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hashid.clj
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hashid.clj
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;; Copyright (c) 2015-2024 Michael Schaeffer
;;
;; Licensed as below.
;;
;; Licensed under the Apache License, Version 2.0 (the "License");
;; you may not use this file except in compliance with the License.
;; You may obtain a copy of the License at
;;
;; http://www.apache.org/licenses/LICENSE-2.0
;;
;; The license is also includes at the root of the project in the file
;; LICENSE.
;;
;; Unless required by applicable law or agreed to in writing, software
;; distributed under the License is distributed on an "AS IS" BASIS,
;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;; See the License for the specific language governing permissions and
;; limitations under the License.
;;
;; You must not remove this notice, or any other, from this software.
(ns playbook.hashid
(:require [hashids.core :as hashids]))
(def default-opts
{:salt ""
:min-length 8})
(defn- typed-opts [ opts type ]
(assoc opts :salt (str (name type) (:salt opts))))
(defn encode
([ type id ]
(encode default-opts type id))
([ opts type id ]
(str (name type)
(hashids/encode (typed-opts (merge default-opts opts) type) id))))
(defn decode
([ type hid ]
(decode default-opts type hid ))
([ opts type hid ]
(let [typename (name type)]
(and (.startsWith hid typename)
(let [decoded (hashids/decode (typed-opts (merge default-opts opts) type)
(.substring hid (count typename)))]
(and (= 1 (count decoded))
(first decoded)))))))