;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu installer newt timezone)
  #:use-module (gnu installer steps)
  #:use-module (gnu installer timezone)
  #:use-module (gnu installer newt page)
  #:use-module (guix i18n)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (ice-9 match)
  #:use-module (ice-9 receive)
  #:use-module (newt)
  #:export (run-timezone-page))

;; Information textbox width.
(define info-textbox-width (make-parameter 40))

(define (fill-timezones listbox timezones)
  "Fill the given LISTBOX with TIMEZONES. Return an association list
correlating listbox keys with timezones."
  (map (lambda (timezone)
         (let ((key (append-entry-to-listbox listbox timezone)))
           (cons key timezone)))
       timezones))

(define (run-timezone-page zonetab)
  "Run a page displaying available timezones, grouped by regions. The user is
invited to select a timezone. The selected timezone, under Posix format is
returned."
  (define (all-but-last list)
    (reverse (cdr (reverse list))))

  (define (run-page timezone-tree)
    (define (loop path)
      ;; XXX: Translation of time zones isn't perfect here because the
      ;; "iso_3166-1" domain contains translation for "territories" (like
      ;; "Antarctic") but not for continents (like "Africa").
      (let ((timezones (locate-children timezone-tree path)))
        (run-listbox-selection-page
         #:title (G_ "Timezone")
         #:info-text (G_ "Please select a timezone.")
         #:listbox-items timezones
         #:listbox-item->text (cut gettext <> "iso_3166-1")
         #:button-text (if (null? path)
                           (G_ "Exit")
                           (G_ "Back"))
         #:button-callback-procedure
         (if (null? path)
             (lambda _
               (raise
                (condition
                 (&installer-step-abort))))
             (lambda _
               (loop (all-but-last path))))
         #:listbox-callback-procedure
         (lambda (timezone)
           (let* ((timezone* (append path (list timezone)))
                  (tz (timezone->posix-tz timezone*)))
             (if (timezone-has-child? timezone-tree timezone*)
                 (loop timezone*)
                 tz))))))
    (loop '()))

  (let ((timezone-tree (zonetab->timezone-tree zonetab)))
    (run-page timezone-tree)))
s='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-31 22:12:56 -0600'>2019-01-31</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=4b444fc5a59cbb5e5b45944c0067fb91f73bfe1f'>gnu: imb: Update to 2019.1.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2019-01-25 13:21:19 +0100'>2019-01-25</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=1530b17aa14df91399f2dab0f5ee7951e27c6071'>gnu: imb: Use INVOKE.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-15 14:46:44 +0100'>2019-01-15</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=44d10b1f722856ab8e9b942804aa7ef33e2ef739'>gnu: Separate Python core packages from the rest.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2018-11-07 21:09:00 +0100'>2018-11-07</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=b31e1561611ebe4916890183b24e6e13cb83bf59'>gnu: fio: Update to 3.11.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-06-14 15:41:09 +0200'>2018-06-14</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=f715f102e076872d560ea2c12a9618f99ef1f707'>gnu: fio: Update to 3.7.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2018-04-26 21:08:58 +0200'>2018-04-26</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=1cc3e26b6aeb4acd406b7f57a436bf4c4b35aa93'>gnu: fio: Use INVOKE.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-04-25 15:09:22 +0200'>2018-04-25</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=5843dab8fbb8f4583e37c16a9295b7b7917eebd8'>gnu: fio: Update to 3.6.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-02-22 14:15:17 +0100'>2018-02-22</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=fdc38cb6caa1a99f723c3adb7e8dc86341af2bb0'>gnu: fio: Update to 3.5.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-02-14 20:23:19 +0100'>2018-02-14</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=1a46a6d02d55e50062fd767ce14cadbbbdc0e9f5'>gnu: fio: Update to 3.4.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-01-10 23:40:36 +0100'>2018-01-10</span></td><td><a href='/guix/commit/gnu/packages/benchmark.scm?id=cd661a4175ec1a51ec69aee8cec398b20fd29df7'>gnu: fio: Update to 3.3.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>