- (void)addRoute:(NSString *)routePattern priority:(NSUInteger)priority handler:(BOOL (^)(NSDictionary<NSString *, id> *parameters))handlerBlock
{
NSArray <NSString *> *optionalRoutePatterns = [JLRParsingUtilities expandOptionalRoutePatternsForPattern:routePattern];
JLRRouteDefinition *route = [[JLRGlobal_routeDefinitionClass alloc] initWithPattern:routePattern priority:priority handlerBlock:handlerBlock];
if (optionalRoutePatterns.count > 0) {
// there are optional params, parse and add them
for (NSString *pattern in optionalRoutePatterns) {
JLRRouteDefinition *optionalRoute = [[JLRGlobal_routeDefinitionClass alloc] initWithPattern:pattern priority:priority handlerBlock:handlerBlock];
[self _registerRoute:optionalRoute];
[self _verboseLog:@"Automatically created optional route: %@", optionalRoute];
}
return;
}
[self _registerRoute:route];
}
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按优先级插入JLRoutes的数组中，优先级高的排列在前面
- (void)_registerRoute:(JLRRouteDefinition *)route
{
if (route.priority == 0 || self.mutableRoutes.count == 0) {
[self.mutableRoutes addObject:route];
} else {
NSUInteger index = 0;
BOOL addedRoute = NO;
// search through existing routes looking for a lower priority route than this one
for (JLRRouteDefinition *existingRoute in [self.mutableRoutes copy]) {
if (existingRoute.priority < route.priority) {
// if found, add the route after it
[self.mutableRoutes insertObject:route atIndex:index];
addedRoute = YES;
break;
}
index++;
}
// if we weren't able to find a lower priority route, this is the new lowest priority route (or same priority as self.routes.lastObject) and should just be added
if (!addedRoute) {
[self.mutableRoutes addObject:route];
}
}
[route didBecomeRegisteredForScheme:self.scheme];
}
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- (BOOL)_routeURL:(NSURL *)URL withParameters:(NSDictionary *)parameters executeRouteBlock:(BOOL)executeRouteBlock
{
if (!URL) {
return NO;
}
[self _verboseLog:@"Trying to route URL %@", URL];
BOOL didRoute = NO;
JLRRouteRequestOptions options = [self _routeRequestOptions];
JLRRouteRequest *request = [[JLRRouteRequest alloc] initWithURL:URL options:options additionalParameters:parameters];
for (JLRRouteDefinition *route in [self.mutableRoutes copy]) {
// check each route for a matching response
JLRRouteResponse *response = [route routeResponseForRequest:request];
if (!response.isMatch) {
continue;
}
[self _verboseLog:@"Successfully matched %@", route];
if (!executeRouteBlock) {
// if we shouldn't execute but it was a match, we're done now
return YES;
}
[self _verboseLog:@"Match parameters are %@", response.parameters];
// Call the handler block
didRoute = [route callHandlerBlockWithParameters:response.parameters];
if (didRoute) {
// if it was routed successfully, we're done - otherwise, continue trying to route
break;
}
}
if (!didRoute) {
[self _verboseLog:@"Could not find a matching route"];
}
// if we couldn't find a match and this routes controller specifies to fallback and its also not the global routes controller, then...
if (!didRoute && self.shouldFallbackToGlobalRoutes && ![self _isGlobalRoutesController]) {
[self _verboseLog:@"Falling back to global routes..."];
didRoute = [[JLRoutes globalRoutes] _routeURL:URL withParameters:parameters executeRouteBlock:executeRouteBlock];
}
// if, after everything, we did not route anything and we have an unmatched URL handler, then call it
if (!didRoute && executeRouteBlock && self.unmatchedURLHandler) {
[self _verboseLog:@"Falling back to the unmatched URL handler"];
self.unmatchedURLHandler(self, URL, parameters);
}
return didRoute;
}
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