DDMsgReader.js

/* 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)
 * ... Comments trimmed ...
 * 2020-04-03 Eric Oulashin     Version 1.29
 *                              When reading a message, if a message is written to the
 *                              current user, the 'To' username in the header above
 *                              the message is now written in a different color.
 * 2020-04-07 Eric Oulashin     Version 1.30
 *                              The message list features now uses DDLightbarMenu
 *                              rather than the internal lightbar chooser code.
 *                              Later I also plan to update the area chooser code
 *                              to use DDLightbarMenu as well and remove the
 *                              internal lightbar chooser code altogether.
 * 2020-04-13 Eric Oulashin     Version 1.31
 *                              The area change feature now uses DDLightbarMenu.
 *                              There is no more internal lightbar code in this
 *                              message reader.
 * 2020-04-19 Eric Oulashin     Version 1.32
 *                              Removed some code that's no longer used.  Also,
 *                              fixed an issue when changing to another sub-board
 *                              with the traditional-style (non-lightbar) list
 *                              where it was slow to list sub-boards.  For the number
 *                              of messages, it was checking all headers to ignore
 *                              ones marked as deleted, etc., but that can be
 *                              fairly slow..  Now it just uses total_msgs for the
 *                              MessageBase object, which is a lot faster and still
 *                              gives an idea of how many messages are there.
 * 2020-04-21 Eric Oulashin     Version 1.33
 *                              Fixed: A new user starting to read messages in
 *                              a sub-board no longer causes an error (it checks
 *                              for the scan_ptr being 0xffffffff).  This had
 *                              been fixed in a couple places previously, but
 *                              apparently not this particular case.
 * 2020-05-11 Eric Oulashin     Version 1.34
 *                              The message list mode now honors anonymous posts,
 *                              showing the 'from' name as "Anonymous" (for non-sysops).
 *                              The sysop can still see the real name of the poster.
 * 2020-05-13 Eric Oulashin     Version 1.35
 *                              Fixed some logic in determining how to address
 *                              a personal email when replying (either to a local
 *                              user or via their network address).
 * 2020-05-23 Eric Oulashin     Version 1.36
 *                              Added a command-line parameter, -onlyNewPersonalEmail,
 *                              which specifies to list/read only new/unread personal
 *                              email to the user.  And for integration with Synchronet
 *                              via the "Read Email" loadable module, this is to
 *                              be used together with the updated DDReadPersonalEmail.js.
 * 2020-07-11 Eric Oulashin     Version 1.37
 *                              Added mouse support to the scrollable reader interface.
 *                              The integrated area changer functionality doesn't have mouse
 *                              support yet.
 * 2020-11-26 Eric Oulashin     Verison 1.38
 *                              Bug fix: When forwarding a message, it now correctly
 *                              sets the to_net_type property in the message header to
 *                              FidoNet or internet for those types of message destinations
 * 2020-12-01 Eric Oulashin     Version 1.39
 *                              When forwarding a message, added the ability to
 *                              optionally edit the message before forwarding it.
 * 2021-01-31 Michael Long      Version 1.40
 *                              Fixed left/right colors not being customizable on message
 *                              list lightbar
 * 2021-02-12 Eric Oulashin     Version 1.41
 *                              Bug fix: When changing to another area with the lightbar
 *                              interface, if the user's current sub-board is a high-numbered
 *                              sub-board and they select a message group with fewer
 *                              sub-boards, the highlighted sub-board in that group would
 *                              be set to that high number and would be incorrect.
 *                              That has been fixed.  Copied a fix from my stand-alone
 *                              message area chooser.  In that scenario, the current
 *                              highlighted sub-board in the other group will be
 *                              the first one.
 * 2021-03-15 Eric Oulashin     Version 1.42 Beta
 *                              Started working on converting HTML entities in
 *                              HTML-formatted messages.
 * 2021-08-02                   Added the ability to sort the message list by date
 *                              & time written rather than the import date/time.
 *                              This is specified in the configuration file via the
 *                              msgListSort option.
 * 2022-01-13 Eric Oulashin     Version 1.42
 *                              Fixed attachment downloading.
 * 2022-02-10 Eric Oulashin     Version 1.43
 *                              Fixed the memory error when viewing message header info
 *                              (I had used the same loop control variable name for a loop
 *                              inside a loop..oops).  Also, added a check to the header
 *                              properties so that it won't display JS functions when viewing
 *                              the message header information.
 * 2022-02-15 Eric Oulashin     Version 1.44 Beta
 *                              Removed the scanScopePromptText text line and used
 *                              the SubGroupOrAll line (621) from text.dat instead.
 *                              Updated to support @-codes in configured text strings.
 *                              Also, started working on making text search support
 *                              sub-board, group, or all like the other text searching.
 *                              When reading the theme file, color settings are now checked
 *                              to ensure they only have Synchronet attribute codes.
 * 2022-02-19 Eric Oulashin     Version 1.44
 *                              Releasing this version.
 * 2022-02-24 Eric Oulashin     Version 1.45
 *                              Fixed message scanning & searching issue introduced in the
 *                              previous version.
 * 2022-02-25 Eric Oulashin     Version 1.45b
 *                              Fixed message list time colors for wide terminals (above 80 columns)
 */


/* 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.
*/

// TODOs:
// - Search in text: Support current sub-board, group, or all searching
// - Make use of these lines from text.dat?
// "\1n\1c(\1h%u \1n\1csub-boards)\1h\1w complete.\r\n"           117 MessageScanComplete
// "\1r\1iaborted.\1n\r\n"                                    118 MessageScanAborted

// - 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

const requireFnExists = (typeof(require) === "function");

if (requireFnExists)
{
	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("mouse_getkey.js", "mouse_getkey");
	require("html2asc.js", 'html2asc');
}
else
{
	load("sbbsdefs.js");
	load("text.js"); // Text string definitions (referencing text.dat)
	load("utf8_cp437.js");
	load("userdefs.js");
	load("dd_lightbar_menu.js");
	load("mouse_getkey.js");
	load("html2asc.js");
}
load('822header.js');


// This script requires Synchronet version 3.15 or higher.
// Exit if the Synchronet version is below the minimum.
if (system.version_num < 31500)
{
	var message = "\1n\1h\1y\1i* Warning:\1n\1h\1w Digital Distortion Message Reader "
	             + "requires version \1g3.15\1w or\r\n"
	             + "higher of Synchronet.  This BBS is using version \1g" + system.version
	             + "\1w.  Please notify the sysop.";
	console.crlf();
	console.print(message);
	console.crlf();
	console.pause();
	exit();
}

// Reader version information
var READER_VERSION = "1.45b";
var READER_DATE = "2022-02-25";

// 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";
//var KEY_ESC = "\x1b";
var KEY_ESC = ascii(27);
var KEY_ENTER = CTRL_M;
// PageUp & PageDown keys - Synchronet 3.17 as of about December 18, 2017
// use CTRL-P and CTRL-N for PageUp and PageDown, respectively.  sbbsdefs.js
// defines them as KEY_PAGEUP and KEY_PAGEDN; I've used slightly different names
// in this script so that this script will work with Synchronet systems before
// and after the update containing those key definitions.
var KEY_PAGE_UP = CTRL_P;
var KEY_PAGE_DOWN = CTRL_N;
// Ensure KEY_PAGE_UP and KEY_PAGE_DOWN are set to what's defined in sbbs.js
// for KEY_PAGEUP and KEY_PAGEDN in case they change
if (typeof(KEY_PAGEUP) === "string")
	KEY_PAGE_UP = KEY_PAGEUP;
if (typeof(KEY_PAGEDN) === "string")
	KEY_PAGE_DOWN = KEY_PAGEDN;
	
// These are defined in sbbsdefs.js:
//var	  KEY_UP		='\x1e';	// ctrl-^ (up arrow)
//var	  KEY_DOWN		='\x0a';	// ctrl-j (dn arrow)
//var   KEY_RIGHT		='\x06';	// ctrl-f (rt arrow)
//var	  KEY_LEFT		='\x1d';	// ctrl-] (lf arrow)
//var	  KEY_HOME		='\x02';	// ctrl-b (home)
//var   KEY_END       ='\x05';	// ctrl-e (end)
//var   KEY_DEL       ='\x7f';    // (del)
// These were added to sbbsdef.js around December 17, 2017:
//var		KEY_PAGEUP	='\x10';	/* ctrl-p (Page Up)							*/
//var		KEY_PAGEDN	='\x0e';	/* ctrl-n (Page Down)						*/

// Characters for display
// Box-drawing/border characters: Single-line
var UPPER_LEFT_SINGLE = "\xDA";
var HORIZONTAL_SINGLE = "\xC4";
var UPPER_RIGHT_SINGLE = "\xBF";
var VERTICAL_SINGLE = "\xB3";
var LOWER_LEFT_SINGLE = "\xC0";
var LOWER_RIGHT_SINGLE = "\xD9";
var T_SINGLE = "\xC2";
var LEFT_T_SINGLE = "\xC3";
var RIGHT_T_SINGLE = "\xB4";
var BOTTOM_T_SINGLE = "\xC1";
var CROSS_SINGLE = "\xC5";
// Box-drawing/border characters: Double-line
var UPPER_LEFT_DOUBLE = "\xC9";
var HORIZONTAL_DOUBLE = "\xCD";
var UPPER_RIGHT_DOUBLE = "\xBB";
var VERTICAL_DOUBLE = "\xBA";
var LOWER_LEFT_DOUBLE = "\xC8";
var LOWER_RIGHT_DOUBLE = "\xBC";
var T_DOUBLE = "\xCB";
var LEFT_T_DOUBLE = "\xCC";
var RIGHT_T_DOUBLE = "\xB9";
var BOTTOM_T_DOUBLE = "\xCA";
var CROSS_DOUBLE = "\xCE";
// Box-drawing/border characters: Vertical single-line with horizontal double-line
var UPPER_LEFT_VSINGLE_HDOUBLE = "\xD5";
var UPPER_RIGHT_VSINGLE_HDOUBLE = "\xB8";
var LOWER_LEFT_VSINGLE_HDOUBLE = "\xD4";
var LOWER_RIGHT_VSINGLE_HDOUBLE = "\xBE";
// Other special characters
var DOT_CHAR = "\xF9";
var CHECK_CHAR = "\xFB";
var THIN_RECTANGLE_LEFT = "\xDD";
var THIN_RECTANGLE_RIGHT = "\xDE";
var BLOCK1 = "\xB0"; // Dimmest block
var BLOCK2 = "\xB1";
var BLOCK3 = "\xB2";
var BLOCK4 = "\xDB"; // Brightest block


const ERROR_PAUSE_WAIT_MS = 1500;

// Store whether or not the Synchronet compile date is at least May 12, 2013
// so that we don't have to call compileDateAtLeast2013_05_12() multiple times.
var gSyncCompileDateAtLeast2013_05_12 = compileDateAtLeast2013_05_12();
// Reader mode definitions:
const READER_MODE_LIST = 0;
const READER_MODE_READ = 1;
// Search types
const SEARCH_NONE = -1;
const SEARCH_KEYWORD = 2;
const SEARCH_FROM_NAME = 3;
const SEARCH_TO_NAME_CUR_MSG_AREA = 4;
const SEARCH_TO_USER_CUR_MSG_AREA = 5;
const SEARCH_MSG_NEWSCAN = 6;
const SEARCH_MSG_NEWSCAN_CUR_SUB = 7;
const SEARCH_MSG_NEWSCAN_CUR_GRP = 8;
const SEARCH_MSG_NEWSCAN_ALL = 9;
const SEARCH_TO_USER_NEW_SCAN = 10;
const SEARCH_TO_USER_NEW_SCAN_CUR_SUB = 11;
const SEARCH_TO_USER_NEW_SCAN_CUR_GRP = 12;
const SEARCH_TO_USER_NEW_SCAN_ALL = 13;
const SEARCH_ALL_TO_USER_SCAN = 14;

// Message threading types
const THREAD_BY_ID = 15;
const THREAD_BY_TITLE = 16;
const THREAD_BY_AUTHOR = 17;
const THREAD_BY_TO_USER = 18;

// Reader mode - Actions
const ACTION_NONE = 19;
const ACTION_GO_NEXT_MSG = 20;
const ACTION_GO_PREVIOUS_MSG = 21;
const ACTION_GO_SPECIFIC_MSG = 22;
const ACTION_GO_FIRST_MSG = 23;
const ACTION_GO_LAST_MSG = 24;
const ACTION_DISPLAY_MSG_LIST = 25;
const ACTION_CHG_MSG_AREA = 26;
const ACTION_GO_PREV_MSG_AREA = 27;
const ACTION_GO_NEXT_MSG_AREA = 28;
const ACTION_QUIT = 29;

// Definitions for help line refresh parameters for error functions
const REFRESH_MSG_AREA_CHG_LIGHTBAR_HELP_LINE = 0;

// Message list sort types
const MSG_LIST_SORT_DATETIME_RECEIVED = 0;
const MSG_LIST_SORT_DATETIME_WRITTEN = 1;

// Misc. defines
var ERROR_WAIT_MS = 1500;
var SEARCH_TIMEOUT_MS = 10000;

// Strings for the various message attributes (used by makeAllAttrStr(),
// makeMainMsgAttrStr(), makeAuxMsgAttrStr(), and makeNetMsgAttrStr())
var gMainMsgAttrStrs = {
	MSG_DELETE: "Del",
	MSG_PRIVATE: "Priv",
	MSG_READ: "Read",
	MSG_PERMANENT: "Perm",
	MSG_LOCKED: "Lock",
	MSG_ANONYMOUS: "Anon",
	MSG_KILLREAD: "Killread",
	MSG_MODERATED: "Mod",
	MSG_VALIDATED: "Valid",
	MSG_REPLIED: "Repl",
	MSG_NOREPLY: "NoRepl"
};
var gAuxMsgAttrStrs = {
	MSG_FILEREQUEST: "Freq",
	MSG_FILEATTACH: "Attach",
	MSG_KILLFILE: "KillFile",
	MSG_RECEIPTREQ: "RctReq",
	MSG_CONFIRMREQ: "ConfReq",
	MSG_NODISP: "NoDisp"
};
if (typeof(MSG_TRUNCFILE) != "undefined")
	gAuxMsgAttrStrs.MSG_TRUNCFILE = "TruncFile";
var gNetMsgAttrStrs = {
	MSG_LOCAL: "FromLocal",
	MSG_INTRANSIT: "Transit",
	MSG_SENT: "Sent",
	MSG_KILLSENT: "KillSent",
	MSG_ARCHIVESENT: "ArcSent",
	MSG_HOLD: "Hold",
	MSG_CRASH: "Crash",
	MSG_IMMEDIATE: "Now",
	MSG_DIRECT: "Direct"
};
if (typeof(MSG_GATE) != "undefined")
	gNetMsgAttrStrs.MSG_GATE = "Gate";
if (typeof(MSG_ORPHAN) != "undefined")
	gNetMsgAttrStrs.MSG_ORPHAN = "Orphan";
if (typeof(MSG_FPU) != "undefined")
	gNetMsgAttrStrs.MSG_FPU = "FPU";
if (typeof(MSG_TYPELOCAL) != "undefined")
	gNetMsgAttrStrs.MSG_TYPELOCAL = "ForLocal";
if (typeof(MSG_TYPEECHO) != "undefined")
	gNetMsgAttrStrs.MSG_TYPEECHO = "ForEcho";
if (typeof(MSG_TYPENET) != "undefined")
	gNetMsgAttrStrs.MSG_TYPENET = "ForNetmail";
if (typeof(MSG_MIMEATTACH) != "undefined")
	gNetMsgAttrStrs.MSG_MIMEATTACH = "MimeAttach";

// A regular expression to check whether a string is an email address
var gEmailRegex = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
// A regular expression to check whether a string is a FidoNet email address
var gFTNEmailregex = /^.*@[0-9]+:[0-9]+\/[0-9]+$/;
// An array of regular expressions for checking for ANSI codes (globally in a string & ignore case)
var gANSIRegexes = [ new RegExp(ascii(27) + "\[[0-9]+[mM]", "gi"),
                     new RegExp(ascii(27) + "\[[0-9]+(;[0-9]+)+[mM]", "gi"),
                     new RegExp(ascii(27) + "\[[0-9]+[aAbBcCdD]", "gi"),
                     new RegExp(ascii(27) + "\[[0-9]+;[0-9]+[hHfF]", "gi"),
                     new RegExp(ascii(27) + "\[[sSuUkK]", "gi"),
                     new RegExp(ascii(27) + "\[2[jJ]", "gi") ];

// Determine the script's startup directory.
// This code is a trick that was created by Deuce, suggested by Rob Swindell
// as a way to detect which directory the script was executed in.  I've
// shortened the code a little.
var gStartupPath = '.';
try { throw dig.dist(dist); } catch(e) { gStartupPath = e.fileName; }
gStartupPath = backslash(gStartupPath.replace(/[\/\\][^\/\\]*$/,''));

// See if we're running in Windows or not.  Until early 2015, the word_wrap()
// function seemed to have a bug where the wrapping length in Linux was one
// less than what it uses in Windows).  That seemed to be fixed in one of the
// Synchronet 3.16 builds in early 2015.
var gRunningInWindows = /^WIN/.test(system.platform.toUpperCase());

// Temporary directory (in the logged-in user's node directory) to store
// file attachments, etc.
var gFileAttachDir = backslash(system.node_dir + "DDMsgReader_Attachments");
// If the temporary attachments directory exists, then delete it (in case the last
// user hung up while running this script, etc.)
if (file_exists(gFileAttachDir))
	deltree(gFileAttachDir);

// See if frame.js and scrollbar.js exist in sbbs/exec/load on the BBS machine.
// If so, load them.  They will be used for displaying messages with ANSI content
// with a scrollable user interface.
var gFrameJSAvailable = file_exists(backslash(system.exec_dir) + "load/frame.js");
if (gFrameJSAvailable)
{
	if (requireFnExists)
		require("frame.js", "Frame");
	else
		load("frame.js");
}
var gScrollbarJSAvailable = file_exists(backslash(system.exec_dir) + "load/scrollbar.js");
if (gScrollbarJSAvailable)
{
	if (requireFnExists)
		require("scrollbar.js", "ScrollBar");
	else
		load("scrollbar.js");
}
// See if the avatar support files are available, and load them if so
var gAvatar = null;
if (file_exists(backslash(system.exec_dir) + "load/smbdefs.js") && file_exists(backslash(system.exec_dir) + "load/avatar_lib.js"))
{
	if (requireFnExists)
		require("smbdefs.js", "SMB_POLL_ANSWER");
	else
		load("smbdefs.js");
	gAvatar = load({}, "avatar_lib.js");
}

/////////////////////////////////////////////
// Script execution code

// Parse the command-line arguments

var gCmdLineArgVals = parseArgs(argv);
var gAllPersonalEmailOptSpecified = (gCmdLineArgVals.hasOwnProperty("allpersonalemail") && gCmdLineArgVals.allpersonalemail);
// Check to see if the command-line argument for reading personal email is enabled
var gListPersonalEmailCmdLineOpt = ((gCmdLineArgVals.hasOwnProperty("personalemail") && gCmdLineArgVals.personalemail) ||
                                    (gCmdLineArgVals.hasOwnProperty("personalemailsent") && gCmdLineArgVals.personalemailsent) ||
									gAllPersonalEmailOptSpecified);
// If the command-line parameter "search" is specified as "prompt", then
// prompt the user for the type of search to perform.
var gDoDDMR = true; // If the user doesn't choose a search type, this will be set to false
if (gCmdLineArgVals.hasOwnProperty("search") && (gCmdLineArgVals["search"].toLowerCase() == "prompt"))
{
	console.print("\1n");
	console.crlf();
	console.print("\1cMessage search:");
	console.crlf();
	var allowedKeys = "";
	if (!gListPersonalEmailCmdLineOpt)
	{
		allowedKeys = "ANKFTYUS";
		console.print(" \1g\1hN\1y = \1n\1cNew message scan");
		console.crlf();
		console.print(" \1g\1hK\1y = \1n\1cKeyword");
		console.crlf();
		console.print(" \1h\1gF\1y = \1n\1cFrom name");
		console.crlf();
		console.print(" \1h\1gT\1y = \1n\1cTo name");
		console.crlf();
		console.print(" \1h\1gY\1y = \1n\1cTo you");
		console.crlf();
		console.print(" \1h\1gU\1y = \1n\1cUnread (new) messages to you");
		console.crlf();
		console.print(" \1h\1gS\1y = \1n\1cScan for msgs to you");
		console.crlf();
	}
	else
	{
		// Reading personal email - Allow fewer choices
		allowedKeys = "KF";
		console.print(" \1g\1hK\1y = \1n\1cKeyword");
		console.crlf();
		console.print(" \1h\1gF\1y = \1n\1cFrom name");
		console.crlf();
	}
	console.print(" \1h\1gA\1y = \1n\1cAbort");
	console.crlf();
	console.print("\1n\1cMake a selection\1g\1h: \1c");
	// TODO: Check to see if keyword & from name search work when reading
	// personal email
	switch (console.getkeys(allowedKeys))
	{
		case "N":
			gCmdLineArgVals["search"] = "new_msg_scan";
			break;
		case "K":
			gCmdLineArgVals["search"] = "keyword_search";
			break;
		case "F":
			gCmdLineArgVals["search"] = "from_name_search";
			break;
		case "T":
			gCmdLineArgVals["search"] = "to_name_search";
			break;
		case "Y":
			gCmdLineArgVals["search"] = "to_user_search";
			break;
		case "U":
			gCmdLineArgVals["search"] = "to_user_new_scan";
			break;
		case "S":
			gCmdLineArgVals["search"] = "to_user_all_scan";
			break;
		case "A": // Abort
		default:
			gDoDDMR = false;
			console.print("\1n\1h\1y\1iAborted\1n");
			console.crlf();
			console.pause();
			break;
	}
}

if (gDoDDMR)
{
	// Create an instance of the DigDistMsgReader class and use it to read/list the
	// messages in the user's current sub-board.  Pass the parsed command-line
	// argument values object to its constructor.
	var readerSubCode = (gListPersonalEmailCmdLineOpt ? "mail" : bbs.cursub_code);
	// If the -subBoard option was specified and the "read personal email" option was
	// not specified, then use the sub-board specified by the -subBoard command-line
	// option.
	if (gCmdLineArgVals.hasOwnProperty("subboard") && !gListPersonalEmailCmdLineOpt)
	{
		// If the specified sub-board option is all digits, then treat it as the
		// sub-board number.  Otherwise, treat it as an internal sub-board code.
		if (/^[0-9]+$/.test(gCmdLineArgVals["subboard"]))
			readerSubCode = getSubBoardCodeFromNum(Number(gCmdLineArgVals["subboard"]));
		else
			readerSubCode = gCmdLineArgVals["subboard"];
	}
	var msgReader = new DigDistMsgReader(readerSubCode, gCmdLineArgVals);
	// If the option to choose a message area first was enabled on the command-line
	// (and neither the -subBoard nor the -personalEmail options were specified),
	// then let the user choose a sub-board now.
	if (gCmdLineArgVals.hasOwnProperty("chooseareafirst") && gCmdLineArgVals["chooseareafirst"] && !gCmdLineArgVals.hasOwnProperty("subboard") && !gListPersonalEmailCmdLineOpt)
		msgReader.SelectMsgArea();
	// Back up the user's current sub-board so that we can change back
	// to it after searching is done, if a search is done.
	var originalMsgGrpIdx = bbs.curgrp;
	var originalSubBoardIdx = bbs.cursub;
	var restoreOriginalSubCode = true;
	// Based on the reader's start mode/search type, do the appropriate thing.
	switch (msgReader.searchType)
	{
		case SEARCH_NONE:
			restoreOriginalSubCode = false;
			msgReader.ReadOrListSubBoard();
			break;
		case SEARCH_KEYWORD:
			msgReader.SearchMsgScan("keyword_search");
			break;
		case SEARCH_FROM_NAME:
			msgReader.SearchMessages("from_name_search");
			break;
		case SEARCH_TO_NAME_CUR_MSG_AREA:
			msgReader.SearchMessages("to_name_search");
			break;
		case SEARCH_TO_USER_CUR_MSG_AREA:
			msgReader.SearchMessages("to_user_search");
			break;
		case SEARCH_MSG_NEWSCAN:
			if (!gCmdLineArgVals.suppresssearchtypetext)
			{
				console.crlf();
				console.print(replaceAtCodesInStr(msgReader.text.newMsgScanText));
				console.crlf();
			}
			msgReader.MessageAreaScan(SCAN_CFG_NEW, SCAN_NEW);
			break;
		case SEARCH_MSG_NEWSCAN_CUR_SUB:
			msgReader.MessageAreaScan(SCAN_CFG_NEW, SCAN_NEW, "S");
			break;
		case SEARCH_MSG_NEWSCAN_CUR_GRP:
			msgReader.MessageAreaScan(SCAN_CFG_NEW, SCAN_NEW, "G");
			break;
		case SEARCH_MSG_NEWSCAN_ALL:
			msgReader.MessageAreaScan(SCAN_CFG_NEW, SCAN_NEW, "A");
			break;
		case SEARCH_TO_USER_NEW_SCAN:
			if (!gCmdLineArgVals.suppresssearchtypetext)
			{
				console.crlf();
				console.print(replaceAtCodesInStr(msgReader.text.newToYouMsgScanText));
				console.crlf();
			}
			msgReader.MessageAreaScan(SCAN_CFG_TOYOU/*SCAN_CFG_YONLY*/, SCAN_UNREAD);
			break;
		case SEARCH_TO_USER_NEW_SCAN_CUR_SUB:
			msgReader.MessageAreaScan(SCAN_CFG_TOYOU/*SCAN_CFG_YONLY*/, SCAN_UNREAD, "S");
			break;
		case SEARCH_TO_USER_NEW_SCAN_CUR_GRP:
			msgReader.MessageAreaScan(SCAN_CFG_TOYOU/*SCAN_CFG_YONLY*/, SCAN_UNREAD, "G");
			break;
		case SEARCH_TO_USER_NEW_SCAN_ALL:
			msgReader.MessageAreaScan(SCAN_CFG_TOYOU/*SCAN_CFG_YONLY*/, SCAN_UNREAD, "A");
			break;
		case SEARCH_ALL_TO_USER_SCAN:
			if (!gCmdLineArgVals.suppresssearchtypetext)
			{
				console.crlf();
				console.print(replaceAtCodesInStr(msgReader.text.allToYouMsgScanText));
				console.crlf();
			}
			msgReader.MessageAreaScan(SCAN_CFG_TOYOU, SCAN_TOYOU);
			break;
	}

	// If we should restore the user's original message area, then do so.
	if (restoreOriginalSubCode)
	{
		bbs.cursub = 0;
		bbs.curgrp = originalMsgGrpIdx;
		bbs.cursub = originalSubBoardIdx;
	}

	// Remove the temporary attachments & ANSI temp directories if they exists
	deltree(gFileAttachDir);
	deltree(backslash(system.node_dir + "DDMsgReaderANSIMsgTemp"));

	// Before this script finishes, make sure the terminal attributes are set back
	// to normal (in case there are any attributes left on, such as background,
	// blink, etc.)
	console.print("\1n");
	if (console.term_supports(USER_ANSI))
		console.print("");
}

// End of script execution.  Functions below:

// Generates an internal enhanced reader header line for the 'To' user.
//
// Parameters:
//  pColors: A JSON object containing the color settings read from the
//           theme configuration file.  This function will use the
//           'msgHdrToColor' or 'msgHdrToUserColor' property, depending
//           on the pToReadingUser property.
//  pToReadingUser: Boolean - Whether or not to generate the line with
//                  the color/attribute for the reading user
//
// Return value: A string containing the internal enhanced reader header
//               line specifying the 'to' user
function genEnhHdrToUserLine(pColors, pToReadingUser)
{
	var toHdrLine = "\1n\1h\1k" + VERTICAL_SINGLE + BLOCK1 + BLOCK2 + BLOCK3
		          + "\1gT\1n\1go  \1h\1c: " +
		          (pToReadingUser ? pColors.msgHdrToUserColor : pColors.msgHdrToColor) +
		          "@MSG_TO-L";
	var numChars = console.screen_columns - 21;
	for (var i = 0; i < numChars; ++i)
		toHdrLine += "#";
	toHdrLine += "@\1k" + VERTICAL_SINGLE;
	return toHdrLine;
}

///////////////////////////////////////////////////////////////////////////////////
// DigDistMsgReader class stuff

// DigDistMsgReader class constructor: Constructs a
// DigDistMsgReader object, to be used for listing messages
// in a message area.
//
// Parameters:
//  pSubBoardCode: Optional - The Synchronet sub-board code, or "mail"
//                 for personal email.
//  pScriptArgs: Optional - An object containing key/value pairs representing
//               the command-line arguments & values, as returned by parseArgs().
function DigDistMsgReader(pSubBoardCode, pScriptArgs)
{
	// Set the methods for the object
	this.setSubBoardCode = DigDistMsgReader_SetSubBoardCode;
	this.RecalcMsgListWidthsAndFormatStrs = DigDistMsgReader_RecalcMsgListWidthsAndFormatStrs;
	this.NumMessages = DigDistMsgReader_NumMessages;
	this.SearchingAndResultObjsDefinedForCurSub = DigDistMsgReader_SearchingAndResultObjsDefinedForCurSub;
	this.PopulateHdrsForCurrentSubBoard = DigDistMsgReader_PopulateHdrsForCurrentSubBoard;
	this.FilterMsgHdrsIntoHdrsForCurrentSubBoard = DigDistMsgReader_FilterMsgHdrsIntoHdrsForCurrentSubBoard;
	this.GetMsgIdx = DigDistMsgReader_GetMsgIdx;
	this.RefreshSearchResultMsgHdr = DigDistMsgReader_RefreshSearchResultMsgHdr;   // Refreshes a message header in the search results
	this.SearchMessages = DigDistMsgReader_SearchMessages; // Prompts the user for search text, then lists/reads messages, performing the search
	this.SearchMsgScan = DigDistMsgReader_SearchMsgScan;
	this.RefreshHdrInSubBoardHdrs = DigDistMsgReader_RefreshHdrInSubBoardHdrs;
	this.RefreshHdrInSavedArrays = DigDistMsgReader_RefreshHdrInSavedArrays;
	this.ReadMessages = DigDistMsgReader_ReadMessages;
	this.DisplayEnhancedMsgReadHelpLine = DigDistMsgReader_DisplayEnhancedMsgReadHelpLine;
	this.GoToPrevSubBoardForEnhReader = DigDistMsgReader_GoToPrevSubBoardForEnhReader;
	this.GoToNextSubBoardForEnhReader = DigDistMsgReader_GoToNextSubBoardForEnhReader;
	this.SetUpTraditionalMsgListVars = DigDistMsgReader_SetUpTraditionalMsgListVars;
	this.SetUpLightbarMsgListVars = DigDistMsgReader_SetUpLightbarMsgListVars;
	this.ListMessages = DigDistMsgReader_ListMessages;
	this.ListMessages_Traditional = DigDistMsgReader_ListMessages_Traditional;
	this.ListMessages_Lightbar = DigDistMsgReader_ListMessages_Lightbar;
	this.CreateLightbarMsgListMenu = DigDistMsgReader_CreateLightbarMsgListMenu;
	this.CreateLightbarMsgGrpMenu = DigDistMsgReader_CreateLightbarMsgGrpMenu;
	this.CreateLightbarSubBoardMenu = DigDistMsgReader_CreateLightbarSubBoardMenu;
	this.AdjustLightbarMsgListMenuIdxes = DigDistMsgReader_AdjustLightbarMsgListMenuIdxes;
	this.ClearSearchData = DigDistMsgReader_ClearSearchData;
	this.ReadOrListSubBoard = DigDistMsgReader_ReadOrListSubBoard;
	this.PopulateHdrsIfSearch_DispErrorIfNoMsgs = DigDistMsgReader_PopulateHdrsIfSearch_DispErrorIfNoMsgs;
	this.SearchTypePopulatesSearchResults = DigDistMsgReader_SearchTypePopulatesSearchResults;
	this.SearchTypeRequiresSearchText = DigDistMsgReader_SearchTypeRequiresSearchText;
	this.MessageAreaScan = DigDistMsgReader_MessageAreaScan;
	this.PromptContinueOrReadMsg = DigDistMsgReader_PromptContinueOrReadMsg;
	this.WriteMsgListScreenTopHeader = DigDistMsgReader_WriteMsgListScreenTopHeader;
	this.ReadMessageEnhanced = DigDistMsgReader_ReadMessageEnhanced;
	this.ReadMessageEnhanced_Scrollable = DigDistMsgReader_ReadMessageEnhanced_Scrollable;
	this.ScrollReaderDetermineClickCoordAction = DigDistMsgReader_ScrollReaderDetermineClickCoordAction;
	this.ReadMessageEnhanced_Traditional = DigDistMsgReader_ReadMessageEnhanced_Traditional;
	this.EnhReaderPrepLast2LinesForPrompt = DigDistMsgReader_EnhReaderPrepLast2LinesForPrompt;
	this.LookForNextOrPriorNonDeletedMsg = DigDistMsgReader_LookForNextOrPriorNonDeletedMsg;
	this.PrintMessageInfo = DigDistMsgReader_PrintMessageInfo;
	this.ListScreenfulOfMessages = DigDistMsgReader_ListScreenfulOfMessages;
	this.DisplayMsgListHelp = DigDistMsgReader_DisplayMsgListHelp;
	this.DisplayTraditionalMsgListHelp = DigDistMsgReader_DisplayTraditionalMsgListHelp;
	this.DisplayLightbarMsgListHelp = DigDistMsgReader_DisplayLightbarMsgListHelp;
	this.DisplayMessageListNotesHelp = DigDistMsgReader_DisplayMessageListNotesHelp;
	this.SetMsgListPauseTextAndLightbarHelpLine = DigDistMsgReader_SetMsgListPauseTextAndLightbarHelpLine;
	this.SetEnhancedReaderHelpLine = DigDistMsgReader_SetEnhancedReaderHelpLine;
	this.EditExistingMsg = DigDistMsgReader_EditExistingMsg;
	this.CanDelete = DigDistMsgReader_CanDelete;
	this.CanDeleteLastMsg = DigDistMsgReader_CanDeleteLastMsg;
	this.CanEdit = DigDistMsgReader_CanEdit;
	this.CanQuote = DigDistMsgReader_CanQuote;
	this.ReadConfigFile = DigDistMsgReader_ReadConfigFile;
	this.DisplaySyncMsgHeader = DigDistMsgReader_DisplaySyncMsgHeader;
	this.GetMsgHdrFilenameFull = DigDistMsgReader_GetMsgHdrFilenameFull;
	this.GetMsgHdrByIdx = DigDistMsgReader_GetMsgHdrByIdx;
	this.GetMsgHdrByMsgNum = DigDistMsgReader_GetMsgHdrByMsgNum;
	this.GetMsgHdrByAbsoluteNum = DigDistMsgReader_GetMsgHdrByAbsoluteNum;
	this.AbsMsgNumToIdx = DigDistMsgReader_AbsMsgNumToIdx;
	this.IdxToAbsMsgNum = DigDistMsgReader_IdxToAbsMsgNum;
	this.NonDeletedMessagesExist = DigDistMsgReader_NonDeletedMessagesExist;
	this.HighestMessageNum = DigDistMsgReader_HighestMessageNum;
	this.IsValidMessageNum = DigDistMsgReader_IsValidMessageNum;
	this.PromptForMsgNum = DigDistMsgReader_PromptForMsgNum;
	this.ParseMsgAtCodes = DigDistMsgReader_ParseMsgAtCodes;
	this.ReplaceMsgAtCodeFormatStr = DigDistMsgReader_ReplaceMsgAtCodeFormatStr;
	this.FindNextNonDeletedMsgIdx = DigDistMsgReader_FindNextNonDeletedMsgIdx;
	this.ChangeSubBoard = DigDistMsgReader_ChangeSubBoard;
	this.EnhancedReaderChangeSubBoard = DigDistMsgReader_EnhancedReaderChangeSubBoard;
	this.ReplyToMsg = DigDistMsgReader_ReplyToMsg;
	this.DoPrivateReply = DigDistMsgReader_DoPrivateReply;
	this.DisplayEnhancedReaderHelp = DigDistMsgReader_DisplayEnhancedReaderHelp;
	this.DisplayEnhancedMsgHdr = DigDistMsgReader_DisplayEnhancedMsgHdr;
	this.DisplayAreaChgHdr = DigDistMsgReader_DisplayAreaChgHdr;
	this.DisplayEnhancedReaderWholeScrollbar = DigDistMsgReader_DisplayEnhancedReaderWholeScrollbar;
	this.UpdateEnhancedReaderScollbar = DigDistMsgReader_UpdateEnhancedReaderScollbar;
	this.MessageIsDeleted = DigDistMsgReader_MessageIsDeleted;
	this.MessageIsLastFromUser = DigDistMsgReader_MessageIsLastFromUser;
	this.DisplayEnhReaderError = DigDistMsgReader_DisplayEnhReaderError;
	this.EnhReaderPromptYesNo = DigDistMsgReader_EnhReaderPromptYesNo;
	this.PromptAndDeleteMessage = DigDistMsgReader_PromptAndDeleteMessage;
	this.PromptAndDeleteSelectedMessages = DigDistMsgReader_PromptAndDeleteSelectedMessages;
	this.GetExtdMsgHdrInfo = DigDistMsgReader_GetExtdMsgHdrInfo;
	this.GetMsgInfoForEnhancedReader = DigDistMsgReader_GetMsgInfoForEnhancedReader;
	this.GetLastReadMsgIdxAndNum = DigDistMsgReader_GetLastReadMsgIdxAndNum;
	this.GetScanPtrMsgIdx = DigDistMsgReader_GetScanPtrMsgIdx;
	this.RemoveFromSearchResults = DigDistMsgReader_RemoveFromSearchResults;
	this.FindThreadNextOffset = DigDistMsgReader_FindThreadNextOffset;
	this.FindThreadPrevOffset = DigDistMsgReader_FindThreadPrevOffset;
	this.SaveMsgToFile = DigDistMsgReader_SaveMsgToFile;
	this.ToggleSelectedMessage = DigDistMsgReader_ToggleSelectedMessage;
	this.MessageIsSelected = DigDistMsgReader_MessageIsSelected;
	this.AllSelectedMessagesCanBeDeleted = DigDistMsgReader_AllSelectedMessagesCanBeDeleted;
	this.DeleteSelectedMessages = DigDistMsgReader_DeleteSelectedMessages;
	this.NumSelectedMessages = DigDistMsgReader_NumSelectedMessages;
	this.ForwardMessage = DigDistMsgReader_ForwardMessage;
	this.VoteOnMessage = DigDistMsgReader_VoteOnMessage;
	this.HasUserVotedOnMsg = DigDistMsgReader_HasUserVotedOnMsg;
	this.GetUpvoteAndDownvoteInfo = DigDistMsgReader_GetUpvoteAndDownvoteInfo;
	this.GetMsgBody = DigDistMsgReader_GetMsgBody;
	this.RefreshMsgHdrInArrays = DigDistMsgReader_RefreshMsgHdrInArrays;
	this.WriteLightbarKeyHelpErrorMsg = DigDistMsgReader_WriteLightbarKeyHelpErrorMsg;

	// startMode specifies the mode for the reader to start in - List mode
	// or reader mode, etc.  This is a setting that is read from the configuration
	// file.  The configuration file can be either READER_MODE_READ or
	// READER_MODE_LIST, but the optional "mode" parameter in the command-line
	// arguments can specify another mode.
	this.startMode = READER_MODE_LIST;

	// hdrsForCurrentSubBoard is an array that will be populated with the
	// message headers for the current sub-board.
	this.hdrsForCurrentSubBoard = [];
	// hdrsForCurrentSubBoardByMsgNum is an object that maps absolute message numbers
	// to their index to hdrsForCurrentSubBoard
	this.hdrsForCurrentSubBoardByMsgNum = {};

	// msgSearchHdrs is an object containing message headers found via searching.
	// It is indexed by internal message area code.  Each internal code index
	// will specify an object containing the following properties:
	//  indexed: A standard 0-based array containing message headers
	this.msgSearchHdrs = {};
	this.searchString = ""; // To be used for message searching
	// this.searchType will specify the type of search:
	//  SEARCH_NONE (-1): No search
	//  SEARCH_KEYWORD: Keyword search in message subject & body
	//  SEARCH_FROM_NAME: Search by 'from' name
	//  SEARCH_TO_NAME_CUR_MSG_AREA: Search by 'to' name
	//  SEARCH_TO_USER_CUR_MSG_AREA: Search by 'to' name, to the current user
	//  SEARCH_MSG_NEWSCAN: New (unread) message scan (prompt the user for sub, group, or all)
	//  SEARCH_MSG_NEWSCAN_CUR_SUB: New (unread) message scan (current sub-board)
	//  SEARCH_MSG_NEWSCAN_CUR_GRP: New (unread) message scan (current message group)
	//  SEARCH_MSG_NEWSCAN_ALL: New (unread) message scan (all message sub-boards)
	//  SEARCH_TO_USER_NEW_SCAN: New (unread) messages to the current user (prompt the user for sub, group, or all)
	//  SEARCH_TO_USER_NEW_SCAN_CUR_SUB: New (unread) messages to the current user (current sub-board)
	//  SEARCH_TO_USER_NEW_SCAN_CUR_GRP: New (unread) messages to the current user (current group)
	//  SEARCH_TO_USER_NEW_SCAN_ALL: New (unread) messages to the current user (all sub-board)
	//  SEARCH_ALL_TO_USER_SCAN: All messages to the current user
	this.searchType = SEARCH_NONE;
	this.doingMsgScan = false; // Set to true in MessageAreaScan()

	this.subBoardCode = bbs.cursub_code; // The message sub-board code
	this.readingPersonalEmail = false;

	// this.colors will be an array of colors to use in the message list
	this.colors = getDefaultColors();
	this.readingPersonalEmailFromUser = false;
	if (typeof(pSubBoardCode) == "string")
	{
		var subCodeLowerCase = pSubBoardCode.toLowerCase();
		if (subBoardCodeIsValid(subCodeLowerCase))
		{
			this.setSubBoardCode(subCodeLowerCase);
			if (gCmdLineArgVals.hasOwnProperty("personalemailsent") && gCmdLineArgVals.personalemailsent)
				this.readingPersonalEmailFromUser = true;
		}
	}

	// This property controls whether or not the user will be prompted to
	// continue listing messages after selecting a message to read.  Only for
	// regular reading, not for newscans etc.
	this.promptToContinueListingMessages = false;
	// Whether or not to prompt the user to confirm to read a message
	this.promptToReadMessage = false;
	// For enhanced reader mode (reading only, not for newscan, etc.): Whether or
	// not to ask the user whether to post on the sub-board in reader mode after
	// reading the last message instead of prompting to go to the next sub-board.
	// This is like the stock Synchronet behavior.
	this.readingPostOnSubBoardInsteadOfGoToNext = false;

	// String lengths for the columns to write
	// Fixed field widths: Message number, date, and time
	// TODO: It might be good to figure out the longest message number for a
	// sub-board and set the message number length dynamically.  It would have
	// to change whenever the user changes to a different sub-board, and the
	// message list format string would have to change too.
	//this.MSGNUM_LEN = 4;
	this.MSGNUM_LEN = 5;
	this.DATE_LEN = 10; // i.e., YYYY-MM-DD
	this.TIME_LEN = 8;  // i.e., HH:MM:SS
	// Variable field widths: From, to, and subject
	this.FROM_LEN = (console.screen_columns * (15/console.screen_columns)).toFixed(0);
	this.TO_LEN = (console.screen_columns * (15/console.screen_columns)).toFixed(0);
	var colsLeftForSubject = console.screen_columns-this.MSGNUM_LEN-this.DATE_LEN-this.TIME_LEN-this.FROM_LEN-this.TO_LEN-6; // 6 to account for the spaces
	this.SUBJ_LEN = (console.screen_columns * (colsLeftForSubject/console.screen_columns)).toFixed(0);
	// For showing message scores in the message list
	this.SCORE_LEN = 4;
	// Whether or not to show message scores in the message list: Only if the terminal
	// is at least 86 characters wide and if vote functions exist in the running build
	// of Synchronet
	this.showScoresInMsgList = ((console.screen_columns >= 86) && (typeof((new MsgBase("mail")).vote_msg) === "function"));

	// Whether or not the user chose to read a message
	this.readAMessage = false;
	// Whether or not the user denied confirmation to read a message
	this.deniedReadingMessage = false;

	// msgListUseLightbarListInterface specifies whether or not to use the lightbar
	// interface for the message list.  The lightbar interface will only be used if
	// the user's terminal supports ANSI.
	this.msgListUseLightbarListInterface = true;

	// Whether or not to use the scrolling interface when reading a message
	// (will only be used for ANSI terminals).
	this.scrollingReaderInterface = true;

	// reverseListOrder stores whether or not to arrange the message list descending
	// by date.
	this.reverseListOrder = false;

	// displayBoardInfoInHeader specifies whether or not to display
	// the message group and sub-board lines in the header at the
	// top of the screen (an additional 2 lines).
	this.displayBoardInfoInHeader = false;

	// msgList_displayMessageDateImported specifies whether or not to use the
	// message import date as the date displayed in the message list.  If false,
	// the message written date will be displayed.
	this.msgList_displayMessageDateImported = true;

	// The number of spaces to use for tab characters - Used in the
	// extended read mode
	this.numTabSpaces = 3;

	// Things for mouse support
	this.mouseTimeout = 0; // Timeout in ms.  Currently using 0 for no timeout.
	this.mouseEnabled = false; // To pass to mouse_getkey

	// this.text is an object containing text used for various prompts & functions.
	this.text = {
		scrollbarBGChar: BLOCK1,
		scrollbarScrollBlockChar: BLOCK2,
		goToPrevMsgAreaPromptText: "\1n\1c\1hGo to the previous message area",
		goToNextMsgAreaPromptText: "\1n\1c\1hGo to the next message area",
		newMsgScanText: "\1c\1hN\1n\1cew \1hM\1n\1cessage \1hS\1n\1ccan",
		newToYouMsgScanText: "\1c\1hN\1n\1cew \1hT\1n\1co \1hY\1n\1cou \1hM\1n\1cessage \1hS\1n\1ccan",
		allToYouMsgScanText: "\1c\1hA\1n\1cll \1hM\1n\1cessages \1hT\1n\1co \1hY\1n\1cou \1hS\1n\1ccan",
		goToMsgNumPromptText: "\1n\1cGo to message # (or \1hENTER\1n\1c to cancel)\1g\1h: \1c",