* elmo-nntp.el (elmo-nntp-folder-list-subfolders): Don't omit
[elisp/wanderlust.git] / elmo / elmo-nntp.el
index c4ed392..6abe77f 100644 (file)
@@ -1,4 +1,4 @@
-;;; elmo-nntp.el -- NNTP Interface for ELMO.
+;;; elmo-nntp.el --- NNTP Interface for ELMO.
 
 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
 ;; Copyright (C) 1998,1999,2000 Masahiro MURATA <muse@ba2.so-net.ne.jp>
 ;;
 
 ;;; Commentary:
-;; 
+;;
 
 ;;; Code:
-;; 
+;;
 
+(require 'elmo-vars)
+(require 'elmo-util)
+(require 'elmo-date)
 (require 'elmo-msgdb)
-(eval-when-compile
-  (require 'elmo-cache)
-  (require 'elmo-util))
+(require 'elmo-cache)
+(require 'elmo)
 (require 'elmo-net)
 
+(defvar elmo-nntp-overview-fetch-chop-length 200
+ "*Number of overviews to fetch in one request in nntp.")
+
+(defvar elmo-nntp-use-cache t
+  "Use cache in nntp folder.")
+
+(defvar elmo-nntp-max-number-precedes-list-active nil
+  "Non-nil means max number of msgdb is set as the max number of `list active'.
+\(Needed for inn 2.3 or later?\).")
+
+(defvar elmo-nntp-group-coding-system nil
+  "A coding system for newsgroup string.")
+
+(defsubst elmo-nntp-encode-group-string (string)
+  (if elmo-nntp-group-coding-system
+      (encode-coding-string string elmo-nntp-group-coding-system)
+    string))
+
+(defsubst elmo-nntp-decode-group-string (string)
+  (if elmo-nntp-group-coding-system
+      (decode-coding-string string elmo-nntp-group-coding-system)
+    string))
+
+;; For debugging.
+(defvar elmo-nntp-debug nil
+  "Non-nil forces NNTP folder as debug mode.
+Debug information is inserted in the buffer \"*NNTP DEBUG*\"")
+
+;;; Debug
+(defsubst elmo-nntp-debug (message &rest args)
+  (if elmo-nntp-debug
+      (let ((biff (string-match "BIFF-" (buffer-name)))
+           pos)
+       (with-current-buffer (get-buffer-create (concat "*NNTP DEBUG*"
+                                                       (if biff "BIFF")))
+         (goto-char (point-max))
+         (setq pos (point))
+         (insert (apply 'format message args) "\n")))))
+
+;;; ELMO NNTP folder
+(eval-and-compile
+  (luna-define-class elmo-nntp-folder (elmo-net-folder)
+                    (group temp-crosses reads))
+  (luna-define-internal-accessors 'elmo-nntp-folder))
+
+(luna-define-method elmo-folder-initialize :around ((folder
+                                                    elmo-nntp-folder)
+                                                   name)
+  (let ((elmo-network-stream-type-alist
+        (if elmo-nntp-stream-type-alist
+            (setq elmo-network-stream-type-alist
+                  (append elmo-nntp-stream-type-alist
+                          elmo-network-stream-type-alist))
+          elmo-network-stream-type-alist))
+       parse)
+    (setq name (luna-call-next-method))
+    (setq parse (elmo-parse-token name ":"))
+    (elmo-nntp-folder-set-group-internal folder
+                                        (elmo-nntp-encode-group-string
+                                         (car parse)))
+    (setq parse (elmo-parse-prefixed-element ?: (cdr parse)))
+    (elmo-net-folder-set-user-internal folder
+                                      (if (eq (length (car parse)) 0)
+                                          elmo-nntp-default-user
+                                        (car parse)))
+    (unless (elmo-net-folder-server-internal folder)
+      (elmo-net-folder-set-server-internal folder
+                                          elmo-nntp-default-server))
+    (unless (elmo-net-folder-port-internal folder)
+      (elmo-net-folder-set-port-internal folder
+                                        elmo-nntp-default-port))
+    (unless (elmo-net-folder-stream-type-internal folder)
+      (elmo-net-folder-set-stream-type-internal
+       folder
+       (elmo-get-network-stream-type
+       elmo-nntp-default-stream-type)))
+    folder))
+
+(luna-define-method elmo-folder-expand-msgdb-path ((folder elmo-nntp-folder))
+  (convert-standard-filename
+   (expand-file-name
+    (elmo-nntp-folder-group-internal folder)
+    (expand-file-name (or (elmo-net-folder-server-internal folder) "nowhere")
+                     (expand-file-name "nntp"
+                                       elmo-msgdb-directory)))))
+
+(luna-define-method elmo-folder-newsgroups ((folder elmo-nntp-folder))
+  (list (elmo-nntp-folder-group-internal folder)))
+
+;;; NNTP Session
 (eval-and-compile
   (luna-define-class elmo-nntp-session (elmo-network-session)
                     (current-group))
 Don't cache if nil.")
 
 (defvar elmo-nntp-list-folders-cache nil)
-(defvar elmo-nntp-groups-hashtb nil)
+
 (defvar elmo-nntp-groups-async nil)
 (defvar elmo-nntp-header-fetch-chop-length 200)
 
@@ -85,7 +177,7 @@ Don't cache if nil.")
                                           (list-active . 2)))
 
 (defmacro elmo-nntp-get-server-command (session)
-  (` (assoc (cons (elmo-network-session-host-internal (, session))
+  (` (assoc (cons (elmo-network-session-server-internal (, session))
                  (elmo-network-session-port-internal (, session)))
            elmo-nntp-server-command-alist)))
 
@@ -97,7 +189,7 @@ Don't cache if nil.")
               (nconc elmo-nntp-server-command-alist
                      (list (cons
                             (cons
-                             (elmo-network-session-host-internal (, session))
+                             (elmo-network-session-server-internal (, session))
                              (elmo-network-session-port-internal (, session)))
                             (setq entry
                                   (vector
@@ -156,43 +248,46 @@ Don't cache if nil.")
   (concat
    (and user (concat ":" user))
    (if (and server
-           (null (string= server elmo-default-nntp-server)))
+           (null (string= server elmo-nntp-default-server)))
        (concat "@" server))
    (if (and port
-           (null (eq port elmo-default-nntp-port)))
+           (null (eq port elmo-nntp-default-port)))
        (concat ":" (if (numberp port)
                       (int-to-string port) port)))
    (unless (eq (elmo-network-stream-type-symbol type)
-              elmo-default-nntp-stream-type)
+              elmo-nntp-default-stream-type)
      (elmo-network-stream-type-spec-string type))))
 
-(defun elmo-nntp-get-session (spec &optional if-exists)
+(defun elmo-nntp-get-session (folder &optional if-exists)
   (elmo-network-get-session
    'elmo-nntp-session
-   "NNTP"
-   (elmo-nntp-spec-hostname spec)
-   (elmo-nntp-spec-port spec)
-   (elmo-nntp-spec-username spec)
-   nil ; auth type
-   (elmo-nntp-spec-stream-type spec)
+   (concat
+    (if (elmo-folder-biff-internal folder)
+       "BIFF-")
+    "NNTP")
+   folder
    if-exists))
 
 (luna-define-method elmo-network-initialize-session ((session
                                                      elmo-nntp-session))
-  (let ((process (elmo-network-session-process-internal session)))
+  (let ((process (elmo-network-session-process-internal session))
+       response)
     (set-process-filter (elmo-network-session-process-internal session)
                        'elmo-nntp-process-filter)
     (with-current-buffer (elmo-network-session-buffer session)
       (setq elmo-nntp-read-point (point-min))
       ;; Skip garbage output from process before greeting.
       (while (and (memq (process-status process) '(open run))
-                  (goto-char (point-max))
-                  (forward-line -1)
-                  (not (looking-at "20[01]")))
-        (accept-process-output process 1))
+                 (goto-char (point-max))
+                 (forward-line -1)
+                 (not (looking-at "^[2-5][0-9][0-9]")))
+       (accept-process-output process 1))
       (setq elmo-nntp-read-point (point))
-      (or (elmo-nntp-read-response session t)
-         (error "Cannot open network"))
+      (setq response (elmo-nntp-read-response session t t))
+      (unless (car response)
+         (signal 'elmo-open-error (list (cdr response))))
+      (if elmo-nntp-send-mode-reader
+         (elmo-nntp-send-mode-reader session))
       (when (eq (elmo-network-stream-type-symbol
                 (elmo-network-session-stream-type-internal session))
                'starttls)
@@ -208,45 +303,49 @@ Don't cache if nil.")
       (elmo-nntp-send-command session
                              (format "authinfo user %s"
                                      (elmo-network-session-user-internal
-                                      session)))
+                                      session))
+                             nil
+                             'no-log)
       (or (elmo-nntp-read-response session)
          (signal 'elmo-authenticate-error '(authinfo)))
       (elmo-nntp-send-command
        session
        (format "authinfo pass %s"
-              (elmo-get-passwd (elmo-network-session-password-key session))))
+              (elmo-get-passwd (elmo-network-session-password-key session)))
+       nil
+       'no-log)
       (or (elmo-nntp-read-response session)
          (signal 'elmo-authenticate-error '(authinfo))))))
 
 (luna-define-method elmo-network-setup-session ((session
                                                 elmo-nntp-session))
-  (if elmo-nntp-send-mode-reader
-      (elmo-nntp-send-mode-reader session))
   (run-hooks 'elmo-nntp-opened-hook))
 
 (defun elmo-nntp-process-filter (process output)
   (save-excursion
     (set-buffer (process-buffer process))
     (goto-char (point-max))
-    (insert output)))
+    (insert output)
+    (elmo-nntp-debug "RECEIVED: %s\n" output)))
 
 (defun elmo-nntp-send-mode-reader (session)
   (elmo-nntp-send-command session "mode reader")
   (if (null (elmo-nntp-read-response session t))
-      (error "Mode reader failed")))
-  
-(defun elmo-nntp-send-command (session command &optional noerase)
+      (message "Mode reader failed")))
+
+(defun elmo-nntp-send-command (session command &optional noerase no-log)
   (with-current-buffer (elmo-network-session-buffer session)
     (unless noerase
       (erase-buffer)
       (goto-char (point-min)))
     (setq elmo-nntp-read-point (point))
+    (elmo-nntp-debug "SEND: %s\n" (if no-log "<NO LOGGING>" command))
     (process-send-string (elmo-network-session-process-internal
                          session) command)
     (process-send-string (elmo-network-session-process-internal
                          session) "\r\n")))
 
-(defun elmo-nntp-read-response (session &optional not-command)
+(defun elmo-nntp-read-response (session &optional not-command error-msg)
   (with-current-buffer (elmo-network-session-buffer session)
     (let ((process (elmo-network-session-process-internal session))
          (case-fold-search nil)
@@ -281,7 +380,9 @@ Don't cache if nil.")
                      (concat response "\n" response-string)
                    response-string)))
          (setq elmo-nntp-read-point match-end)))
-      response)))
+      (if error-msg
+         (cons response response-string)
+       response))))
 
 (defun elmo-nntp-read-raw-response (session)
   (with-current-buffer (elmo-network-session-buffer session)
@@ -314,8 +415,8 @@ Don't cache if nil.")
       (with-current-buffer outbuf
        (erase-buffer)
        (insert-buffer-substring (elmo-network-session-buffer session)
-                                start (- end 3))
-       (elmo-delete-cr-get-content-type)))))
+                                start (- end 3))))
+    t))
 
 (defun elmo-nntp-select-group (session group &optional force)
   (let (response)
@@ -330,7 +431,7 @@ Don't cache if nil.")
                                                      (and response group))
        response))))
 
-(defun elmo-nntp-list-folders-get-cache (folder buf)
+(defun elmo-nntp-list-folders-get-cache (group server buf)
   (when (and elmo-nntp-list-folders-use-cache
             elmo-nntp-list-folders-cache
             (string-match (concat "^"
@@ -338,18 +439,24 @@ Don't cache if nil.")
                                    (or
                                     (nth 1 elmo-nntp-list-folders-cache)
                                     "")))
-                          (or folder "")))
+                          (or group ""))
+            (string-match (concat "^"
+                                  (regexp-quote
+                                   (or
+                                    (nth 2 elmo-nntp-list-folders-cache)
+                                    "")))
+                          (or server "")))
     (let* ((cache-time (car elmo-nntp-list-folders-cache)))
       (unless (elmo-time-expire cache-time
                                elmo-nntp-list-folders-use-cache)
        (save-excursion
          (set-buffer buf)
          (erase-buffer)
-         (insert (nth 2 elmo-nntp-list-folders-cache))
+         (insert (nth 3 elmo-nntp-list-folders-cache))
          (goto-char (point-min))
-         (or (string= folder "")
-             (and folder
-                  (keep-lines (concat "^" (regexp-quote folder) "\\."))))
+         (or (string= group "")
+             (and group
+                  (keep-lines (concat "^" (regexp-quote group) "\\."))))
          t
          )))))
 
@@ -365,31 +472,45 @@ Don't cache if nil.")
         msgdb
         (nconc number-alist (list (cons max-number nil)))))))
 
-(defun elmo-nntp-list-folders (spec &optional hierarchy)
-  (let ((session (elmo-nntp-get-session spec))
-       response ret-val top-ng append-serv use-list-active start)
+(luna-define-method elmo-folder-list-subfolders ((folder elmo-nntp-folder)
+                                                &optional one-level)
+  (elmo-nntp-folder-list-subfolders folder one-level))
+
+(defun elmo-nntp-folder-list-subfolders (folder one-level)
+  (let ((session (elmo-nntp-get-session folder))
+       (case-fold-search nil)
+       response ret-val top-ng username append-serv use-list-active start)
     (with-temp-buffer
-      (if (and (elmo-nntp-spec-group spec)
-              (elmo-nntp-select-group session (elmo-nntp-spec-group spec)))
+      (set-buffer-multibyte nil)
+      (if (and (elmo-nntp-folder-group-internal folder)
+              (elmo-nntp-select-group
+               session
+               (elmo-nntp-folder-group-internal folder)))
          ;; add top newsgroups
-         (setq ret-val (list (elmo-nntp-spec-group spec))))
+         (setq ret-val (list (elmo-nntp-folder-group-internal folder))))
       (unless (setq response (elmo-nntp-list-folders-get-cache
-                             (elmo-nntp-spec-group spec)(current-buffer)))
+                             (elmo-nntp-folder-group-internal folder)
+                             (elmo-net-folder-server-internal folder)
+                             (current-buffer)))
        (when (setq use-list-active (elmo-nntp-list-active-p session))
          (elmo-nntp-send-command
           session
           (concat "list"
-                  (if (and (elmo-nntp-spec-group spec)
-                           (null (string= (elmo-nntp-spec-group spec) "")))
+                  (if (and (elmo-nntp-folder-group-internal folder)
+                           (not (string= (elmo-nntp-folder-group-internal
+                                          folder) "")))
                       (concat " active"
-                              (format " %s.*" (elmo-nntp-spec-group spec)
+                              (format " %s.*"
+                                      (elmo-nntp-folder-group-internal folder)
                                       "")))))
          (if (elmo-nntp-read-response session t)
              (if (null (setq response (elmo-nntp-read-contents session)))
                  (error "NNTP List folders failed")
                (when elmo-nntp-list-folders-use-cache
                  (setq elmo-nntp-list-folders-cache
-                       (list (current-time) (elmo-nntp-spec-group spec)
+                       (list (current-time)
+                             (elmo-nntp-folder-group-internal folder)
+                             (elmo-net-folder-server-internal folder)
                              response)))
                (erase-buffer)
                (insert response))
@@ -402,27 +523,32 @@ Don't cache if nil.")
              (error "NNTP List folders failed"))
          (when elmo-nntp-list-folders-use-cache
            (setq elmo-nntp-list-folders-cache
-                 (list (current-time) nil response)))
+                 (list (current-time) nil nil response)))
          (erase-buffer)
          (setq start nil)
          (while (string-match (concat "^"
                                       (regexp-quote
-                                       (or (elmo-nntp-spec-group spec)
-                                           "")) ".*$")
+                                       (or
+                                        (elmo-nntp-folder-group-internal
+                                         folder)
+                                        "")) ".*$")
                               response start)
            (insert (match-string 0 response) "\n")
            (setq start (match-end 0)))))
       (goto-char (point-min))
       (let ((len (count-lines (point-min) (point-max)))
            (i 0) regexp)
-       (if hierarchy
+       (if one-level
            (progn
              (setq regexp
                    (format "^\\(%s[^. ]+\\)\\([. ]\\).*\n"
-                           (if (and (elmo-nntp-spec-group spec)
-                                    (null (string=
-                                           (elmo-nntp-spec-group spec) "")))
-                               (concat (elmo-nntp-spec-group spec)
+                           (if (and
+                                (elmo-nntp-folder-group-internal folder)
+                                (null (string=
+                                       (elmo-nntp-folder-group-internal
+                                        folder) "")))
+                               (concat (elmo-nntp-folder-group-internal
+                                        folder)
                                        "\\.") "")))
              (while (looking-at regexp)
                (setq top-ng (elmo-match-buffer 1))
@@ -453,31 +579,41 @@ Don't cache if nil.")
        (when (> len elmo-display-progress-threshold)
          (elmo-display-progress
           'elmo-nntp-list-folders "Parsing active..." 100))))
-    (unless (string= (elmo-nntp-spec-hostname spec)
-                    elmo-default-nntp-server)
-      (setq append-serv (concat "@" (elmo-nntp-spec-hostname spec))))
-    (unless (eq (elmo-nntp-spec-port spec) elmo-default-nntp-port)
+
+    (setq username (elmo-net-folder-user-internal folder))
+    (when (and username
+              elmo-nntp-default-user
+              (string= username elmo-nntp-default-user))
+      (setq username nil))
+
+    (when (or username ; XXX: ad-hoc fix against username includes "@"
+             (not (string= (elmo-net-folder-server-internal folder)
+                           elmo-nntp-default-server)))
+      (setq append-serv (concat "@" (elmo-net-folder-server-internal
+                                    folder))))
+    (unless (eq (elmo-net-folder-port-internal folder) elmo-nntp-default-port)
       (setq append-serv (concat append-serv
                                ":" (int-to-string
-                                    (elmo-nntp-spec-port spec)))))
+                                    (elmo-net-folder-port-internal folder)))))
     (unless (eq (elmo-network-stream-type-symbol
-                (elmo-nntp-spec-stream-type spec))
-               elmo-default-nntp-stream-type)
+                (elmo-net-folder-stream-type-internal folder))
+               elmo-nntp-default-stream-type)
       (setq append-serv
            (concat append-serv
                    (elmo-network-stream-type-spec-string
-                    (elmo-nntp-spec-stream-type spec)))))
+                    (elmo-net-folder-stream-type-internal folder)))))
     (mapcar '(lambda (fld)
               (if (consp fld)
-                  (list (concat "-" (car fld)
-                                (and (elmo-nntp-spec-username spec)
+                  (list (concat "-" (elmo-nntp-decode-group-string (car fld))
+                                (and username
                                      (concat
-                                      ":" (elmo-nntp-spec-username spec)))
+                                      ":"
+                                      username))
                                 (and append-serv
                                      (concat append-serv))))
-                (concat "-" fld
-                        (and (elmo-nntp-spec-username spec)
-                             (concat ":" (elmo-nntp-spec-username spec)))
+                (concat "-" (elmo-nntp-decode-group-string fld)
+                        (and username
+                             (concat ":" username))
                         (and append-serv
                              (concat append-serv)))))
            ret-val)))
@@ -496,12 +632,11 @@ Don't cache if nil.")
      (goto-char (point-min))
      (read (current-buffer)))))
 
-(defun elmo-nntp-list-folder (spec &optional nohide)
-  (let ((session (elmo-nntp-get-session spec))
-       (group   (elmo-nntp-spec-group spec))
-       (killed (and elmo-use-killed-list
-                    (elmo-msgdb-killed-list-load
-                     (elmo-msgdb-expand-path spec))))
+(luna-define-method elmo-folder-list-messages-plugged ((folder
+                                                       elmo-nntp-folder)
+                                                      &optional nohide)
+  (let ((session (elmo-nntp-get-session folder))
+       (group   (elmo-nntp-folder-group-internal folder))
        response numbers use-listgroup)
     (save-excursion
       (when (setq use-listgroup (elmo-nntp-listgroup-p session))
@@ -528,39 +663,43 @@ Don't cache if nil.")
          (setq numbers (elmo-nntp-make-msglist
                         (elmo-match-string 2 response)
                         (elmo-match-string 3 response)))))
-      (elmo-living-messages numbers killed))))
+      numbers)))
 
-(defun elmo-nntp-max-of-folder (spec)
-  (let ((killed-list (and elmo-use-killed-list
-                         (elmo-msgdb-killed-list-load
-                          (elmo-msgdb-expand-path spec))))
+(luna-define-method elmo-folder-status ((folder elmo-nntp-folder))
+  (elmo-nntp-folder-status folder))
+
+(defun elmo-nntp-folder-status (folder)
+  (let ((killed-list (elmo-msgdb-killed-list-load
+                     (elmo-folder-msgdb-path folder)))
        end-num entry)
     (if elmo-nntp-groups-async
        (if (setq entry
                  (elmo-get-hash-val
-                  (concat (elmo-nntp-spec-group spec)
+                  (concat (elmo-nntp-folder-group-internal folder)
                           (elmo-nntp-folder-postfix
-                           (elmo-nntp-spec-username spec)
-                           (elmo-nntp-spec-hostname spec)
-                           (elmo-nntp-spec-port spec)
-                           (elmo-nntp-spec-stream-type spec)))
-                  elmo-nntp-groups-hashtb))
+                           (elmo-net-folder-user-internal folder)
+                           (elmo-net-folder-server-internal folder)
+                           (elmo-net-folder-port-internal folder)
+                           (elmo-net-folder-stream-type-internal folder)))
+                  elmo-newsgroups-hashtb))
            (progn
              (setq end-num (nth 2 entry))
-             (when (and killed-list elmo-use-killed-list
+             (when (and killed-list
                         (elmo-number-set-member end-num killed-list))
                ;; Max is killed.
                (setq end-num nil))
              (cons end-num (car entry)))
-         (error "No such newsgroup \"%s\"" (elmo-nntp-spec-group spec)))
-      (let ((session (elmo-nntp-get-session spec))
+         (error "No such newsgroup \"%s\""
+                (elmo-nntp-folder-group-internal folder)))
+      (let ((session (elmo-nntp-get-session folder))
            response e-num)
        (if (null session)
            (error "Connection failed"))
        (save-excursion
          (elmo-nntp-send-command session
-                                 (format "group %s"
-                                         (elmo-nntp-spec-group spec)))
+                                 (format
+                                  "group %s"
+                                  (elmo-nntp-folder-group-internal folder)))
          (setq response (elmo-nntp-read-response session))
          (if (and response
                   (string-match
@@ -571,14 +710,14 @@ Don't cache if nil.")
                               (elmo-match-string 3 response)))
                (setq e-num (string-to-int
                             (elmo-match-string 1 response)))
-               (when (and killed-list elmo-use-killed-list
+               (when (and killed-list
                           (elmo-number-set-member end-num killed-list))
                  ;; Max is killed.
                  (setq end-num nil))
                (cons end-num e-num))
            (if (null response)
                (error "Selecting newsgroup \"%s\" failed"
-                      (elmo-nntp-spec-group spec))
+                      (elmo-nntp-folder-group-internal folder))
              nil)))))))
 
 (defconst elmo-nntp-overview-index
@@ -593,7 +732,6 @@ Don't cache if nil.")
     ("xref" . 8)))
 
 (defun elmo-nntp-create-msgdb-from-overview-string (str
-                                                   folder
                                                    new-mark
                                                    already-mark
                                                    seen-mark
@@ -620,10 +758,11 @@ Don't cache if nil.")
        (while extras
          (setq ext (downcase (car extras)))
          (when (setq field-index (cdr (assoc ext elmo-nntp-overview-index)))
-           (setq field (aref ov-entity field-index))
-           (when (eq field-index 8) ;; xref
-             (setq field (elmo-msgdb-remove-field-string field)))
-           (setq extra (cons (cons ext field) extra)))
+            (when (> (length ov-entity) field-index)
+             (setq field (aref ov-entity field-index))
+             (when (eq field-index 8) ;; xref
+               (setq field (elmo-msgdb-remove-field-string field)))
+              (setq extra (cons (cons ext field) extra))))
          (setq extras (cdr extras)))
        (setq overview
              (elmo-msgdb-append-element
@@ -654,7 +793,8 @@ Don't cache if nil.")
        (setq message-id (aref ov-entity 4))
        (setq seen (member message-id seen-list))
        (if (setq gmark (or (elmo-msgdb-global-mark-get message-id)
-                           (if (elmo-cache-exists-p message-id);; XXX
+                           (if (elmo-file-cache-status
+                                (elmo-file-cache-get message-id))
                                (if seen
                                    nil
                                  already-mark)
@@ -668,73 +808,38 @@ Don't cache if nil.")
       (setq ov-list (cdr ov-list)))
     (list overview number-alist mark-alist)))
 
-(defun elmo-nntp-msgdb-create-as-numlist (spec numlist new-mark already-mark
-                                              seen-mark important-mark
-                                              seen-list)
-  "Create msgdb for SPEC for NUMLIST."
-  (elmo-nntp-msgdb-create spec numlist new-mark already-mark
-                         seen-mark important-mark seen-list
-                         t))
-
-(defun elmo-nntp-msgdb-create (spec numlist new-mark already-mark
-                                   seen-mark important-mark
-                                   seen-list &optional as-num)
-  (when numlist
-    (let ((filter  numlist)
-         (session (elmo-nntp-get-session spec))
-         beg-num end-num cur length
-         ret-val ov-str use-xover dir)
-      (elmo-nntp-select-group session (elmo-nntp-spec-group spec))
-      (when (setq use-xover (elmo-nntp-xover-p session))
-       (setq beg-num (car numlist)
-             cur beg-num
-             end-num (nth (1- (length numlist)) numlist)
-             length  (+ (- end-num beg-num) 1))
-       (message "Getting overview...")
-       (while (<= cur end-num)
-         (elmo-nntp-send-command
-          session
-          (format
-           "xover %s-%s"
-           (int-to-string cur)
-           (int-to-string
-            (+ cur
-               elmo-nntp-overview-fetch-chop-length))))
-         (with-current-buffer (elmo-network-session-buffer session)
-           (if ov-str
-               (setq ret-val
-                     (elmo-msgdb-append
-                      ret-val
-                      (elmo-nntp-create-msgdb-from-overview-string
-                       ov-str
-                       (elmo-nntp-spec-group spec)
-                       new-mark
-                       already-mark
-                       seen-mark
-                       important-mark
-                       seen-list
-                       filter
-                       )))))
-         (if (null (elmo-nntp-read-response session t))
-             (progn
-               (setq cur end-num);; exit while loop
-               (elmo-nntp-set-xover session nil)
-               (setq use-xover nil))
-           (if (null (setq ov-str (elmo-nntp-read-contents session)))
-               (error "Fetching overview failed")))
-         (setq cur (+ elmo-nntp-overview-fetch-chop-length cur 1))
-         (when (> length elmo-display-progress-threshold)
-           (elmo-display-progress
-            'elmo-nntp-msgdb-create "Getting overview..."
-            (/ (* (+ (- (min cur end-num)
-                        beg-num) 1) 100) length))))
-       (when (> length elmo-display-progress-threshold)
-         (elmo-display-progress
-          'elmo-nntp-msgdb-create "Getting overview..." 100)))
-      (if (not use-xover)
-         (setq ret-val (elmo-nntp-msgdb-create-by-header
-                        session numlist
-                        new-mark already-mark seen-mark seen-list))
+(luna-define-method elmo-folder-msgdb-create ((folder elmo-nntp-folder)
+                                             numbers new-mark already-mark
+                                             seen-mark important-mark
+                                             seen-list)
+  (elmo-nntp-folder-msgdb-create folder numbers new-mark already-mark
+                                seen-mark important-mark
+                                seen-list))
+
+(defun elmo-nntp-folder-msgdb-create (folder numbers new-mark already-mark
+                                            seen-mark important-mark
+                                            seen-list)
+  (let ((filter numbers)
+       (session (elmo-nntp-get-session folder))
+       beg-num end-num cur length
+       ret-val ov-str use-xover dir)
+    (elmo-nntp-select-group session (elmo-nntp-folder-group-internal
+                                    folder))
+    (when (setq use-xover (elmo-nntp-xover-p session))
+      (setq beg-num (car numbers)
+           cur beg-num
+           end-num (nth (1- (length numbers)) numbers)
+           length  (+ (- end-num beg-num) 1))
+      (message "Getting overview...")
+      (while (<= cur end-num)
+       (elmo-nntp-send-command
+        session
+        (format
+         "xover %s-%s"
+         (int-to-string cur)
+         (int-to-string
+          (+ cur
+             elmo-nntp-overview-fetch-chop-length))))
        (with-current-buffer (elmo-network-session-buffer session)
          (if ov-str
              (setq ret-val
@@ -742,52 +847,88 @@ Don't cache if nil.")
                     ret-val
                     (elmo-nntp-create-msgdb-from-overview-string
                      ov-str
-                     (elmo-nntp-spec-group spec)
                      new-mark
                      already-mark
                      seen-mark
                      important-mark
                      seen-list
-                     filter))))))
-      (when elmo-use-killed-list
-       (setq dir (elmo-msgdb-expand-path spec))
-       (elmo-msgdb-killed-list-save
-        dir
-        (nconc
-         (elmo-msgdb-killed-list-load dir)
-         (car (elmo-list-diff
-               numlist
-               (mapcar 'car
-                       (elmo-msgdb-get-number-alist
-                        ret-val)))))))
-      ;; If there are canceled messages, overviews are not obtained
-      ;; to max-number(inn 2.3?).
-      (when (and (elmo-nntp-max-number-precedes-list-active-p)
-                (elmo-nntp-list-active-p session))
-       (elmo-nntp-send-command session
-                               (format "list active %s"
-                                       (elmo-nntp-spec-group spec)))
-       (if (null (elmo-nntp-read-response session))
+                     filter
+                     )))))
+       (if (null (elmo-nntp-read-response session t))
            (progn
-             (elmo-nntp-set-list-active session nil)
-             (error "NNTP list command failed")))
-       (elmo-nntp-catchup-msgdb
-        ret-val
-        (nth 1 (read (concat "(" (elmo-nntp-read-contents
-                                  session) ")")))))
-      ret-val)))
-
-(defun elmo-nntp-sync-number-alist (spec number-alist)
+             (setq cur end-num);; exit while loop
+             (elmo-nntp-set-xover session nil)
+             (setq use-xover nil))
+         (if (null (setq ov-str (elmo-nntp-read-contents session)))
+             (error "Fetching overview failed")))
+       (setq cur (+ elmo-nntp-overview-fetch-chop-length cur 1))
+       (when (> length elmo-display-progress-threshold)
+         (elmo-display-progress
+          'elmo-nntp-msgdb-create "Getting overview..."
+          (/ (* (+ (- (min cur end-num)
+                      beg-num) 1) 100) length))))
+      (when (> length elmo-display-progress-threshold)
+       (elmo-display-progress
+        'elmo-nntp-msgdb-create "Getting overview..." 100)))
+    (if (not use-xover)
+       (setq ret-val (elmo-nntp-msgdb-create-by-header
+                      session numbers
+                      new-mark already-mark seen-mark seen-list))
+      (with-current-buffer (elmo-network-session-buffer session)
+       (if ov-str
+           (setq ret-val
+                 (elmo-msgdb-append
+                  ret-val
+                  (elmo-nntp-create-msgdb-from-overview-string
+                   ov-str
+                   new-mark
+                   already-mark
+                   seen-mark
+                   important-mark
+                   seen-list
+                   filter))))))
+    (elmo-folder-set-killed-list-internal
+     folder
+     (nconc
+      (elmo-folder-killed-list-internal folder)
+      (car (elmo-list-diff
+           numbers
+           (mapcar 'car
+                   (elmo-msgdb-get-number-alist
+                    ret-val))))))
+    ;; If there are canceled messages, overviews are not obtained
+    ;; to max-number(inn 2.3?).
+    (when (and (elmo-nntp-max-number-precedes-list-active-p)
+              (elmo-nntp-list-active-p session))
+      (elmo-nntp-send-command session
+                             (format "list active %s"
+                                     (elmo-nntp-folder-group-internal
+                                      folder)))
+      (if (null (elmo-nntp-read-response session))
+         (progn
+           (elmo-nntp-set-list-active session nil)
+           (error "NNTP list command failed")))
+      (elmo-nntp-catchup-msgdb
+       ret-val
+       (nth 1 (read (concat "(" (elmo-nntp-read-contents
+                                session) ")")))))
+    ret-val))
+
+(luna-define-method elmo-folder-update-number ((folder elmo-nntp-folder))
   (if (elmo-nntp-max-number-precedes-list-active-p)
-      (let ((session (elmo-nntp-get-session spec)))
+      (let ((session (elmo-nntp-get-session folder))
+           (number-alist (elmo-msgdb-get-number-alist
+                          (elmo-folder-msgdb folder))))
        (if (elmo-nntp-list-active-p session)
            (let (msgdb-max max-number)
              ;; If there are canceled messages, overviews are not obtained
              ;; to max-number(inn 2.3?).
-             (elmo-nntp-select-group session (elmo-nntp-spec-group spec))
+             (elmo-nntp-select-group session
+                                     (elmo-nntp-folder-group-internal folder))
              (elmo-nntp-send-command session
                                      (format "list active %s"
-                                             (elmo-nntp-spec-group spec)))
+                                             (elmo-nntp-folder-group-internal
+                                              folder)))
              (if (null (elmo-nntp-read-response session))
                  (error "NNTP list command failed"))
              (setq max-number
@@ -799,18 +940,18 @@ Don't cache if nil.")
              (if (or (and number-alist (not msgdb-max))
                      (and msgdb-max max-number
                           (< msgdb-max max-number)))
-                 (nconc number-alist
-                        (list (cons max-number nil)))
-               number-alist))
-         number-alist))))
+                 (elmo-msgdb-set-number-alist
+                  (elmo-folder-msgdb folder)
+                  (nconc number-alist
+                         (list (cons max-number nil))))))))))
 
-(defun elmo-nntp-msgdb-create-by-header (session numlist
+(defun elmo-nntp-msgdb-create-by-header (session numbers
                                                 new-mark already-mark
                                                 seen-mark seen-list)
   (with-temp-buffer
-    (elmo-nntp-retrieve-headers session (current-buffer) numlist)
+    (elmo-nntp-retrieve-headers session (current-buffer) numbers)
     (elmo-nntp-msgdb-create-message
-     (length numlist) new-mark already-mark seen-mark seen-list)))
+     (length numbers) new-mark already-mark seen-mark seen-list)))
 
 (defun elmo-nntp-parse-xhdr-response (string)
   (let (response)
@@ -852,7 +993,12 @@ Don't cache if nil.")
   "Get nntp header string."
   (save-excursion
     (let ((session (elmo-nntp-get-session
-                   (list 'nntp nil user server port type))))
+                   (luna-make-entity
+                    'elmo-nntp-folder
+                    :user user
+                    :server server
+                    :port port
+                    :stream-type type))))
       (elmo-nntp-send-command session
                              (format "head %s" msgid))
       (if (elmo-nntp-read-response session)
@@ -860,10 +1006,26 @@ Don't cache if nil.")
       (with-current-buffer (elmo-network-session-buffer session)
        (std11-field-body "Newsgroups")))))
 
-(defun elmo-nntp-read-msg (spec number outbuf &optional msgdb unread)
-  (let ((session (elmo-nntp-get-session spec)))
+(luna-define-method elmo-message-fetch-with-cache-process :around
+  ((folder elmo-nntp-folder) number strategy &optional section unread)
+  (when (luna-call-next-method)
+    (elmo-nntp-setup-crosspost-buffer folder number)
+    (unless unread
+      (elmo-nntp-folder-update-crosspost-message-alist
+       folder (list number)))
+    t))
+
+(luna-define-method elmo-message-fetch-plugged ((folder elmo-nntp-folder)
+                                               number strategy
+                                               &optional section outbuf
+                                               unread)
+  (elmo-nntp-message-fetch folder number strategy section outbuf unread))
+
+(defun elmo-nntp-message-fetch (folder number strategy section outbuf unread)
+  (let ((session (elmo-nntp-get-session folder))
+       newsgroups)
     (with-current-buffer (elmo-network-session-buffer session)
-      (elmo-nntp-select-group session (elmo-nntp-spec-group spec))
+      (elmo-nntp-select-group session (elmo-nntp-folder-group-internal folder))
       (elmo-nntp-send-command session (format "article %s" number))
       (if (null (elmo-nntp-read-response session t))
          (progn
@@ -875,21 +1037,22 @@ Don't cache if nil.")
            (goto-char (point-min))
            (while (re-search-forward "^\\." nil t)
              (replace-match "")
-             (forward-line))))))))
-
-;;(defun elmo-msgdb-nntp-overview-create-range (spec beg end mark)
-;;  (elmo-nntp-overview-create-range hostname beg end mark folder)))
-
-;;(defun elmo-msgdb-nntp-max-of-folder (spec)
-;;  (elmo-nntp-max-of-folder hostname folder)))
-
-(defun elmo-nntp-append-msg (spec string &optional msg no-see))
+             (forward-line))
+           (elmo-nntp-setup-crosspost-buffer folder number)
+           (unless unread
+             (elmo-nntp-folder-update-crosspost-message-alist
+              folder (list number)))))))))
 
 (defun elmo-nntp-post (hostname content-buf)
   (let ((session (elmo-nntp-get-session
-                 (list 'nntp nil elmo-default-nntp-user
-                       hostname elmo-default-nntp-port
-                       elmo-default-nntp-stream-type)))
+                 (luna-make-entity
+                  'elmo-nntp-folder
+                  :user elmo-nntp-default-user
+                  :server hostname
+                  :port elmo-nntp-default-port
+                  :stream-type
+                  (elmo-get-network-stream-type
+                   elmo-nntp-default-stream-type))))
        response has-message-id)
     (save-excursion
       (set-buffer content-buf)
@@ -914,7 +1077,7 @@ Don't cache if nil.")
       (if (not (string-match
                "^2" (setq response (elmo-nntp-read-raw-response
                                     session))))
-         (error (concat "NNTP error: " response))))))
+         (error "NNTP error: %s" response)))))
 
 (defsubst elmo-nntp-send-data-line (session line)
   "Send LINE to SESSION."
@@ -941,38 +1104,25 @@ Don't cache if nil.")
        (unless (eq (forward-line 1) 0) (setq data-continue nil))
        (elmo-nntp-send-data-line session line)))))
 
-(defun elmo-nntp-delete-msgs (spec msgs)
-  "MSGS on FOLDER at SERVER pretended as Deleted. Returns nil if failed."
-  (if elmo-use-killed-list
-      (let* ((dir (elmo-msgdb-expand-path spec))
-            (killed-list (elmo-msgdb-killed-list-load dir)))
-       (mapcar '(lambda (msg)
-                  (setq killed-list
-                        (elmo-msgdb-set-as-killed killed-list msg)))
-               msgs)
-       (elmo-msgdb-killed-list-save dir killed-list)))
-  t)
+(luna-define-method elmo-folder-delete-messages ((folder elmo-nntp-folder)
+                                                numbers)
+  (elmo-nntp-folder-delete-messages folder numbers))
 
-(defun elmo-nntp-check-validity (spec validity-file)
-  t)
-(defun elmo-nntp-sync-validity (spec validity-file)
+(defun elmo-nntp-folder-delete-messages (folder numbers)
+  (let ((killed-list (elmo-folder-killed-list-internal folder)))
+    (dolist (number numbers)
+      (setq killed-list
+           (elmo-msgdb-set-as-killed killed-list number)))
+    (elmo-folder-set-killed-list-internal folder killed-list))
   t)
 
-(defun elmo-nntp-folder-exists-p (spec)
-  (let ((session (elmo-nntp-get-session spec)))
-    (if (elmo-nntp-plugged-p spec)
-       (progn
-         (elmo-nntp-send-command session
-                                 (format "group %s"
-                                         (elmo-nntp-spec-group spec)))
-         (elmo-nntp-read-response session))
-      t)))
-
-(defun elmo-nntp-folder-creatable-p (spec)
-  nil)
-
-(defun elmo-nntp-create-folder (spec)
-  nil) ; noop
+(luna-define-method elmo-folder-exists-p-plugged ((folder elmo-nntp-folder))
+  (let ((session (elmo-nntp-get-session folder)))
+         (elmo-nntp-send-command
+          session
+          (format "group %s"
+                  (elmo-nntp-folder-group-internal folder)))
+    (elmo-nntp-read-response session)))
 
 (defun elmo-nntp-retrieve-field (spec field from-msgs)
   "Retrieve FIELD values from FROM-MSGS.
@@ -980,7 +1130,7 @@ Returns a list of cons cells like (NUMBER . VALUE)"
   (let ((session (elmo-nntp-get-session spec)))
     (if (elmo-nntp-xhdr-p session)
        (progn
-         (elmo-nntp-select-group session (elmo-nntp-spec-group spec))
+         (elmo-nntp-select-group session (elmo-nntp-folder-group-internal spec))
          (elmo-nntp-send-command session
                                  (format "xhdr %s %s"
                                          field
@@ -1003,45 +1153,47 @@ Returns a list of cons cells like (NUMBER . VALUE)"
   (let ((search-key (elmo-filter-key condition)))
     (cond
      ((string= "last" search-key)
-      (let ((numbers (or from-msgs (elmo-nntp-list-folder spec))))
+      (let ((numbers (or from-msgs (elmo-folder-list-messages spec))))
        (nthcdr (max (- (length numbers)
                        (string-to-int (elmo-filter-value condition)))
                     0)
                numbers)))
      ((string= "first" search-key)
-      (let* ((numbers (or from-msgs (elmo-nntp-list-folder spec)))
+      (let* ((numbers (or from-msgs (elmo-folder-list-messages spec)))
             (rest (nthcdr (string-to-int (elmo-filter-value condition) )
                           numbers)))
        (mapcar '(lambda (x) (delete x numbers)) rest)
        numbers))
      ((or (string= "since" search-key)
          (string= "before" search-key))
-      (let* ((key-date (elmo-date-get-datevec (elmo-filter-value condition)))
-            (key-datestr (elmo-date-make-sortable-string key-date))
+      (let* ((specified-date (elmo-date-make-sortable-string
+                             (elmo-date-get-datevec (elmo-filter-value
+                                                     condition))))
             (since (string= "since" search-key))
-            result)
+            field-date  result)
        (if (eq (elmo-filter-type condition) 'unmatch)
            (setq since (not since)))
        (setq result
              (delq nil
                    (mapcar
                     (lambda (pair)
+                      (setq field-date
+                            (elmo-date-make-sortable-string
+                             (timezone-fix-time
+                              (cdr pair)
+                              (current-time-zone) nil)))
                       (if (if since
-                              (string< key-datestr
-                                       (elmo-date-make-sortable-string
-                                        (timezone-fix-time
-                                         (cdr pair)
-                                         (current-time-zone) nil)))
-                            (not (string< key-datestr
-                                          (elmo-date-make-sortable-string
-                                           (timezone-fix-time
-                                            (cdr pair)
-                                            (current-time-zone) nil)))))
+                              (or (string= specified-date field-date)
+                                  (string< specified-date field-date))
+                            (string< field-date
+                                     specified-date))
                           (car pair)))
                     (elmo-nntp-retrieve-field spec "date" from-msgs))))
        (if from-msgs
            (elmo-list-filter from-msgs result)
          result)))
+     ((string= "body" search-key)
+      nil)
      (t
       (let ((val (elmo-filter-value condition))
            (negative (eq (elmo-filter-type condition) 'unmatch))
@@ -1063,43 +1215,57 @@ Returns a list of cons cells like (NUMBER . VALUE)"
            (elmo-list-filter from-msgs result)
          result))))))
 
-(defun elmo-nntp-search (spec condition &optional from-msgs)
+(defun elmo-nntp-search-internal (folder condition from-msgs)
   (let (result)
     (cond
      ((vectorp condition)
       (setq result (elmo-nntp-search-primitive
-                   spec condition from-msgs)))
+                   folder condition from-msgs)))
      ((eq (car condition) 'and)
-      (setq result (elmo-nntp-search spec (nth 1 condition) from-msgs)
+      (setq result (elmo-nntp-search-internal folder
+                                             (nth 1 condition)
+                                             from-msgs)
            result (elmo-list-filter result
-                                    (elmo-nntp-search
-                                     spec (nth 2 condition)
+                                    (elmo-nntp-search-internal
+                                     folder (nth 2 condition)
                                      from-msgs))))
      ((eq (car condition) 'or)
-      (setq result (elmo-nntp-search spec (nth 1 condition) from-msgs)
+      (setq result (elmo-nntp-search-internal folder
+                                             (nth 1 condition)
+                                             from-msgs)
            result (elmo-uniq-list
                    (nconc result
-                          (elmo-nntp-search spec (nth 2 condition)
-                                            from-msgs)))
+                          (elmo-nntp-search-internal folder
+                                                     (nth 2 condition)
+                                                     from-msgs)))
            result (sort result '<))))))
 
-(defun elmo-nntp-get-folders-info-prepare (spec session-keys)
+(luna-define-method elmo-folder-search :around ((folder elmo-nntp-folder)
+                                               condition &optional from-msgs)
+  (if (and (elmo-folder-plugged-p folder)
+          (not (string= "body" (elmo-filter-key condition))))
+      (elmo-nntp-search-internal folder condition from-msgs)
+    (luna-call-next-method)))
+
+(defun elmo-nntp-get-folders-info-prepare (folder session-keys)
   (condition-case ()
-      (let ((session (elmo-nntp-get-session spec))
+      (let ((session (elmo-nntp-get-session folder))
            key count)
        (with-current-buffer (elmo-network-session-buffer session)
          (unless (setq key (assoc session session-keys))
            (erase-buffer)
            (setq key (cons session
                            (vector 0
-                                   (elmo-nntp-spec-hostname spec)
-                                   (elmo-nntp-spec-username spec)
-                                   (elmo-nntp-spec-port spec)
-                                   (elmo-nntp-spec-stream-type spec))))
+                                   (elmo-net-folder-server-internal folder)
+                                   (elmo-net-folder-user-internal folder)
+                                   (elmo-net-folder-port-internal folder)
+                                   (elmo-net-folder-stream-type-internal
+                                    folder))))
            (setq session-keys (nconc session-keys (list key))))
          (elmo-nntp-send-command session
                                  (format "group %s"
-                                         (elmo-nntp-spec-group spec))
+                                         (elmo-nntp-folder-group-internal
+                                          folder))
                                  'noerase)
          (if elmo-nntp-get-folders-securely
              (accept-process-output
@@ -1124,8 +1290,8 @@ Returns a list of cons cells like (NUMBER . VALUE)"
             (user    (aref key 2))
             (port    (aref key 3))
             (type    (aref key 4))
-            (hashtb (or elmo-nntp-groups-hashtb
-                        (setq elmo-nntp-groups-hashtb
+            (hashtb (or elmo-newsgroups-hashtb
+                        (setq elmo-newsgroups-hashtb
                               (elmo-make-hash count)))))
        (save-excursion
          (elmo-nntp-groups-read-response session cur count)
@@ -1135,11 +1301,11 @@ Returns a list of cons cells like (NUMBER . VALUE)"
                (postfix (elmo-nntp-folder-postfix user server port type)))
            (if (not (string= postfix ""))
                (save-excursion
-                 (replace-regexp "^\\(211 [0-9]+ [0-9]+ [0-9]+ [^ \n]+\\).*$"
-                                 (concat "\\1"
-                                         (elmo-replace-in-string
-                                          postfix
-                                          "\\\\" "\\\\\\\\\\\\\\\\"))))))
+                 (while (re-search-forward "^\\(211 [0-9]+ [0-9]+ [0-9]+ [^ \n]+\\)\\(.*\\)$" nil t)
+                   (replace-match (concat (match-string 1)
+                                          (elmo-replace-in-string
+                                           postfix
+                                           "\\\\" "\\\\\\\\\\\\\\\\")))))))
          (let (len min max group)
            (while (not (eobp))
              (condition-case ()
@@ -1200,17 +1366,6 @@ Returns a list of cons cells like (NUMBER . VALUE)"
        (replace-match "" t t))
       (copy-to-buffer outbuf (point-min) (point-max)))))
 
-(defun elmo-nntp-make-groups-hashtb (folders &optional size)
-  (let ((hashtb (or elmo-nntp-groups-hashtb
-                   (setq elmo-nntp-groups-hashtb
-                         (elmo-make-hash (or size (length folders)))))))
-    (mapcar
-     '(lambda (fld)
-       (or (elmo-get-hash-val fld hashtb)
-           (elmo-set-hash-val fld nil hashtb)))
-     folders)
-    hashtb))
-
 ;; from nntp.el [Gnus]
 
 (defsubst elmo-nntp-next-result-arrived-p ()
@@ -1311,7 +1466,8 @@ Returns a list of cons cells like (NUMBER . VALUE)"
                (setq seen (member message-id seen-list))
                (if (setq gmark
                          (or (elmo-msgdb-global-mark-get message-id)
-                             (if (elmo-cache-exists-p message-id);; XXX
+                             (if (elmo-file-cache-status
+                                  (elmo-file-cache-get message-id))
                                  (if seen
                                      nil
                                    already-mark)
@@ -1335,39 +1491,135 @@ Returns a list of cons cells like (NUMBER . VALUE)"
         'elmo-nntp-msgdb-create-message "Creating msgdb..." 100))
       (list overview number-alist mark-alist))))
 
-(defun elmo-nntp-use-cache-p (spec number)
+(luna-define-method elmo-message-use-cache-p ((folder elmo-nntp-folder) number)
   elmo-nntp-use-cache)
 
-(defun elmo-nntp-local-file-p (spec number)
-  nil)
-
-(defun elmo-nntp-port-label (spec)
-  (concat "nntp"
-         (if (elmo-nntp-spec-stream-type spec)
-             (concat "!" (symbol-name
-                          (elmo-network-stream-type-symbol
-                           (elmo-nntp-spec-stream-type spec)))))))
-
-(defsubst elmo-nntp-portinfo (spec)
-  (list (elmo-nntp-spec-hostname spec)
-       (elmo-nntp-spec-port spec)))
-
-(defun elmo-nntp-plugged-p (spec)
-  (apply 'elmo-plugged-p
-        (append (elmo-nntp-portinfo spec)
-                (list nil (quote (elmo-nntp-port-label spec))))))
-
-(defun elmo-nntp-set-plugged (spec plugged add)
-  (apply 'elmo-set-plugged plugged
-        (append (elmo-nntp-portinfo spec)
-                (list nil nil (quote (elmo-nntp-port-label spec)) add))))
-
-(defalias 'elmo-nntp-list-folder-unread
-  'elmo-generic-list-folder-unread)
-(defalias 'elmo-nntp-list-folder-important
-  'elmo-generic-list-folder-important)
-(defalias 'elmo-nntp-commit 'elmo-generic-commit)
-(defalias 'elmo-nntp-folder-diff 'elmo-generic-folder-diff)
+(defun elmo-nntp-parse-newsgroups (string &optional subscribe-only)
+  (let ((nglist (elmo-parse string "[ \t\f\r\n,]*\\([^ \t\f\r\n,]+\\)"))
+       ngs)
+    (if (not subscribe-only)
+       nglist
+      (dolist (ng nglist)
+       (if (intern-soft ng elmo-newsgroups-hashtb)
+           (setq ngs (cons ng ngs))))
+      ngs)))
+
+;;; Crosspost processing.
+
+;; 1. setup crosspost alist.
+;;    1.1. When message is fetched and is crossposted message,
+;;         it is remembered in `temp-crosses' slot.
+;;         temp-crosses slot is a list of cons cell:
+;;         (NUMBER . (MESSAGE-ID (LIST-OF-NEWSGROUPS) 'ng))
+;;    1.2. In elmo-folder-close, `temp-crosses' slot is cleared,
+;;    1.3. In elmo-folder-mark-as-read, move crosspost entry
+;;         from `temp-crosses' slot to `elmo-crosspost-message-alist'.
+
+;; 2. process crosspost alist.
+;;    2.1. At elmo-folder-process-crosspost, setup `reads' slot from
+;;         `elmo-crosspost-message-alist'.
+;;    2.2. remove crosspost entry for current newsgroup from
+;;         `elmo-crosspost-message-alist'.
+;;    2.3. elmo-folder-list-unreads return unread message list according to
+;;         `reads' slot.
+;;         (There's a problem that if `elmo-folder-list-unreads'
+;;           never executed, crosspost information is thrown away.)
+;;    2.4. In elmo-folder-close, `read' slot is cleared,
+
+(defun elmo-nntp-setup-crosspost-buffer (folder number)
+;;    1.1. When message is fetched and is crossposted message,
+;;         it is remembered in `temp-crosses' slot.
+;;         temp-crosses slot is a list of cons cell:
+;;         (NUMBER . (MESSAGE-ID (LIST-OF-NEWSGROUPS) 'ng))
+  (let (newsgroups crosspost-newsgroups message-id)
+    (save-restriction
+      (std11-narrow-to-header)
+      (setq newsgroups (std11-fetch-field "newsgroups")
+           message-id (std11-msg-id-string
+                       (car (std11-parse-msg-id-string
+                             (std11-fetch-field "message-id"))))))
+    (when newsgroups
+      (when (setq crosspost-newsgroups
+                 (delete
+                  (elmo-nntp-folder-group-internal folder)
+                  (elmo-nntp-parse-newsgroups newsgroups t)))
+       (unless (assq number
+                     (elmo-nntp-folder-temp-crosses-internal folder))
+         (elmo-nntp-folder-set-temp-crosses-internal
+          folder
+          (cons (cons number (list message-id crosspost-newsgroups 'ng))
+                (elmo-nntp-folder-temp-crosses-internal folder))))))))
+
+(luna-define-method elmo-folder-close-internal ((folder elmo-nntp-folder))
+;;    1.2. In elmo-folder-close, `temp-crosses' slot is cleared,
+  (elmo-nntp-folder-set-temp-crosses-internal folder nil)
+  (elmo-nntp-folder-set-reads-internal folder nil)
+  )
+
+(defun elmo-nntp-folder-update-crosspost-message-alist (folder numbers)
+;;    1.3. In elmo-folder-mark-as-read, move crosspost entry
+;;         from `temp-crosses' slot to `elmo-crosspost-message-alist'.
+  (let (elem)
+    (dolist (number numbers)
+      (when (setq elem (assq number
+                            (elmo-nntp-folder-temp-crosses-internal folder)))
+       (unless (assoc (cdr (cdr elem)) elmo-crosspost-message-alist)
+         (setq elmo-crosspost-message-alist
+               (cons (cdr elem) elmo-crosspost-message-alist)))
+       (elmo-nntp-folder-set-temp-crosses-internal
+        folder
+        (delq elem (elmo-nntp-folder-temp-crosses-internal folder)))))))
+
+(luna-define-method elmo-folder-mark-as-read ((folder elmo-nntp-folder)
+                                             numbers)
+  (elmo-nntp-folder-update-crosspost-message-alist folder numbers)
+  t)
+
+(luna-define-method elmo-folder-process-crosspost ((folder elmo-nntp-folder)
+                                                  &optional
+                                                  number-alist)
+  (elmo-nntp-folder-process-crosspost folder number-alist))
+
+(defun elmo-nntp-folder-process-crosspost (folder number-alist)
+;;    2.1. At elmo-folder-process-crosspost, setup `reads' slot from
+;;         `elmo-crosspost-message-alist'.
+;;    2.2. remove crosspost entry for current newsgroup from
+;;         `elmo-crosspost-message-alist'.
+  (let (cross-deletes reads entity ngs)
+    (dolist (cross elmo-crosspost-message-alist)
+      (if number-alist
+         (when (setq entity (rassoc (nth 0 cross) number-alist))
+           (setq reads (cons (car entity) reads)))
+       (when (setq entity (elmo-msgdb-overview-get-entity
+                           (nth 0 cross)
+                           (elmo-folder-msgdb folder)))
+         (setq reads (cons (elmo-msgdb-overview-entity-get-number entity)
+                           reads))))
+      (when entity
+       (if (setq ngs (delete (elmo-nntp-folder-group-internal folder)
+                             (nth 1 cross)))
+           (setcar (cdr cross) ngs)
+         (setq cross-deletes (cons cross cross-deletes)))
+       (setq elmo-crosspost-message-alist-modified t)))
+    (dolist (dele cross-deletes)
+      (setq elmo-crosspost-message-alist (delq
+                                         dele
+                                         elmo-crosspost-message-alist)))
+    (elmo-nntp-folder-set-reads-internal folder reads)))
+
+(luna-define-method elmo-folder-list-unreads-internal
+  ((folder elmo-nntp-folder) unread-marks mark-alist)
+  ;;    2.3. elmo-folder-list-unreads return unread message list according to
+  ;;         `reads' slot.
+  (let ((mark-alist (or mark-alist (elmo-msgdb-get-mark-alist
+                                   (elmo-folder-msgdb folder)))))
+    (elmo-living-messages (delq nil
+                               (mapcar
+                                (lambda (x)
+                                  (if (member (nth 1 x) unread-marks)
+                                      (car x)))
+                                mark-alist))
+                         (elmo-nntp-folder-reads-internal folder))))
 
 (require 'product)
 (product-provide (provide 'elmo-nntp) (require 'elmo-version))