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;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
(declaim (optimize (speed 0) (safety 3) (debug 3)))
(in-package #:music-dispensary)
;; ========================================================================== ;;
(defclass file-browser ()
((document-root :initarg :document-root
:initform nil
:accessor document-root
:documentation "The highest level directory that the
user is allowed to navigate to. Ends in a slash.")
(relative-path :initarg :relative-path
:initform nil
:accessor relative-path
:documentation "Add this to `document-root'
to get to the current directory, whose contents are to be
displayed.")
(mime-extensions :initarg :mime-extensions
:initform nil
:accessor mime-extensions
:documentation "A list of MIME file extensions
that, if not `nil', will limit directory listings to show only those
files that contain these extensions.")
(nodes :initarg :nodes
:initform ()
:accessor nodes
:documentation "The nodes of the current directory. A list
of dotted pairs in the form '(([:directory|:file|:symlink] . <node-name>))."))
(:documentation "Used for directory-browsing. Keeps track of
directory-navigating state in the `user-session'."))
(defmethod absolute-path ((file-browser file-browser))
(ppcre:regex-replace-all "//"
(format nil "~a/~a" (or (document-root file-browser) "") (or (relative-path file-browser) ""))
"/"))
(defmethod update-relative-path ((file-browser file-browser) node)
(when (not (null-or-empty-p node))
(if (equal node "..")
(if (null-or-empty-p (relative-path file-browser))
(setf (relative-path file-browser) "")
(setf (relative-path file-browser) (let ((path-list (nreverse (remove-if 'null-or-empty-p (ppcre:split "/" (relative-path file-browser)))))
(new-path ""))
(pop path-list)
(loop for path-part in (nreverse path-list) do
(setf new-path (format nil "~a~a/" new-path path-part)))
(ppcre:regex-replace-all "/$" new-path ""))))
(if (null-or-empty-p (relative-path file-browser))
(setf (relative-path file-browser) node)
(setf (relative-path file-browser) (format nil "~a/~a" (relative-path file-browser) node))))))
(defmethod directory-list ((file-browser file-browser))
(labels ((finder (type)
(remove-if 'null (mapcar (lambda (line)
(when (not (or (equal line ".")))
(let ((item (ppcre:regex-replace-all "\\./" line "")))
(when (or (null (mime-extensions file-browser))
(equal type "d")
(remove-if-not (lambda (x)
(match-it (format nil "~a$" x) item))
(mime-extensions file-browser)))
(cons (cond ((equal type "d") :directory)
((equal type "f") :file)
((equal type "l") :symlink))
item)))))
(shell-wrapper (format nil
"pushd '~a' >/dev/null ; find -maxdepth 1 -type ~a | sort ; popd >/dev/null"
(absolute-path file-browser)
type))))))
(setf (nodes file-browser) (remove-if 'null (append `((:directory . "..")) (finder "d") (finder "f") (finder "l"))))))
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