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/* This is a message reader/lister door for Synchronet.  Features include:
 * - Listing messages in the user's current message area with the ability to
 *   navigate forwards & backwards through the list (and for ANSI users, a
 *   lightbar interface will be used, or optionally can be set to use a more
 *   traditional interface for ANSI users)
 * - The user can select a message from the list to read and optionally reply to
 * - For ANSI users, reading messages is done with an enhanced user interface,
 *   with the ability to scroll up & down through the message, move to the next
 *   or previous message using the right & left arrow keys, display the message
 *   list to choose another message to read, etc.
 * - The ability to start up with the message list or reading messages in the
 *   user's current message area (AKA sub-board)
 * - Message searching
 *
 * Author: Eric Oulashin (AKA Nightfox)
 * BBS: Digital Distortion
 * BBS address: digitaldistortionbbs.com (or digdist.bbsindex.com)
 *
 * Date       Author            Description
 * 2014-09-13 Eric Oulashin     Started (based on my message lister script)
 * 2022-03-14 Eric Oulashin     Version 1.47
 *                              Updated to make DDMsgReader can be called directly as a
 *                              loadable module by Synchronet (work started on March 8).
 *                              Also, refactored to use attr_conv.js and removed the
 *                              attribute conversion functions from this script.
 * 2022-03-23 Eric Oulashin     Version 1.47a
 *                              Now calls bbs.edit_msg() to edit an existing message (if
 *                              that function exists - It was added in Synchronet 3.18).
 * 2022-06-12 Eric Oulashin     Version 1.48
 *                              Improved display of ANSI messages via the use of the Graphic object
 * 2022-06-13 Eric Oulashin     Version 1.49
 *                              Refactor: Simplified saving a message to BBS machine for sysop
 *                              (as-is, less processing); removed attachment stuff for pre-Synchronet
 *                              3.17; moved hasSyncAttrCodes() to attr_conv.js because that's where it
 *                              needs to be.
 * 2022-06-13 Eric Oulashin     Version 1.50
 *                              When doing a text search, it now ignores the user scan configuration for
 *                              sub-boards, to ensure it will show any results of the text search.
 *                              Graphic is now only used when using the scrollable interface. Also,
 *                              when creating the Graphic, now subtracting 1 from the reading area height
 *                              to avoid making the Graphic one line too tall to avoid unnecessary scrolling.
 *                              When saving messages with ANSI codes, Graphic is only used if the message has
 *                              any ASCII drawing characters. (not sure if this really matters much though).
 *                              Also, applied "use strict" and made some changes as necessary.
 * 2022-07-09 Eric Oulashin     Version 1.52
 *                              Mouse click support for the bottom help lines in scrollable mode
 *                              (thanks to help from Nelgin)
 * 2022-07-18 Eric Oulashin     Version 1.53
 *                              Deleted messages can now be un-marked for deletion from the message
 *                              list with the U key (if the user has delete permissions). Also, the reader now
 *                              honors the system setting for whether users can view deleted messages.
 * 2022-08-06 Eric Oulashin     Version 1.54
 *                              Users now have a personal twit list (configurable via Ctrl-U, user settings).
// TODO: In the message list, add the ability to search with / similar to my area chooser
/* Command-line arguments (in -arg=val format, or -arg format to enable an
   option):
   -search: A search type.  Available options:
            keyword_search: Do a keyword search in message subject/body text (current message area)
            from_name_search: 'From' name search (current message area)
            to_name_search: 'To' name search (current message area)
            to_user_search: To user search (current message area)
            new_msg_scan: New message scan (prompt for current sub-board, current
                          group, or all)
            new_msg_scan_all: New message scan (all sub-boards)
			new_msg_scan_cur_grp: New message scan (current message group only)
            new_msg_scan_cur_sub: New message scan (current sub-board only).  This
			                      can (optionally) be used with the -subBoard
								  command-line parameter, which specifies an internal
								  code for a sub-board, which may be different from
								  the user's currently selected sub-board.
			to_user_new_scan: Scan for new (unread) messages to the user (prompt
			                  for current sub-board, current group, or all)
			to_user_new_scan_all: Scan for new (unread) messages to the user
			                      (all sub-boards)
			to_user_new_scan_cur_grp: Scan for new (unread) messages to the user
			                          (current group)
            to_user_new_scan_cur_sub: Scan for new (unread) messages to the user
			                          (current sub-board)
			to_user_all_scan: Scan for all messages to the user (prompt for current
			                  sub-board, current group, or all)
            prompt: Prompt the user for one of several search/scan options to
                    choose from
        Note that if the -personalEmail option is specified (to read personal
        email), the only valid search types are keyword_search and
        from_name_search.
   -suppressSearchTypeText: Disable the search type text that would appear
                            above searches or scans (such as "New To You
                            Message Scan", etc.)
   -startMode: Startup mode.  Available options:
               list (or lister): Message list mode
               read (or reader): Message read mode
   -configFilename: Specifies the name of the configuration file to use.
                    Defaults to DDMsgReader.cfg.
   -personalEmail: Read personal email to the user.  This is a true/false value.
                   It doesn't need to explicitly have a =true or =false afterward;
                   simply including -personalEmail will enable it.  If this is specified,
				   the -chooseAreaFirst and -subBoard options will be ignored.
   -personalEmailSent: Read personal email to the user.  This is a true/false
                       value.  It doesn't need to explicitly have a =true or =false
                       afterward; simply including -personalEmailSent will enable it.
   -allPersonalEmail: Read all personal email (to/from all)
   -userNum: Specify a user number (for the personal email options)
   -chooseAreaFirst: Display the message area chooser before reading/listing
                     messages.  This is a true/false value.  It doesn't need
                     to explicitly have a =true or =false afterward; simply
                     including -chooseAreaFirst will enable it.  If -personalEmail
					 or -subBoard is specified, then this option won't have any
                     effect.
	-subBoard: The sub-board (internal code or number) to read, other than the user's
               current sub-board. If this is specified, the -chooseAreaFirst option
			   will be ignored.
	-verboseLogging: Enable logging to the system log & node log.  Currently, there
	                 isn't much that will be logged, but more log messages could be
					 added in the future.
*/

// - For pageUp & pageDown, enable alternate keys:
//  - When reading a message - scrollTextLines()
//  - When listing messages
//  - When listing message groups & sub-boards for sub-board selection
// - For sub-board area search:
//  - Enable searching in traditional interface
//  - Update the keys in the lightbar help line and traditional interface
// This script requires Synchronet version 3.18 or higher (for mouse hotspot support).
// Exit if the Synchronet version is below the minimum.
	var message = "\x01n\x01h\x01y\x01i* Warning:\x01n\x01h\x01w Digital Distortion Message Reader "
	             + "requires version \x01g3.18\x01w or\r\n"
	             + "higher of Synchronet.  This BBS is using version \x01g" + system.version
	             + "\x01w.  Please notify the sysop.";
	console.crlf();
	console.print(message);
	console.crlf();
	console.pause();
	exit();
}

require("sbbsdefs.js", "K_UPPER");
require("text.js", "Email"); // Text string definitions (referencing text.dat)
require("utf8_cp437.js", "utf8_cp437");
require("userdefs.js", "USER_UTF8");
require("dd_lightbar_menu.js", "DDLightbarMenu");
require("html2asc.js", 'html2asc');
require("attr_conv.js", "convertAttrsToSyncPerSysCfg");
require("graphic.js", 'Graphic');
load('822header.js');
var ansiterm = require("ansiterm_lib.js", 'expand_ctrl_a');


var READER_VERSION = "1.54";
var READER_DATE = "2022-08-06";

// Keyboard key codes for displaying on the screen
var UP_ARROW = ascii(24);
var DOWN_ARROW = ascii(25);
var LEFT_ARROW = ascii(17);
var RIGHT_ARROW = ascii(16);
// Ctrl keys for input
var CTRL_A = "\x01";
var CTRL_B = "\x02";
var CTRL_C = "\x03";
var CTRL_D = "\x04";
var CTRL_E = "\x05";
var CTRL_F = "\x06";
var CTRL_G = "\x07";
var BEEP = CTRL_G;
var CTRL_H = "\x08";
var BACKSPACE = CTRL_H;
var CTRL_I = "\x09";
var TAB = CTRL_I;
var CTRL_J = "\x0a";
var CTRL_K = "\x0b";
var CTRL_L = "\x0c";
var CTRL_M = "\x0d";
var CTRL_N = "\x0e";
var CTRL_O = "\x0f";
var CTRL_P = "\x10";
var CTRL_Q = "\x11";
var XOFF = CTRL_Q;
var CTRL_R = "\x12";
var CTRL_S = "\x13";
var XON = CTRL_S;
var CTRL_T = "\x14";
var CTRL_U = "\x15";
var CTRL_V = "\x16";
var KEY_INSERT = CTRL_V;
var CTRL_W = "\x17";
var CTRL_X = "\x18";
var CTRL_Y = "\x19";
var CTRL_Z = "\x1a";
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