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favila/storefront-tempid.clj

Created April 24, 2014 20:20
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Hack to fit tempids into JS int range for storefront.
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storefront-tempid.clj
(def ^:const SIGN-BIT (bit-shift-left 1 63))
(defn tempid-cljs->clj [tid]
(if (neg? tid)
(let [cljtid (-> tid (-) (bit-or SIGN-BIT))]
(d/tempid (d/part cljtid) (d/tx->t cljtid)))
tid))
(defn tempid-clj->cljs [tid]
(if (neg? tid)
(-> tid (bit-xor SIGN-BIT) (-))
tid))
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