def self.name_includes(value, locale)
text = /\s/.match(value) ? '"' + value + '"' : value
self.new Item.name_includes(value, locale), text
end
def self.name_excludes(value, locale)
text = '-' + (/\s/.match(value) ? '"' + value + '"' : value)
self.new Item.name_excludes(value, locale), text
end
def self.occupies(value, locale)
self.new Item.occupies(value, locale), "occupies:#{value}"
end
def self.not_occupies(value, locale)
self.new Item.not_occupies(value, locale), "-occupies:#{value}"
end
def self.restricts(value, locale)
self.new Item.restricts(value, locale), "restricts:#{value}"
end
def self.not_restricts(value, locale)
self.new Item.not_restricts(value, locale), "-restricts:#{value}"
end
def self.is_nc
self.new Item.is_nc, 'is:nc'
end
def self.is_not_nc
self.new Item.is_np, '-is:nc'
end
def self.is_np
self.new Item.is_np, 'is:np'
end
def self.is_not_np
self.new Item.is_nc, '-is:np'
end
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def self.is_pb
self.new Item.is_pb, 'is:pb'
end
def self.is_not_pb
self.new Item.is_not_pb, '-is:pb'
end
end
end
end