;;; ob-ttl.el --- org-babel functions for ttl evaluation

 ;; Copyright (C) Dr. Ian FitzPatrick

 ;; Author: Dr. Ian FitzPatrick
 ;; Keywords: literate programming, reproducible research
 ;; Homepage: https://orgmode.org
 ;; Version: 0.01

 ;;; License:

 ;; 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, 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 GNU Emacs; see the file COPYING.  If not, write to the
 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 ;; Boston, MA 02110-1301, USA.

 ;;; Commentary:
 ;;
 ;; process ttl documents with ttl from org babel
 ;;

 ;;; Requirements:

 ;; ttlproc

 ;;; Code:
 (require 'ob)
 (require 'ob-ref)
 (require 'ob-comint)
 (require 'ob-eval)
 (require 's)

 ;; possibly require modes required for your language
 ;; (define-derived-mode ttl-mode "ttl"
 ;;   "Major mode for editing ttl files."
 ;;   )



 ;; ;; optionally define a file extension for this language
 (add-to-list 'org-babel-tangle-lang-exts '("ttl" . "ttl"))

 ;; optionally declare default header arguments for this language
 (defvar org-babel-default-header-args:ttl '()) ; TODO use this for input in stead of variable

 ;; This function expands the body of a source code block by doing
 ;; things like prepending argument definitions to the body, it should
 ;; be called by the `org-babel-execute:ttl' function below.
 (defun org-babel-expand-body:ttl (body params &optional processed-params)
   "Expand BODY according to PARAMS, return the expanded body."
					  ;(require 'inf-ttl) : TODO check if needed
   body ; TODO translate params to ttl variables
   )

 ;; This is the main function which is called to evaluate a code
 ;; block.
 ;;
 ;; This function will evaluate the body of the source code and
 ;; return the results as emacs-lisp depending on the value of the
 ;; :results header argument
 ;; - output means that the output to STDOUT will be captured and
 ;;   returned
 ;; - value means that the value of the last statement in the
 ;;   source code block will be returned
 ;;
 ;; The most common first step in this function is the expansion of the
 ;; PARAMS argument using `org-babel-process-params'.
 ;;
 ;; Please feel free to not implement options which aren't appropriate
 ;; for your language (e.g. not all languages support interactive
 ;; "session" evaluation).  Also you are free to define any new header
 ;; arguments which you feel may be useful -- all header arguments
 ;; specified by the user will be available in the PARAMS variable.
 (defun org-babel-execute:ttl (body params)
   "Execute a block of ttl code with org-babel.
 This function is called by `org-babel-execute-src-block'"
   (message "executing ttl source code block")
   (let*
	((ttl (or (cdr (cdr (assoc :var params) ) ) ""))

	 (ttl (s-replace-regexp "^#\+.*\n" "" ttl))) ; remove orgmode markup from input

     (org-babel-eval-ttl body ttl)
     ;; when forming a shell command, or a fragment of code in some
     ;; other language, please preprocess any file names involved with
     ;; the function `org-babel-process-file-name'. (See the way that
     ;; function is used in the language files)
     ))
					  ;

 (defun org-babel-eval-ttl (body ttl)
   "Run CMD on BODY.
 If CMD succeeds then return its results, otherwise display
 STDERR with `org-babel-eval-error-notify'."
   (let ((ttl-file (org-babel-temp-file "ob-ttl-" ".ttl"))
	  (output-file (org-babel-temp-file "ob-ttl-out-")))
     (with-temp-file ttl-file (insert body))
     (async-start-process "apache-jena-fuseki" (executable-find "fuseki-server") nil "--file" ttl-file "/ob-ttl")
	))

 ;; This function should be used to assign any variables in params in
 ;; the context of the session environment.
 (defun org-babel-prep-session:ttl (session params)
   "Prepare SESSION according to the header arguments specified in PARAMS."
   )

 (defun org-babel-ttl-var-to-ttl (var)
   "Convert an elisp var into a string of ttl source code
 specifying a var of the same value."
   (format "%S" var))

 (defun org-babel-ttl-table-or-string (results)
   "If the results look like a table, then convert them into an
 Emacs-lisp table, otherwise return the results as a string."
   )

 (defun org-babel-ttl-initiate-session (&optional session)
   "If there is not a current inferior-process-buffer in SESSION then create.
 Return the initialized session."
   (unless (string= session "none")
     ))

 (provide 'ob-ttl)
 ;;; ob-ttl.el ends here