#!perl
################################################################################
# WeBWorK Online Homework Delivery System
# Copyright © 2000-2003 The WeBWorK Project, http://openwebwork.sf.net/
# $CVSHeader: webwork2/conf/global.conf.dist,v 1.98 2004/08/27 21:13:22 sh002i Exp $
# 
# This program is free software; you can redistribute it and/or modify it under
# the terms of either: (a) the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any later
# version, or (b) the "Artistic License" which comes with this package.
# 
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See either the GNU General Public License or the
# Artistic License for more details.
################################################################################

# This file is used to set up the default WeBWorK course environment for all
# requests. Values may be overwritten by the course.conf for a specific course.
# All package variables set in this file are added to the course environment.
# If you wish to set a variable here but omit it from the course environment,
# use the "my" keyword. The $webwork_dir variable is set in the WeBWorK Apache
# configuration file (webwork.apache-config) and is available for use here. In
# addition, the $courseName variable holds the name of the current course.

################################################################################
# Seed variables
################################################################################

# Set these variables to correspond to your configuration and preferences. You
# will need to restart the webserver to reset the variables in this section

# URL of WeBWorK handler.
$webwork_url         = "/webwork2";

# Root directory of PG.
$pg_dir              = "/opt/pg";

# URL and path to htdocs directory.
$webwork_htdocs_url  = "/webwork2_files";
$webwork_htdocs_dir  = "$webwork_dir/htdocs";

# URL and path to courses directory.
$webwork_courses_url = "/webwork2_course_files";
$webwork_courses_dir = "$webwork_dir/courses";

################################################################################
# Paths to external programs 
################################################################################

$externalPrograms{mkdir}    = "/bin/mkdir";
$externalPrograms{mysql}    = "/usr/local/bin/mysql";

$externalPrograms{latex}    = "/usr/local/bin/latex";
$externalPrograms{pdflatex} = "/usr/local/bin/pdflatex";
$externalPrograms{dvipng}   = "/usr/local/bin/dvipng";
$externalPrograms{tth}      = "/usr/local/bin/tth";

################################################################################
# Mail settings
################################################################################

# Mail sent by the PG system and the mail merge and feedback modules will be
# sent via this SMTP server.
$mail{smtpServer}            = 'mail.yourschool.edu';

# When connecting to the above server, WeBWorK will send this address in the
# MAIL FROM command. This has nothing to do with the "From" address on the mail
# message. It can really be anything, but some mail servers require it contain
# a valid mail domain, or at least be well-formed.
$mail{smtpSender}            = 'webwork@yourserver.yourschool.edu';
	
# AllowedRecipients defines addresses that the PG system is allowed to send mail
# to. this prevents subtle PG exploits. This should be set in course.conf to the
# addresses of professors of each course. Sending mail from the PG system (i.e.
# questionaires, essay questions) will fail if this is not set somewhere (either
# here or in course.conf).
$mail{allowedRecipients}     = [
	#'prof1@yourserver.yourdomain.edu',
	#'prof2@yourserver.yourdomain.edu',
];
	
# If defined, feedbackRecipients overrides the list of recipients for feedback
# email. It's appropriate to set this in the course.conf for specific courses,
# but probably not in global.conf. if not defined, mail is sent to all
# professors and TAs for a given course
#$mail{feedbackRecipients}    = [
#	'prof1@yourserver.yourdomain.edu',
#	'prof2@yourserver.yourdomain.edu',
#];
	
# feedbackVerbosity:
#  0: send only the feedback comment and context link
#  1: as in 0, plus user, set, problem, and PG data
#  2: as in 1, plus the problem environment (debugging data)
$mail{feedbackVerbosity}     = 1;
	
# Defines the size of the Mail Merge editor window
# FIXME: should this be here? it's UI, not mail
# FIXME: replace this with the auto-size method that TWiki uses
$mail{editor_window_rows}    = 15;
$mail{editor_window_columns} = 100;

################################################################################
# System-wide locations (directories and URLs)
################################################################################

# The root directory, set by webwork_root variable in Apache configuration.
$webworkDirs{root}          = "$webwork_dir";

# Location of system-wide data files.
$webworkDirs{DATA}          = "$webworkDirs{root}/DATA";

# Used for temporary storage of uploaded files.
$webworkDirs{uploadCache}   = "$webworkDirs{DATA}/uploads";

# Location of utility programs.
$webworkDirs{bin}           = "$webworkDirs{root}/bin";

# Location of configuration files, templates, snippets, etc.
$webworkDirs{conf}          = "$webworkDirs{root}/conf";

# Location of course directories.
$webworkDirs{courses}       = "$webwork_courses_dir" || "$webworkDirs{root}/courses";

# Contains log files.
$webworkDirs{logs}          = "$webworkDirs{root}/logs";

# Contains non-web-accessible temporary files, such as TeX working directories.
$webworkDirs{tmp}           = "$webworkDirs{root}/tmp";

##### The following locations are web-accessible.

# The root URL (usually /webwork2), set by <Location> in Apache configuration.
$webworkURLs{root}          = "$webwork_url";

# Location of system-wide web-accessible files, such as equation images, and
# help files.
$webworkDirs{htdocs}        = "$webwork_htdocs_dir" || "$webworkDirs{root}/htdocs";
$webworkURLs{htdocs}        = "$webwork_htdocs_url";

# Location of web-accessible temporary files, such as equation images.
$webworkDirs{htdocs_temp}   = "$webworkDirs{htdocs}/tmp";
$webworkURLs{htdocs_temp}   = "$webworkURLs{htdocs}/tmp";

# Location of cached equation images.
$webworkDirs{equationCache} = "$webworkDirs{htdocs_temp}/equations";
$webworkURLs{equationCache} = "$webworkURLs{htdocs_temp}/equations";

# Contains context-sensitive help files.
$webworkDirs{local_help}    = "$webworkDirs{htdocs}/helpFiles";
$webworkURLs{local_help}    = "$webworkURLs{htdocs}/helpFiles";

# URL of general WeBWorK documentation.
$webworkURLs{docs}          = "http://webhost.math.rochester.edu/webworkdocs/docs";

# URL of WeBWorK 1.x profLogin.pl script, for access to old professor pages.
# Note that both systems must share a single "courses" directory for this to be
# useful. Leave this blank to disable 
$webworkURLs{oldProf}       = "/webwork1/profLogin.pl";

# URL of WeBWorK Bugzilla database.
$webworkURLs{bugReporter}   = "http://bugs.webwork.rochester.edu/";

# Location of jsMath script, used for the jsMath display mode.
$webworkURLs{jsMath}        = "$webworkURLs{htdocs}/jsMath/jsMath.js";

# Location of ASCIIMathML script, used for the asciimath display mode.
$webworkURLs{asciimath}     = "$webworkURLs{htdocs}/ASCIIMathML/ASCIIMathML.js";

################################################################################
# Defaults for course-specific locations (directories and URLs)
################################################################################

# The root directory of the current course. (The ID of the current course is
# available in $courseName.)
$courseDirs{root}        = "$webworkDirs{courses}/$courseName";

# Location of course-specific data files, such as WW1 (GDBM) database files.
$courseDirs{DATA}        = "$courseDirs{root}/DATA";

# Location of authentication data files when using a WW1 (GDBM) database.
$courseDirs{auth_DATA}   = "$courseDirs{DATA}/.auth";

# Location of course HTML files, passed to PG.
$courseDirs{html}        = "$courseDirs{root}/html";
$courseURLs{html}        = "$webwork_courses_url/$courseName";

# Location of course image files, passed to PG.
$courseDirs{html_images} = "$courseDirs{html}/images";

# Location of web-accessible, course-specific temporary files, like static and
# dynamically-generated PG graphics.
$courseDirs{html_temp}   = "$courseDirs{html}/tmp";
$courseURLs{html_temp}   = "$courseURLs{html}/tmp";

# Location of course-specific logs, like the transaction log.
$courseDirs{logs}        = "$courseDirs{root}/logs";

# Location of scoring files.
$courseDirs{scoring}     = "$courseDirs{root}/scoring";

# Location of PG templates and set definition files.
$courseDirs{templates}   = "$courseDirs{root}/templates";

# Location of course-specific macro files.
$courseDirs{macros}      = "$courseDirs{templates}/macros";

# Location of mail-merge templates.
$courseDirs{email}       = "$courseDirs{templates}/email";

################################################################################
# System-wide files
################################################################################

# Location of this file.
$webworkFiles{environment}                      = "$webworkDirs{conf}/global.conf";

# Flat-file database used to protect against MD5 hash collisions. TeX equations
# are hashed to determine the name of the image file. There is a tiny chance of
# a collision between two TeX strings. This file allows for that. However, this
# is slow, so most people chose not to worry about it. Set this to "" if you
# don't want to use the equation cache file.
$webworkFiles{equationCacheDB}                  = ""; # "$webworkDirs{DATA}/equationcache";

##### Hardcopy snippets are used in constructing a TeX file for hardcopy output.
##### They should contain TeX code unless otherwise noted.

# The preamble is the first thing in the TeX file.
$webworkFiles{hardcopySnippets}{preamble}       = "$webworkDirs{conf}/snippets/hardcopyPreamble.tex";

# The setHeader preceeds each set. It is a PG file.
$webworkFiles{hardcopySnippets}{setHeader}      = "$webworkDirs{conf}/snippets/setHeader.pg";  # hardcopySetHeader.pg",

# The problem divider goes between problems.
$webworkFiles{hardcopySnippets}{problemDivider} = "$webworkDirs{conf}/snippets/hardcopyProblemDivider.tex";

# The set footer goes after each set. Is is a PG file.
$webworkFiles{hardcopySnippets}{setFooter}      = "$webworkDirs{conf}/snippets/hardcopySetFooter.pg";

# The set divider goes between sets (in multiset output).
$webworkFiles{hardcopySnippets}{setDivider}     = "$webworkDirs{conf}/snippets/hardcopySetDivider.tex";

# The user divider does between users (in multiuser output).
$webworkFiles{hardcopySnippets}{userDivider}    = "$webworkDirs{conf}/snippets/hardcopyUserDivider.tex";

# The postabmle is the last thing in the TeX file.
$webworkFiles{hardcopySnippets}{postamble}      = "$webworkDirs{conf}/snippets/hardcopyPostamble.tex";

##### Screen snippets are used when displaying problem sets on the screen.

# The set header is displayed on the problem set page. It is a PG file.
$webworkFiles{screenSnippets}{setHeader}        = "$webworkDirs{conf}/snippets/setHeader.pg"; # screenSetHeader.pg"

################################################################################
# Course-specific files
################################################################################

# The course configuration file.
$courseFiles{environment} = "$courseDirs{root}/course.conf";

# File contents are displayed after login, on the problem sets page. Path given
# here is relative to the templates directory.
$courseFiles{course_info} = "course_info.txt";

# File contents are displayed on the login page. Path given here is relative to
# the templates directory.
$courseFiles{login_info}  = "login_info.txt";

# Additional library buttons can be added to the Library Browser (SetMaker.pm)
# by adding the libraries you want to the following line.  For each key=>value
# in the list, if a directory (or link to a directory) with name 'key' appears
# in the templates directory, then a button with name 'value' will be placed at
# the top of the problem browser.  (No button will appear if there is no
# directory or link with the given name in the templates directory.)  For
# example,
# 
#     $courseFiles{problibs} = {rochester => "Rochester", asu => "ASU"};
# 
# would add two buttons, one for the Rochester library and one for the ASU
# library, provided templates/rochester and templates/asu exists either as 
# subdirectories or links to other directories.
# 
$courseFiles{problibs}    = {
# 	rochesterLibrary => "Rochester", 
# 	asuLibrary       => "Arizona State",
# 	dcdsLibrary      => "Detroit CDS",
# 	dartmouthLibrary => "Dartmouth",
# 	indianaLibrary   => "Indiana",
# 	osuLibrary       => "Ohio State",	
};

################################################################################
# Database options
################################################################################

# Several database are defined in the file conf/database.conf and stored in the
# hash %dbLayouts.
include "conf/database.conf";

# Select the default database layout. This can be overridden in the course.conf
# file of a particular course. If you choose "gdbm", WeBWorK will be able to
# use courses from WeBWorK 1 without first adding course.conf files to them.
# However, the recommended database layout for new courses is "sql_single". This
# can be set when creating a course.
$dbLayoutName = "sql_single"; # or "gdbm" or "sql"

# This sets the symbol "dbLayout" as an alias for the selected database layout.
*dbLayout     = $dbLayouts{$dbLayoutName};

################################################################################
# Problem library options
################################################################################

# The directory containing the problem library files. Set to "" if no problem
# library is installed.
$problemLibrary{root}        = "";

# The name of the SQL database containing problem metadata
$problemLibrary{sourceSQL}   = "ProblemLibrary";

# The user name to use when connecting to the problem library database
$problemLibrary{userSQL}     = "webworkRead";

# The password to use when connecting to the problem library database
$problemLibrary{passwordSQL} = "";

################################################################################
# Logs
################################################################################

# FIXME: take logs out of %webworkFiles/%courseFiles and give them their own
# top-level hash.

# Logs data about how long it takes to process problems. (Do not confuse this
# with the /other/ timing log which can be set by WeBWorK::Timing and is used
# for benchmarking system performance in general. At some point, this timing
# mechanism will be deprecated in favor of the WeBWorK::Timing mechanism.)
$webworkFiles{logs}{timing}         = "$webworkDirs{logs}/timing.log";

# The transaction log contains data from each recorded answer submission. This
# is useful if the database becomes corrupted.
$webworkFiles{logs}{transaction}    = "$courseDirs{logs}/transaction.log";

# The answer log stores a history of all users' submitted answers.
$courseFiles{logs}{answer_log}      = "$courseDirs{logs}/answer_log";

################################################################################
# More paths to external programs 
################################################################################

# These image conversion utilities are included in the WeBWorK distribution.
$externalPrograms{gif2eps}  = "$webworkDirs{bin}/gif2eps";
$externalPrograms{png2eps}  = "$webworkDirs{bin}/png2eps";
$externalPrograms{gif2png}  = "$webworkDirs{bin}/gif2png";

################################################################################
# Site defaults (FIXME: what other things could be "site defaults"?)
################################################################################

# Status strings -- lists valid status values and their names. If your site uses
# additional values, add them here.
$siteDefaults{status} = {
	A        => "Audit",
	audit    => "Audit",
	D        => "Drop",
	drop     => "Drop",
	withdraw => "Drop",
	C        => "Enrolled",
	current  => "Enrolled",
	enrolled => "Enrolled",
};

################################################################################
# Frontend options 
################################################################################

%templates = (
	system => "$webworkDirs{conf}/templates/ur.template",
);

################################################################################
# Authorization system
################################################################################

# This lets you specify a minimum permission level needed to perform certain
# actions.  In the current system, >=10 will allow a professor to perform the
# action, >=5 will allow a TA to, and >=0 will allow a student to perform an
# action (almost never what you want).

my $student   = 0;
my $ta        = 5;
my $professor = 10;
my $nobody    = undef;

%permissionLevels = (
	report_bugs                    => $student,
	
	view_multiple_sets             => $ta,
	view_unopened_sets             => $ta,
	view_unpublished_sets          => $ta,
	view_answers                   => $ta,
	
	become_student                 => $professor,
	access_instructor_tools        => $ta,
	score_sets                     => $professor,
	send_mail                      => $professor,
	
	create_and_delete_problem_sets => $professor,
	assign_problem_sets            => $professor,
	modify_problem_sets            => $professor,
	modify_student_data            => $professor,
	
	modify_classlist_files         => $professor,
	modify_set_def_files           => $professor,
	modify_scoring_files           => $professor,
	modify_problem_template_files  => $professor,
	
	create_and_delete_courses      => $professor,
	fix_course_databases           => $professor,
	
	##### Behavior of the interactive problem processor #####
	
	show_correct_answers_before_answer_date         => $ta,
	show_solutions_before_answer_date               => $ta,
	avoid_recording_answers                         => $ta,
	
	check_answers_before_open_date                  => $ta,
	check_answers_after_open_date_with_attempts     => $ta,
	check_answers_after_open_date_without_attempts  => $student,
	check_answers_after_due_date                    => $student,
	check_answers_after_answer_date                 => $student,
	
	record_answers_when_acting_as_student           => $nobody,
	
	# "record_answers_when_acting_as_student" takes precedence
	# over the following for professors acting as students:
	record_answers_before_open_date                 => $nobody,
	record_answers_after_open_date_with_attempts    => $student,
	record_answers_after_open_date_without_attempts => $nobody,
	record_answers_after_due_date                   => $nobody,
	record_answers_after_answer_date                => $nobody,
);

################################################################################
# Session options
################################################################################

# $sessionKeyTimeout defines seconds of inactivity before a key expires
$sessionKeyTimeout = 60*30;

# $sessionKeyLength defines the length (in characters) of the session key
$sessionKeyLength = 40;

# @sessionKeyChars lists the legal session key characters
@sessionKeyChars = ('A'..'Z', 'a'..'z', '0'..'9', '.', '^', '/', '!', '*');

# Practice users are users who's names start with $practiceUser
# (you can comment this out to remove practice user support)
$practiceUserPrefix = "practice";

# There is a practice user who can be logged in multiple times.  He's
# commented out by default, though, so you don't hurt yourself.  It is
# kindof a backdoor to the practice user system, since he doesn't have a
# password.  Come to think of it, why do we even have this?!
#$debugPracticeUser = "practice666";

################################################################################
# PG subsystem options
################################################################################

# List of enabled display modes. Comment out any modes you don't wish to make
# available for use.
$pg{displayModes} = [
	"plainText",     # display raw TeX for math expressions
	"formattedText", # format math expressions using TtH
	"images",        # display math expressions as images generated by dvipng
	"jsMath",        # render TeX math expressions on the client side using jsMath
	"asciimath",     # render TeX math expressions on the client side using ASCIIMathML
];

#### Default settings for the PG translator

# Default display mode. Should be listed above.
$pg{options}{displayMode}        = "images";

# The default grader to use, if a problem doesn't specify.
$pg{options}{grader}             = "avg_problem_grader";

# Fill in answer blanks with the student's last answer by default?
$pg{options}{showOldAnswers}     = 1;

# Show correct answers (when allowed) by default?
$pg{options}{showCorrectAnswers} = 0;

# Show hints (when allowed) by default?
$pg{options}{showHints}          = 0;

# Show solutions (when allowed) by default?
$pg{options}{showSolutions}      = 0;

# Catch translation warnings internally by default? (We no longer need to do
# this, since there is a global warnings handler. So this should be off.)
$pg{options}{catchWarnings}      = 0;

##### Currently-selected renderer

# Only the local renderer is supported in this version.
$pg{renderer} = "WeBWorK::PG::Local";

# The remote renderer connects to an XML-RPC PG rendering server.
#$pg{renderer} = "WeBWorK::PG::Remote"'

##### Renderer-dependent options

# The remote renderer has one option:
$pg{renderers}{"WeBWorK::PG::Remote"} = {
	# The "proxy" server to connect to for remote rendering.
	proxy => "http://localhost:21000/RenderD",
};

##### Settings for various display modes

# "images" mode has several settings:
$pg{displayModeOptions}{images} = {
	# Determines the method used to align images in output. Can be
	# "baseline", "absmiddle", or "mysql".
	dvipng_align => 'baseline', 

	# If we choose mysql, we need information on connecting to the
	# database. Whatever you use here, you have to create the database
	# and grant read/write priveleges to the user listed here. To create
	# the database in mysql, as root use:
	# 
	#     CREATE DATABASE DvipngDepths;
	#     USE DvipngDepths;
	#     CREATE TABLE depths (md5 CHAR(33) NOT NULL, depth SMALLINT, PRIMARY KEY (md5));
	#     GRANT ALL ON DvipngDepths.* TO webworkWrite;
	# 
	# In the last statement, "webworkWrite" should match the user below.
	dvipng_depth_db => {
		dbsource => 'dbi:mysql:DvipngDepths',
		user     => $dbLayouts{sql}->{password}->{params}->{usernameRW},
		passwd   => $dbLayouts{sql}->{password}->{params}->{passwordRW},
	},
};

##### Directories used by PG

# The root of the PG directory tree (from pg_root in Apache config).
$pg{directories}{root}   = "$pg_dir";
$pg{directories}{lib}    = "$pg{directories}{root}/lib";
$pg{directories}{macros} = "$pg{directories}{root}/macros";

##### "Special" PG environment variables. (Stuff that doesn't fit in anywhere else.)

# Users for whom to print the file name of the PG file being processed.
$pg{specialPGEnvironmentVars}{PRINT_FILE_NAMES_FOR} = [ "professor", ];

# Locations of CAPA resources. (Only necessary if you need to use converted CAPA
# problems.)
$pg{specialPGEnvironmentVars}{CAPA_Tools}             = "$courseDirs{macros}/CAPA_Tools/", 
$pg{specialPGEnvironmentVars}{CAPA_MCTools}           = "$courseDirs{macros}/CAPA_MCTools/",  
$pg{specialPGEnvironmentVars}{CAPA_GraphicsDirectory} = "$courseDirs{html}/CAPA_Graphics/", 
$pg{specialPGEnvironmentVars}{CAPA_Graphics_URL}      = "$courseURLs{html}/CAPA_Graphics/",   

# Size in pixels of dynamically-generated images, i.e. graphs.
$pg{specialPGEnvironmentVars}{onTheFlyImageSize}      = 400,

##### PG modules to load

# The first item of each list is the module to load. The remaining items are
# additional packages to import.

${pg}{modules} = [
	[qw(DynaLoader)],
	[qw(Exporter)],
	[qw(GD)],
	
	[qw(AlgParser AlgParserWithImplicitExpand Expr ExprWithImplicitExpand)],
	[qw(AnswerHash AnswerEvaluator)],
	[qw(WWPlot)], # required by Circle (and others)
	[qw(Circle)],
	[qw(Complex)],
	[qw(Complex1)],
	[qw(Distributions)],
	[qw(Fraction)],
	[qw(Fun)],
	[qw(Hermite)],
	[qw(Label)],
	[qw(List)],
	[qw(Match)],
	[qw(MatrixReal1)], # required by Matrix
	[qw(Matrix)],
	[qw(Multiple)],
	[qw(PGrandom)],
	[qw(Regression)],
	[qw(Select)],
	[qw(Units)],
	[qw(VectorField)],
	[qw(Parser Value)],
];

##### Answer evaluatior defaults

$pg{ansEvalDefaults} = {
	functAbsTolDefault            => .001,
	functLLimitDefault            => .0000001,
	functMaxConstantOfIntegration => 1E8,
	functNumOfPoints              => 3,
	functRelPercentTolDefault     => .1,
	functULimitDefault            => .9999999,
	functVarDefault               => "x",
	functZeroLevelDefault         => 1E-14,
	functZeroLevelTolDefault      => 1E-12,
	numAbsTolDefault              => .001,
	numFormatDefault              => "",
	numRelPercentTolDefault       => .1,
	numZeroLevelDefault           => 1E-14,
	numZeroLevelTolDefault        => 1E-12,
	useBaseTenLog                 => 0,
	defaultDisplayMatrixStyle     => "[s]",
};

################################################################################
# Compatibility
################################################################################

# Define the old names for the various "root" variables.
$webworkRoot    = $webworkDirs{root};
$webworkURLRoot = $webworkURLs{root};
$pgRoot         = $pg{directories}{root};