Class: Usher::Util::Parser
- Inherits:
-
Object
- Object
- Usher::Util::Parser
- Defined in:
- lib/usher/util/parser.rb
Instance Attribute Summary collapse
-
#router ⇒ Object
readonly
Returns the value of attribute router.
Instance Method Summary collapse
- #generate_route(unprocessed_path, conditions, requirements, default_values, generate_with, priority) ⇒ Object
-
#initialize(router, valid_regex) ⇒ Parser
constructor
A new instance of Parser.
- #parse(path, requirements = nil, default_values = nil) ⇒ Object
- #parse_and_expand(path, requirements = nil, default_values = nil) ⇒ Object
Constructor Details
#initialize(router, valid_regex) ⇒ Parser
Returns a new instance of Parser.
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# File 'lib/usher/util/parser.rb', line 9 def initialize(router, valid_regex) @router = router @split_regex = Regexp.new('((:|\*)?' + valid_regex + '|' + router.delimiters_regex + '|\(|\)|\||\{)') @delimiters_regex = Regexp.new(router.delimiters_regex) end |
Instance Attribute Details
#router ⇒ Object (readonly)
Returns the value of attribute router.
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# File 'lib/usher/util/parser.rb', line 7 def router @router end |
Instance Method Details
#generate_route(unprocessed_path, conditions, requirements, default_values, generate_with, priority) ⇒ Object
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# File 'lib/usher/util/parser.rb', line 15 def generate_route(unprocessed_path, conditions, requirements, default_values, generate_with, priority) match_partially = false processed_path = unprocessed_path case unprocessed_path when String if unprocessed_path[-1] == ?* unprocessed_path.slice!(-1) match_partially = true end processed_path = parse(unprocessed_path, requirements, default_values) when Regexp processed_path = [Route::Static::Greedy.new(unprocessed_path)] when nil match_partially = true else match_partially = false end if processed_path && !processed_path.first.is_a?(Route::Util::Group) group = Usher::Route::Util::Group.new(:all, nil) processed_path.each{|p| group << p} processed_path = group end paths = processed_path.nil? ? [nil] : Route::Util.(processed_path) paths.each do |path| path && path.each_with_index do |part, index| part.default_value = default_values[part.name] if part.is_a?(Usher::Route::Variable) && default_values && default_values[part.name] case part when Usher::Route::Variable::Glob possible_look_ahead = path[index + 1, path.size].find{|p| !p.is_a?(Usher::Route::Variable) && !router.delimiters.unescaped.include?(p)} || nil if part.look_ahead && !part.look_ahead_priority && possible_look_ahead != part.look_ahead part.look_ahead = nil part.look_ahead_priority = true else part.look_ahead = path[index + 1, path.size].find{|p| !p.is_a?(Usher::Route::Variable) && !router.delimiters.unescaped.include?(p)} || nil end when Usher::Route::Variable possible_look_ahead = router.delimiters.first_in(path[index + 1, path.size]) || router.delimiters.unescaped.first if part.look_ahead && !part.look_ahead_priority && possible_look_ahead != part.look_ahead part.look_ahead = nil part.look_ahead_priority = true else part.look_ahead = router.delimiters.first_in(path[index + 1, path.size]) || router.delimiters.unescaped.first end end end end router.route_class.new( unprocessed_path, paths, router, conditions, requirements, default_values, generate_with, match_partially, priority ) end |
#parse(path, requirements = nil, default_values = nil) ⇒ Object
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# File 'lib/usher/util/parser.rb', line 82 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 ?*, ?: variable_class = part[0] == ?* ? Usher::Route::Variable::Glob : Usher::Route::Variable::Single var_name = part[1, part.size - 1].to_sym current_group << variable_class.new(part[1, part.size - 1], requirements && requirements[var_name].is_a?(Regexp) ? requirements[var_name] : 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 raise DoubleRegexpException.new("#{variable_name} has two regex validators, #{pattern} and #{requirements[variable_name]}") if requirements && requirements[variable_name] && requirements[variable_name].is_a?(Regexp) 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 |