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;;
;; Copyright (C) 2011 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
;;
;; 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 this program; if not, write to the Free Software Foundation,
;; Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
(define-module (mu)
:use-module (oop goops)
:use-module (mu log)
:use-module (mu msg)
:use-module (mu contact)
:export
(for-each-contact
for-each-message)) ;; note, defined in libguile-mu (in c)
(load-extension "libguile-mu" "mu_guile_init")
(define* (for-each-contact proc #:optional (expr ""))
"Execute PROC for each contact. PROC receives a <contact> instance
as parameter. If EXPR is specified, only consider contacts in messages
matching EXPR."
(let ((c-hash (make-hash-table 4096)))
(for-each-message
(lambda (msg)
(for-each
(lambda (name-addr)
(let ((contact (make <contact>
#:name (car name-addr)
#:email (cdr name-addr)
#:timestamp (mu:msg:date msg))))
(update-contacts-hash c-hash contact)))
(append (mu:msg:to msg) (mu:msg:from msg) (mu:msg:cc msg)
(mu:msg:bcc msg))))
expr)
;; c-hash now contains a map of email->contact
(hash-for-each
(lambda (email contact) (proc contact)) c-hash)))
(define-method (update-contacts-hash c-hash (nc <contact>))
"Update the contacts hash with a new and/or existing contact."
;; xc: existing-contact, nc: new contact
(let ((xc (hash-ref c-hash (email nc))))
(if (not xc) ;; no existing contact with this email address?
(hash-set! c-hash (email nc) nc) ;; store the new contact.
;; otherwise:
(begin
;; 1) update the frequency for the existing contact
(set! (frequency xc) (1+ (frequency xc)))
;; 2) update the name if the new one is not empty and its timestamp is newer
;; in that case, also update the timestamp
(if (and (name nc) (> (string-length (name nc)))
(> (timestamp nc) (timestamp xc)))
(set! (name xc) (name nc))
(set! (timestamp xc) (timestamp nc)))
;; 3) update last-seen with timestamp, if x's timestamp is newer
(if (> (timestamp nc) (last-seen xc))
(set! (last-seen xc) (timestamp nc)))
;; okay --> now xc has been updated; but it back in the hash
(hash-set! c-hash (email xc) xc)))))
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