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97 lines
2.1 KiB
Clojure
97 lines
2.1 KiB
Clojure
;; This Source Code Form is subject to the terms of the Mozilla Public
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;; License, v. 2.0. If a copy of the MPL was not distributed with this
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;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
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;;
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;; This Source Code Form is "Incompatible With Secondary Licenses", as
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;; defined by the Mozilla Public License, v. 2.0.
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;;
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;; Copyright (c) 2020 UXBOX Labs SL
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(ns uxbox.util.transit
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"A lightweight abstraction for transit serialization."
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(:require
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[cognitect.transit :as t]
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[linked.core :as lk]
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[linked.set :as lks]
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[uxbox.common.geom.point :as gpt]
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[uxbox.common.geom.matrix :as gmt]
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[uxbox.util.time :as dt]))
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(deftype Blob [content]
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IDeref
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(-deref [_] content))
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(defn blob?
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[v]
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(instance? Blob v))
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(def blob-write-handler
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(t/write-handler
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(constantly "jsonblob")
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(fn [v] (js/JSON.stringify @v))))
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(def blob-read-handler
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(t/read-handler
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(fn [value]
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(->Blob (js/JSON.parse value)))))
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;; --- Transit adapters
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(def point-write-handler
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(t/write-handler
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(constantly "point")
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(fn [v] (into {} v))))
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(def point-read-handler
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(t/read-handler
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(fn [value]
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(gpt/map->Point value))))
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(def matrix-write-handler
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(t/write-handler
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(constantly "matrix")
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(fn [v] (into {} v))))
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(def matrix-read-handler
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(t/read-handler
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(fn [value]
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(gmt/map->Matrix value))))
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(def ordered-set-write-handler
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(t/write-handler
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(constantly "ordered-set")
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(fn [v] (vec v))))
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(def ordered-set-read-handler
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(t/read-handler #(into (lk/set) %)))
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;; --- Transit Handlers
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(def ^:privare +read-handlers+
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{"u" uuid
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"ordered-set" ordered-set-read-handler
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"jsonblob" blob-read-handler
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"matrix" matrix-read-handler
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"point" point-read-handler})
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(def ^:privare +write-handlers+
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{gmt/Matrix matrix-write-handler
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Blob blob-write-handler
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lks/LinkedSet ordered-set-write-handler
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gpt/Point point-write-handler})
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;; --- Public Api
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(defn decode
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[data]
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(let [r (t/reader :json {:handlers +read-handlers+})]
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(t/read r data)))
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(defn encode
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[data]
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(try
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(let [w (t/writer :json {:handlers +write-handlers+})]
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(t/write w data))
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(catch :default e
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(throw e))))
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