sts-mode.el

;;; sts-mode.el --- Safe-to-Spend

;; Copyright (C) 2012  Ian Eure

;; Author: Ian Eure <ian.eure@gmail.com>
;; Keywords:

;; 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:

;;

;;; Code:

(require 'json)

(defgroup sts nil
  "Safe-to-Spend™"
  :prefix "sts-"
  :group 'net)

(defcustom sts-user-id nil
  "Your Simple userId.")

(defvar sts-timer nil)
(defvar sts-object " ")


(defun letify (balances)
  (mapcar (lambda (p) (list (car p) (/ (cdr p) 10000.0))) balances))

(defmacro sts-with-balances (balances &rest body)
  `(let ,(letify (eval balances))
     ,@body))

(defun sts-parse (&rest args)
  (goto-char (point-min))
  (re-search-forward "\n
?\n
?")
  (sts-with-balances (json-read)
    (setq sts-object (format " |$%.2f<™" safe_to_spend))))

(defun sts-refresh ()
  (let ((url-show-status nil))
    (url-http
     (url-generic-parse-url
      (format "http://int-api.banksimple.com/txs-api/users/%s/balances"
              sts-user-id)) 'sts-parse nil)))

(defun sts-enable ()
  ;;(setq sts-timer (run-at-time "1 min" (* 60 60) 'sts-refresh))
  (add-to-list 'mode-line-modes '(t sts-object))
  (sts-refresh))

(defun sts-disable ()
  (setq mode-line-modes (remove '(t sts-object) mode-line-modes))
  (ignore-errors
      (cancel-timer sts-timer)
    (setq sts-timer nil)))

(define-minor-mode sts-mode "Show Safe-to-Spend™ in your modeline"
  nil nil nil
  (cond (sts-timer (sts-disable))
        (t (sts-enable))))

(provide 'sts-mode)
;;; sts-mode.el ends here

what's this language...