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# File 'lib/usher/util/parser.rb', line 87
def parse(path, requirements = nil, default_values = nil)
parts = Usher::Route::Util::Group.new(:all, nil)
scanner = StringScanner.new(path)
current_group = parts
part = nil
while !scanner.eos?
part ?
(part << scanner.scan(@split_regex)) :
(part = scanner.scan(@split_regex))
if scanner.match?(/\\/) and !scanner.match?(@delimiters_regex)
scanner.skip(/\\/)
part << scanner.getch
next
end
case part[0]
when ?*
var_name = part[1, part.size - 1].to_sym
current_group << Usher::Route::Variable::Glob.new(part[1, part.size - 1], nil, requirements && requirements[var_name])
when ?:
var_name = part[1, part.size - 1].to_sym
current_group << Usher::Route::Variable::Single.new(part[1, part.size - 1], nil, requirements && requirements[var_name])
when ?{
pattern = ''
count = 1
simple = scanner.scan(/~/)
variable = scanner.scan(/[!:\*]([^,]+),/)
until count.zero?
regex_part = scanner.scan(/\{|\}|[^\{\}]+/)
case regex_part[0]
when ?{
count += 1
when ?}
count -= 1
end
pattern << regex_part
end
pattern.slice!(pattern.length - 1)
if variable
variable_class = case variable.slice!(0)
when ?! then Usher::Route::Variable::Greedy
when ?* then Usher::Route::Variable::Glob
when ?: then Usher::Route::Variable::Single
end
variable_name = variable[0, variable.size - 1].to_sym
current_group << variable_class.new(variable_name, Regexp.new(pattern), requirements && requirements[variable_name])
elsif simple
static = Usher::Route::Static::Greedy.new(pattern)
static.generate_with = pattern
current_group << static
else
simple_parts = pattern.split(',', 2)
static = Usher::Route::Static::Greedy.new(Regexp.new(simple_parts.last))
static.generate_with = simple_parts.first
current_group << static
end
when ?(
new_group = Usher::Route::Util::Group.new(:any, current_group)
current_group << new_group
current_group = new_group
when ?)
current_group = current_group.parent.group_type == :one ? current_group.parent.parent : current_group.parent
when ?|
unless current_group.parent.group_type == :one
detached_group = current_group.parent.pop
new_group = Usher::Route::Util::Group.new(:one, detached_group.parent)
detached_group.parent = new_group
detached_group.group_type = :all
new_group << detached_group
new_group.parent << new_group
end
current_group.parent << Usher::Route::Util::Group.new(:all, current_group.parent)
current_group = current_group.parent.last
when ?\\
current_group << part[1..-1]
else
current_group << part
end
part = nil
end unless !path || path.empty?
parts
end
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