penpot/backend/src/app/storage/fs.clj
2022-09-20 23:23:22 +02:00

106 lines
3.3 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) KALEIDOS INC
(ns app.storage.fs
(:require
[app.common.exceptions :as ex]
[app.common.spec :as us]
[app.common.uri :as u]
[app.storage.impl :as impl]
[clojure.spec.alpha :as s]
[cuerdas.core :as str]
[datoteka.fs :as fs]
[datoteka.io :as io]
[integrant.core :as ig]
[promesa.core :as p]
[promesa.exec :as px])
(:import
java.io.InputStream
java.io.OutputStream
java.nio.file.Path
java.nio.file.Files))
;; --- BACKEND INIT
(s/def ::directory ::us/string)
(defmethod ig/pre-init-spec ::backend [_]
(s/keys :opt-un [::directory]))
(defmethod ig/init-key ::backend
[_ cfg]
;; Return a valid backend data structure only if all optional
;; parameters are provided.
(when (string? (:directory cfg))
(let [dir (fs/normalize (:directory cfg))]
(assoc cfg
:type :fs
:directory (str dir)
:uri (u/uri (str "file://" dir))))))
(s/def ::type ::us/keyword)
(s/def ::uri u/uri?)
(s/def ::backend
(s/keys :req-un [::type ::directory ::uri]))
;; --- API IMPL
(defmethod impl/put-object :fs
[{:keys [executor] :as backend} {:keys [id] :as object} content]
(px/with-dispatch executor
(let [base (fs/path (:directory backend))
path (fs/path (impl/id->path id))
full (fs/normalize (fs/join base path))]
(when-not (fs/exists? (fs/parent full))
(fs/create-dir (fs/parent full)))
(with-open [^InputStream src (io/input-stream content)
^OutputStream dst (io/output-stream full)]
(io/copy! src dst)))))
(defmethod impl/get-object-data :fs
[{:keys [executor] :as backend} {:keys [id] :as object}]
(px/with-dispatch executor
(let [^Path base (fs/path (:directory backend))
^Path path (fs/path (impl/id->path id))
^Path full (fs/normalize (fs/join base path))]
(when-not (fs/exists? full)
(ex/raise :type :internal
:code :filesystem-object-does-not-exists
:path (str full)))
(io/input-stream full))))
(defmethod impl/get-object-bytes :fs
[backend object]
(p/let [input (impl/get-object-data backend object)]
(ex/with-always (io/close! input)
(io/read-as-bytes input))))
(defmethod impl/get-object-url :fs
[{:keys [uri executor] :as backend} {:keys [id] :as object} _]
(px/with-dispatch executor
(update uri :path
(fn [existing]
(if (str/ends-with? existing "/")
(str existing (impl/id->path id))
(str existing "/" (impl/id->path id)))))))
(defmethod impl/del-object :fs
[{:keys [executor] :as backend} {:keys [id] :as object}]
(px/with-dispatch executor
(let [base (fs/path (:directory backend))
path (fs/path (impl/id->path id))
path (fs/join base path)]
(Files/deleteIfExists ^Path path))))
(defmethod impl/del-objects-in-bulk :fs
[{:keys [executor] :as backend} ids]
(px/with-dispatch executor
(let [base (fs/path (:directory backend))]
(doseq [id ids]
(let [path (fs/path (impl/id->path id))
path (fs/join base path)]
(Files/deleteIfExists ^Path path))))))