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+;;; 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 network)
+ #:use-module (gnu installer connman)
+ #:use-module (gnu installer steps)
+ #:use-module (gnu installer utils)
+ #:use-module (gnu installer newt ethernet)
+ #:use-module (gnu installer newt page)
+ #:use-module (gnu installer newt wifi)
+ #:use-module (guix i18n)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-11)
+ #:use-module (srfi srfi-34)
+ #:use-module (srfi srfi-35)
+ #:use-module (newt)
+ #:export (run-network-page))
+
+;; Maximum length of a technology name.
+(define technology-name-max-length (make-parameter 20))
+
+(define (technology->text technology)
+ "Return a string describing the given TECHNOLOGY."
+ (let* ((name (technology-name technology))
+ (padded-name (string-pad-right name
+ (technology-name-max-length))))
+ (format #f "~a~%" padded-name)))
+
+(define (run-technology-page)
+ "Run a page to ask the user which technology shall be used to access
+Internet and return the selected technology. For now, only technologies with
+\"ethernet\" or \"wifi\" types are supported."
+ (define (technology-items)
+ (filter (lambda (technology)
+ (let ((type (technology-type technology)))
+ (or
+ (string=? type "ethernet")
+ (string=? type "wifi"))))
+ (connman-technologies)))
+
+ (run-listbox-selection-page
+ #:info-text (G_ "The install process requires an internet access.\
+ Please select a network technology.")
+ #:title (G_ "Technology selection")
+ #:listbox-items (technology-items)
+ #:listbox-item->text technology->text
+ #:button-text (G_ "Cancel")
+ #:button-callback-procedure
+ (lambda _
+ (raise
+ (condition
+ (&installer-step-abort))))))
+
+(define (find-technology-by-type technologies type)
+ "Find and return a technology with the given TYPE in TECHNOLOGIES list."
+ (find (lambda (technology)
+ (string=? (technology-type technology)
+ type))
+ technologies))
+
+(define (wait-technology-powered technology)
+ "Wait and display a progress bar until the given TECHNOLOGY is powered."
+ (let ((name (technology-name technology))
+ (full-value 5))
+ (run-scale-page
+ #:title (G_ "Powering technology")
+ #:info-text (format #f "Waiting for technology ~a to be powered." name)
+ #:scale-full-value full-value
+ #:scale-update-proc
+ (lambda (value)
+ (let* ((technologies (connman-technologies))
+ (type (technology-type technology))
+ (updated-technology
+ (find-technology-by-type technologies type))
+ (technology-powered? updated-technology))
+ (sleep 1)
+ (if technology-powered?
+ full-value
+ (+ value 1)))))))
+
+(define (wait-service-online)
+ "Display a newt scale until connman detects an Internet access. Do
+FULL-VALUE tentatives, spaced by 1 second."
+ (let* ((full-value 5))
+ (run-scale-page
+ #:title (G_ "Checking connectivity")
+ #:info-text (G_ "Waiting internet access is established")
+ #:scale-full-value full-value
+ #:scale-update-proc
+ (lambda (value)
+ (sleep 1)
+ (if (connman-online?)
+ full-value
+ (+ value 1))))
+ (unless (connman-online?)
+ (run-error-page
+ (G_ "The selected network does not provide an Internet \
+access, please try again.")
+ (G_ "Connection error"))
+ (raise
+ (condition
+ (&installer-step-abort))))))
+
+(define (run-network-page)
+ "Run a page to allow the user to configure connman so that it can access the
+Internet."
+ (define network-steps
+ (list
+ ;; Ask the user to choose between ethernet and wifi technologies.
+ (installer-step
+ (id 'select-technology)
+ (compute
+ (lambda _
+ (run-technology-page))))
+ ;; Enable the previously selected technology.
+ (installer-step
+ (id 'power-technology)
+ (compute
+ (lambda (result)
+ (let ((technology (result-step result 'select-technology)))
+ (connman-enable-technology technology)
+ (wait-technology-powered technology)))))
+ ;; Propose the user to connect to one of the service available for the
+ ;; previously selected technology.
+ (installer-step
+ (id 'connect-service)
+ (compute
+ (lambda (result)
+ (let* ((technology (result-step result 'select-technology))
+ (type (technology-type technology)))
+ (cond
+ ((string=? "wifi" type)
+ (run-wifi-page))
+ ((string=? "ethernet" type)
+ (run-ethernet-page)))))))
+ ;; Wait for connman status to switch to 'online, which means it can
+ ;; access Internet.
+ (installer-step
+ (id 'wait-online)
+ (compute (lambda _
+ (wait-service-online))))))
+ (run-installer-steps
+ #:steps network-steps
+ #:rewind-strategy 'start))