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214 lines
8.5 KiB
EmacsLisp
214 lines
8.5 KiB
EmacsLisp
;;; erc-capab.el --- support for dancer-ircd and hyperion's CAPAB
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;; Copyright (C) 2006-2018 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file defines the ERC module `erc-capab-identify', which allows
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;; flagging of unidentified users on servers running dancer-ircd or
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;; hyperion. freenode.net supports this capability, for example.
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;; With CAPAB IDENTIFY-MSG and IDENTIFY-CTCP enabled, messages from
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;; users who have identified themselves to NickServ will have a plus
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;; sign and messages from unidentified users will have a minus sign
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;; added as a prefix. Note that it is not necessary for your nickname
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;; to be identified in order to receive these marked messages.
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;; The plus or minus sign is removed from the message, and a prefix,
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;; `erc-capab-identify-prefix', is inserted in the front of the user's
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;; nickname if the nickname is not identified.
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;; Please note that once this has been enabled on a server, there is no
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;; way to tell the server to stop sending marked messages. If you
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;; disable this module, it will continue removing message flags, but the
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;; unidentified nickname prefix will not be added to messages.
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;; Visit <http://freenode.net/faq.shtml#spoofing> and
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;; <http://freenode.net/faq.shtml#registering> to find further
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;; explanations of this capability.
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;; From freenode.net's web site (not there anymore) on how to mark
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;; unidentified users:
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;; "We recommend that you add an asterisk before the nick, and
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;; optionally either highlight or colorize the line in some
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;; appropriate fashion, if the user is not identified."
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;;; Usage:
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;; Put the following in your init file.
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;; (require 'erc-capab)
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;; (erc-capab-identify-mode 1)
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;; `erc-capab-identify-prefix' will now be added to the beginning of
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;; unidentified users' nicknames. The default is an asterisk, "*".
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;; You can customize the prefix and the face used to display it,
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;; `erc-capab-identify-unidentified'. If the value of
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;; `erc-capab-identify-prefix' is nil or you disable this module (see
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;; `erc-capab-identify-disable'), no prefix will be inserted, but the
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;; flag sent by the server will still be stripped.
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;;; Code:
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(require 'erc)
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;;; Customization:
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(defgroup erc-capab nil
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"Support for dancer-ircd's CAPAB settings."
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:group 'erc)
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(defcustom erc-capab-identify-prefix "*"
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"The prefix used for unidentified users.
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If you change this from the default \"*\", be sure to use a
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character not found in IRC nicknames to avoid confusion."
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:group 'erc-capab
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:type '(choice string (const nil)))
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(defface erc-capab-identify-unidentified '((t)) ; same as `erc-default-face'
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"Face to use for `erc-capab-identify-prefix'."
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:group 'erc-capab
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:group 'erc-faces)
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;;; Define module:
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;;;###autoload(autoload 'erc-capab-identify-mode "erc-capab" nil t)
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(define-erc-module capab-identify nil
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"Handle dancer-ircd's CAPAB IDENTIFY-MSG and IDENTIFY-CTCP."
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;; append so that `erc-server-parameters' is already set by `erc-server-005'
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((add-hook 'erc-server-005-functions 'erc-capab-identify-setup t)
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(add-hook 'erc-server-290-functions 'erc-capab-identify-activate)
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(add-hook 'erc-server-PRIVMSG-functions
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'erc-capab-identify-remove/set-identified-flag)
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(add-hook 'erc-server-NOTICE-functions
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'erc-capab-identify-remove/set-identified-flag)
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(add-hook 'erc-insert-modify-hook 'erc-capab-identify-add-prefix t)
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(mapc (lambda (buffer)
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(when buffer
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(with-current-buffer buffer (erc-capab-identify-setup))))
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(erc-buffer-list 'erc-open-server-buffer-p)))
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((remove-hook 'erc-server-005-functions 'erc-capab-identify-setup)
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(remove-hook 'erc-server-290-functions 'erc-capab-identify-activate)
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;; we don't remove the `erc-capab-identify-remove/set-identified-flag' hooks
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;; because there doesn't seem to be a way to tell the server to turn it off
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(remove-hook 'erc-insert-modify-hook 'erc-capab-identify-add-prefix)))
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;;; Variables:
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(defvar erc-capab-identify-activated nil
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"CAPAB IDENTIFY-MSG has been activated.")
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(make-variable-buffer-local 'erc-capab-identify-activated)
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(defvar erc-capab-identify-sent nil
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"CAPAB IDENTIFY-MSG and IDENTIFY-CTCP messages have been sent.")
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(make-variable-buffer-local 'erc-capab-identify-sent)
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;;; Functions:
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(defun erc-capab-identify-setup (&optional proc parsed)
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"Set up CAPAB IDENTIFY on the current server.
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Optional argument PROC is the current server's process.
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Optional argument PARSED is the current message, a response struct.
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These arguments are sent to this function when called as a hook in
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`erc-server-005-functions'."
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(unless erc-capab-identify-sent
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(erc-capab-identify-send-messages)))
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(defun erc-capab-identify-send-messages ()
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"Send CAPAB IDENTIFY messages if the server supports it."
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(when (and (stringp erc-server-version)
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(string-match "^\\(dancer-ircd\\|hyperion\\)" erc-server-version)
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;; could possibly check for '("IRCD" . "dancer") in
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;; `erc-server-parameters' instead of looking for a specific name
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;; in `erc-server-version'
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(assoc "CAPAB" erc-server-parameters))
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(erc-log "Sending CAPAB IDENTIFY-MSG and IDENTIFY-CTCP")
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(erc-server-send "CAPAB IDENTIFY-MSG")
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(erc-server-send "CAPAB IDENTIFY-CTCP")
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(setq erc-capab-identify-sent t)))
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(defun erc-capab-identify-activate (proc parsed)
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"Set `erc-capab-identify-activated' and display an activation message.
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PROC is the current server's process.
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PARSED is an `erc-parsed' response struct."
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(when (or (string= "IDENTIFY-MSG" (erc-response.contents parsed))
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(string= "IDENTIFY-CTCP" (erc-response.contents parsed)))
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(setq erc-capab-identify-activated t)
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(erc-display-message
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parsed 'notice 'active (format "%s activated"
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(erc-response.contents parsed)))))
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(defun erc-capab-identify-remove/set-identified-flag (proc parsed)
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"Remove PARSED message's id flag and add the `erc-identified' text property.
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PROC is the current server's process.
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PARSED is an `erc-parsed' response struct."
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(let ((msg (erc-response.contents parsed)))
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(when (and erc-capab-identify-activated
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(string-match "^\\([-\\+]\\)\\(.+\\)$" msg))
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(setf (erc-response.contents parsed)
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(if erc-capab-identify-mode
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(erc-propertize (match-string 2 msg)
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'erc-identified
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(if (string= (match-string 1 msg) "+")
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1
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0))
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(match-string 2 msg)))
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nil)))
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(defun erc-capab-identify-add-prefix ()
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"Add `erc-capab-identify-prefix' to nickname if user is unidentified."
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(when (and erc-capab-identify-prefix
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(erc-with-server-buffer erc-capab-identify-activated))
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(goto-char (or (erc-find-parsed-property) (point-min)))
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(let ((nickname (erc-capab-identify-get-unidentified-nickname
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(erc-get-parsed-vector (point)))))
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(when (and nickname
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(goto-char (point-min))
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;; assuming the first use of `nickname' is the sender's nick
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(re-search-forward (regexp-quote nickname) nil t))
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(goto-char (match-beginning 0))
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(insert (erc-propertize erc-capab-identify-prefix
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'font-lock-face
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'erc-capab-identify-unidentified))))))
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(defun erc-capab-identify-get-unidentified-nickname (parsed)
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"Return the nickname of the user if unidentified.
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PARSED is an `erc-parsed' response struct."
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(when (and (erc-response-p parsed)
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(equal 0 (get-text-property 0 'erc-identified
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(erc-response.contents parsed))))
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(let ((nickuserhost (erc-get-parsed-vector-nick parsed)))
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(when nickuserhost
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(nth 0 (erc-parse-user nickuserhost))))))
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(provide 'erc-capab)
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;;; erc-capab.el ends here
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;; Local Variables:
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;; generated-autoload-file: "erc-loaddefs.el"
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;; End:
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