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module Journey
###
# The Routing table. Contains all routes for a system. Routes can be
# added to the table by calling Routes#add_route
class Routes
include Enumerable
attr_reader :routes, :named_routes
def initialize
@routes = []
@named_routes = {}
@ast = nil
@partitioned_routes = nil
@simulator = nil
end
def length
@routes.length
end
alias :size :length
def last
@routes.last
end
def each(&block)
routes.each(&block)
end
def clear
routes.clear
end
def partitioned_routes
@partitioned_routes ||= routes.partition { |r|
r.path.anchored && r.ast.grep(Nodes::Symbol).all? { |n| n.default_regexp? }
}
end
def ast
return @ast if @ast
return if partitioned_routes.first.empty?
asts = partitioned_routes.first.map { |r| r.ast }
@ast = Nodes::Or.new(asts)
end
def simulator
return @simulator if @simulator
gtg = GTG::Builder.new(ast).transition_table
@simulator = GTG::Simulator.new gtg
end
###
# Add a route to the routing table.
def add_route app, path, conditions, defaults, name = nil
route = Route.new(name, app, path, conditions, defaults)
route.precedence = routes.length
routes << route
named_routes[name] = route if name
clear_cache!
route
end
private
def clear_cache!
@ast = nil
@partitioned_routes = nil
@simulator = nil
end
end
end
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