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| import warning from 'warning'
import { loopAsync } from './AsyncUtils'
import { matchPattern } from './PatternUtils'
import { createRoutes } from './RouteUtils'
function getChildRoutes(route, location, callback) {
if (route.childRoutes) {
callback(null, route.childRoutes)
} else if (route.getChildRoutes) {
route.getChildRoutes(location, function (error, childRoutes) {
callback(error, !error && createRoutes(childRoutes))
})
} else {
callback()
}
}
function getIndexRoute(route, location, callback) {
if (route.indexRoute) {
callback(null, route.indexRoute)
} else if (route.getIndexRoute) {
route.getIndexRoute(location, function (error, indexRoute) {
callback(error, !error && createRoutes(indexRoute)[0])
})
} else if (route.childRoutes) {
const pathless = route.childRoutes.filter(function (obj) {
return !obj.hasOwnProperty('path')
})
loopAsync(pathless.length, function (index, next, done) {
getIndexRoute(pathless[index], location, function (error, indexRoute) {
Eif (error || indexRoute) {
const routes = [ pathless[index] ].concat( Array.isArray(indexRoute) ? indexRoute : [ indexRoute ] )
done(error, routes)
} else {
next()
}
})
}, function (err, routes) {
callback(null, routes)
})
} else {
callback()
}
}
function assignParams(params, paramNames, paramValues) {
return paramNames.reduce(function (params, paramName, index) {
const paramValue = paramValues && paramValues[index]
Iif (Array.isArray(params[paramName])) {
params[paramName].push(paramValue)
} else if (paramName in params) {
params[paramName] = [ params[paramName], paramValue ]
} else {
params[paramName] = paramValue
}
return params
}, params)
}
function createParams(paramNames, paramValues) {
return assignParams({}, paramNames, paramValues)
}
function matchRouteDeep(
route, location, remainingPathname, paramNames, paramValues, callback
) {
let pattern = route.path || ''
if (pattern.charAt(0) === '/') {
remainingPathname = location.pathname
paramNames = []
paramValues = []
}
if (remainingPathname !== null) {
const matched = matchPattern(pattern, remainingPathname)
remainingPathname = matched.remainingPathname
paramNames = [ ...paramNames, ...matched.paramNames ]
paramValues = [ ...paramValues, ...matched.paramValues ]
if (remainingPathname === '' && route.path) {
const match = {
routes: [ route ],
params: createParams(paramNames, paramValues)
}
getIndexRoute(route, location, function (error, indexRoute) {
Iif (error) {
callback(error)
} else {
if (Array.isArray(indexRoute)) {
warning(
indexRoute.every(route => !route.path),
'Index routes should not have paths'
)
match.routes.push(...indexRoute)
} else if (indexRoute) {
warning(
!indexRoute.path,
'Index routes should not have paths'
)
match.routes.push(indexRoute)
}
callback(null, match)
}
})
return
}
}
if (remainingPathname != null || route.childRoutes) {
// Either a) this route matched at least some of the path or b)
// we don't have to load this route's children asynchronously. In
// either case continue checking for matches in the subtree.
getChildRoutes(route, location, function (error, childRoutes) {
Iif (error) {
callback(error)
} else if (childRoutes) {
// Check the child routes to see if any of them match.
matchRoutes(childRoutes, location, function (error, match) {
Iif (error) {
callback(error)
} else if (match) {
// A child route matched! Augment the match and pass it up the stack.
match.routes.unshift(route)
callback(null, match)
} else {
callback()
}
}, remainingPathname, paramNames, paramValues)
} else {
callback()
}
})
} else {
callback()
}
}
/**
* Asynchronously matches the given location to a set of routes and calls
* callback(error, state) when finished. The state object will have the
* following properties:
*
* - routes An array of routes that matched, in hierarchical order
* - params An object of URL parameters
*
* Note: This operation may finish synchronously if no routes have an
* asynchronous getChildRoutes method.
*/
function matchRoutes(
routes, location, callback,
remainingPathname=location.pathname, paramNames=[], paramValues=[]
) {
loopAsync(routes.length, function (index, next, done) {
matchRouteDeep(
routes[index], location, remainingPathname, paramNames, paramValues,
function (error, match) {
if (error || match) {
done(error, match)
} else {
next()
}
}
)
}, callback)
}
export default matchRoutes
|