;; mixi.el --- API library for accessing to mixi

;; Copyright (C) 2005,2006 OHASHI Akira

;; Author: OHASHI Akira <bg66@koka-in.org>
;; Keywords: hypermedia

;; This file is *NOT* a part of Emacs.

;; 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 2, 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, you can either send email to this
;; program's maintainer or write to: The Free Software Foundation,
;; Inc.; 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

;;; Commentary:

;; API for getting contents:
;;
;;  * mixi-get-friends
;;  * mixi-get-favorites
;;  * mixi-get-logs
;;  * mixi-get-diaries
;;  * mixi-get-new-diaries
;;  * mixi-get-communities
;;  * mixi-get-topics
;;  * mixi-get-new-topics
;;  * mixi-get-comments
;;  * mixi-get-new-comments
;;  * mixi-get-messages

;; Example:
;;
;; Display newest 3 diaries like a mail format.
;;
;; (let ((max-numbers 3)
;;       (buffer (generate-new-buffer "*temp*"))
;;       (format "%Y/%m/%d %H:%M"))
;;   (pop-to-buffer buffer)
;;   (mapc (lambda (diary)
;; 	  (let ((subject (mixi-diary-title diary))
;; 		;; Don't get owner's nick at first for omitting a useless
;; 		;; retrieval.
;; 		(from (mixi-friend-nick (mixi-diary-owner diary)))
;; 		(date (format-time-string format (mixi-diary-time diary)))
;; 		(body (mixi-diary-content diary)))
;; 	    (insert "From: " from "\n"
;; 		    "Subject: " subject "\n"
;; 		    "Date: " date "\n\n"
;; 		    body "\n\n")))
;; 	(mixi-get-new-diaries max-numbers))
;;   (set-buffer-modified-p nil)
;;   (setq buffer-read-only t)
;;   (goto-char (point-min)))
;;
;; Display newest 3 diaries including newest 3 comments like a mail format.
;; Comments are displayed like a reply mail.
;;
;; (let ((max-numbers 3)
;;       (buffer (generate-new-buffer "*temp*"))
;;       (format "%Y/%m/%d %H:%M"))
;;   (pop-to-buffer buffer)
;;   (mapc (lambda (diary)
;; 	  (let ((subject (mixi-diary-title diary))
;;  		;; Don't get owner's nick at first for omitting a useless
;;  		;; retrieval.
;;  		(from (mixi-friend-nick (mixi-diary-owner diary)))
;; 		(date (format-time-string format (mixi-diary-time diary)))
;; 		(body (mixi-diary-content diary)))
;; 	    (insert "From: " from "\n"
;; 		    "Subject: " subject "\n"
;; 		    "Date: " date "\n\n"
;; 		    body "\n\n")
;; 	    (mapc (lambda (comment)
;; 		    (let ((from (mixi-friend-nick
;; 				 (mixi-comment-owner comment)))
;; 			  (subject (concat "Re: " subject))
;; 			  (date (format-time-string
;; 				 format (mixi-comment-time comment)))
;; 			  (body (mixi-comment-content comment)))
;; 		      (insert "From: " from "\n"
;; 			      "Subject: " subject "\n"
;; 			      "Date: " date "\n\n"
;; 			      body "\n\n")))
;; 		  (mixi-get-comments diary max-numbers))))
;; 	(mixi-get-new-diaries max-numbers))
;;   (set-buffer-modified-p nil)
;;   (setq buffer-read-only t)
;;   (goto-char (point-min)))

;;; Code:

(condition-case nil
    (require 'url)
  (error))

(condition-case nil
    (require 'w3m)
  (error))

(eval-when-compile (require 'cl))

(defgroup mixi nil
  "API library for accessing to mixi."
  :group 'hypermedia)

(defcustom mixi-url "http://mixi.jp"
  "*The URL of mixi."
  :type 'string
  :group 'mixi)

(defcustom mixi-coding-system 'euc-jp
  "*Coding system for mixi."
  :type 'coding-system
  :group 'mixi)

(defcustom mixi-retrieve-function
  (if (fboundp 'url-retrieve-synchronously)
      'mixi-w3-retrieve 'mixi-w3m-retrieve)
  "*The function for retrieving."
  :type '(choice (const :tag "Using w3" mixi-w3-retrieve)
		 (const :tag "Using w3m" mixi-w3m-retrieve)
		 (const :tag "Using curl" mixi-curl-retrieve)
		 (function :format "Other function: %v\n" :size 0))
  :group 'mixi)

(defcustom mixi-curl-program "curl"
  "*The program name of `curl'."
  :type 'file
  :group 'mixi)

(defcustom mixi-curl-cookie-file (expand-file-name "~/.mixi-cookies.txt")
  "*The location of cookie file created by `curl'."
  :type 'file
  :group 'mixi)

(defcustom mixi-default-email nil
  "*Default E-mail address that is used to login automatically."
  :type '(choice (string :tag "E-mail address")
		 (const :tag "Asked when it is necessary" nil))
  :group 'mixi)

(defcustom mixi-default-password nil
  "*Default password that is used to login automatically."
  :type '(choice (string :tag "Password")
		 (const :tag "Asked when it is necessary" nil))
  :group 'mixi)

(defcustom mixi-accept-adult-contents t
  "*If non-nil, accept to access to the adult contents."
  :type 'boolean
  :group 'mixi)

(defcustom mixi-continuously-access-interval 4.0
  "*Time interval between each mixi access.
Increase this value when unexpected error frequently occurs."
  :type 'number
  :group 'mixi)

(defcustom mixi-cache-expires 3600
  "*Seconds for expiration of a cached object."
  :type '(choice (integer :tag "Expired seconds")
		 (const :tag "Don't expire" nil))
  :group 'mixi)

;; FIXME: Not implemented.
(defcustom mixi-cache-use-file t
  "*If non-nil, caches are saved to files."
  :type 'boolean
  :group 'mixi)

(defcustom mixi-cache-directory (expand-file-name "~/.mixi")
  "*Where to look for cache files."
  :type 'directory
  :group 'mixi)

(defvar mixi-me nil)

;; Utilities.
(defmacro mixi-message (string)
  `(concat "[mixi] " ,string))

(defconst mixi-message-adult-contents
  "このページから先はアダルト（成人向け）コンテンツが含まれています。<br>
閲覧に同意された方のみ、先へお進みください。")
(defconst mixi-message-continuously-accessing
  "安定してサイトの運営をおこなう為、間隔を空けない連続的なページの遷移・更<br>
新は制限させていただいております。ご迷惑をおかけいたしますが、しばらくお<br>
待ちいただいてから操作をおこなってください。")
(defconst mixi-warning-continuously-accessing
  "間隔を空けない連続的なページの遷移・更新を頻繁におこなわれていることが見<br>
受けられましたので、一時的に操作を停止させていただきます。申し訳ございま<br>
せんが、しばらくの間お待ちください。")

(defun mixi-retrieve-1 (buffer url &optional post-data)
  (when (string-match mixi-message-adult-contents buffer)
    (if mixi-accept-adult-contents
	(setq buffer (funcall mixi-retrieve-function url "submit=agree"))
      (setq buffer (funcall mixi-retrieve-function (concat url "?")))))
  (when (string-match mixi-warning-continuously-accessing buffer)
    (error (mixi-message "Continuously accessing")))
  (if (not (string-match mixi-message-continuously-accessing buffer))
      buffer
    (message (mixi-message "Waiting for continuously accessing..."))
    (sit-for mixi-continuously-access-interval)
    (funcall mixi-retrieve-function url post-data)))

(defun mixi-w3-retrieve (url &optional post-data)
  "Retrieve the URL and return gotten strings."
  (if post-data
      (progn
	(setq url-request-method "POST")
	(setq url-request-data post-data))
    (setq url-request-method "GET")
    (setq url-request-data nil))
  (let* ((url (url-expand-file-name url mixi-url))
	 (buffer (url-retrieve-synchronously url))
	 ret)
    (unless (bufferp buffer)
      (error (mixi-message "Cannot retrieve")))
    (with-current-buffer buffer
      (goto-char (point-min))
      (if (re-search-forward "HTTP/[0-9.]+ 302 Moved" nil t)
	  (if (re-search-forward
	       (concat "Location: " mixi-url "\\(.+\\)") nil t)
	      (setq ret (mixi-w3-retrieve (match-string 1) post-data))
	    (setq ret (mixi-w3-retrieve "/home.pl" post-data)))
	(unless (re-search-forward "HTTP/[0-9.]+ 200 OK" nil t)
	  (error (mixi-message "Cannot retrieve")))
	(search-forward "\n\n")
	(setq ret (mm-decode-coding-string
		   (buffer-substring-no-properties (point) (point-max))
		   mixi-coding-system))
	(kill-buffer buffer)
	(setq ret (mixi-retrieve-1 ret url post-data))))
    ret))

(defun mixi-w3m-retrieve (url &optional post-data)
  "Retrieve the URL and return gotten strings."
  (let ((url (w3m-expand-url url mixi-url)))
    (with-temp-buffer
      (if (not (string= (w3m-retrieve url nil nil post-data) "text/html"))
	  (error (mixi-message "Cannot retrieve"))
	(w3m-decode-buffer url)
	(let ((ret (buffer-substring-no-properties (point-min) (point-max))))
	  (mixi-retrieve-1 ret url post-data))))))

(defun mixi-curl-retrieve (url &optional post-data)
  "Retrieve the URL and return gotten strings."
  (with-temp-buffer
    (if (fboundp 'set-buffer-multibyte)
	(set-buffer-multibyte nil))
    (let ((orig-mode (default-file-modes))
	  (coding-system-for-read 'binary)
	  (coding-system-for-write 'binary)
	  process ret)
      (unwind-protect
	  (progn
	    (set-default-file-modes 448)
	    (setq process
		  (apply #'start-process "curl" (current-buffer)
			 mixi-curl-program
			 (append (if post-data '("-d" "@-"))
				 (list "-i" "-L" "-s"
				       "-b" mixi-curl-cookie-file
				       "-c" mixi-curl-cookie-file
				       (concat mixi-url url)))))
	    (set-process-sentinel process #'ignore))
	(set-default-file-modes orig-mode))
      (when post-data
	(process-send-string process (concat post-data "\n"))
	(process-send-eof process))
      (while (eq (process-status process) 'run)
	(accept-process-output process 1))
      (goto-char (point-min))
      (while (looking-at "HTTP/[0-9]+\\.[0-9]+ [13][0-9][0-9]")
	(delete-region (point) (re-search-forward "\r?\n\r?\n")))
      (unless (looking-at "HTTP/[0-9]+\\.[0-9]+ 200")
	(error (mixi-message "Cannot retrieve")))
      (delete-region (point) (re-search-forward "\r?\n\r?\n"))
      (setq ret (decode-coding-string (buffer-string) mixi-coding-system))
      (mixi-retrieve-1 ret url post-data))))

(defconst mixi-my-id-regexp
  "<a href=\"add_diary\\.pl\\?id=\\([0-9]+\\)")

(defun mixi-login (&optional email password)
  "Login to mixi."
  (when (and (eq mixi-retrieve-function 'mixi-w3m-retrieve)
	     (not w3m-use-cookies))
    (error
     (mixi-message
      "Require to accept cookies.  Please set `w3m-use-cookies' to t.")))
  (let ((email (or email mixi-default-email
		   (read-from-minibuffer (mixi-message "Login Email: "))))
	(password (or password mixi-default-password
		      (read-passwd (mixi-message "Login Password: ")))))
    (let ((buffer (funcall mixi-retrieve-function "/login.pl"
			   (concat "email=" email
				   "&password=" password
				   "&next_url=/home.pl"
				   "&sticky=on"))))
      (unless (string-match "url=/check\\.pl\\?n=" buffer)
	(error (mixi-message "Cannot login")))
      (setq buffer (funcall mixi-retrieve-function "/check.pl?n=home.pl"))
      (if (string-match mixi-my-id-regexp buffer)
	  (setq mixi-me (mixi-make-friend (match-string 1 buffer)))
	(error (mixi-message "Cannot login"))))))

(defun mixi-logout ()
  (funcall mixi-retrieve-function "/logout.pl"))

(defmacro with-mixi-retrieve (url &rest body)
  `(let (buffer)
     (when ,url
       (setq buffer (funcall mixi-retrieve-function ,url))
       (when (string-match "login.pl" buffer)
	 (mixi-login)
	 (setq buffer (funcall mixi-retrieve-function ,url))))
     ,@body))
(put 'with-mixi-retrieve 'lisp-indent-function 'defun)
(put 'with-mixi-retrieve 'edebug-form-spec '(form body))

(defun mixi-get-matched-items (url max-numbers regexp)
  "Get matched items to REGEXP in URL."
  (let ((page 1)
	ids)
    (catch 'end
      (while (or (null max-numbers) (< (length ids) max-numbers))
	(with-mixi-retrieve (format url page)
	  (let ((pos 0))
	    (while (and (string-match regexp buffer pos)
			(or (null max-numbers) (< (length ids) max-numbers)))
	      (let ((num 1)
		    list)
		(while (match-string num buffer)
		  (setq list (cons (match-string num buffer) list))
		  (incf num))
		(when (member (reverse list) ids)
		  (throw 'end ids))
		(setq ids (cons (reverse list) ids))
		(setq pos (match-end (1- num)))))
	    (when (eq pos 0)
	      (throw 'end ids))))
	(incf page)))
    ;; FIXME: Sort? Now order by newest.
    (reverse ids)))

;; stolen (and modified) from shimbun.el
(defun mixi-remove-markup (string)
  "Remove markups from STRING."
  (with-temp-buffer
    (insert string)
    (save-excursion
      (goto-char (point-min))
      (while (search-forward "<!--" nil t)
	(delete-region (match-beginning 0)
		       (or (search-forward "-->" nil t)
			   (point-max))))
      (goto-char (point-min))
      (while (re-search-forward "<[^>]+>" nil t)
	(replace-match "" t t))
      (goto-char (point-min))
      (while (re-search-forward "
" nil t)
	(replace-match "\n" t t)))
    (buffer-string)))

;; Cache.
;; stolen from time-date.el
(defun mixi-time-less-p (t1 t2)
  "Say whether time value T1 is less than time value T2."
  (unless (numberp (cdr t1))
    (setq t1 (cons (car t1) (cdr t1))))
  (unless (numberp (cdr t2))
    (setq t2 (cons (car t2) (cdr t2))))
  (or (< (car t1) (car t2))
      (and (= (car t1) (car t2))
	   (< (nth 1 t1) (nth 1 t2)))))

(defun mixi-time-add (t1 t2)
  "Add two time values.  One should represent a time difference."
  (unless (numberp (cdr t1))
    (setq t1 (cons (car t1) (cdr t1))))
  (unless (numberp (cdr t2))
    (setq t2 (cons (car t2) (cdr t2))))
  (let ((low (+ (cdr t1) (cdr t2))))
    (cons (+ (car t1) (car t2) (lsh low -16)) low)))

;; stolen from time-date.el
(defun mixi-seconds-to-time (seconds)
  "Convert SECONDS (a floating point number) to a time value."
  (cons (floor seconds 65536)
	(floor (mod seconds 65536))))

(defun mixi-cache-expired-p (object)
  "Whether a cache of OBJECT is expired."
  (let ((timestamp (mixi-object-timestamp object)))
    (unless (or (null mixi-cache-expires)
		 (null timestamp))
      (mixi-time-less-p
       (mixi-time-add timestamp (mixi-seconds-to-time mixi-cache-expires))
       (current-time)))))

(defun mixi-make-cache (key value table)
  "Make a cache object and return it."
  (let ((cache (gethash key table)))
    (if (and cache (not (mixi-cache-expired-p cache)))
	cache
      (puthash key value table))))

;; Object.
(defconst mixi-object-prefix "mixi-")

(defmacro mixi-object-class (object)
  `(car-safe ,object))

(defmacro mixi-object-p (object)
  `(eq (string-match (concat "^" mixi-object-prefix)
		     (symbol-name (mixi-object-class ,object))) 0))

(defun mixi-object-name (object)
  "Return the name of OBJECT."
  (unless (mixi-object-p object)
    (signal 'wrong-type-argument (list 'mixi-object-p object)))
  (let ((class (mixi-object-class object)))
    (substring (symbol-name class) (length mixi-object-prefix))))

(defun mixi-object-timestamp (object)
  "Return the timestamp of OJBECT."
  (unless (mixi-object-p object)
    (signal 'wrong-type-argument (list 'mixi-object-p object)))
  (aref (cdr object) 0))
(defalias 'mixi-object-realize-p 'mixi-object-timestamp)

(defun mixi-object-id (object)
  "Return the id of OBJECT."
  (unless (mixi-object-p object)
    (signal 'wrong-type-argument (list 'mixi-object-p object)))
  (let ((func (intern (concat mixi-object-prefix
			      (mixi-object-name object) "-id"))))
    (funcall func object)))

(defun mixi-object-set-timestamp (object timestamp)
  "Set the timestamp of OBJECT."
  (unless (mixi-object-p object)
    (signal 'wrong-type-argument (list 'mixi-object-p object)))
  (aset (cdr object) 0 timestamp))

(defmacro mixi-object-touch (object)
  `(mixi-object-set-timestamp ,object (current-time)))

;; Friend object.
(defvar mixi-friend-cache (make-hash-table :test 'equal))
(defun mixi-make-friend (id &optional nick)
  "Return a friend object."
  (mixi-make-cache id (cons 'mixi-friend (vector nil id nick nil nil nil nil
						 nil nil nil nil nil nil nil))
		   mixi-friend-cache))

(defun mixi-make-me ()
  (unless mixi-me
    (with-mixi-retrieve "/home.pl"
      (if (string-match mixi-my-id-regexp buffer)
	  (setq mixi-me (mixi-make-friend (match-string 1 buffer)))
	(signal 'error (list 'who-am-i)))))
  mixi-me)

(defmacro mixi-friend-p (friend)
  `(eq (mixi-object-class ,friend) 'mixi-friend))

(defmacro mixi-friend-page (friend)
  `(concat "/show_friend.pl?id=" (mixi-friend-id ,friend)))

(defconst mixi-friend-nick-regexp
  "<img alt=\"\\*\" src=\"http://img\\.mixi\\.jp/img/dot0\\.gif\" width=\"1\" height=\"5\"><br>\n\\(.*\\)さん([0-9]+)")
(defconst mixi-friend-name-sex-regexp
  "<td BGCOLOR=#F2DDB7 WIDTH=80 NOWRAP><font COLOR=#996600>名\\(&nbsp;\\| \\)前</font></td>\n+<td WIDTH=345>\\([^<]+\\) (\\([男女]\\)性)</td>")
(defconst mixi-friend-address-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>現住所</font></td>\n<td>\\(.+\\)\\(\n.+\n\\)?</td></tr>")
(defconst mixi-friend-age-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>年\\(&nbsp;\\| \\)齢</font></td>\n<td>\\([0-9]+\\)歳\\(\n.+\n\\)?</td></tr>")
(defconst mixi-friend-birthday-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>誕生日</font></td>\n<td>\\([0-9]+\\)月\\([0-9]+\\)日\\(\n.+\n\\)?</td></tr>")
(defconst mixi-friend-blood-type-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>血液型</font></td>\n<td>\\([ABO]B?\\)型\\(\n\n\\)?</td></tr>")
(defconst mixi-friend-birthplace-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>出身地</font>\n?</td>\n<td>\\(.+\\)\\(\n.+\n\\)?</td></tr>")
(defconst mixi-friend-hobby-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>趣\\(&nbsp;\\| \\)味</font></td>\n<td>\\(.+\\)</td></tr>")
(defconst mixi-friend-job-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>職\\(&nbsp;\\| \\)業</font></td>\n<td>\\(.+\\)\\(\n.+\n\\)?</td></tr>")
(defconst mixi-friend-organization-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>所\\(&nbsp;\\| \\)属</font></td>\n<td[^>]*>\\(.+\\)\\(\n.+\n\\)?</td></tr>")
(defconst mixi-friend-profile-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>自己紹介</font></td>\n<td CLASS=h120>\\(.+\\)</td></tr>")

(defun mixi-friend-realize (friend)
  "Realize a FRIEND."
  ;; FIXME: Check a expiration of cache?
  (unless (mixi-object-realize-p friend)
    (let (buf)
      (with-mixi-retrieve (mixi-friend-page friend)
	(setq buf buffer))
      (if (string-match mixi-friend-nick-regexp buf)
	  (mixi-friend-set-nick friend (match-string 1 buf))
	(signal 'error (list 'cannot-find-nick friend)))
      ;; For getting my profile.
      (unless (string-match mixi-friend-name-sex-regexp buf)
	(with-mixi-retrieve "/show_profile.pl"
	  (setq buf buffer)))
      (if (string-match mixi-friend-name-sex-regexp buf)
	  (progn
	    (mixi-friend-set-name friend (match-string 2 buf))
	    (mixi-friend-set-sex friend
				 (if (string= (match-string 3 buf) "男")
				     'male 'female)))
	(signal 'error (list 'cannot-find-name-or-sex friend)))
      (when (string-match mixi-friend-address-regexp buf)
	(mixi-friend-set-address friend (match-string 1 buf)))
      (when (string-match mixi-friend-age-regexp buf)
	(mixi-friend-set-age
	 friend (string-to-number (match-string 2 buf))))
      (when (string-match mixi-friend-birthday-regexp buf)
	(mixi-friend-set-birthday
	 friend (list (string-to-number (match-string 1 buf))
		      (string-to-number (match-string 2 buf)))))
      (when (string-match mixi-friend-blood-type-regexp buf)
	(mixi-friend-set-blood-type friend (intern (match-string 1 buf))))
      (when (string-match mixi-friend-birthplace-regexp buf)
	(mixi-friend-set-birthplace friend (match-string 1 buf)))
      (when (string-match mixi-friend-hobby-regexp buf)
	(mixi-friend-set-hobby
	 friend (split-string (match-string 2 buf) ", ")))
      (when (string-match mixi-friend-job-regexp buf)
	(mixi-friend-set-job friend (match-string 2 buf)))
      (when (string-match mixi-friend-organization-regexp buf)
	(mixi-friend-set-organization friend (match-string 2 buf)))
      (when (string-match mixi-friend-profile-regexp buf)
	(mixi-friend-set-profile
	 friend (mixi-remove-markup (match-string 1 buf)))))
    (mixi-object-touch friend)))

(defun mixi-friend-id (friend)
  "Return the id of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aref (cdr friend) 1))

(defun mixi-friend-nick (friend)
  "Return the nick of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (unless (aref (cdr friend) 2)
    (mixi-friend-realize friend))
  (aref (cdr friend) 2))

(defun mixi-friend-name (friend)
  "Return the name of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 3))

(defun mixi-friend-sex (friend)
  "Return the sex of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 4))

(defun mixi-friend-address (friend)
  "Return the address of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 5))

(defun mixi-friend-age (friend)
  "Return the age of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 6))

(defun mixi-friend-birthday (friend)
  "Return the birthday of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 7))

(defun mixi-friend-blood-type (friend)
  "Return the blood type of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 8))

(defun mixi-friend-birthplace (friend)
  "Return the birthplace of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 9))

(defun mixi-friend-hobby (friend)
  "Return the hobby of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 10))

(defun mixi-friend-job (friend)
  "Return the job of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 11))

(defun mixi-friend-organization (friend)
  "Return the organization of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 12))

(defun mixi-friend-profile (friend)
  "Return the pforile of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (mixi-friend-realize friend)
  (aref (cdr friend) 13))

(defun mixi-friend-set-nick (friend nick)
  "Set the nick of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 2 nick))

(defun mixi-friend-set-name (friend name)
  "Set the name of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 3 name))

(defun mixi-friend-set-sex (friend sex)
  "Set the sex of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 4 sex))

(defun mixi-friend-set-address (friend address)
  "Set the address of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 5 address))

(defun mixi-friend-set-age (friend age)
  "Set the age of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 6 age))

(defun mixi-friend-set-birthday (friend birthday)
  "Set the birthday of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 7 birthday))

(defun mixi-friend-set-blood-type (friend blood-type)
  "Set the blood type of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 8 blood-type))

(defun mixi-friend-set-birthplace (friend birthplace)
  "Set the birthplace of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 9 birthplace))

(defun mixi-friend-set-hobby (friend hobby)
  "Set the hobby of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 10 hobby))

(defun mixi-friend-set-job (friend job)
  "Set the job of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 11 job))

(defun mixi-friend-set-organization (friend organization)
  "Set the organization of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 12 organization))

(defun mixi-friend-set-profile (friend profile)
  "Set the profile of FRIEND."
  (unless (mixi-friend-p friend)
    (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
  (aset (cdr friend) 13 profile))

(defmacro mixi-friend-list-page (&optional friend)
  `(concat "/list_friend.pl?page=%d"
	   (when ,friend (concat "&id=" (mixi-friend-id ,friend)))))

(defconst mixi-friend-list-id-regexp
  "<a href=show_friend\\.pl\\?id=\\([0-9]+\\)")
(defconst mixi-friend-list-nick-regexp
  "<td valign=middle>\\(.+\\)さん([0-9]+)<br />")

(defun mixi-get-friends (&rest args)
  "Get friends of FRIEND."
  (when (> (length args) 2)
    (signal 'wrong-number-of-arguments (list 'mixi-get-friends (length args))))
  (let ((friend (nth 0 args))
	(max-numbers (nth 1 args)))
    (when (or (not (mixi-friend-p friend)) (mixi-friend-p max-numbers))
      (setq friend (nth 1 args))
      (setq max-numbers (nth 0 args)))
    (unless (or (null friend) (mixi-friend-p friend))
      (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
    (let ((ids (mixi-get-matched-items (mixi-friend-list-page friend)
				       max-numbers
				       mixi-friend-list-id-regexp))
	  (nicks (mixi-get-matched-items (mixi-friend-list-page friend)
					 max-numbers
					 mixi-friend-list-nick-regexp)))
      (let ((index 0)
	    ret)
	(while (< index (length ids))
	  (setq ret (cons (mixi-make-friend (nth 0 (nth index ids))
					    (nth 0 (nth index nicks))) ret))
	  (incf index))
	(reverse ret)))))

;; Favorite.
(defmacro mixi-favorite-list-page ()
  `(concat "/list_bookmark.pl?page=%d"))

(defconst mixi-favorite-list-id-regexp
  "<td ALIGN=center BGCOLOR=#FDF9F2 width=330><a href=\"show_friend\\.pl\\?id=\\([0-9]+\\)\">")
(defconst mixi-favorite-list-nick-regexp
  "<td BGCOLOR=#FDF9F2><font COLOR=#996600>名&nbsp;&nbsp;前</font></td>
<td COLSPAN=2 BGCOLOR=#FFFFFF>\\(.+\\)</td></tr>")

(defun mixi-get-favorites (&optional max-numbers)
  "Get favorites."
  (let ((ids (mixi-get-matched-items (mixi-favorite-list-page)
				     max-numbers
				     mixi-favorite-list-id-regexp))
	(nicks (mixi-get-matched-items (mixi-favorite-list-page)
				       max-numbers
				       mixi-favorite-list-nick-regexp)))
    (let ((index 0)
	  ret)
      (while (< index (length ids))
	(setq ret (cons (mixi-make-friend (nth 0 (nth index ids))
					  (nth 0 (nth index nicks))) ret))
	(incf index))
      (reverse ret))))

;; Log object.
(defun mixi-make-log (friend time)
  "Return a log object."
  (cons 'mixi-log (vector friend time)))

(defmacro mixi-log-p (log)
  `(eq (mixi-object-class ,log) 'mixi-log))

(defun mixi-log-friend (log)
  "Return the friend of LOG."
  (unless (mixi-log-p log)
    (signal 'wrong-type-argument (list 'mixi-log-p log)))
  (aref (cdr log) 0))

(defun mixi-log-time (log)
  "Return the time of LOG."
  (unless (mixi-log-p log)
    (signal 'wrong-type-argument (list 'mixi-log-p log)))
  (aref (cdr log) 1))

(defmacro mixi-log-list-page ()
  `(concat "/show_log.pl"))

(defconst mixi-log-list-regexp
  "\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日 \\([0-9]+\\):\\([0-9]+\\) <a href=\"show_friend\\.pl\\?id=\\([0-9]+\\)\">\\(.+\\)</a><br>")

(defun mixi-get-logs (&optional max-numbers)
  "Get logs."
  (let ((items (mixi-get-matched-items (mixi-log-list-page)
				       max-numbers
				       mixi-log-list-regexp)))
    (mapcar (lambda (item)
	      (mixi-make-log (mixi-make-friend (nth 5 item) (nth 6 item))
			     (encode-time 0
					  (string-to-number (nth 4 item))
					  (string-to-number (nth 3 item))
					  (string-to-number (nth 2 item))
					  (string-to-number (nth 1 item))
					  (string-to-number (nth 0 item)))))
	    items)))

;; Diary object.
(defvar mixi-diary-cache (make-hash-table :test 'equal))
(defun mixi-make-diary (owner id)
  "Return a diary object."
  (let ((owner (or owner (mixi-make-me))))
    (mixi-make-cache (list (mixi-friend-id owner) id)
		     (cons 'mixi-diary (vector nil owner id nil nil nil))
		     mixi-diary-cache)))

(defmacro mixi-diary-p (diary)
  `(eq (mixi-object-class ,diary) 'mixi-diary))

(defmacro mixi-diary-page (diary)
  `(concat "/view_diary.pl?id=" (mixi-diary-id ,diary)
	   "&owner_id=" (mixi-friend-id (mixi-diary-owner ,diary))))

;; FIXME: Remove `さん'.
(defconst mixi-diary-owner-nick-regexp
  "<td WIDTH=490 background=http://img\\.mixi\\.jp/img/bg_w\\.gif><b><font COLOR=#605048>\\(.+\\)\\(さん\\)?の日記</font></b></td>")
(defconst mixi-diary-time-regexp
  "<td ALIGN=center ROWSPAN=2 NOWRAP WIDTH=95 bgcolor=#FFD8B0>\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日<br>\\([0-9]+\\):\\([0-9]+\\)</td>")
(defconst mixi-diary-title-regexp
  "<td BGCOLOR=#FFF4E0 WIDTH=430>&nbsp;\\([^<]+\\)</td></tr>")
(defconst mixi-diary-content-regexp
  "<td CLASS=h12>\\(.+\\)</td></tr>")

(defun mixi-diary-realize (diary)
  "Realize a DIARY."
  ;; FIXME: Check a expiration of cache?
  (unless (mixi-object-realize-p diary)
    (with-mixi-retrieve (mixi-diary-page diary)
      (if (string-match mixi-diary-owner-nick-regexp buffer)
	  (mixi-friend-set-nick (mixi-diary-owner diary)
				(match-string 1 buffer))
	(signal 'error (list 'cannot-find-owner-nick diary)))
      (if (string-match mixi-diary-time-regexp buffer)
	  (mixi-diary-set-time
	   diary (encode-time 0 (string-to-number (match-string 5 buffer))
			      (string-to-number (match-string 4 buffer))
			      (string-to-number (match-string 3 buffer))
			      (string-to-number (match-string 2 buffer))
			      (string-to-number (match-string 1 buffer))))
	(signal 'error (list 'cannot-find-time diary)))
      (if (string-match mixi-diary-title-regexp buffer)
	  (mixi-diary-set-title diary (match-string 1 buffer))
	(signal 'error (list 'cannot-find-title diary)))
      (if (string-match mixi-diary-content-regexp buffer)
	  (mixi-diary-set-content diary (mixi-remove-markup
					 (match-string 1 buffer)))
	(signal 'error (list 'cannot-find-content diary))))
    (mixi-object-touch diary)))

(defun mixi-diary-owner (diary)
  "Return the owner of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (aref (cdr diary) 1))

(defun mixi-diary-id (diary)
  "Return the id of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (aref (cdr diary) 2))

(defun mixi-diary-time (diary)
  "Return the time of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (mixi-diary-realize diary)
  (aref (cdr diary) 3))

(defun mixi-diary-title (diary)
  "Return the title of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (mixi-diary-realize diary)
  (aref (cdr diary) 4))

(defun mixi-diary-content (diary)
  "Return the content of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (mixi-diary-realize diary)
  (aref (cdr diary) 5))

(defun mixi-diary-set-time (diary time)
  "Set the time of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (aset (cdr diary) 3 time))

(defun mixi-diary-set-title (diary title)
  "Set the title of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (aset (cdr diary) 4 title))

(defun mixi-diary-set-content (diary content)
  "Set the content of DIARY."
  (unless (mixi-diary-p diary)
    (signal 'wrong-type-argument (list 'mixi-diary-p diary)))
  (aset (cdr diary) 5 content))

(defmacro mixi-diary-list-page (&optional friend)
  `(concat "/list_diary.pl?page=%d"
	   (when ,friend (concat "&id=" (mixi-friend-id ,friend)))))

(defconst mixi-diary-list-regexp
  "<a href=\"view_diary\\.pl\\?id=\\([0-9]+\\)&owner_id=[0-9]+\">")

(defun mixi-get-diaries (&rest args)
  "Get diaries of FRIEND."
  (when (> (length args) 2)
    (signal 'wrong-number-of-arguments (list 'mixi-get-friends (length args))))
  (let ((friend (nth 0 args))
	(max-numbers (nth 1 args)))
    (when (or (not (mixi-friend-p friend)) (mixi-friend-p max-numbers))
      (setq friend (nth 1 args))
      (setq max-numbers (nth 0 args)))
    (unless (or (null friend) (mixi-friend-p friend))
      (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
    (let ((items (mixi-get-matched-items (mixi-diary-list-page friend)
					 max-numbers
					 mixi-diary-list-regexp)))
      (mapcar (lambda (item)
		(mixi-make-diary friend (nth 0 item)))
	      items))))

(defmacro mixi-new-diary-list-page ()
  `(concat "/new_friend_diary.pl?page=%d"))

(defconst mixi-new-diary-list-regexp
  "<a class=\"new_link\" href=view_diary\\.pl\\?id=\\([0-9]+\\)&owner_id=\\([0-9]+\\)>")

(defun mixi-get-new-diaries (&optional max-numbers)
  "Get new diaries."
  (let ((items (mixi-get-matched-items (mixi-new-diary-list-page)
				       max-numbers
				       mixi-new-diary-list-regexp)))
    (mapcar (lambda (item)
	      (mixi-make-diary (mixi-make-friend (nth 1 item)) (nth 0 item)))
	    items)))

;; Community object.
(defvar mixi-community-cache (make-hash-table :test 'equal))
(defun mixi-make-community (id &optional name)
  "Return a community object."
  (mixi-make-cache id (cons 'mixi-community (vector nil id name nil nil nil
						    nil nil nil nil))
		   mixi-community-cache))

(defmacro mixi-community-p (community)
  `(eq (mixi-object-class ,community) 'mixi-community))

(defmacro mixi-community-page (community)
  `(concat "/view_community.pl?id=" (mixi-community-id ,community)))

(defconst mixi-community-nodata-regexp
  "^データがありません")
(defconst mixi-community-name-regexp
  "<td WIDTH=345>\\(.*\\)</td></tr>")
(defconst mixi-community-birthday-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>開設日</font></td>\n<td>\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日</td>")
;; FIXME: Care when the owner has seceded.
(defconst mixi-community-owner-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>管理人</font></td>\n<td>\n\n<a href=\"\\(home\\.pl\\|show_friend\\.pl\\?id=\\([0-9]+\\)\\)\">\n\\(.+\\)</a>")
(defconst mixi-community-category-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>カテゴリ</font></td>\n<td>\\([^<]+\\)</td>")
(defconst mixi-community-members-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>メンバー数</font></td>\n<td>\\([0-9]+\\)人</td></tr>")
(defconst mixi-community-open-level-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>参加条件と<br>公開レベル</font></td>
<td>\\(.+\\)</td></tr>")
(defconst mixi-community-authority-regexp
  "<td BGCOLOR=#F2DDB7><font COLOR=#996600>トピック作成の権限</font></td>\n<td>\\(.+\\)</td></tr>")
(defconst mixi-community-description-regexp
  "<td CLASS=h120>\\(.+\\)</td>")

(defun mixi-community-realize (community)
  "Realize a COMMUNITY."
  ;; FIXME: Check a expiration of cache?
  (unless (mixi-object-realize-p community)
    (with-mixi-retrieve (mixi-community-page community)
      (if (string-match mixi-community-nodata-regexp buffer)
	  ;; FIXME: Set all members?
	  (mixi-community-set-name community "データがありません")
	(if (string-match mixi-community-name-regexp buffer)
	    (mixi-community-set-name community (match-string 1 buffer))
	  (signal 'error (list 'cannot-find-name community)))
	(if (string-match mixi-community-birthday-regexp buffer)
	    (mixi-community-set-birthday
	     community
	     (encode-time 0 0 0 (string-to-number (match-string 3 buffer))
			  (string-to-number (match-string 2 buffer))
			  (string-to-number (match-string 1 buffer))))
	  (signal 'error (list 'cannot-find-birthday community)))
	(if (string-match mixi-community-owner-regexp buffer)
	    (if (string= (match-string 1 buffer) "home.pl")
		(mixi-community-set-owner community (mixi-make-me))
	      (mixi-community-set-owner
	       community (mixi-make-friend (match-string 2 buffer)
					   (match-string 3 buffer))))
	  (signal 'error (list 'cannot-find-owner community)))
	(if (string-match mixi-community-category-regexp buffer)
	    (mixi-community-set-category community (match-string 1 buffer))
	  (signal 'error (list 'cannot-find-category community)))
	(if (string-match mixi-community-members-regexp buffer)
	    (mixi-community-set-members
	     community (string-to-number (match-string 1 buffer)))
	  (signal 'error (list 'cannot-find-members community)))
	(if (string-match mixi-community-open-level-regexp buffer)
	    (mixi-community-set-open-level community (match-string 1 buffer))
	  (signal 'error (list 'cannot-find-open-level community)))
	(if (string-match mixi-community-authority-regexp buffer)
	    (mixi-community-set-authority community (match-string 1 buffer))
	  (signal 'error (list 'cannot-find-authority community)))
	(if (string-match mixi-community-description-regexp buffer)
	    (mixi-community-set-description
	     community (mixi-remove-markup (match-string 1 buffer)))
	  (signal 'error (list 'cannot-find-description community)))))
    (mixi-object-touch community)))

(defun mixi-community-id (community)
  "Return the id of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aref (cdr community) 1))

(defun mixi-community-name (community)
  "Return the name of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (unless (aref (cdr community) 2)
    (mixi-community-realize community))
  (aref (cdr community) 2))

(defun mixi-community-birthday (community)
  "Return the birthday of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 3))

(defun mixi-community-owner (community)
  "Return the owner of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 4))

(defun mixi-community-category (community)
  "Return the category of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 5))

(defun mixi-community-members (community)
  "Return the members of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 6))

(defun mixi-community-open-level (community)
  "Return the open-level of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 7))

(defun mixi-community-authority (community)
  "Return the authority of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 8))

(defun mixi-community-description (community)
  "Return the description of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (mixi-community-realize community)
  (aref (cdr community) 9))

(defun mixi-community-set-name (community name)
  "Set the name of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 2 name))

(defun mixi-community-set-birthday (community birthday)
  "Set the birthday of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 3 birthday))

(defun mixi-community-set-owner (community owner)
  "Set the owner of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (unless (mixi-friend-p owner)
    (signal 'wrong-type-argument (list 'mixi-friend-p owner)))
  (aset (cdr community) 4 owner))

(defun mixi-community-set-category (community category)
  "Set the category of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 5 category))

(defun mixi-community-set-members (community members)
  "Set the name of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 6 members))

(defun mixi-community-set-open-level (community open-level)
  "Set the name of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 7 open-level))

(defun mixi-community-set-authority (community authority)
  "Set the name of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 8 authority))

(defun mixi-community-set-description (community description)
  "Set the name of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (aset (cdr community) 9 description))

(defmacro mixi-community-list-page (&optional friend)
  `(concat "/list_community.pl?page=%d"
	   (when ,friend (concat "&id=" (mixi-friend-id ,friend)))))

(defconst mixi-community-list-id-regexp
  "<a href=view_community\\.pl\\?id=\\([0-9]+\\)")
(defconst mixi-community-list-name-regexp
  "<td valign=middle>\\(.+\\)([0-9]+)</td>")

(defun mixi-get-communities (&rest args)
  "Get communities of FRIEND."
  (when (> (length args) 2)
    (signal 'wrong-number-of-arguments (list 'mixi-get-friends (length args))))
  (let ((friend (nth 0 args))
	(max-numbers (nth 1 args)))
    (when (or (not (mixi-friend-p friend)) (mixi-friend-p max-numbers))
      (setq friend (nth 1 args))
      (setq max-numbers (nth 0 args)))
    (unless (or (null friend) (mixi-friend-p friend))
      (signal 'wrong-type-argument (list 'mixi-friend-p friend)))
    (let ((ids (mixi-get-matched-items (mixi-community-list-page friend)
				       max-numbers
				       mixi-community-list-id-regexp))
	  (names (mixi-get-matched-items (mixi-community-list-page friend)
					 max-numbers
					 mixi-community-list-name-regexp)))
      (let ((index 0)
	    ret)
	(while (< index (length ids))
	  (setq ret (cons (mixi-make-community (nth 0 (nth index ids))
					       (nth 0 (nth index names))) ret))
	  (incf index))
	(reverse ret)))))

;; Topic object.
(defvar mixi-topic-cache (make-hash-table :test 'equal))
(defun mixi-make-topic (community id)
  "Return a topic object."
  (mixi-make-cache (list (mixi-community-id community) id)
		   (cons 'mixi-topic (vector nil community id nil nil nil nil))
		   mixi-topic-cache))

(defmacro mixi-topic-p (topic)
  `(eq (mixi-object-class ,topic) 'mixi-topic))

(defmacro mixi-topic-page (topic)
  `(concat "/view_bbs.pl?id=" (mixi-topic-id ,topic)
	   "&comm_id=" (mixi-community-id (mixi-topic-community ,topic))))

(defconst mixi-topic-time-regexp
  "<td rowspan=\"3\" width=\"110\" bgcolor=\"#ffd8b0\" align=\"center\" valign=\"top\" nowrap>\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日<br>\\([0-9]+\\):\\([0-9]+\\)</td>")
(defconst mixi-topic-title-regexp
  "<td bgcolor=\"#fff4e0\">&nbsp;\\([^<]+\\)</td>")
;; FIXME: Remove `さん'.
(defconst mixi-topic-owner-regexp
  "<td bgcolor=\"#fdf9f2\">&nbsp;<font color=\"#dfb479\"></font>&nbsp;<a href=\"show_friend\\.pl\\?id=\\([0-9]+\\)\">\\(.+\\)\\(さん\\)?</a>")
(defconst mixi-topic-content-regexp
  "<td class=\"h120\"><table><tr>\\(.+\\)?</tr></table>\\(.+\\)</td>")

(defun mixi-topic-realize (topic)
  "Realize a TOPIC."
  ;; FIXME: Check a expiration of cache?
  (unless (mixi-object-realize-p topic)
    (with-mixi-retrieve (mixi-topic-page topic)
      (if (string-match mixi-topic-time-regexp buffer)
	  (mixi-topic-set-time
	   topic (encode-time 0 (string-to-number (match-string 5 buffer))
			      (string-to-number (match-string 4 buffer))
			      (string-to-number (match-string 3 buffer))
			      (string-to-number (match-string 2 buffer))
			      (string-to-number (match-string 1 buffer))))
	(signal 'error (list 'cannot-find-time topic)))
      (if (string-match mixi-topic-title-regexp buffer)
	  (mixi-topic-set-title topic (match-string 1 buffer))
	(signal 'error (list 'cannot-find-title topic)))
      (if (string-match mixi-topic-owner-regexp buffer)
	  (mixi-topic-set-owner topic
				(mixi-make-friend (match-string 1 buffer)
						  (match-string 2 buffer)))
	(signal 'error (list 'cannot-find-owner topic)))
      (if (string-match mixi-topic-content-regexp buffer)
	  (mixi-topic-set-content topic (mixi-remove-markup
					 (match-string 2 buffer)))
	(signal 'error (list 'cannot-find-content topic))))
    (mixi-object-touch topic)))

(defun mixi-topic-community (topic)
  "Return the community of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (aref (cdr topic) 1))

(defun mixi-topic-id (topic)
  "Return the id of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (aref (cdr topic) 2))

(defun mixi-topic-time (topic)
  "Return the time of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (mixi-topic-realize topic)
  (aref (cdr topic) 3))

(defun mixi-topic-title (topic)
  "Return the title of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (mixi-topic-realize topic)
  (aref (cdr topic) 4))

(defun mixi-topic-owner (topic)
  "Return the owner of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (mixi-topic-realize topic)
  (aref (cdr topic) 5))

(defun mixi-topic-content (topic)
  "Return the content of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (mixi-topic-realize topic)
  (aref (cdr topic) 6))

(defun mixi-topic-set-time (topic time)
  "Set the time of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (aset (cdr topic) 3 time))

(defun mixi-topic-set-title (topic title)
  "Set the title of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (aset (cdr topic) 4 title))

(defun mixi-topic-set-owner (topic owner)
  "Set the owner of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (unless (mixi-friend-p owner)
    (signal 'wrong-type-argument (list 'mixi-friend-p owner)))
  (aset (cdr topic) 5 owner))

(defun mixi-topic-set-content (topic content)
  "Set the content of TOPIC."
  (unless (mixi-topic-p topic)
    (signal 'wrong-type-argument (list 'mixi-topic-p topic)))
  (aset (cdr topic) 6 content))

(defmacro mixi-topic-list-page (community)
  `(concat "/list_bbs.pl?page=%d"
	   "&id=" (mixi-community-id ,community)))

(defconst mixi-topic-list-regexp
  "<a href=view_bbs\\.pl\\?id=\\([0-9]+\\)")

(defun mixi-get-topics (community &optional max-numbers)
  "Get topics of COMMUNITY."
  (unless (mixi-community-p community)
    (signal 'wrong-type-argument (list 'mixi-community-p community)))
  (let ((items (mixi-get-matched-items (mixi-topic-list-page community)
				       max-numbers
				       mixi-topic-list-regexp)))
    (mapcar (lambda (item)
	      (mixi-make-topic community (nth 0 item)))
	    items)))

(defmacro mixi-new-topic-list-page ()
  `(concat "/new_bbs.pl?page=%d"))

(defconst mixi-new-topic-list-regexp
  "<a href=\"view_bbs\\.pl\\?id=\\([0-9]+\\)&comment_count=[0-9]+&comm_id=\\([0-9]+\\)\" class=\"new_link\">")

(defun mixi-get-new-topics (&optional max-numbers)
  "Get new topics."
  (let ((items (mixi-get-matched-items (mixi-new-topic-list-page)
				       max-numbers
				       mixi-new-topic-list-regexp)))
    (mapcar (lambda (item)
	      (mixi-make-topic (mixi-make-community (nth 1 item))
			       (nth 0 item)))
	    items)))

;; Comment object.
(defun mixi-make-comment (parent owner time content)
  "Return a comment object."
  (cons 'mixi-comment (vector parent owner time content)))

(defmacro mixi-comment-p (comment)
  `(eq (mixi-object-class ,comment) 'mixi-comment))

(defun mixi-comment-parent (comment)
  "Return the parent of COMMENT."
  (unless (mixi-comment-p comment)
    (signal 'wrong-type-argument (list 'mixi-comment-p comment)))
  (aref (cdr comment) 0))

(defun mixi-comment-owner (comment)
  "Return the owner of COMMENT."
  (unless (mixi-comment-p comment)
    (signal 'wrong-type-argument (list 'mixi-comment-p comment)))
  (aref (cdr comment) 1))

(defun mixi-comment-time (comment)
  "Return the time of COMMENT."
  (unless (mixi-comment-p comment)
    (signal 'wrong-type-argument (list 'mixi-comment-p comment)))
  (aref (cdr comment) 2))

(defun mixi-comment-content (comment)
  "Return the content of COMMENT."
  (unless (mixi-comment-p comment)
    (signal 'wrong-type-argument (list 'mixi-comment-p comment)))
  (aref (cdr comment) 3))

(defun mixi-diary-comment-list-page (diary)
  (concat "/view_diary.pl?page=%d"
	  "&id=" (mixi-diary-id diary)
	  "&owner_id=" (mixi-friend-id (mixi-diary-owner diary))))

;; FIXME: Split regexp to time, owner(id and nick) and contents.
(defconst mixi-diary-comment-list-regexp
"<td rowspan=\"2\" align=\"center\" width=\"95\" bgcolor=\"#f2ddb7\" nowrap>
\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日<br>\\([0-9]+\\):\\([0-9]+\\)\\(<br>
<input type=checkbox name=comment_id value=\".+\">
\\|\\)
</td>
<td ALIGN=center BGCOLOR=#FDF9F2 WIDTH=430>
<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"410\">
<tr>
<td>
<a href=\"show_friend\\.pl\\?id=\\([0-9]+\\)\">\\(.+\\)</a>

</td>
</tr>
</table>
</td>
</tr>
<!-- 本文 : start -->
<tr>
<td bgcolor=\"#ffffff\">
<table BORDER=0 CELLSPACING=0 CELLPADDING=[35] WIDTH=410>
<tr>
<td CLASS=h12>
\\(.+\\)
</td></tr></table>")

(defun mixi-topic-comment-list-page (topic)
  (concat "/view_bbs.pl?page=%d"
	  "&id=" (mixi-topic-id topic)
	  "&comm_id=" (mixi-community-id (mixi-topic-community topic))))

;; FIXME: Split regexp to time, owner(id and nick) and contents.
(defconst mixi-topic-comment-list-regexp
  "<tr valign=\"top\">
<td rowspan=\"2\" width=\"110\" bgcolor=\"#f2ddb7\" align=\"center\" nowrap>
\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日<br>
\\([0-9]+\\):\\([0-9]+\\)<br>
\\(</td>\\)
<td bgcolor=\"#fdf9f2\">&nbsp;<font color=\"#f8a448\">
<b>&nbsp;&nbsp;[0-9]+</b>:</font>&nbsp;

<a href=\"show_friend\\.pl\\?id=\\([0-9]+\\)\">\\(.+\\)</a>



</td>
</tr>
<tr>
<td bgcolor=\"#ffffff\" align=\"center\">
<table border=\"0\" cellspacing=\"0\" cellpadding=\"5\" width=\"500\">
<tr>
<td class=\"h120\">

\\(.+\\)
</td>
</tr>
</table>
</td>
</tr>")

(defun mixi-get-comments (parent &optional max-numbers)
  "Get comments of PARENT."
  (unless (mixi-object-p parent)
    (signal 'wrong-type-argument (list 'mixi-object-p parent)))
  (let* ((name (mixi-object-name parent))
	 (list-page (intern (concat mixi-object-prefix name
				    "-comment-list-page")))
	 (regexp (eval (intern (concat mixi-object-prefix name
				       "-comment-list-regexp")))))
    (let ((items (mixi-get-matched-items
		  (funcall list-page parent) max-numbers regexp)))
      (mapcar (lambda (item)
		(mixi-make-comment parent (mixi-make-friend
					   (nth 6 item) (nth 7 item))
				   (encode-time
				    0
				    (string-to-number (nth 4 item))
				    (string-to-number (nth 3 item))
				    (string-to-number (nth 2 item))
				    (string-to-number (nth 1 item))
				    (string-to-number (nth 0 item)))
				   (mixi-remove-markup (nth 8 item))))
	      items))))

(defmacro mixi-new-comment-list-page ()
  `(concat "/new_comment.pl?page=%d"))

(defconst mixi-new-comment-list-regexp
  "<a href=\"view_diary\\.pl\\?id=\\([0-9]+\\)&owner_id=\\([0-9]+\\)&comment_count=[0-9]+\" class=\"new_link\">")

(defun mixi-get-new-comments (&optional max-numbers)
  "Get new comments."
  (let ((items (mixi-get-matched-items (mixi-new-comment-list-page)
				       max-numbers
				       mixi-new-comment-list-regexp)))
    (mapcar (lambda (item)
	      (let ((diary (mixi-make-diary
			    (mixi-make-friend (nth 1 item))
			    (nth 0 item))))
		(mixi-get-comments diary)))
	    items)))

;; Message object.
(defvar mixi-message-cache (make-hash-table :test 'equal))
(defun mixi-make-message (id box)
  "Return a message object."
  (mixi-make-cache (list id box)
		   (cons 'mixi-message (vector nil id box nil nil nil nil))
		   mixi-message-cache))

(defmacro mixi-message-p (message)
  `(eq (mixi-object-class ,message) 'mixi-message))

(defmacro mixi-message-page (message)
  `(concat "/view_message.pl?id=" (mixi-message-id ,message)
	   "&box=" (mixi-message-box ,message)))

(defconst mixi-message-owner-regexp
  "<font COLOR=#996600>差出人</font>&nbsp;:&nbsp;<a HREF=\"show_friend\\.pl\\?id=\\([0-9]+\\)\">\\(.+\\)</a>")
(defconst mixi-message-title-regexp
  "<font COLOR=#996600>件　名</font>&nbsp;:&nbsp;\\(.+\\)
</td>")
(defconst mixi-message-time-regexp
  "<font COLOR=#996600>日　付</font>&nbsp;:&nbsp;\\([0-9]+\\)年\\([0-9]+\\)月\\([0-9]+\\)日 \\([0-9]+\\)時\\([0-9]+\\)分&nbsp;&nbsp;")
(defconst mixi-message-content-regexp
  "<tr><td CLASS=h120>\\(.+\\)</td></tr>")

(defun mixi-message-realize (message)
  "Realize a MESSAGE."
  (unless (mixi-object-realize-p message)
    (with-mixi-retrieve (mixi-message-page message)
      (if (string-match mixi-message-owner-regexp buffer)
	  (mixi-message-set-owner message
				  (mixi-make-friend (match-string 1 buffer)
						    (match-string 2 buffer)))
	(signal 'error (list 'cannot-find-owner message)))
      (if (string-match mixi-message-title-regexp buffer)
	  (mixi-message-set-title message (match-string 1 buffer))
	(signal 'error (list 'cannot-find-title message)))
      (if (string-match mixi-message-time-regexp buffer)
	  (mixi-message-set-time
	   message (encode-time 0 (string-to-number (match-string 5 buffer))
				(string-to-number (match-string 4 buffer))
				(string-to-number (match-string 3 buffer))
				(string-to-number (match-string 2 buffer))
				(string-to-number (match-string 1 buffer))))
	(signal 'error (list 'cannot-find-time message)))
      (if (string-match mixi-message-content-regexp buffer)
	  (mixi-message-set-content message (mixi-remove-markup
					     (match-string 1 buffer)))
	(signal 'error (list 'cannot-find-content message))))
    (mixi-object-touch message)))

(defun mixi-message-id (message)
  "Return the id of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (aref (cdr message) 1))

(defun mixi-message-box (message)
  "Return the box of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (aref (cdr message) 2))

(defun mixi-message-owner (message)
  "Return the owner of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (mixi-message-realize message)
  (aref (cdr message) 3))

(defun mixi-message-title (message)
  "Return the title of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (mixi-message-realize message)
  (aref (cdr message) 4))

(defun mixi-message-time (message)
  "Return the date of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (mixi-message-realize message)
  (aref (cdr message) 5))

(defun mixi-message-content (message)
  "Return the content of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (mixi-message-realize message)
  (aref (cdr message) 6))

(defun mixi-message-set-owner (message owner)
  "Set the owner of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (aset (cdr message) 3 owner))

(defun mixi-message-set-title (message title)
  "Set the title of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (aset (cdr message) 4 title))

(defun mixi-message-set-time (message time)
  "Set the date of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (aset (cdr message) 5 time))

(defun mixi-message-set-content (message content)
  "Set the content of MESSAGE."
  (unless (mixi-message-p message)
    (signal 'wrong-type-argument (list 'mixi-message-p message)))
  (aset (cdr message) 6 content))

(defmacro mixi-message-list-page (&optional box)
  `(concat "/list_message.pl?page=%d"
	   (when ,box (concat "&box=" ,box))))

(defconst mixi-message-list-regexp
  "<td><a HREF=\"view_message\\.pl\\?id=\\(.+\\)&box=\\(.+\\)\">")

(defun mixi-get-messages (&rest args)
  "Get messages."
  (when (> (length args) 2)
    (signal 'wrong-number-of-arguments (list 'mixi-get-messages
					     (length args))))
  (let ((box (nth 0 args))
	(max-numbers (nth 1 args)))
    (when (or (not (stringp box)) (stringp max-numbers))
      (setq box (nth 1 args))
      (setq max-numbers (nth 0 args)))
    (let ((items (mixi-get-matched-items (mixi-message-list-page box)
					 max-numbers
					 mixi-message-list-regexp)))
      (mapcar (lambda (item)
		(mixi-make-message (nth 0 item) (nth 1 item)))
	      items))))

(provide 'mixi)

;;; mixi.el ends here