;;; 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

;;; 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