2020-12-02 15:35:14 +01:00

55 lines
1.4 KiB
Clojure

;; This Source Code Form is subject to the terms of the Mozilla Public
;; License, v. 2.0. If a copy of the MPL was not distributed with this
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
;;
;; Copyright (c) 2016 Andrey Antukh <niwi@niwi.nz>
(ns app.util.data
"Data transformations utils."
(:require [clojure.walk :as walk]
[cuerdas.core :as str]))
;; TODO: move to app.common.helpers
(defn dissoc-in
[m [k & ks]]
(if ks
(if-let [nextmap (get m k)]
(let [newmap (dissoc-in nextmap ks)]
(if (seq newmap)
(assoc m k newmap)
(dissoc m k)))
m)
(dissoc m k)))
(defn normalize-attrs
"Recursively transforms all map keys from strings to keywords."
[m]
(letfn [(tf [[k v]]
(let [ks (-> (name k)
(str/replace "_" "-"))]
[(keyword ks) v]))
(walker [x]
(if (map? x)
(into {} (map tf) x)
x))]
(walk/postwalk walker m)))
(defn strip-delete-attrs
[m]
(dissoc m :deleted-at))
(defn normalize
"Perform a common normalization transformation
for a entity (database retrieved) data structure."
[m]
(-> m normalize-attrs strip-delete-attrs))
(defn deep-merge
[& maps]
(letfn [(merge' [& maps]
(if (every? map? maps)
(apply merge-with merge' maps)
(last maps)))]
(apply merge' (remove nil? maps))))