Working branch `elmo-lunafy' is created.
[elisp/wanderlust.git] / elmo / elmo-pop3.el
index cd20ee7..d52f853 100644 (file)
 
 (require 'elmo-msgdb)
 (require 'elmo-net)
+
 (eval-when-compile
-  (require 'elmo-util)
-  (condition-case nil
-      (progn
-       (require 'starttls)
-       (require 'sasl))
-    (error))
-  (defun-maybe md5 (a))
-  (defun-maybe starttls-negotiate (a)))
-(condition-case nil
-    (progn
-      (require 'sasl))
-  (error))
-
-(defvar elmo-pop3-use-uidl t
-  "*If non-nil, use UIDL.")
+  (require 'elmo-util))
+
+(eval-and-compile
+  (autoload 'md5 "md5"))
+
+;; POP3
+(defvar elmo-default-pop3-user (or (getenv "USER")
+                                  (getenv "LOGNAME")
+                                  (user-login-name))
+  "*Default username for POP3.")
+(defvar elmo-default-pop3-server  "localhost"
+  "*Default POP3 server.")
+(defvar elmo-default-pop3-authenticate-type 'user
+  "*Default Authentication type for POP3.")
+(defvar elmo-default-pop3-port 110
+  "*Default POP3 port.")
+(defvar elmo-default-pop3-stream-type nil
+  "*Default stream type for POP3.
+Any symbol value of `elmo-network-stream-type-alist'.")
+
+
+(defvar elmo-pop3-stream-type-alist nil
+  "*Stream bindings for POP3.
+This is taken precedence over `elmo-network-stream-type-alist'.")
+
+
+(defvar elmo-pop3-default-use-uidl t
+  "If non-nil, use UIDL on POP3.")
+
+(defvar elmo-pop3-use-uidl-internal t
+  "(Internal switch for using UIDL on POP3).")
+(defvar elmo-pop3-inhibit-uidl nil
+  "(Internal switch for using UIDL on POP3).")
 
 (defvar elmo-pop3-exists-exactly t)
 
+;;; ELMO POP3 folder
 (eval-and-compile
-  (luna-define-class elmo-pop3-session (elmo-network-session) ()))
+  (luna-define-class elmo-pop3-folder (elmo-net-folder)
+                    (use-uidl location-alist))
+  (luna-define-internal-accessors 'elmo-pop3-folder))
+
+(luna-define-method elmo-folder-initialize :around ((folder
+                                                    elmo-pop3-folder)
+                                                   name)
+  (let ((elmo-network-stream-type-alist
+        (if elmo-pop3-stream-type-alist
+            (append elmo-pop3-stream-type-alist
+                    elmo-network-stream-type-alist)
+          elmo-network-stream-type-alist)))
+    (setq name (luna-call-next-method))
+    ;; Setup slots for elmo-net-folder
+    (when (string-match "^\\([^:/!]*\\)\\(/[^/:@!]+\\)?\\(:[^/:@!]+\\)?" name)
+      (elmo-net-folder-set-user-internal folder
+                                        (if (match-beginning 1)
+                                            (elmo-match-string 1 name)))
+      (if (eq (length (elmo-net-folder-user-internal folder)) 0)
+         (elmo-net-folder-set-user-internal folder
+                                            elmo-default-pop3-user))
+      (elmo-net-folder-set-auth-internal
+       folder
+       (if (match-beginning 2)
+          (intern (elmo-match-substring 2 name 1))
+        elmo-default-pop3-authenticate-type))
+      (elmo-pop3-folder-set-use-uidl-internal
+       folder
+       (if (match-beginning 3)
+          (string= (elmo-match-substring 3 name 1) "uidl")
+        elmo-pop3-default-use-uidl)))
+    (unless (elmo-net-folder-server-internal folder)
+      (elmo-net-folder-set-server-internal folder 
+                                          elmo-default-pop3-server))
+    (unless (elmo-net-folder-port-internal folder)
+      (elmo-net-folder-set-port-internal folder
+                                        elmo-default-pop3-port))
+    (unless (elmo-net-folder-stream-type-internal folder)
+      (elmo-net-folder-set-stream-type-internal
+       folder
+       elmo-default-pop3-stream-type))
+    folder))
+
+;;; POP3 session
+(luna-define-class elmo-pop3-session (elmo-network-session) ())
 
 ;; buffer-local
 (defvar elmo-pop3-read-point nil)
                                    elmo-pop3-list-done))
 
 (luna-define-method elmo-network-close-session ((session elmo-pop3-session))
-  (unless (memq (process-status
+  (when (elmo-network-session-process-internal session)
+    (when (memq (process-status
                 (elmo-network-session-process-internal session))
-               '(closed exit))
-    (elmo-pop3-send-command (elmo-network-session-process-internal session)
-                           "quit")
-    (or (elmo-pop3-read-response
-        (elmo-network-session-process-internal session) t)
-       (error "POP error: QUIT failed")))
-  (kill-buffer (process-buffer
-               (elmo-network-session-process-internal session)))
-  (delete-process (elmo-network-session-process-internal session)))
-
-(defun elmo-pop3-get-session (spec &optional if-exists)
-  (elmo-network-get-session
-   'elmo-pop3-session
-   "POP3"
-   (elmo-pop3-spec-hostname spec)
-   (elmo-pop3-spec-port spec)
-   (elmo-pop3-spec-username spec)
-   (elmo-pop3-spec-auth spec)
-   (elmo-pop3-spec-stream-type spec)
-   if-exists))
+               '(open run))
+      (let ((buffer (process-buffer 
+                    (elmo-network-session-process-internal session))))
+       (elmo-pop3-send-command (elmo-network-session-process-internal session)
+                               "quit")
+       ;; process is dead.
+       (or (elmo-pop3-read-response
+            (elmo-network-session-process-internal session)
+            t buffer)
+           (error "POP error: QUIT failed"))))
+    (kill-buffer (process-buffer
+                 (elmo-network-session-process-internal session)))
+    (delete-process (elmo-network-session-process-internal session))))
+
+(defun elmo-pop3-get-session (folder &optional if-exists)
+  (let ((elmo-pop3-use-uidl-internal (if elmo-pop3-inhibit-uidl
+                                        nil
+                                      (elmo-pop3-folder-use-uidl-internal
+                                       folder))))
+    (elmo-network-get-session 'elmo-pop3-session "POP3" folder if-exists)))
 
 (defun elmo-pop3-send-command (process command &optional no-erase)
   (with-current-buffer (process-buffer process)
     (process-send-string process command)
     (process-send-string process "\r\n")))
 
-(defun elmo-pop3-read-response (process &optional not-command)
-  (with-current-buffer (process-buffer process)
+(defun elmo-pop3-read-response (process &optional not-command buffer)
+  ;; buffer is in case for process is dead.
+  (with-current-buffer (or buffer (process-buffer process))
     (let ((case-fold-search nil)
          (response-string nil)
          (response-continue t)
                (setq return-value nil))
            (setq elmo-pop3-read-point match-end)
            (if not-command
-               (setq response-continue nil))
+               (setq response-continue nil))
            (setq return-value
                  (if return-value
                      (concat return-value "\n" response-string)
                    (elmo-network-session-greeting-internal session))
       ;; good, APOP ready server
       (progn
-       (require 'md5)
        (elmo-pop3-send-command
         (elmo-network-session-process-internal session)
         (format "apop %s %s"
             t)
            (signal 'elmo-authenticate-error
                    '(elmo-pop3-auth-apop))))
-    (signal 'elmo-open-error '(elmo-pop-auth-user))))
-
-;;; dirty hack
-(defconst sasl-pop3-user-steps
-  '(sasl-pop3-user-response-1
-    sasl-pop3-user-response-2))
-
-(defun sasl-pop3-user-response-1 (client step)
-  (sasl-client-name client))
-
-(defun sasl-pop3-user-response-2 (client step)
-  (format "PASS %s"
-         (sasl-read-passphrase
-          (format "LOGIN passphrase for %s: "
-                  (sasl-client-name client)))))
-
-(put 'sasl-pop3-user 'sasl-mechanism
-     (sasl-make-mechanism "USER" sasl-pop3-user-steps))
-
-(provide 'sasl-pop3-user)
-
-(defconst sasl-pop3-apop-steps
-  '(sasl-pop3-apop-response))
-
-(defun sasl-pop3-apop-response (client step)
-  (require 'md5)
-  (format "%s %s"
-         (sasl-client-name client)
-         (md5
-          (concat (match-string
-                   1
-                   (elmo-network-session-greeting-internal session))
-                  (sasl-read-passphrase
-                   (format "LOGIN passphrase for %s: "
-                           (sasl-client-name client)))))))
-
-(put 'sasl-pop3-apop 'sasl-mechanism
-     (sasl-make-mechanism "APOP" sasl-pop3-apop-steps))
-
-(provide 'sasl-pop3-apop)
-
+    (signal 'elmo-open-error '(elmo-pop3-auth-apop))))
+    
 (luna-define-method elmo-network-initialize-session-buffer :after
   ((session elmo-pop3-session) buffer)
   (with-current-buffer buffer
     (with-current-buffer (process-buffer process)
       (set-process-filter process 'elmo-pop3-process-filter)
       (setq elmo-pop3-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 "+OK")))
+       (accept-process-output process 1))
+      (setq elmo-pop3-read-point (point))
       (or (elmo-network-session-set-greeting-internal
           session
           (elmo-pop3-read-response process t))
   (with-current-buffer (process-buffer 
                        (elmo-network-session-process-internal session))
     (let* ((process (elmo-network-session-process-internal session))
-        (auth (elmo-network-session-auth-internal session))
-        (auth (mapcar '(lambda (mechanism) (upcase (symbol-name mechanism)))
-                      (if (listp auth) auth (list auth))))
-        (sasl-mechanism-alist
-         (append
-          sasl-mechanism-alist
-          (list '("USER" sasl-pop3-user)
-                '("APOP" sasl-pop3-apop))))
-        (sasl-mechanisms
-         (append sasl-mechanisms (list "USER" "APOP")))
-        (mechanism
-           (sasl-find-mechanism auth))
-        client name step response
-        sasl-read-passphrase)
-    (unless mechanism
-      (signal 'elmo-authenticate-error '(elmo-pop3-auth-no-mechanisms)))
-    (setq client
-         (sasl-make-client
-          mechanism
-          (elmo-network-session-user-internal session)
-          "pop"
-          (elmo-network-session-host-internal session)))
+          (auth (elmo-network-session-auth-internal session))
+          (auth (mapcar '(lambda (mechanism) (upcase (symbol-name mechanism)))
+                        (if (listp auth) auth (list auth))))
+          client name step response mechanism
+          sasl-read-passphrase)
+      (or (and (string= "USER" (car auth))
+              (elmo-pop3-auth-user session))
+         (and (string= "APOP" (car auth))
+              (elmo-pop3-auth-apop session))
+         (progn
+           (setq mechanism (sasl-find-mechanism auth))
+           (unless mechanism
+             (signal 'elmo-authenticate-error '(elmo-pop3-auth-no-mechanisms)))
+           (setq client
+                 (sasl-make-client
+                  mechanism
+                  (elmo-network-session-user-internal session)
+                  "pop"
+                  (elmo-network-session-server-internal session)))
 ;;;        (if elmo-pop3-auth-user-realm
 ;;;            (sasl-client-set-property client 'realm elmo-pop3-auth-user-realm))
-    (setq name (sasl-mechanism-name mechanism)
-         step (sasl-next-step client nil))
-    (elmo-network-session-set-auth-internal session
-                                           (intern (downcase name)))
-    (setq sasl-read-passphrase
-         (function
-          (lambda (prompt)
-            (elmo-get-passwd
-             (elmo-network-session-password-key session)))))
-    (if (or (string= name "USER")
-           (string= name "APOP"))
-       (elmo-pop3-send-command
-        process
-        (format "%s %s" name
-                (sasl-step-data step)))
-      (elmo-pop3-send-command
-       process
-       (concat "AUTH " name
-              (and (sasl-step-data step)
-                   (concat 
-                    " "
-                    (elmo-base64-encode-string
-                     (sasl-step-data step) 'no-line-break))))))
-    (catch 'done
-      (while t
-       (unless (setq response (elmo-pop3-read-response process t))
-         (signal 'elmo-authenticate-error
-                 (list (intern
-                        (concat "elmo-pop3-auth-"
-                                (downcase name))))))
-       (if (string-match "^\+OK" response)
-           (if (sasl-next-step client step)
-               (signal 'elmo-authenticate-error
-                       (list (intern
-                              (concat "elmo-pop3-auth-"
-                                      (downcase name)))))
-             (throw 'done nil)))
-       (sasl-step-set-data
-        step
-        (elmo-base64-decode-string 
-         (cadr (split-string response " "))))
-       (setq step (sasl-next-step client step))
-       (elmo-pop3-send-command
-        process
-        (if (sasl-step-data step)
-            (elmo-base64-encode-string (sasl-step-data step)
-                                       'no-line-break)
-          "")))))))
+           (setq name (sasl-mechanism-name mechanism))
+           (elmo-network-session-set-auth-internal session
+                                                   (intern (downcase name)))
+           (setq sasl-read-passphrase
+                 (function
+                  (lambda (prompt)
+                    (elmo-get-passwd
+                     (elmo-network-session-password-key session)))))
+           (setq step (sasl-next-step client nil))
+           (elmo-pop3-send-command
+            process
+            (concat "AUTH " name
+                    (and (sasl-step-data step)
+                         (concat 
+                          " "
+                          (elmo-base64-encode-string
+                           (sasl-step-data step) 'no-line-break))))) ;)
+           (catch 'done
+             (while t
+               (unless (setq response (elmo-pop3-read-response process t))
+                 (signal 'elmo-authenticate-error
+                         (list (intern
+                                (concat "elmo-pop3-auth-"
+                                        (downcase name))))))
+               (if (string-match "^\+OK" response)
+                   (if (sasl-next-step client step)
+                       (signal 'elmo-authenticate-error
+                               (list (intern
+                                      (concat "elmo-pop3-auth-"
+                                              (downcase name)))))
+                     (throw 'done nil)))
+               (sasl-step-set-data
+                step
+                (elmo-base64-decode-string 
+                 (cadr (split-string response " "))))
+               (setq step (sasl-next-step client step))
+               (elmo-pop3-send-command
+                process
+                (if (sasl-step-data step)
+                    (elmo-base64-encode-string (sasl-step-data step)
+                                               'no-line-break)
+                  "")))))))))
 
 (luna-define-method elmo-network-setup-session ((session
                                                 elmo-pop3-session))
   (let ((process (elmo-network-session-process-internal session))
-       response)
+       count response)
     (with-current-buffer (process-buffer process)
-      (setq elmo-pop3-size-hash (make-vector 31 0))
+      (setq elmo-pop3-size-hash (elmo-make-hash 31))
       ;; To get obarray of uidl and size
       (elmo-pop3-send-command process "list")
       (if (null (elmo-pop3-read-response process))
-         (error "POP List folder failed"))
+         (error "POP LIST command failed"))
       (if (null (setq response
                      (elmo-pop3-read-contents
                       (current-buffer) process)))
-         (error "POP List folder failed"))
+         (error "POP LIST command failed"))
       ;; POP server always returns a sequence of serial numbers.
-      (elmo-pop3-parse-list-response response)
+      (setq count (elmo-pop3-parse-list-response response))
       ;; UIDL
-      (when elmo-pop3-use-uidl
-       (setq elmo-pop3-uidl-number-hash (make-vector 31 0))
-       (setq elmo-pop3-number-uidl-hash (make-vector 31 0))
+      (when elmo-pop3-use-uidl-internal
+       (setq elmo-pop3-uidl-number-hash (elmo-make-hash (* count 2)))
+       (setq elmo-pop3-number-uidl-hash (elmo-make-hash (* count 2)))
        ;; UIDL
        (elmo-pop3-send-command process "uidl")
        (unless (elmo-pop3-read-response process)
-         (error "UIDL failed"))
+         (error "POP UIDL failed"))
        (unless (setq response (elmo-pop3-read-contents
                                (current-buffer) process))
-         (error "UIDL failed"))
+         (error "POP UIDL failed"))
        (elmo-pop3-parse-uidl-response response)))))
 
 (defun elmo-pop3-read-contents (buffer process)
        (buffer-substring elmo-pop3-read-point
                         (- match-end 3))))))
 
-;; dummy functions
-(defun elmo-pop3-list-folders (spec &optional hierarchy) nil)
-(defun elmo-pop3-append-msg (spec string) nil nil)
-(defun elmo-pop3-folder-creatable-p (spec) nil)
-(defun elmo-pop3-create-folder (spec) nil)
+(luna-define-method elmo-folder-expand-msgdb-path ((folder elmo-pop3-folder))
+  (convert-standard-filename
+   (expand-file-name
+    (elmo-safe-filename (elmo-net-folder-user-internal folder))
+    (expand-file-name (elmo-net-folder-server-internal folder)
+                     (expand-file-name
+                      "pop"
+                      elmo-msgdb-dir)))))
 
-(defun elmo-pop3-folder-exists-p (spec)
+(luna-define-method elmo-folder-exists-p ((folder elmo-pop3-folder))
   (if (and elmo-pop3-exists-exactly
-          (elmo-pop3-plugged-p spec))
+          (elmo-folder-plugged-p folder))
       (save-excursion
-       (let (elmo-auto-change-plugged ; don't change plug status.
-             elmo-pop3-use-uidl       ; No need to use uidl.
+       (let (elmo-auto-change-plugged  ; don't change plug status.
+             elmo-pop3-inhibit-uidl    ; No need to use uidl.
              session)
          (prog1
-             (setq session (elmo-pop3-get-session spec))
+             (setq session (elmo-pop3-get-session folder))
            (if session
                (elmo-network-close-session session)))))
     t))
 
 (defun elmo-pop3-parse-list-response (string)
   (let ((buffer (current-buffer))
-       number list size)
+       (count 0)
+       alist)
     (with-temp-buffer
       (insert string)
       (goto-char (point-min))
       (while (re-search-forward "^\\([0-9]+\\)[\t ]\\([0-9]+\\)$" nil t)
-       (setq list
+       (setq alist
              (cons
-              (string-to-int (setq number (elmo-match-buffer 1)))
-              list))
-       (setq size (elmo-match-buffer 2))
-       (with-current-buffer buffer
-         (elmo-set-hash-val (concat "#" number)
-                            size
-                            elmo-pop3-size-hash)))
-      (with-current-buffer buffer (setq elmo-pop3-list-done t))
-      (nreverse list))))
-
-(defun elmo-pop3-list-location (spec)
+              (cons (elmo-match-buffer 1)
+                    (elmo-match-buffer 2))
+              alist))
+       (setq count (1+ count)))
+      (with-current-buffer buffer
+       (setq elmo-pop3-size-hash (elmo-make-hash (* (length alist) 2)))
+       (while alist
+         (elmo-set-hash-val (concat "#" (car (car alist)))
+                            (cdr (car alist))
+                            elmo-pop3-size-hash)
+         (setq alist (cdr alist)))
+       (setq elmo-pop3-list-done t))
+      count)))
+
+(defun elmo-pop3-list-location (folder)
   (with-current-buffer (process-buffer
                        (elmo-network-session-process-internal
-                        (elmo-pop3-get-session spec)))
+                        (elmo-pop3-get-session folder)))
     (let (list)
       (if elmo-pop3-uidl-done
          (progn
            (nreverse list))
        (error "POP3: Error in UIDL")))))
 
-(defun elmo-pop3-list-by-uidl-subr (spec &optional nonsort)
-  (let ((flist (elmo-list-folder-by-location
-               spec
-               (elmo-pop3-list-location spec))))
+(defun elmo-pop3-list-folder-by-location (folder locations)
+  (let* ((location-alist (elmo-pop3-folder-location-alist-internal folder))
+        (locations-in-db (mapcar 'cdr location-alist))
+        result new-locs new-alist deleted-locs i)
+    (setq new-locs
+         (elmo-delete-if (function
+                          (lambda (x) (member x locations-in-db)))
+                         locations))
+    (setq deleted-locs
+         (elmo-delete-if (function
+                          (lambda (x) (member x locations)))
+                         locations-in-db))
+    (setq i (or (elmo-max-of-list (mapcar 'car location-alist)) 0))
+    (mapcar
+     (function
+      (lambda (x)
+       (setq location-alist
+             (delq (rassoc x location-alist) location-alist))))
+     deleted-locs)
+    (while new-locs
+      (setq i (1+ i))
+      (setq new-alist (cons (cons i (car new-locs)) new-alist))
+      (setq new-locs (cdr new-locs)))
+    (setq result (nconc location-alist new-alist))
+    (setq result (sort result (lambda (x y) (< (car x)(car y)))))
+    (elmo-pop3-folder-set-location-alist-internal folder result)
+    (mapcar 'car result)))
+
+(defun elmo-pop3-list-by-uidl-subr (folder &optional nonsort)
+  (let ((flist (elmo-pop3-list-folder-by-location
+               folder
+               (elmo-pop3-list-location folder))))
     (if nonsort
        (cons (elmo-max-of-list flist) (length flist))
       (sort flist '<))))
 
-(defun elmo-pop3-list-by-list (spec)
+(defun elmo-pop3-list-by-list (folder)
   (with-current-buffer (process-buffer
                        (elmo-network-session-process-internal
-                        (elmo-pop3-get-session spec)))
+                        (elmo-pop3-get-session folder)))
     (let (list)
       (if elmo-pop3-list-done
          (progn
            (sort list '<))
        (error "POP3: Error in list")))))
 
-(defun elmo-pop3-list-folder (spec)
-  (let ((killed (and elmo-use-killed-list
-                    (elmo-msgdb-killed-list-load
-                     (elmo-msgdb-expand-path spec))))
-       numbers)
-    (elmo-pop3-commit spec)
-    (setq numbers (if elmo-pop3-use-uidl
-                     (progn
-                       (elmo-pop3-list-by-uidl-subr spec))
-                   (elmo-pop3-list-by-list spec)))
-    (elmo-living-messages numbers killed)))
-
-(defun elmo-pop3-max-of-folder (spec)
-  (elmo-pop3-commit spec)
-  (if elmo-pop3-use-uidl
-      (elmo-pop3-list-by-uidl-subr spec 'nonsort)
+(defsubst elmo-pop3-folder-list-messages (folder)
+  (if (and (not elmo-pop3-inhibit-uidl)
+          (elmo-pop3-folder-use-uidl-internal folder))
+      (elmo-pop3-list-by-uidl-subr folder)
+    (elmo-pop3-list-by-list folder)))
+
+(luna-define-method elmo-folder-list-messages-internal
+  ((folder elmo-pop3-folder))
+  (elmo-pop3-folder-list-messages folder))
+
+(luna-define-method elmo-folder-status ((folder elmo-pop3-folder))
+  (elmo-folder-check folder)
+  (if (elmo-pop3-folder-use-uidl-internal folder)
+      (elmo-pop3-list-by-uidl-subr folder 'nonsort)
     (let* ((process
            (elmo-network-session-process-internal
-            (elmo-pop3-get-session spec)))
+            (elmo-pop3-get-session folder)))
           (total 0)
           response)
       (with-current-buffer (process-buffer process)
        (replace-match "\n"))
       (copy-to-buffer tobuffer (point-min) (point-max)))))
 
-(defalias 'elmo-pop3-msgdb-create 'elmo-pop3-msgdb-create-as-numlist)
-
-(defun elmo-pop3-msgdb-create-as-numlist (spec numlist new-mark
-                                              already-mark seen-mark
-                                              important-mark seen-list
-                                              &optional msgdb)
-  (when numlist
-    (let ((process (elmo-network-session-process-internal
-                   (elmo-pop3-get-session spec)))
-         loc-alist)
-      (if elmo-pop3-use-uidl
-         (setq loc-alist (if msgdb (elmo-msgdb-get-location msgdb)
-                           (elmo-msgdb-location-load
-                            (elmo-msgdb-expand-path spec)))))
-      (elmo-pop3-msgdb-create-by-header process numlist
-                                       new-mark already-mark
-                                       seen-mark seen-list
-                                       loc-alist))))
+(luna-define-method elmo-folder-msgdb-create ((folder elmo-pop3-folder)
+                                             numlist new-mark
+                                             already-mark seen-mark
+                                             important-mark seen-list)
+  (let ((process (elmo-network-session-process-internal
+                 (elmo-pop3-get-session folder))))
+    (with-current-buffer (process-buffer process)
+      (elmo-pop3-sort-msgdb-by-original-number
+       folder
+       (elmo-pop3-msgdb-create-by-header
+       process
+       numlist
+       new-mark already-mark
+       seen-mark seen-list
+       (if (elmo-pop3-folder-use-uidl-internal folder)
+           (elmo-pop3-folder-location-alist-internal folder)))))))
+
+(defun elmo-pop3-sort-overview-by-original-number (overview loc-alist)
+  (if loc-alist
+      (sort overview
+           (lambda (ent1 ent2)
+             (< (elmo-pop3-uidl-to-number
+                 (cdr (assq (elmo-msgdb-overview-entity-get-number ent1)
+                            loc-alist)))
+                (elmo-pop3-uidl-to-number
+                 (cdr (assq (elmo-msgdb-overview-entity-get-number ent2)
+                            loc-alist))))))
+    overview))
+
+(defun elmo-pop3-sort-msgdb-by-original-number (folder msgdb)
+  (message "Sorting...")
+  (let ((overview (elmo-msgdb-get-overview msgdb)))
+    (current-buffer)
+    (setq overview (elmo-pop3-sort-overview-by-original-number
+                   overview
+                   (elmo-pop3-folder-location-alist-internal folder)))
+    (message "Sorting...done")
+    (list overview (nth 1 msgdb)(nth 2 msgdb)(nth 3 msgdb))))
 
 (defun elmo-pop3-uidl-to-number (uidl)
   (string-to-number (elmo-get-hash-val uidl
              (setq message-id (car entity))
              (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)
              (elmo-display-progress
               'elmo-pop3-msgdb-create-message "Creating msgdb..."
               (/ (* i 100) num)))))
-      (list overview number-alist mark-alist loc-alist))))
+      (list overview number-alist mark-alist))))
 
 (defun elmo-pop3-read-body (process outbuf)
   (with-current-buffer (process-buffer process)
       (setq end (point))
       (with-current-buffer outbuf
        (erase-buffer)
-       (insert-buffer-substring (process-buffer process) start (- end 3))
-       (elmo-delete-cr-get-content-type)))))
-
-(defun elmo-pop3-read-msg (spec number outbuf &optional msgdb)
-  (let* ((loc-alist (if elmo-pop3-use-uidl
-                       (if msgdb
-                           (elmo-msgdb-get-location msgdb)
-                         (elmo-msgdb-location-load
-                          (elmo-msgdb-expand-path spec)))))
+       (insert-buffer-substring (process-buffer process) start (- end 3))))))
+
+(luna-define-method elmo-folder-open-internal ((folder elmo-pop3-folder))
+  (if (elmo-pop3-folder-use-uidl-internal folder)
+      (elmo-pop3-folder-set-location-alist-internal
+       folder (elmo-msgdb-location-load (elmo-folder-msgdb-path folder)))))
+
+(luna-define-method elmo-folder-commit :after ((folder elmo-pop3-folder))
+  (when (elmo-folder-persistent-p folder)
+    (elmo-msgdb-location-save (elmo-folder-msgdb-path folder)
+                             (elmo-pop3-folder-location-alist-internal
+                              folder))))
+
+(luna-define-method elmo-folder-close-internal ((folder elmo-pop3-folder))
+  (elmo-pop3-folder-set-location-alist-internal folder nil)
+  (elmo-folder-check folder))
+
+(luna-define-method elmo-message-fetch-plugged ((folder elmo-pop3-folder)
+                                               number strategy
+                                               &optional section
+                                               outbuf unseen)
+  (let* ((loc-alist (elmo-pop3-folder-location-alist-internal folder))
         (process (elmo-network-session-process-internal
-                  (elmo-pop3-get-session spec)))
+                  (elmo-pop3-get-session folder)))
         response errmsg msg)
     (with-current-buffer (process-buffer process)
       (if loc-alist
              (error "Deleting message failed")))
        (error "Deleting message failed")))))
 
-(defun elmo-pop3-delete-msgs (spec msgs &optional msgdb)
-  (let ((loc-alist (if elmo-pop3-use-uidl
-                      (if msgdb
-                          (elmo-msgdb-get-location msgdb)
-                        (elmo-msgdb-location-load
-                         (elmo-msgdb-expand-path spec)))))
+(luna-define-method elmo-folder-delete-messages ((folder elmo-pop3-folder)
+                                                     msgs)
+  (let ((loc-alist (elmo-pop3-folder-location-alist-internal folder))
        (process (elmo-network-session-process-internal
-                 (elmo-pop3-get-session spec))))
+                 (elmo-pop3-get-session folder))))
     (mapcar '(lambda (msg) (elmo-pop3-delete-msg
                            process msg loc-alist))
            msgs)))
 
-(defun elmo-pop3-search (spec condition &optional numlist)
-  (error "Searching in pop3 folder is not implemented yet"))
-
-(defun elmo-pop3-use-cache-p (spec number)
+(luna-define-method elmo-message-use-cache-p ((folder elmo-pop3-folder) number)
   elmo-pop3-use-cache)
 
-(defun elmo-pop3-local-file-p (spec number)
-  nil)
-
-(defun elmo-pop3-port-label (spec)
-  (concat "pop3"
-         (if (elmo-pop3-spec-stream-type spec)
-             (concat "!" (symbol-name
-                          (elmo-network-stream-type-symbol
-                           (elmo-pop3-spec-stream-type spec)))))))
-
-(defsubst elmo-pop3-portinfo (spec)
-  (list (elmo-pop3-spec-hostname spec)
-       (elmo-pop3-spec-port spec)))
-
-(defun elmo-pop3-plugged-p (spec)
-  (apply 'elmo-plugged-p
-        (append (elmo-pop3-portinfo spec)
-                (list nil (quote (elmo-pop3-port-label spec))))))
-
-(defun elmo-pop3-set-plugged (spec plugged add)
-  (apply 'elmo-set-plugged plugged
-        (append (elmo-pop3-portinfo spec)
-                (list nil nil (quote (elmo-pop3-port-label spec)) add))))
-
-(defalias 'elmo-pop3-sync-number-alist
-  'elmo-generic-sync-number-alist)
-(defalias 'elmo-pop3-list-folder-unread
-  'elmo-generic-list-folder-unread)
-(defalias 'elmo-pop3-list-folder-important
-  'elmo-generic-list-folder-important)
-(defalias 'elmo-pop3-folder-diff 'elmo-generic-folder-diff)
-
-(defun elmo-pop3-commit (spec)
-  (if (elmo-pop3-plugged-p spec)
-      (let ((session (elmo-pop3-get-session spec 'if-exists)))
+(luna-define-method elmo-folder-persistent-p ((folder elmo-pop3-folder))
+  (and (elmo-folder-persistent-internal folder)
+       (elmo-pop3-folder-use-uidl-internal folder)))
+
+
+(luna-define-method elmo-folder-check ((folder elmo-pop3-folder))
+  (if (elmo-folder-plugged-p folder)
+      (let ((session (elmo-pop3-get-session folder 'if-exists)))
        (and session
             (elmo-network-close-session session)))))
-       
 
 (require 'product)
 (product-provide (provide 'elmo-pop3) (require 'elmo-version))