;;; fwoar-json-navigator.el --- more functional utilities for emacs -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Edward Langley
;; Author: Edward Langley <fwoar@elangley.org>
;; Version: 0.0.1
;; Keywords: json,navigator
;; URL: https://fwoar.co
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; simple attempts to navigate json
;;; Code:
(defvar-local fwoar/json-nav--data nil)
(defvar-local fwoar/json-nav--path nil)
(defun fwoar/json--ensure-data ()
(unless fwoar/json-nav--data
(save-excursion
(goto-char (point-min))
(setq-local fwoar/json-nav--data (json-parse-buffer :null-object nil))))
(values))
(defun fwoar/json-nav--pierce-vectors (fun it)
(cl-typecase it
(vector (map 'vector
(lambda (next)
(fwoar/json-nav--pierce-vectors fun next))
it))
(t (funcall fun it))))
(defun fwoar/json-nav--get-path (data path)
(cl-loop with cur = data for key in path
do
(setf cur
(cl-etypecase cur
(vector
(fwoar/json-nav--pierce-vectors (fwoar/key key)
cur))
(hash-table
(funcall (fwoar/key key)
cur))
(null ())))
finally (return cur)))
(cl-defmacro fwoar/json-nav--with-collector ((c) &body body)
(declare (indent 1))
(let ((v (gensym "v")))
`(let ((,v ()))
(cl-flet ((,c (it) (push it ,v)))
,@body
(nreverse ,v)))))
(defun fwoar/json-nav--get-keys ()
(fwoar/json--ensure-data)
(let ((data (fwoar/json-nav--get-path fwoar/json-nav--data
(reverse fwoar/json-nav--path))))
(sort (cl-etypecase data
(hash-table (hash-table-keys data))
(vector (remove-duplicates (sort (fwoar/json-nav--with-collector (c)
(fwoar/json-nav--pierce-vectors
(lambda (next)
(when next
(map nil #'c
(hash-table-keys next))))
data))
'string<)
:test 'equal)))
'string<)))
(defun fwoar/dive (s)
(interactive (list (completing-read "key? "
(fwoar/json-nav--get-keys))))
(fwoar/json--ensure-data)
(let* ((path (cons s fwoar/json-nav--path))
(data fwoar/json-nav--data))
(with-current-buffer (switch-to-buffer-other-window
(format "*test-buffer: %s*"
(s-join "/" (reverse path))))
(json-mode)
(setq-local fwoar/json-nav--data data
fwoar/json-nav--path path)
(setf (buffer-string)
(json-serialize (fwoar/json-nav--get-path fwoar/json-nav--data
(reverse path))
:null-object nil))
(json-pretty-print-buffer)
(goto-char (point-min))))
(goto-char (point-min)))
(defun fwoar/return ()
(interactive)
(fwoar/json--ensure-data)
(let ((prev-buffer (format "*test-buffer: %s*"
(s-join "/" (reverse (cdr fwoar/json-nav--path))))))
(kill-buffer)
(switch-to-buffer-other-window prev-buffer))
(point-min))
(provide 'fwoar-json-navigator)
;;; fwoar-json-navigator.el ends here