mirror of https://github.com/djcb/mu.git
82 lines
3.1 KiB
Scheme
82 lines
3.1 KiB
Scheme
;;
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;; Copyright (C) 2011 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;;
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;; This program is free software; you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published by the
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;; Free Software Foundation; either version 3, or (at your option) any
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;; later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, write to the Free Software Foundation,
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;; Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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;; some guile/scheme functions to get various statistics of my mu
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;; message store.
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(define-module (mu contact)
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:use-module (oop goops)
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:use-module (mu message)
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:export ( ;; classes
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<mu-contact>
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;; global methods
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mu:for-each-contact
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;; contact methods
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name email timestamp frequency last-seen
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))
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(define-class <mu-contact> ()
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(name #:init-value #f #:accessor name #:init-keyword #:name)
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(email #:init-value #f #:accessor email #:init-keyword #:email)
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(tstamp #:init-value 0 #:accessor timestamp #:init-keyword #:timestamp)
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(last-seen #:init-value 0 #:accessor last-seen)
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(freq #:init-value 1 #:accessor frequency))
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(define* (mu:for-each-contact proc #:optional (expr #t))
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"Execute PROC for each contact. PROC receives a <mu-contact> instance
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as parameter. If EXPR is specified, only consider contacts in messages
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matching EXPR."
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(let ((c-hash (make-hash-table 4096)))
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(mu:for-each-message
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(lambda (msg)
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(for-each
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(lambda (name-addr)
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(let ((contact (make <mu-contact>
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#:name (car name-addr)
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#:email (cdr name-addr)
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#:timestamp (date msg))))
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(update-contacts-hash c-hash contact)))
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(contacts msg #t)))
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expr)
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;; c-hash now contains a map of email->contact
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(hash-for-each
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(lambda (email contact) (proc contact)) c-hash)))
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(define-method (update-contacts-hash c-hash (nc <mu-contact>))
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"Update the contacts hash with a new and/or existing contact."
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;; xc: existing-contact, nc: new contact
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(let ((xc (hash-ref c-hash (email nc))))
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(if (not xc) ;; no existing contact with this email address?
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(hash-set! c-hash (email nc) nc) ;; store the new contact.
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;; otherwise:
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(begin
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;; 1) update the frequency for the existing contact
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(set! (frequency xc) (1+ (frequency xc)))
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;; 2) update the name if the new one is not empty and its timestamp is newer
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;; in that case, also update the timestamp
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(if (and (name nc) (> (string-length (name nc)))
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(> (timestamp nc) (timestamp xc)))
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(set! (name xc) (name nc))
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(set! (timestamp xc) (timestamp nc)))
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;; 3) update last-seen with timestamp, if x's timestamp is newer
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(if (> (timestamp nc) (last-seen xc))
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(set! (last-seen xc) (timestamp nc)))
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;; okay --> now xc has been updated; but it back in the hash
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(hash-set! c-hash (email xc) xc)))))
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