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Allow customizing route resolution

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- Support custom predicate for checking if path is a valid endpoint
- Use default predicate to implement the current behaviour, where leaves of the route tree are endpoints
This commit is contained in:
Toni Vanhala 2019-10-25 18:14:50 +03:00
parent a68ac257e7
commit 841f581a17
2 changed files with 23 additions and 7 deletions
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9
modules/reitit-core/src/reitit/core.cljc
View file

@ -334,13 +334,15 @@
;; Creating Routers
;;
(defn ^:no-doc default-router-options []
{:lookup (fn lookup [[_ {:keys [name]}] _] (if name #{name}))
:expand expand
:coerce (fn coerce [route _] route)
:compile (fn compile [[_ {:keys [handler]}] _] handler)
:exception exception/exception
:conflicts (fn throw! [conflicts] (exception/fail! :path-conflicts conflicts))})
:conflicts (fn throw! [conflicts] (exception/fail! :path-conflicts conflicts))
:endpoint impl/leaf-endpoint})
(defn router
"Create a [[Router]] from raw route data and optionally an options map.
@ -360,7 +362,10 @@
| `:validate` | Function of `routes opts => ()` to validate route (data) via side-effects
| `:conflicts` | Function of `{route #{route}} => ()` to handle conflicting routes
| `:exception` | Function of `Exception => Exception ` to handle creation time exceptions (default `reitit.exception/exception`)
| `:router` | Function of `routes opts => router` to override the actual router implementation"
| `:router` | Function of `routes opts => router` to override the actual router implementation
| `:endpoint` | Function of `prev-path path expanded-data data children => {:endpoint :inherit}`.
| | Used to transform data for this endpoint and data inherited to child routes.
| | Return falsy or `{:endpoint nil}` to skip path as endpoint and pass data to children."
([raw-routes]
(router raw-routes {}))
([raw-routes opts]

21
modules/reitit-core/src/reitit/impl.cljc
View file

@ -37,7 +37,7 @@
coll
coll))
(defn walk [raw-routes {:keys [path data routes expand]
(defn walk [raw-routes {:keys [path data routes expand endpoint]
:or {data [], routes []}
:as opts}]
(letfn
@ -53,10 +53,15 @@
(sequential? (first maybe-arg)))
(nil? maybe-arg))
[{} args]
[maybe-arg (rest args)])
macc (into macc (expand data opts))
child-routes (walk-many (str pacc path) macc (keep identity childs))]
(if (seq childs) (seq child-routes) [[(str pacc path) macc]])))))]
[maybe-arg (rest args)])]
(let [d (endpoint pacc path macc data childs)
data-for-endpoint (when (:endpoint d) (into macc (expand (:endpoint d) opts)))
data-for-children (or (:inherit d) data)
macc (into macc (expand data-for-children opts))]
(-> (when data-for-endpoint [[(str pacc path) data-for-endpoint]])
(concat (when (seq childs) (-> (str pacc path)
(walk-many macc (keep identity childs))
(seq))))))))))]
(walk-one path (mapv identity data) raw-routes)))
(defn map-data [f routes]
@ -254,6 +259,12 @@
(query-parameter k v))))
(str/join "&")))
(defn leaf-endpoint
[_ _ _ data childs]
(when-not (seq childs)
{:endpoint data
:inherit {}}))
(defmacro goog-extend [type base-type ctor & methods]
`(do
(def ~type (fn ~@ctor))