#!/usr/bin/env perl -wT
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): Myk Melez <myk@mozilla.org>
#                 Frédéric Buclin <LpSolit@gmail.com>

################################################################################
# Script Initialization
################################################################################

# Make it harder for us to do dangerous things in Perl.
use strict;
use lib qw(. lib);

# Use Bugzilla's flag modules for handling flag types.
use Bugzilla;
use Bugzilla::Constants;
use Bugzilla::Flag;
use Bugzilla::FlagType;
use Bugzilla::Group;
use Bugzilla::Util;
use Bugzilla::Error;
use Bugzilla::Product;
use Bugzilla::Component;
use Bugzilla::Bug;
use Bugzilla::Attachment;
use Bugzilla::Token;

local our $cgi = Bugzilla->cgi;
local our $template = Bugzilla->template;
local our $vars = {};

# Make sure the user is logged in and is an administrator.
my $user = Bugzilla->login(LOGIN_REQUIRED);
$user->in_group('editcomponents')
  || ThrowUserError("auth_failure", {group  => "editcomponents",
                                     action => "edit",
                                     object => "flagtypes"});

################################################################################
# Main Body Execution
################################################################################

# All calls to this script should contain an "action" variable whose value
# determines what the user wants to do.  The code below checks the value of
# that variable and runs the appropriate code.

# Determine whether to use the action specified by the user or the default.
my $action = $cgi->param('action') || 'list';
my $token  = $cgi->param('token');
my @categoryActions;

if (@categoryActions = grep(/^categoryAction-.+/, $cgi->param())) {
    $categoryActions[0] =~ s/^categoryAction-//;
    processCategoryChange($categoryActions[0], $token);
    exit;
}

if    ($action eq 'list')           { list();           }
elsif ($action eq 'enter')          { edit($action);    }
elsif ($action eq 'copy')           { edit($action);    }
elsif ($action eq 'edit')           { edit($action);    }
elsif ($action eq 'insert')         { insert($token);   }
elsif ($action eq 'update')         { update($token);   }
elsif ($action eq 'confirmdelete')  { confirmDelete();  } 
elsif ($action eq 'delete')         { deleteType($token); }
elsif ($action eq 'deactivate')     { deactivate($token); }
else { 
    ThrowCodeError("action_unrecognized", { action => $action });
}

exit;

################################################################################
# Functions
################################################################################

sub list {
    # Restrict the list to the given product and component, if given.
    $vars = get_products_and_components($vars);

    my $product = validateProduct(scalar $cgi->param('product'));
    my $component = validateComponent($product, scalar $cgi->param('component'));
    my $product_id = $product ? $product->id : 0;
    my $component_id = $component ? $component->id : 0;

    # Define the variables and functions that will be passed to the UI template.
    $vars->{'selected_product'} = $cgi->param('product');
    $vars->{'selected_component'} = $cgi->param('component');

    my $bug_flagtypes;
    my $attach_flagtypes;

    # If a component is given, restrict the list to flag types available
    # for this component.
    if ($component) {
        $bug_flagtypes = $component->flag_types->{'bug'};
        $attach_flagtypes = $component->flag_types->{'attachment'};

        # Filter flag types if a group ID is given.
        $bug_flagtypes = filter_group($bug_flagtypes);
        $attach_flagtypes = filter_group($attach_flagtypes);

    }
    # If only a product is specified but no component, then restrict the list
    # to flag types available in at least one component of that product.
    elsif ($product) {
        $bug_flagtypes = $product->flag_types->{'bug'};
        $attach_flagtypes = $product->flag_types->{'attachment'};

        # Filter flag types if a group ID is given.
        $bug_flagtypes = filter_group($bug_flagtypes);
        $attach_flagtypes = filter_group($attach_flagtypes);
    }
    # If no product is given, then show all flag types available.
    else {
        $bug_flagtypes =
            Bugzilla::FlagType::match({'target_type' => 'bug',
                                       'group' => scalar $cgi->param('group')});

        $attach_flagtypes =
            Bugzilla::FlagType::match({'target_type' => 'attachment',
                                         'group' => scalar $cgi->param('group')});
    }

    $vars->{'bug_types'} = $bug_flagtypes;
    $vars->{'attachment_types'} = $attach_flagtypes;

    # Return the appropriate HTTP response headers.
    print $cgi->header();

    # Generate and return the UI (HTML page) from the appropriate template.
    $template->process("admin/flag-type/list.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}


sub edit {
    my ($action) = @_;

    my $flag_type;
    if ($action eq 'enter') {
        validateTargetType();
    }
    else {
        $flag_type = validateID();
    }

    # Fill $vars with products and components data.
    $vars = get_products_and_components($vars);

    $vars->{'last_action'} = $cgi->param('action');
    if ($cgi->param('action') eq 'enter' || $cgi->param('action') eq 'copy') {
        $vars->{'action'} = "insert";
        $vars->{'token'} = issue_session_token('add_flagtype');
    }
    else { 
        $vars->{'action'} = "update";
        $vars->{'token'} = issue_session_token('edit_flagtype');
    }

    # If copying or editing an existing flag type, retrieve it.
    if ($cgi->param('action') eq 'copy' || $cgi->param('action') eq 'edit') { 
        $vars->{'type'} = $flag_type;
    }
    # Otherwise set the target type (the minimal information about the type
    # that the template needs to know) from the URL parameter and default
    # the list of inclusions to all categories.
    else {
        my %inclusions;
        $inclusions{"__Any__:__Any__"} = "0:0";
        $vars->{'type'} = { 'target_type' => scalar $cgi->param('target_type'),
                            'inclusions'  => \%inclusions };
    }
    # Get a list of groups available to restrict this flag type against.
    my @groups = Bugzilla::Group->get_all;
    $vars->{'groups'} = \@groups;
    # Return the appropriate HTTP response headers.
    print $cgi->header();

    # Generate and return the UI (HTML page) from the appropriate template.
    $template->process("admin/flag-type/edit.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}

sub processCategoryChange {
    my ($categoryAction, $token) = @_;
    validateIsActive();
    validateIsRequestable();
    validateIsRequesteeble();
    validateAllowMultiple();
    
    my @inclusions = $cgi->param('inclusions');
    my @exclusions = $cgi->param('exclusions');
    if ($categoryAction eq 'include') {
        my $product = validateProduct(scalar $cgi->param('product'));
        my $component = validateComponent($product, scalar $cgi->param('component'));
        my $category = ($product ? $product->id : 0) . ":" .
                       ($component ? $component->id : 0);
        push(@inclusions, $category) unless grep($_ eq $category, @inclusions);
    }
    elsif ($categoryAction eq 'exclude') {
        my $product = validateProduct(scalar $cgi->param('product'));
        my $component = validateComponent($product, scalar $cgi->param('component'));
        my $category = ($product ? $product->id : 0) . ":" .
                       ($component ? $component->id : 0);
        push(@exclusions, $category) unless grep($_ eq $category, @exclusions);
    }
    elsif ($categoryAction eq 'removeInclusion') {
        my @inclusion_to_remove = $cgi->param('inclusion_to_remove');
        @inclusions = map {(lsearch(\@inclusion_to_remove, $_) < 0) ? $_ : ()} @inclusions;
    }
    elsif ($categoryAction eq 'removeExclusion') {
        my @exclusion_to_remove = $cgi->param('exclusion_to_remove');
        @exclusions = map {(lsearch(\@exclusion_to_remove, $_) < 0) ? $_ : ()} @exclusions;
    }
    
    # Convert the array @clusions('prod_ID:comp_ID') back to a hash of
    # the form %clusions{'prod_name:comp_name'} = 'prod_ID:comp_ID'
    my %inclusions = clusion_array_to_hash(\@inclusions);
    my %exclusions = clusion_array_to_hash(\@exclusions);

    # Fill $vars with products and components data.
    $vars = get_products_and_components($vars);

    my @groups = Bugzilla::Group->get_all;
    $vars->{'groups'} = \@groups;
    $vars->{'action'} = $cgi->param('action');

    my $type = {};
    foreach my $key ($cgi->param()) { $type->{$key} = $cgi->param($key) }
    # That's what I call a big hack. The template expects to see a group object.
    # This script needs some rewrite anyway.
    $type->{'grant_group'} = {};
    $type->{'grant_group'}->{'name'} = $cgi->param('grant_group');
    $type->{'request_group'} = {};
    $type->{'request_group'}->{'name'} = $cgi->param('request_group');

    $type->{'inclusions'} = \%inclusions;
    $type->{'exclusions'} = \%exclusions;
    $vars->{'type'} = $type;
    $vars->{'token'} = $token;

    # Return the appropriate HTTP response headers.
    print $cgi->header();

    # Generate and return the UI (HTML page) from the appropriate template.
    $template->process("admin/flag-type/edit.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}

# Convert the array @clusions('prod_ID:comp_ID') back to a hash of
# the form %clusions{'prod_name:comp_name'} = 'prod_ID:comp_ID'
sub clusion_array_to_hash {
    my $array = shift;
    my %hash;
    my %products;
    my %components;
    foreach my $ids (@$array) {
        trick_taint($ids);
        my ($product_id, $component_id) = split(":", $ids);
        my $product_name = "__Any__";
        if ($product_id) {
            $products{$product_id} ||= new Bugzilla::Product($product_id);
            $product_name = $products{$product_id}->name if $products{$product_id};
        }
        my $component_name = "__Any__";
        if ($component_id) {
            $components{$component_id} ||= new Bugzilla::Component($component_id);
            $component_name = $components{$component_id}->name if $components{$component_id};
        }
        $hash{"$product_name:$component_name"} = $ids;
    }
    return %hash;
}

sub insert {
    my $token = shift;
    check_token_data($token, 'add_flagtype');
    my $name = validateName();
    my $description = validateDescription();
    my $cc_list = validateCCList();
    validateTargetType();
    validateSortKey();
    validateIsActive();
    validateIsRequestable();
    validateIsRequesteeble();
    validateAllowMultiple();
    validateGroups();

    my $dbh = Bugzilla->dbh;

    my $target_type = $cgi->param('target_type') eq "bug" ? "b" : "a";

    $dbh->bz_start_transaction();

    # Insert a record for the new flag type into the database.
    $dbh->do('INSERT INTO flagtypes
                          (name, description, cc_list, target_type,
                           sortkey, is_active, is_requestable, 
                           is_requesteeble, is_multiplicable, 
                           grant_group_id, request_group_id) 
                   VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)',
              undef, ($name, $description, $cc_list, $target_type,
                      $cgi->param('sortkey'), $cgi->param('is_active'),
                      $cgi->param('is_requestable'), $cgi->param('is_requesteeble'),
                      $cgi->param('is_multiplicable'), scalar($cgi->param('grant_gid')),
                      scalar($cgi->param('request_gid'))));

    # Get the ID of the new flag type.
    my $id = $dbh->bz_last_key('flagtypes', 'id');

    # Populate the list of inclusions/exclusions for this flag type.
    validateAndSubmit($id);

    $dbh->bz_commit_transaction();

    $vars->{'name'} = $name;
    $vars->{'message'} = "flag_type_created";
    delete_token($token);

    $vars->{'bug_types'} = Bugzilla::FlagType::match({'target_type' => 'bug'});
    $vars->{'attachment_types'} = Bugzilla::FlagType::match({'target_type' => 'attachment'});

    # Return the appropriate HTTP response headers.
    print $cgi->header();

    $template->process("admin/flag-type/list.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}


sub update {
    my $token = shift;
    check_token_data($token, 'edit_flagtype');
    my $flag_type = validateID();
    my $id = $flag_type->id;
    my $name = validateName();
    my $description = validateDescription();
    my $cc_list = validateCCList();
    validateTargetType();
    validateSortKey();
    validateIsActive();
    validateIsRequestable();
    validateIsRequesteeble();
    validateAllowMultiple();
    validateGroups();

    my $dbh = Bugzilla->dbh;
    my $user = Bugzilla->user;
    $dbh->bz_start_transaction();
    $dbh->do('UPDATE flagtypes
                 SET name = ?, description = ?, cc_list = ?,
                     sortkey = ?, is_active = ?, is_requestable = ?,
                     is_requesteeble = ?, is_multiplicable = ?,
                     grant_group_id = ?, request_group_id = ?
               WHERE id = ?',
              undef, ($name, $description, $cc_list, $cgi->param('sortkey'),
                      $cgi->param('is_active'), $cgi->param('is_requestable'),
                      $cgi->param('is_requesteeble'), $cgi->param('is_multiplicable'),
                      scalar($cgi->param('grant_gid')), scalar($cgi->param('request_gid')),
                      $id));
    
    # Update the list of inclusions/exclusions for this flag type.
    validateAndSubmit($id);

    $dbh->bz_commit_transaction();

    # Clear existing flags for bugs/attachments in categories no longer on 
    # the list of inclusions or that have been added to the list of exclusions.
    my $flag_ids = $dbh->selectcol_arrayref('SELECT DISTINCT flags.id
                                               FROM flags
                                         INNER JOIN bugs
                                                 ON flags.bug_id = bugs.bug_id
                                    LEFT OUTER JOIN flaginclusions AS i
                                                 ON (flags.type_id = i.type_id 
                                                     AND (bugs.product_id = i.product_id
                                                          OR i.product_id IS NULL)
                                                     AND (bugs.component_id = i.component_id
                                                          OR i.component_id IS NULL))
                                              WHERE flags.type_id = ?
                                                AND i.type_id IS NULL',
                                             undef, $id);
    my $flags = Bugzilla::Flag->new_from_list($flag_ids);
    foreach my $flag (@$flags) {
        my $bug = new Bugzilla::Bug($flag->bug_id);
        Bugzilla::Flag::clear($flag, $bug, $flag->attachment);
    }

    $flag_ids = $dbh->selectcol_arrayref('SELECT DISTINCT flags.id
                                            FROM flags
                                      INNER JOIN bugs 
                                              ON flags.bug_id = bugs.bug_id
                                      INNER JOIN flagexclusions AS e
                                              ON flags.type_id = e.type_id
                                           WHERE flags.type_id = ?
                                             AND (bugs.product_id = e.product_id
                                                  OR e.product_id IS NULL)
                                             AND (bugs.component_id = e.component_id
                                                  OR e.component_id IS NULL)',
                                          undef, $id);
    $flags = Bugzilla::Flag->new_from_list($flag_ids);
    foreach my $flag (@$flags) {
        my $bug = new Bugzilla::Bug($flag->bug_id);
        Bugzilla::Flag::clear($flag, $bug, $flag->attachment);
    }

    # Now silently remove requestees from flags which are no longer
    # specifically requestable.
    if (!$cgi->param('is_requesteeble')) {
        $dbh->do('UPDATE flags SET requestee_id = NULL WHERE type_id = ?',
                 undef, $id);
    }

    $vars->{'name'} = $name;
    $vars->{'message'} = "flag_type_changes_saved";
    delete_token($token);

    $vars->{'bug_types'} = Bugzilla::FlagType::match({'target_type' => 'bug'});
    $vars->{'attachment_types'} = Bugzilla::FlagType::match({'target_type' => 'attachment'});

    # Return the appropriate HTTP response headers.
    print $cgi->header();

    $template->process("admin/flag-type/list.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}


sub confirmDelete {
    my $flag_type = validateID();

    $vars->{'flag_type'} = $flag_type;
    $vars->{'token'} = issue_session_token('delete_flagtype');
    # Return the appropriate HTTP response headers.
    print $cgi->header();

    # Generate and return the UI (HTML page) from the appropriate template.
    $template->process("admin/flag-type/confirm-delete.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}


sub deleteType {
    my $token = shift;
    check_token_data($token, 'delete_flagtype');
    my $flag_type = validateID();
    my $id = $flag_type->id;
    my $dbh = Bugzilla->dbh;

    $dbh->bz_start_transaction();

    # Get the name of the flag type so we can tell users
    # what was deleted.
    $vars->{'name'} = $flag_type->name;

    $dbh->do('DELETE FROM flags WHERE type_id = ?', undef, $id);
    $dbh->do('DELETE FROM flaginclusions WHERE type_id = ?', undef, $id);
    $dbh->do('DELETE FROM flagexclusions WHERE type_id = ?', undef, $id);
    $dbh->do('DELETE FROM flagtypes WHERE id = ?', undef, $id);
    $dbh->bz_commit_transaction();

    $vars->{'message'} = "flag_type_deleted";
    delete_token($token);

    $vars->{'bug_types'} = Bugzilla::FlagType::match({'target_type' => 'bug'});
    $vars->{'attachment_types'} = Bugzilla::FlagType::match({'target_type' => 'attachment'});

    # Return the appropriate HTTP response headers.
    print $cgi->header();

    $template->process("admin/flag-type/list.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}


sub deactivate {
    my $token = shift;
    check_token_data($token, 'delete_flagtype');
    my $flag_type = validateID();
    validateIsActive();

    my $dbh = Bugzilla->dbh;

    $dbh->bz_start_transaction();
    $dbh->do('UPDATE flagtypes SET is_active = 0 WHERE id = ?', undef, $flag_type->id);
    $dbh->bz_commit_transaction();

    $vars->{'message'} = "flag_type_deactivated";
    $vars->{'flag_type'} = $flag_type;
    delete_token($token);

    $vars->{'bug_types'} = Bugzilla::FlagType::match({'target_type' => 'bug'});
    $vars->{'attachment_types'} = Bugzilla::FlagType::match({'target_type' => 'attachment'});

    # Return the appropriate HTTP response headers.
    print $cgi->header();

    # Generate and return the UI (HTML page) from the appropriate template.
    $template->process("admin/flag-type/list.html.tmpl", $vars)
      || ThrowTemplateError($template->error());
}

sub get_products_and_components {
    my $vars = shift;

    my @products = Bugzilla::Product->get_all;
    # We require all unique component names.
    my %components;
    foreach my $product (@products) {
        foreach my $component (@{$product->components}) {
            $components{$component->name} = 1;
        }
    }
    $vars->{'products'} = \@products;
    $vars->{'components'} = [sort(keys %components)];
    return $vars;
}

################################################################################
# Data Validation / Security Authorization
################################################################################

sub validateID {
    my $id = $cgi->param('id');
    my $flag_type = new Bugzilla::FlagType($id)
        || ThrowCodeError('flag_type_nonexistent', { id => $id });

    return $flag_type;
}

sub validateName {
    my $name = $cgi->param('name');
    ($name && $name !~ /[ ,]/ && length($name) <= 50)
      || ThrowUserError("flag_type_name_invalid",
                        { name => $name });
    trick_taint($name);
    return $name;
}

sub validateDescription {
    my $description = $cgi->param('description');
    length($description) < 2**16-1
      || ThrowUserError("flag_type_description_invalid");
    trick_taint($description);
    return $description;
}

sub validateCCList {
    my $cc_list = $cgi->param('cc_list');
    length($cc_list) <= 200
      || ThrowUserError("flag_type_cc_list_invalid", 
                        { cc_list => $cc_list });

    my @addresses = split(/[, ]+/, $cc_list);
    # We do not call Util::validate_email_syntax because these
    # addresses do not require to match 'emailregexp' and do not
    # depend on 'emailsuffix'. So we limit ourselves to a simple
    # sanity check:
    # - match the syntax of a fully qualified email address;
    # - do not contain any illegal character.
    foreach my $address (@addresses) {
        ($address =~ /^[\w\.\+\-=]+@[\w\.\-]+\.[\w\-]+$/
           && $address !~ /[\\\(\)<>&,;:"\[\] \t\r\n]/)
          || ThrowUserError('illegal_email_address',
                            {addr => $address, default => 1});
    }
    trick_taint($cc_list);
    return $cc_list;
}

sub validateProduct {
    my $product_name = shift;
    return unless $product_name;

    my $product = Bugzilla::Product::check_product($product_name);
    return $product;
}

sub validateComponent {
    my ($product, $component_name) = @_;
    return unless $component_name;

    ($product && $product->id)
      || ThrowUserError("flag_type_component_without_product");

    my $component = Bugzilla::Component->check({ product => $product,
                                                 name => $component_name });
    return $component;
}

sub validateSortKey {
    # $sortkey is destroyed if detaint_natural fails.
    my $sortkey = $cgi->param('sortkey');
    detaint_natural($sortkey)
      && $sortkey < 32768
      || ThrowUserError("flag_type_sortkey_invalid", 
                        { sortkey => scalar $cgi->param('sortkey') });
    $cgi->param('sortkey', $sortkey);
}

sub validateTargetType {
    grep($cgi->param('target_type') eq $_, ("bug", "attachment"))
      || ThrowCodeError("flag_type_target_type_invalid", 
                        { target_type => scalar $cgi->param('target_type') });
}

sub validateIsActive {
    $cgi->param('is_active', $cgi->param('is_active') ? 1 : 0);
}

sub validateIsRequestable {
    $cgi->param('is_requestable', $cgi->param('is_requestable') ? 1 : 0);
}

sub validateIsRequesteeble {
    $cgi->param('is_requesteeble', $cgi->param('is_requesteeble') ? 1 : 0);
}

sub validateAllowMultiple {
    $cgi->param('is_multiplicable', $cgi->param('is_multiplicable') ? 1 : 0);
}

sub validateGroups {
    my $dbh = Bugzilla->dbh;
    # Convert group names to group IDs
    foreach my $col ('grant', 'request') {
        my $name = $cgi->param($col . '_group');
        if ($name) {
            trick_taint($name);
            my $gid = $dbh->selectrow_array('SELECT id FROM groups
                                             WHERE name = ?', undef, $name);
            $gid || ThrowUserError("group_unknown", { name => $name });
            $cgi->param($col . '_gid', $gid);
        }
    }
}

# At this point, values either come the DB itself or have been recently
# added by the user and have passed all validation tests.
# The only way to have invalid product/component combinations is to
# hack the URL. So we silently ignore them, if any.
sub validateAndSubmit {
    my ($id) = @_;
    my $dbh = Bugzilla->dbh;

    # Cache product objects.
    my %products;
    foreach my $category_type ("inclusions", "exclusions") {
        # Will be used several times below.
        my $sth = $dbh->prepare("INSERT INTO flag$category_type " .
                                "(type_id, product_id, component_id) " .
                                "VALUES (?, ?, ?)");

        $dbh->do("DELETE FROM flag$category_type WHERE type_id = ?", undef, $id);
        foreach my $category ($cgi->param($category_type)) {
            trick_taint($category);
            my ($product_id, $component_id) = split(":", $category);
            # Does the product exist?
            if ($product_id) {
                $products{$product_id} ||= new Bugzilla::Product($product_id);
                next unless defined $products{$product_id};
            }
            # A component was selected without a product being selected.
            next if (!$product_id && $component_id);
            # Does the component belong to this product?
            if ($component_id) {
                my @match = grep {$_->id == $component_id} @{$products{$product_id}->components};
                next unless scalar(@match);
            }
            $product_id ||= undef;
            $component_id ||= undef;
            $sth->execute($id, $product_id, $component_id);
        }
    }
}

sub filter_group {
    my $flag_types = shift;
    return $flag_types unless Bugzilla->cgi->param('group');

    my $gid = scalar $cgi->param('group');
    my @flag_types = grep {($_->grant_group && $_->grant_group->id == $gid)
                           || ($_->request_group && $_->request_group->id == $gid)} @$flag_types;

    return \@flag_types;
}