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utils.clj
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utils.clj
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(ns pathological.utils
(:refer-clojure :exclude [type])
(:require
[clojure.string :as string]
[clojure.set :refer [map-invert]]
[pathological.principals :as pr]
[pathological.attribute-specs :as as])
(:import
[clojure.lang Named]
[java.util Set]
[java.time Instant]
[java.nio ByteBuffer]
[java.nio.charset StandardCharsets Charset]
[java.nio.file CopyOption
FileVisitOption
FileVisitResult
LinkOption
OpenOption
StandardOpenOption
StandardCopyOption]
[java.nio.file.attribute AclEntry
AclEntryFlag
AclEntryPermission
AclEntryType
AclFileAttributeView
BasicFileAttributeView
DosFileAttributeView
FileOwnerAttributeView
FileTime
PosixFileAttributeView
PosixFilePermission
PosixFilePermissions
UserDefinedFileAttributeView]
[java.util.stream Stream]))
(defn camel->kebab [value]
(string/lower-case
(string/replace (name value)
#"([a-z0-9])([A-Z])"
"$1-$2")))
(defn kebab->camel [value]
(string/replace (name value)
#"([a-z0-9])-([a-z0-9])"
(fn [[_ first second]]
(str first (string/upper-case second)))))
(def line-separator (System/lineSeparator))
(def ^:dynamic *charsets*
{:us-ascii StandardCharsets/US_ASCII
:iso-8859-1 StandardCharsets/ISO_8859_1
:utf-8 StandardCharsets/UTF_8
:utf-16be StandardCharsets/UTF_16BE
:utf-16le StandardCharsets/UTF_16LE
:utf-16 StandardCharsets/UTF_16})
(def ^:dynamic *open-options*
{:read StandardOpenOption/READ
:write StandardOpenOption/WRITE
:append StandardOpenOption/APPEND
:truncate-existing StandardOpenOption/TRUNCATE_EXISTING
:create StandardOpenOption/CREATE
:create-new StandardOpenOption/CREATE_NEW
:delete-on-close StandardOpenOption/DELETE_ON_CLOSE
:sparse StandardOpenOption/SPARSE
:sync StandardOpenOption/SYNC
:dsync StandardOpenOption/DSYNC
:no-follow-links LinkOption/NOFOLLOW_LINKS})
(def ^:dynamic *copy-options*
{:replace-existing StandardCopyOption/REPLACE_EXISTING
:copy-attributes StandardCopyOption/COPY_ATTRIBUTES
:atomic-move StandardCopyOption/ATOMIC_MOVE
:no-follow-links LinkOption/NOFOLLOW_LINKS})
(def ^:dynamic *link-options*
{:no-follow-links LinkOption/NOFOLLOW_LINKS})
(def ^:dynamic *file-visit-options*
{:follow-links FileVisitOption/FOLLOW_LINKS})
(def ^:dynamic *file-visit-results*
{:continue FileVisitResult/CONTINUE
:terminate FileVisitResult/TERMINATE
:skip-subtree FileVisitResult/SKIP_SUBTREE
:skip-siblings FileVisitResult/SKIP_SIBLINGS})
(def ^:dynamic *file-attribute-view-classes*
{:basic BasicFileAttributeView
:owner FileOwnerAttributeView
:acl AclFileAttributeView
:dos DosFileAttributeView
:posix PosixFileAttributeView
:user UserDefinedFileAttributeView})
(def ^:dynamic *file-store-attribute-view-classes*
{})
(def acl-entry-types
{:allow AclEntryType/ALLOW
:deny AclEntryType/DENY
:audit AclEntryType/AUDIT
:alarm AclEntryType/ALARM})
(def acl-entry-permissions
{:read-data AclEntryPermission/READ_DATA
:write-data AclEntryPermission/WRITE_DATA
:append-data AclEntryPermission/APPEND_DATA
:read-named-attributes AclEntryPermission/READ_NAMED_ATTRS
:write-named-attributes AclEntryPermission/WRITE_NAMED_ATTRS
:execute AclEntryPermission/EXECUTE
:delete-child AclEntryPermission/DELETE_CHILD
:read-attributes AclEntryPermission/READ_ATTRIBUTES
:write-attributes AclEntryPermission/WRITE_ATTRIBUTES
:delete AclEntryPermission/DELETE
:read-acl AclEntryPermission/READ_ACL
:write-acl AclEntryPermission/WRITE_ACL
:write-owner AclEntryPermission/WRITE_OWNER
:synchronize AclEntryPermission/SYNCHRONIZE
:list-directory AclEntryPermission/LIST_DIRECTORY
:add-file AclEntryPermission/ADD_FILE
:add-subdirectory AclEntryPermission/ADD_SUBDIRECTORY})
(def acl-entry-flags
{:file-inherit AclEntryFlag/FILE_INHERIT
:directory-inherit AclEntryFlag/DIRECTORY_INHERIT
:no-propagate-inherit AclEntryFlag/NO_PROPAGATE_INHERIT
:inherit-only AclEntryFlag/INHERIT_ONLY})
(def posix-file-permissions
{:owner-read PosixFilePermission/OWNER_READ
:owner-write PosixFilePermission/OWNER_WRITE
:owner-execute PosixFilePermission/OWNER_EXECUTE
:group-read PosixFilePermission/GROUP_READ
:group-write PosixFilePermission/GROUP_WRITE
:group-execute PosixFilePermission/GROUP_EXECUTE
:others-read PosixFilePermission/OTHERS_READ
:others-write PosixFilePermission/OTHERS_WRITE
:others-execute PosixFilePermission/OTHERS_EXECUTE})
(defn ->file-attribute-view-class [type]
(if (instance? Named type)
(get *file-attribute-view-classes* (keyword (name type)) type)
type))
(defn ->file-store-attribute-view-class [type]
(if (instance? Named type)
(get *file-store-attribute-view-classes* (keyword (name type)) type)
type))
(defn ->acl-entry-type [value]
(get acl-entry-types value value))
(defn <-acl-entry-type [value]
(get (map-invert acl-entry-types) value))
(defn ->acl-entry-permission [value]
(get acl-entry-permissions value value))
(defn <-acl-entry-permission [value]
(get (map-invert acl-entry-permissions) value))
(defn ->acl-entry-flag [value]
(get acl-entry-flags value value))
(defn <-acl-entry-flag [value]
(get (map-invert acl-entry-flags) value))
(defn ->acl-entry [value]
(if-not (instance? AclEntry value)
(let [{:keys [type principal permissions flags]
:or {permissions #{}
flags #{}}} value]
(-> (AclEntry/newBuilder)
(.setType (->acl-entry-type type))
(.setPrincipal principal)
(.setPermissions
^Set (set (map ->acl-entry-permission permissions)))
(.setFlags
^Set (set (map ->acl-entry-flag flags)))
(.build)))
value))
(defn <-acl-entry [^AclEntry entry]
(let [type (<-acl-entry-type (.type entry))
principal (pr/<-user-principal (.principal entry))
permissions (set (map <-acl-entry-permission (.permissions entry)))
flags (set (map <-acl-entry-flag (.flags entry)))]
{:type type
:principal principal
:permissions permissions
:flags flags}))
(defn ->posix-file-permission [value]
(if-not (instance? PosixFilePermission value)
(get posix-file-permissions value)
value))
(defn <-posix-file-permission [value]
(get (map-invert posix-file-permissions) value))
(defn <-posix-file-permissions-string [string]
(set (map <-posix-file-permission (PosixFilePermissions/fromString string))))
(defn ->posix-file-permissions-string [permissions]
(PosixFilePermissions/toString
(set (map ->posix-file-permission permissions))))
(defn ->posix-file-permissions [string-or-set]
(let [keyword-set
(if (string? string-or-set)
(<-posix-file-permissions-string string-or-set)
string-or-set)
posix-file-permission-set
(set (map ->posix-file-permission keyword-set))]
posix-file-permission-set))
(defn <-posix-file-permissions [permissions]
(set (map <-posix-file-permission permissions)))
(defn ->posix-file-permissions-attribute [string-or-set]
(PosixFilePermissions/asFileAttribute
(->posix-file-permissions string-or-set)))
(defn ->file-time [value]
(when value
(if-not (instance? FileTime value)
(FileTime/from (Instant/parse value))
value)))
(defn <-file-time [value]
(str value))
(defn ->lookup-fn [var]
(fn [value] (get var value value)))
(defn ->charset [value]
(get *charsets* value value))
(defn charset? [value]
(and value
(or (instance? Charset value)
(contains? *charsets* value))))
(defn ->bytes
([^String value]
(.getBytes value))
([^String value charset]
(.getBytes value ^Charset (->charset charset))))
(defn ->byte-buffer
([value]
(->byte-buffer value :utf-8))
([value charset]
(cond
(instance? ByteBuffer value) value
(bytes? value) (ByteBuffer/wrap value)
:default
(ByteBuffer/wrap
(.getBytes
(str value)
^Charset (->charset charset))))))
(defn <-byte-buffer [^ByteBuffer value]
(.array value))
(def ->open-option (->lookup-fn *open-options*))
(def ->copy-option (->lookup-fn *copy-options*))
(def ->link-option (->lookup-fn *link-options*))
(def ->file-visit-option (->lookup-fn *file-visit-options*))
(defmacro ->varargs-array [type args]
`(into-array ~type (or ~args [])))
(defmacro ->file-attributes-array [args]
`(->varargs-array java.nio.file.attribute.FileAttribute ~args))
(defmacro ->open-options-array [args]
`(->varargs-array OpenOption (map ->open-option ~args)))
(defmacro ->copy-options-array [args]
`(->varargs-array CopyOption (map ->copy-option ~args)))
(defmacro ->link-options-array [args]
`(->varargs-array LinkOption (map ->link-option ~args)))
(defmacro ->file-visit-options-array [args]
`(->varargs-array FileVisitOption (map ->file-visit-option ~args)))
(defn ->file-visit-options-set [options]
(set (map ->file-visit-option options)))
(defn ->file-visit-result [control]
(or (get *file-visit-results* control)
(throw (AssertionError. (str "Invalid control: " control)))))
(def ->attribute-value-conversion-defaults
{:posix {:permissions ->posix-file-permissions}
:user {:* ->byte-buffer}
:* {:creation-time ->file-time
:last-access-time ->file-time
:last-modified-time ->file-time}})
(def <-attribute-value-conversion-defaults
{:acl {:acl #(mapv <-acl-entry %)}
:posix {:permissions <-posix-file-permissions}
:* {:creation-time <-file-time
:last-access-time <-file-time
:last-modified-time <-file-time
:owner pr/<-user-principal
:group pr/<-group-principal}})
(def ^:dynamic *->attribute-value-conversions*
->attribute-value-conversion-defaults)
(def ^:dynamic *<-attribute-value-conversions*
<-attribute-value-conversion-defaults)
(defn- lookup-conversion [all-conversions attribute-spec]
(let [view (as/view attribute-spec)
name (as/name attribute-spec)]
(or
(get-in all-conversions [view name])
(get-in all-conversions [view :*])
(get-in all-conversions [:* name])
(get-in all-conversions [:* :*])
identity)))
(defn ->attribute-value [attribute-spec value]
(let [attribute-conversion
(lookup-conversion *->attribute-value-conversions* attribute-spec)]
(attribute-conversion value)))
(defn <-attribute-value [attribute-spec value]
(let [attribute-conversion
(lookup-conversion *<-attribute-value-conversions* attribute-spec)]
(attribute-conversion value)))
(defrecord FileAttribute [name value]
java.nio.file.attribute.FileAttribute
(name [_] name)
(value [_] value))
(defn ->file-attribute [attribute-spec value]
(map->FileAttribute
{:name (as/->attribute-spec-string attribute-spec)
:value (->attribute-value attribute-spec value)}))
(defn stream-seq [^Stream stream]
(iterator-seq (.iterator stream)))