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With pure much more firmly embedded as mandatory middleware, remove a couple of checks

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mike-thompson-day8 2015-03-05 14:43:11 +11:00
parent 94afb7a7a1
commit a48f55ff79
1 changed files with 16 additions and 18 deletions
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34
src/re_frame/middleware.cljs
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@ -18,17 +18,18 @@
[handler]
(fn pure-handler
[app-db event-vec]
(assert (satisfies? IReactiveAtom app-db)
(str "re-frame: pure not given a Ratom."
(if (map? app-db)
" Looks like \"pure\" is in the middleware pipeline twice."
(str " Got: " app-db))))
(let [orig-db @app-db
new-db (handler orig-db event-vec)]
(if (nil? new-db)
(warn "re-frame: your pure handler returned nil. It should return the new db.")
(if-not (identical? orig-db new-db)
(reset! app-db new-db))))))
(if (not (satisfies? IReactiveAtom app-db))
(do
(if (map? app-db)
(warn "re-frame: Looks like \"pure\" is in the middleware pipeline twice. Ignoring.")
(warn "re-frame: \"pure\" middleware not given a Ratom. Got: " app-db))
handler) ;; turn this into a noop handler
(let [orig-db @app-db
new-db (handler orig-db event-vec)]
(if (nil? new-db)
(warn "re-frame: your pure handler returned nil. It should return the new db state.")
(if-not (identical? orig-db new-db)
(reset! app-db new-db)))))))
(defn debug
@ -38,13 +39,11 @@
[handler]
(fn debug-handler
[db v]
(if (satisfies? IReactiveAtom db)
(str "re-frame: \"debug\" middleware used without prior \"pure\"."))
(group "re-frame event: " v)
(let [new-db (handler db v)
diff (data/diff db new-db)]
(log "only before: " (first diff))
(log " only after: " (second diff))
(log "only after : " (second diff))
(groupEnd)
new-db)))
@ -79,14 +78,12 @@
If a get-in of the path results in a nil, then \"default-fn\" will be called to supply a value.
XXX very like update-in. Should the name be more indicative of that closeness? "
([p]
(path p hash-map))
(path p #(nil)))
([p default-fn]
(fn middleware
[handler]
(fn path-handler
[db v]
(if (satisfies? IReactiveAtom db)
(str "re-frame: \"path\" used in middleware, without prior \"pure\"."))
(if-not (vector? p)
(warn "re-frame: \"path\" expected a vector, got: " p))
(let [val (get-in db p)
@ -126,7 +123,8 @@
position presumably for side effects.
\"f\" is given the value of \"db\". It's return value is ignored.
Examples: \"f\" can run schema validation. Or write current state to localstorage. etc.
In effect, \"f\" is meant to sideeffect. It gets no chance to change db. See \"derive\" (if you need that.)"
In effect, \"f\" is meant to sideeffect. It gets no chance to change db. See \"enrich\"
(if you need that.)"
[f]
(fn middleware
[handler]