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guix/gnu/build/jami-service.scm
Maxim Cournoyer 21afbf54cd
build: jami-service: account->username always return a fingerprint.
This change is motivated by the fact that Account.registeredName is a volatile
account data, not exported along the account and retrieved from the name
server.  Have it always return Account.username instead, so that the result is
reproducible independent of whether networking is available or not.

* gnu/build/jami-service.scm (account->username): Always return the account
fingerprint.  Adjust doc.
(id->username): Likewise.
2022-09-23 23:56:15 -04:00

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021, 2022 Maxim Cournoyer <maxim.cournoyer@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/>.
;;; Commentary:
;;;
;;; This module contains helpers used as part of the jami-service-type
;;; definition.
;;;
;;; Code:
(define-module (gnu build jami-service)
#:use-module (gnu build dbus-service)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (jami-service-available?
account-fingerprint?
account-details->recutil
get-accounts
get-usernames
set-account-details
add-account
account->username
username->account
username->contacts
enable-account
disable-account
add-contact
remove-contact
set-all-moderators
set-moderator
username->all-moderators?
username->moderators))
;;;
;;; Utilities.
;;;
(define (alist->list alist)
"Flatten ALIST into a list."
(append-map (match-lambda
(() '())
((key . value)
(list key value)))
alist))
(define account-fingerprint-rx (make-regexp "[0-9A-Fa-f]{40}"))
(define (account-fingerprint? val)
"A Jami account fingerprint is 40 characters long and only contains
hexadecimal characters."
(and (string? val)
(regexp-exec account-fingerprint-rx val)))
(define (validate-fingerprint fingerprint)
"Validate that fingerprint is 40 characters long."
(unless (account-fingerprint? fingerprint)
(error "Account fingerprint is not valid:" fingerprint)))
(define (jami-service-available?)
"Whether the Jami D-Bus service was acquired by the D-Bus daemon."
(unless (%current-dbus-connection)
(initialize-dbus-connection!))
(dbus-service-available? "cx.ring.Ring"))
;;;
;;; Bindings for the Jami D-Bus API.
;;;
(define* (call-configuration-manager-method method #:optional arguments
#:key timeout)
"Query the Jami D-Bus ConfigurationManager interface with METHOD applied to
ARGUMENTS. TIMEOUT can optionally be provided as a value in seconds."
(unless (%current-dbus-connection)
(initialize-dbus-connection!))
(call-dbus-method method
#:path "/cx/ring/Ring/ConfigurationManager"
#:destination "cx.ring.Ring"
#:interface "cx.ring.Ring.ConfigurationManager"
#:arguments arguments
#:timeout timeout))
;;; The following methods are for internal use; they make use of the account
;;; ID, an implementation detail of Jami the user should not need to be
;;; concerned with.
(define (get-account-ids)
"Return the available Jami account identifiers (IDs). Account IDs are an
implementation detail used to identify the accounts in Jami."
(vector->list (call-configuration-manager-method "getAccountList")))
(define (id->account-details id)
"Retrieve the account data associated with the given account ID."
(vector->list (call-configuration-manager-method "getAccountDetails"
(list id))))
(define (id->volatile-account-details id)
"Retrieve the account data associated with the given account ID."
(vector->list (call-configuration-manager-method "getVolatileAccountDetails"
(list id))))
(define (id->account id)
"Retrieve the complete account data associated with the given account ID."
(append (id->volatile-account-details id)
(id->account-details id)))
(define %username-to-id-cache #f)
(define (invalidate-username-to-id-cache!)
(set! %username-to-id-cache #f))
(define (username->id username)
"Return the first account ID corresponding to USERNAME."
(unless (assoc-ref %username-to-id-cache username)
(set! %username-to-id-cache
(append-map
(lambda (id)
(let* ((account (id->account id))
(username (assoc-ref account "Account.username"))
(registered-name (assoc-ref account
"Account.registeredName")))
`(,@(if username
(list (cons username id))
'())
,@(if registered-name
(list (cons registered-name id))
'()))))
(get-account-ids))))
(or (assoc-ref %username-to-id-cache username)
(let ((message (format #f "no account ID for ~:[username~;fingerprint~]"
(account-fingerprint? username))))
(error message username))))
(define (account->username account)
"Return the public key fingerprint of ACCOUNT."
(assoc-ref account "Account.username"))
(define (id->username id)
"Return the public key fingerprint corresponding to account with ID, else #f."
(account->username (id->account id)))
(define (get-accounts)
"Return the list of all accounts, as a list of alists."
(map id->account (get-account-ids)))
(define (get-usernames)
"Return the list of the usernames associated with the present accounts."
(map account->username (get-accounts)))
(define (username->account username)
"Return the first account associated with USERNAME, else #f.
USERNAME can be either the account 40 characters public key fingerprint or a
registered username."
(find (lambda (account)
(member username
(list (assoc-ref account "Account.username")
(assoc-ref account "Account.registeredName"))))
(get-accounts)))
(define (add-account archive)
"Import the Jami account ARCHIVE and return its account ID. The archive
should *not* be encrypted with a password. Return the username associated
with the account."
(invalidate-username-to-id-cache!)
(let ((id (call-configuration-manager-method
"addAccount" (list `#(("Account.archivePath" . ,archive)
("Account.type" . "RING"))))))
;; The account information takes some time to be populated.
(with-retries 20 1
(let ((username (id->username id)))
(if (and=> username (negate string-null?))
username
#f)))))
(define (remove-account username)
"Delete the Jami account associated with USERNAME, the account 40 characters
fingerprint or a registered username."
(let ((id (username->id username)))
(call-configuration-manager-method "removeAccount" (list id)))
(invalidate-username-to-id-cache!))
(define* (username->contacts username)
"Return the contacts associated with the account of USERNAME as two values;
the first one being the regular contacts and the second one the banned
contacts. USERNAME can be either the account 40 characters public key
fingerprint or a registered username. The contacts returned are represented
using their 40 characters fingerprint."
(let* ((id (username->id username))
;; The contacts are returned as "aa{ss}", that is, an array of arrays
;; containing (string . string) pairs.
(contacts (map vector->list
(vector->list (call-configuration-manager-method
"getContacts" (list id)))))
(banned? (lambda (contact)
(and=> (assoc-ref contact "banned")
(cut string=? "true" <>))))
(banned (filter banned? contacts))
(not-banned (filter (negate banned?) contacts))
(fingerprint (cut assoc-ref <> "id")))
(values (map fingerprint not-banned)
(map fingerprint banned))))
(define* (remove-contact contact username #:key ban?)
"Remove CONTACT, the 40 characters public key fingerprint of a contact, from
the account associated with USERNAME (either a fingerprint or a registered
username). When BAN? is true, also mark the contact as banned."
(validate-fingerprint contact)
(let ((id (username->id username)))
(call-configuration-manager-method "removeContact" (list id contact ban?))))
(define (add-contact contact username)
"Add CONTACT, the 40 characters public key fingerprint of a contact, to the
account of USERNAME (either a fingerprint or a registered username)."
(validate-fingerprint contact)
(let ((id (username->id username)))
(call-configuration-manager-method "addContact" (list id contact))))
(define* (set-account-details details username #:key timeout)
"Set DETAILS, an alist containing the key value pairs to set for the account
of USERNAME, a registered username or account fingerprint. The value of the
parameters not provided are unchanged. TIMEOUT is a value in milliseconds to
pass to the `call-configuration-manager-method' procedure."
(let* ((id (username->id username))
(current-details (id->account-details id))
(updated-details (map (match-lambda
((key . value)
(or (and=> (assoc-ref details key)
(cut cons key <>))
(cons key value))))
current-details)))
(call-configuration-manager-method
"setAccountDetails" (list id (list->vector updated-details))
#:timeout timeout)))
(define (set-all-moderators enabled? username)
"Set the 'AllModerators' property to enabled? for the account of USERNAME, a
registered username or account fingerprint."
(let ((id (username->id username)))
(call-configuration-manager-method "setAllModerators" (list id enabled?))))
(define (username->all-moderators? username)
"Return the 'AllModerators' property for the account of USERNAME, a
registered username or account fingerprint."
(let ((id (username->id username)))
(call-configuration-manager-method "isAllModerators" (list id))))
(define (username->moderators username)
"Return the moderators for the account of USERNAME, a registered username or
account fingerprint."
(let* ((id (username->id username)))
(vector->list (call-configuration-manager-method "getDefaultModerators"
(list id)))))
(define (set-moderator contact enabled? username)
"Set the moderator flag to ENABLED? for CONTACT, the 40 characters public
key fingerprint of a contact for the account of USERNAME, a registered
username or account fingerprint."
(validate-fingerprint contact)
(let* ((id (username->id username)))
(call-configuration-manager-method "setDefaultModerator"
(list id contact enabled?))))
(define (disable-account username)
"Disable the account known by USERNAME, a registered username or account
fingerprint."
(set-account-details '(("Account.enable" . "false")) username
;; Waiting for the reply on this command takes a very
;; long time that trips the default D-Bus timeout value
;; (25 s), for some reason.
#:timeout 60))
(define (enable-account username)
"Enable the account known by USERNAME, a registered username or account
fingerprint."
(set-account-details '(("Account.enable" . "true")) username))
;;;
;;; Presentation procedures.
;;;
(define (.->_ text)
"Map each period character to underscore characters."
(string-map (match-lambda
(#\. #\_)
(c c))
text))
(define (account-details->recutil account-details)
"Serialize the account-details alist into a recutil string. Period
characters in the keys are normalized to underscore to meet Recutils' format
requirements."
(define (pair->recutil-property pair)
(match pair
((key . value)
(string-append (.->_ key) ": " value))))
(define sorted-account-details
;; Have the account username, display name and alias appear first, for
;; convenience.
(let ((first-items '("Account.username"
"Account.displayName"
"Account.alias")))
(append (map (cut assoc <> account-details) first-items)
(fold alist-delete account-details first-items))))
(string-join (map pair->recutil-property sorted-account-details) "\n"))