#!/usr/bin/perl
# 
# This handles moving around and managing files on Anvil! nodes, DR hosts and Striker dashboards.
# 
# When this is called (periodically by the daemon of after an upload / ISO generation);
# - 1. Check 'incoming/' for files. For any found, generate an md5sum and see if the file name and sum match 
#      anything in the database from any host;
#      - If so, update/add an entry in 'file_locations'
#      - If not, create a new entry in 'files' and then add the first entry in 'file_locations'
# - 2. Check 'file_locations' for any files on this system, and verify they exist still. 
#      - If not, check the other files for one with a matching md5sum. If found, handle as a rename.
#      - If not found at all, search for the file according to the search rules and copy to here if found.
#      - If not found anywhere, remove it from 'file_locations' and send an alert.
#      - If found, check the size. If it differs, recalculate the md5sum.
# - 3. If called with '--rename --file <filename> --to <newname>', rename the file and update 'files'.
# - 4. If called with '--delete', remove from 'file_locations' and all copies on all systems. This is done by 
#      registering a job against all known hosts. As such, if this is called and the target file  doesn't exist, 
#      it just clears the job and then exits.
# - 5. If called with '--is-script=[0|1]', mark as 'script' in the 'files' table and set/remove the executable bit.
#
# Exit codes;
# 0 = Normal exit or md5sum of this program changed and it exited to reload.
# 1 = No databases available.
# 2 = Another process that is still running has picked up this job.
# 3 = No filename specified when needed by another switch.
# 4 = Request to change the file name but the new name wasn't given.
# 5 = The file specified was not found.
# 6 = The file to delete is not under '/mnt/shared/'.
# 
# TODO: 
# - If two Strikers have the same file name, but different sizes, we get into a yo-yo of updating the two 
#   sides. If this happens, we need to rsync the larger one over the smaller one.
# 
# NOTE:
# - remove unsyncs, add syncs.
# 

use strict;
use warnings;
use Anvil::Tools;
use Data::Dumper;

# Disable buffering
$| = 1;

my $THIS_FILE           =  ($0 =~ /^.*\/(.*)$/)[0];
my $running_directory   =  ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
if (($running_directory =~ /^\./) && ($ENV{PWD}))
{
	$running_directory =~ s/^\./$ENV{PWD}/;
}

my $anvil = Anvil::Tools->new();

$anvil->Get->switches({list => ["add", "check", "delete", "download", "file", "is-script", "job-uuid", "rename", "remove", "to"], man => $THIS_FILE});
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => $anvil->data->{switches}});

# Connect or die
$anvil->Database->connect;
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, secure => 0, key => "log_0132"});
if (not $anvil->data->{sys}{database}{connections})
{
	# No databases, exit.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0003"});
	$anvil->nice_exit({exit_code => 1});
}

# If we have a job_uuid, pick it up.
if ($anvil->data->{switches}{'job-uuid'})
{
	my $return = $anvil->Job->get_job_details({check => 1, job_uuid => $anvil->data->{switches}{'job-uuid'}});
	if ($return == 1)
	{
		# It's not a UUID.
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 1, list => { 'return' => $return }});
		$anvil->nice_exit({exit_code => 2});
	}
	if ($return == 2)
	{
		# This job is being handled by another process that is still alive.
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 1, list => { 'return' => $return }});
		$anvil->nice_exit({exit_code => 3});
	}
	
	# If there's a progress, clear it.
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 1, list => { 'job::job_progress' => $anvil->data->{job}{job_progress} }});
	if ($anvil->data->{job}{job_progress})
	{
		$anvil->Job->update_progress({
			progress => 1, 
			message  => "clear", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
	}
}

# What are we doing?
if ($anvil->data->{switches}{'rename'})
{
	handle_rename($anvil);
}
elsif ($anvil->data->{switches}{'delete'})
{
	handle_delete($anvil);
}
elsif ($anvil->data->{switches}{'is-script'})
{
	handle_script($anvil);
}
elsif ($anvil->data->{switches}{check})
{
	# Check for files scheduled for deletion.
	check_for_deletes($anvil);
	
	# Check for new files
	check_incoming($anvil);
	
	# Check for files we should have but don't yet have.
	find_missing_files($anvil);
}
else
{
	# Show the list of all files we know about.
	show_files($anvil);
}

# We're done
$anvil->nice_exit({exit_code => 0});


#############################################################################################################
# Private functions.                                                                                        #
#############################################################################################################

# This lists all files.
sub show_files
{
	my ($anvil) = @_;
	
	
	
	return(0);
}

# This looks to see if there are any entries in 'file_locations' for us that, the pointed to file, doesn't 
# exist on this machine. For those entries, we will search for the file on other machines. The one exception
# is server definition files. For those, we write the file out from the server's 'definition' table entry.
# 
# When a missing entry is found, and an entry doesn't exist, the file will be found (if possible) and copied
# to this host. Only machines on the same subnet are searched. The search pattern is; 
# 
# Nodes;   1. Check for the file on the peer.
#          2. Check for the file on Strikers, in alphabetical order.
#          3. Check for the file on DR host, if available.
#          4. Check other nodes, in alphabetical order.
#          5. Check other DR hosts, in alphabetical order.
# Striker; 1. Check for the file on other Strikers, in alphabetical order.
#          2. Check for the file on DR hosts, if available
#          3. Check for the file on Anvil! nodes.
# DR Host; 1. Check for the file on Strikers, in alphabetical order.
#          2. Check for the file on Anvil! nodes.
# * If a file can't be found, it will try again every so often until it is found.
# * When a file is found, it is copied to '/mnt/shared/incoming'. Only when the file has arrived and the 
#   md5sum matches. At this point, it is moved into the proper directory.
sub find_missing_files
{
	my ($anvil) = @_;
	
	# What am I? This will impact how missing files are found.
	$anvil->Database->get_anvils();
	
	my $query = "
SELECT 
    file_uuid, 
    file_directory, 
    file_name, 
    file_size, 
    file_md5sum  
FROM 
    files 
WHERE 
    file_type != 'DELETED' 
ORDER BY 
    file_directory ASC, 
    file_name ASC 
;";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
	
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		results => $results, 
		count   => $count, 
	}});
	foreach my $row (@{$results})
	{
		my $file_uuid      =  $row->[0];
		my $file_directory =  $row->[1];
		my $file_name      =  $row->[2];
		my $file_size      =  $row->[3];
		my $file_md5sum    =  $row->[4];
		my $full_path      =  $file_directory."/".$file_name;
		   $full_path      =~ s/\/\//\//g;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:file_uuid'      => $file_uuid, 
			's2:file_directory' => $file_directory, 
			's3:file_name'      => $file_name, 
			's4:file_size'      => $file_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $file_size}).")", 
			's5:file_md5sum'    => $file_md5sum, 
			's6:full_path'      => $full_path,
		}});
		
		# If we're a striker, we want all files.
		my $host_type = $anvil->Get->host_type();
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { host_type => $host_type }});
		if ($host_type eq "striker")
		{
			if (not -e $full_path)
			{
				# Missing file!
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0269", variables => { file => $full_path }});
				
				# Find what target, if any, we'll the file from.
				my ($found) = find_file($anvil, $file_uuid, $full_path, $file_size, $file_md5sum);
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { found => $found }});
			}
			
			# If we're a Striker, see if any Anvil! systems exist that don't know about this file. 
			$anvil->Database->check_file_locations({debug => 2});
		}
		else
		{
			# Check to see if we're supposed to have this file.
			$anvil->Database->get_file_locations();
			my $anvil_uuid = $anvil->Cluster->get_anvil_uuid();
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { anvil_uuid => $anvil_uuid }});
			
			# Nothing to do if we're not in an Anvil! yet.
			next if not $anvil_uuid;
			
			# Do we have a file_location_uuid? If not, there will be soon but nothing to do until
			# then.
			my $file_location_uuid = $anvil->data->{file_locations}{anvil_uuid}{$anvil_uuid}{file_uuid}{$file_uuid}{file_location_uuid};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { file_location_uuid => $file_location_uuid }});
			next if not $file_location_uuid;
			
			# Should we have it?
			my $file_location_active = $anvil->data->{file_locations}{file_location_uuid}{$file_location_uuid}{file_location_active};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { file_location_active => $file_location_active }});
			
			if ($file_location_active)
			{
				# Make sure it exists, and add it if not.
				if (not -e $full_path)
				{
					# Find and copy it.
					my ($found) = find_file($anvil, $file_uuid, $full_path, $file_size, $file_md5sum);
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { found => $found }});
				}
			}
			else
			{
				# If it exists, remove it.
				if (-e $full_path)
				{
					# Delete it.
					$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0285", variables => { file => $full_path }});
					
					unlink $full_path;
					
					# Sleep and verify
					sleep 1;
					if (-e $full_path)
					{
						# Failed to delete...
						$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0284", variables => { file => $full_path }});
						return("");
					}
					else
					{
						# Deleted successfully.
						$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0283"});
					}
				}
			}
		}
	}
	
	return(0);
}

# This looks for a file on another system. The exact order of search depends on what kind of machine we are.
sub find_file
{
	my ($anvil, $file_uuid, $full_path, $file_size, $file_md5sum) = @_;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		's1:file_uuid'   => $file_uuid,
		's2:full_path'   => $full_path, 
		's3:file_size'   => $file_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $file_size}).")",
		's4:file_md5sum' => $file_md5sum, 
	}});
	
	# Before we do anything, see if the file is shown as being in a directory other than 'files' in the 
	# database, but actually in files on disk. If so, update the database.
	my $host_type       = $anvil->Get->host_type();
	my $file_directory  =  $anvil->data->{files}{file_uuid}{$file_uuid}{file_directory};
	my $file_name       =  $anvil->data->{files}{file_uuid}{$file_uuid}{file_name};
	my $files_full_path =  $anvil->data->{path}{directories}{shared}{files}."/".$file_name;
	   $files_full_path =~ s/\/\//\//g;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		's1:file_directory'  => $file_directory,
		's2:file_name'       => $file_name, 
		's3:files_full_path' => $files_full_path, 
	}});
	
	if (($full_path ne $files_full_path) && (-e $files_full_path) && ($host_type eq "striker"))
	{
		### TODO: Add checks to see if anything other than the directory needs updating.
		# It's in 'files' now, update the database.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0725", variables => {
			file      => $full_path, 
			directory => $anvil->data->{path}{directories}{shared}{files}, 
		}});
		$anvil->Database->insert_or_update_files({
			debug          => 2,
			file_uuid      => $file_uuid, 
			file_name      => $anvil->data->{files}{file_uuid}{$file_uuid}{file_name}, 
			file_directory => $anvil->data->{path}{directories}{shared}{files}, 
			file_size      => $anvil->data->{files}{file_uuid}{$file_uuid}{file_size}, 
			file_md5sum    => $anvil->data->{files}{file_uuid}{$file_uuid}{file_md5sum}, 
			file_mtime     => $anvil->data->{files}{file_uuid}{$file_uuid}{file_mtime}, 
			file_type      => $anvil->data->{files}{file_uuid}{$file_uuid}{file_type}, 
		});
		
		return(1);
	}
	
	# We want to search Striker's first, DR hosts second and nodes third.
	$anvil->Database->get_hosts;
	my $host_order = [];
	foreach my $type ("striker", "dr", "node")
	{
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { type => $type }});
		foreach my $host_name (sort {$a cmp $b} keys %{$anvil->data->{sys}{hosts}{by_name}})
		{
			my $host_uuid = $anvil->data->{sys}{hosts}{by_name}{$host_name};
			my $host_type = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_type};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				's1:host_name' => $host_name, 
				's2:host_type' => $host_type, 
				's3:host_uuid' => $host_uuid,
			}});
			
			next if $host_type ne $type;
			next if $host_uuid eq $anvil->Get->host_uuid;
			
			push @{$host_order}, $host_uuid;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { host_uuid => $host_uuid }});
		}
	}
	
	# Now search.
	my $found_on_host = 0;	# Found the file on a target
	my $file_found    = 0;	# Actually have the file locally.
	foreach my $search_host_uuid (@{$host_order})
	{
		last if $file_found;
		my $target_host = $anvil->data->{hosts}{host_uuid}{$search_host_uuid}{short_host_name};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:target_host'      => $target_host, 
			's2:search_host_uuid' => $search_host_uuid,
		}});
		
		my $target_ip = $anvil->Network->find_target_ip({host_uuid => $search_host_uuid});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { target_ip => $target_ip }});
		next if not $target_ip;
		
		# See if the file is on the target and, if so, if it matches.
		### NOTE: If we want to use md5sum again, use '--with-md5sum'
		my $shell_call = $anvil->data->{path}{exe}{'anvil-file-details'}." --file ".$full_path.$anvil->Log->switches;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { shell_call => $shell_call }});
		
		# Test access
		my $access = $anvil->Remote->test_access({target => $target_ip});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { access => $access }});
		next if not $access;
		
		my $remote_size                    = 0;
		my ($output, $error, $return_code) = $anvil->Remote->call({
			shell_call => $shell_call, 
			target     => $target_ip, 
		});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			error       => $error,
			output      => $output,
			return_code => $return_code, 
		}});
		foreach my $line (split/\n/, $output)
		{
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { line => $line }});
			if ($line =~ /^size: \[(\d+)\]$/)
			{
				$remote_size   = $1;
				$found_on_host = 1;
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					remote_size   => $remote_size,
					found_on_host => $found_on_host,
				}});
			}
		}
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:found_on_host' => $found_on_host,
			's2:remote_size'   => $remote_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $remote_size}).")",
			's3:file_size'     => $file_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $file_size}).")",
		}});
		next if not $found_on_host;
		
		if ($remote_size eq $file_size)
		{
			# Pull it over!
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0276", variables => {
				file      => $full_path, 
				host_name => $target_host, 
				ip        => $target_ip, 
			}});
			my $failed = $anvil->Storage->rsync({
				debug       => 2, 
				destination => $full_path,
				source      => "root\@".$target_ip.":".$full_path,
			});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { failed => $failed }});
			
			if (-f $full_path)
			{
				# Got it!
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0277", variables => { file => $full_path }});
				
				# Verify the md5sum.
				my $local_md5sum = $anvil->Get->md5sum({file => $full_path});
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
					local_md5sum => $local_md5sum, 
					file_md5sum  => $file_md5sum, 
				}});
				if ($local_md5sum eq $file_md5sum)
				{
					# Success!
					$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0278", variables => { file => $full_path }});
					
					$file_found = 1;
					$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { file_found => $file_found }});
					last;
				}
				else
				{
					# Failed. :(
					$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0279", variables => { file => $full_path }});
					unlink $full_path;
				}
			}
			else
			{
				# Failed to rsync.
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0280", variables => { 
					file      => $full_path, 
					host_name => $target_host, 
					ip        => $target_ip, 
				}});
			}
		}
		else
		{
			# Doesn't match what we're looking for.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0281", variables => { 
				file            => $full_path, 
				host_name       => $target_host, 
				ip              => $target_ip, 
				file_size       => $file_size,
				say_file_size   => $anvil->Convert->bytes_to_human_readable({'bytes' => $file_size}),
				remote_size     => $remote_size,
				say_remote_size => $anvil->Convert->bytes_to_human_readable({'bytes' => $remote_size}), 
			}});
		}
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { file_found => $file_found }});
	return($file_found);
}


# This handles deleting a file. 
sub check_incoming
{
	my ($anvil) = @_;
	
	# This hash shouldn't exist, but lets be safe...
	if (exists $anvil->data->{scan}{directories})
	{
		delete $anvil->data->{scan}{directories};
	}
	
	# Read any files in '/mnt/shared/incoming'.
	$anvil->Storage->scan_directory({
		debug     => 3,
		directory => $anvil->data->{path}{directories}{shared}{base},
		recursive => 1,
	});
	
	my $archives_directory    = $anvil->data->{path}{directories}{shared}{archives};
	my $definitions_directory = $anvil->data->{path}{directories}{shared}{definitions};
	my $incoming_directory    = $anvil->data->{path}{directories}{shared}{incoming};
	my $provision_directory   = $anvil->data->{path}{directories}{shared}{provision};
	my $temp_directory        = $anvil->data->{path}{directories}{shared}{temp};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		archives_directory    => $archives_directory, 
		definitions_directory => $definitions_directory,
		incoming_directory    => $incoming_directory, 
		provision_directory   => $provision_directory, 
		temp_directory        => $temp_directory, 
	}});
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, key => "log_0264"});
	foreach my $full_path (sort {$a cmp $b} keys %{$anvil->data->{scan}{directories}})
	{
		# Skip this if it's under a directory managed elsewhere, or that we don't care about.
		next if $full_path =~ /^$temp_directory/;
		next if $full_path =~ /^$provision_directory/;
		next if $full_path =~ /^$definitions_directory/;
		
		# Skip if this isn't a file.
		my $file_type = $anvil->data->{scan}{directories}{$full_path}{type};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
			full_path => $full_path,
			file_type => $file_type, 
		}});
		next if $file_type ne "file";
		
		my $file_name       =  $anvil->data->{scan}{directories}{$full_path}{name};
		my $file_directory  =  $anvil->data->{scan}{directories}{$full_path}{directory};
		my $file_size       =  $anvil->data->{scan}{directories}{$full_path}{size};
		my $file_mtime      =  $anvil->data->{scan}{directories}{$full_path}{mtime};
		my $file_mimetype   =  $anvil->data->{scan}{directories}{$full_path}{mimetype};
		my $file_executable =  $anvil->data->{scan}{directories}{$full_path}{executable} = -x $full_path ? 1 : 0;
		my $say_mimetype    =  convert_mimetype($anvil, $file_mimetype, $full_path, $file_executable);
		my $full_path       =  $file_directory."/".$file_name;
		   $full_path       =~ s/\/\//\//g;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
			file_name       => $file_name, 
			file_size       => $file_size, 
			file_mtime      => $file_mtime, 
			file_mimetype   => $file_mimetype, 
			file_executable => $file_executable, 
			say_mimetype    => $say_mimetype, 
			full_path       => $full_path,
		}});
		
		# Do I know about this file? If so, is the file the same size? If either is no, calculate the md5sum.
		my ($file_uuid, $recorded_size, $recorded_mtime, $recorded_md5sum) = get_file_db_info($anvil, "", $file_name);
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
			file_uuid       => $file_uuid, 
			recorded_size   => $recorded_size,
			recorded_mtime  => $recorded_mtime, 
			recorded_md5sum => $recorded_md5sum,
		}});
		
		# Calculate the md5sum?
		my $file_md5sum =  $recorded_md5sum;
		if ((not $file_uuid) or ($file_size != $recorded_size))
		{
			# It's possible the file is still uploading, so sleep for 2 seconds and see if the 
			# size is still changing.
			my $last_size = $file_size;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				last_size => $last_size." (".$anvil->Convert->bytes_to_human_readable({'bytes' => $last_size}).")", 
			}});
			$anvil->Storage->_wait_if_changing({
				file      => $full_path,
				last_size => $file_size, 
			});
			
			# Yes, caluclate md5sum, but first, do we have a size mismatch? If so, see if we need
			# to pull a newer version down from elsewhere.
			if (($file_uuid) && ($file_mtime <= $recorded_mtime))
			{
				# We've got an older file, we need to update.
				pull_file($anvil, $file_uuid, $recorded_size, $recorded_mtime, $recorded_md5sum);
				
				# TODO: Now see if it exists and, if it does, re-stat it. If not, loop to the
				#       next file and skip this one.
			}

			# Now generate the md5sum. If this file is over 128 MiB, warn the user that it might
			# take a while.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0265", variables => { file => $full_path }});
			if ($file_size > (128 * (2 ** 20)))
			{
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0266", variables => { 
					size => $anvil->Convert->bytes_to_human_readable({'bytes' => $file_size}),
				}});
			}
			
			# Update (or get) the md5sum.
			$file_md5sum = $anvil->Get->md5sum({debug => 2, file => $full_path});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				say_mimetype => $say_mimetype, 
				file_md5sum  => $file_md5sum,
			}});
			
			# Insert or update the files entry.
			($file_uuid) = $anvil->Database->insert_or_update_files({
				debug          => 3,
				file_uuid      => $file_uuid, 
				file_name      => $file_name, 
				file_directory => $file_directory, 
				file_size      => $file_size, 
				file_md5sum    => $file_md5sum, 
				file_mtime     => $file_mtime, 
				file_type      => $say_mimetype, 
			});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { file_uuid => $file_uuid }});
		}
		
		# If we still don't have a file UUID for some reason, skip this file.
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { file_uuid => $file_uuid }});
		next if not $file_uuid;
		
		# Are we in the incoming directory? If so, move the file.
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
			full_path          => $full_path,
			incoming_directory => $incoming_directory, 
		}});
		if ($full_path =~ /^$incoming_directory/)
		{
			# Ignore files starting with '.', they're often in-progress rsync's. 
			next if $file_name =~ /^\./;
			
			# If it's a definition file, we'll move it to 
			# 'path::directories::shared::definitions', otherwise we'll move it to 
			# 'path::directories::shared::files'.
			my $target =  $say_mimetype eq "definition" ? $anvil->data->{path}{directories}{shared}{definitions} : $anvil->data->{path}{directories}{shared}{files};
			   $target .= "/";
			   $target =~ s/\/\//\//g;
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { target => $target }});
			
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0268", variables => { 
				file   => $full_path,
				target => $target, 
			}});
			
			# Wait in case it's still being uploaded.
			$anvil->Storage->_wait_if_changing({
				file      => $full_path,
				last_size => $file_size, 
			});
			
			$anvil->Storage->move_file({
				debug       => 3,
				source_file => $full_path, 
				target_file => $target,
			});
			
			# Update the file_directory.
			($file_uuid) = $anvil->Database->insert_or_update_files({
				debug          => 3,
				file_uuid      => $file_uuid, 
				file_name      => $file_name, 
				file_directory => $target, 
				file_size      => $file_size, 
				file_md5sum    => $file_md5sum, 
				file_mtime     => $file_mtime, 
				file_type      => $say_mimetype, 
			});
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { file_uuid => $file_uuid }});
		}
	}
	
	return(0);
}

# This method finds a file elsewhere on the network and pulls it to here.
sub pull_file
{
	my ($anvil, $file_uuid, $recorded_size, $recorded_mtime, $recorded_md5sum) = @_;
	$file_uuid = "" if not defined $file_uuid;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		file_uuid       => $file_uuid,
		recorded_size   => $recorded_size, 
		recorded_mtime  => $recorded_mtime, 
		recorded_md5sum => $recorded_md5sum, 
	}});
	
	# Find the hosts with this file, then connect to it to see if the size is the same as what we want. 
	# If so, pull it down...
	### TODO
	
	return(0);
}

# This gets the file_uuid for a given file name and/or md5sum. If the file isn't found, an empty string is
# returned. If it is found, the file size as recorded in the database is returned.
sub get_file_db_info
{
	my ($anvil, $file_md5sum, $file_name) = @_;
	$file_md5sum = "" if not defined $file_md5sum;
	$file_name   = "" if not defined $file_name;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
		file_md5sum => $file_md5sum, 
		file_name   => $file_name,
	}});
	
	# Get the file size and file uuid, if possible.
	
	# If I have the md5sum, search using that. If I have the filename only, then we'll fall back to that.
	my $query = "
SELECT 
    file_uuid, 
    file_size, 
    file_mtime, 
    file_md5sum 
FROM 
    files 
WHERE 
";
	if ($file_md5sum)
	{
		$query .= "    file_md5sum = ".$anvil->Database->quote($file_md5sum)."\n";
	}
	elsif ($file_name)
	{
		$query .= "    file_name = ".$anvil->Database->quote($file_name)."\n";
	}
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
		results => $results, 
		count   => $count, 
	}});
	if (not $count)
	{
		# File wasn't found in the database
		return("", 0, 0, "");
	}
	my $file_uuid   = defined $results->[0]->[0] ? $results->[0]->[0] : "";
	my $file_size   = defined $results->[0]->[1] ? $results->[0]->[1] : 0;
	my $file_mtime  = defined $results->[0]->[2] ? $results->[0]->[2] : 0;
	   $file_md5sum = defined $results->[0]->[3] ? $results->[0]->[3] : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
		file_uuid   => $file_uuid, 
		file_size   => $file_size, 
		file_mtime  => $file_mtime, 
		file_md5sum => $file_md5sum, 
	}});
	
	return($file_uuid, $file_size, $file_mtime, $file_md5sum);
}

# This handles toggling a file to marked or unmarked as a script.
sub handle_script
{
	my ($anvil) = @_;
	
	if (not $anvil->data->{switches}{file})
	{
		# Um...
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0055"});
		$anvil->Job->update_progress({
			progress => 0, 
			message  => "error_0055", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 3});
	}
	
	# Find the file_uuid (we don't actually care about the file size, mtime or md5sum).
	my ($file_uuid, $file_size, $recorded_mtime, $file_md5sum) = get_file_db_info($anvil, "", $anvil->data->{switches}{file});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { file_uuid => $file_uuid }});
	
	# Toggle the executable bits.
	my $executable = 0;
	if ($anvil->data->{switches}{'is-script'})
	{
		# Is it already executable?
		if (-x $anvil->data->{switches}{file})
		{
			# Switch it on
			$executable = 1;
			$anvil->Storage->change_mode({path => $anvil->data->{switches}{file}, mode => "a+x"});
		}
		else
		{
			# Already a script.
		}
	}
	else
	{
		# Is it executable?
		if (-x $anvil->data->{switches}{file})
		{
			# Switch it off.
			$executable = 1;
			$anvil->Storage->change_mode({path => $anvil->data->{switches}{file}, mode => "a-x"});
		}
		else
		{
			# Already not a script.
		}
	}
	
	# If we have a file UUID, update the 'file_type
	if ($file_uuid)
	{
		# Load the details.
		my $query = "
SELECT 
    file_name, 
    file_directory, 
    file_size, 
    file_md5sum, 
    file_type, 
    file_mtime 
FROM 
    files 
WHERE 
    file_uuid = ".$anvil->Database->quote($file_uuid)." 
;";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
		
		my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { results => $results }});
		my $file_name      = $results->[0]->[0];
		my $file_directory = $results->[0]->[1];
		my $file_size      = $results->[0]->[2];
		my $file_md5sum    = $results->[0]->[3]; 
		my $file_type      = $results->[0]->[4]; 
		my $file_mtime     = $results->[0]->[5]; 
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			file_name      => $file_name, 
			file_directory => $file_directory, 
			file_size      => $file_size, 
			file_md5sum    => $file_md5sum, 
			file_type      => $file_type, 
			file_mtime     => $file_mtime, 
		}});
		if (($file_type eq "script") && (not $anvil->data->{switches}{'is-script'}))
		{
			# Figure out what the file type is and update.
			my $mimetype = mimetype($file_name);
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { mimetype => $mimetype }});
			
			my $say_mimetype = convert_mimetype($anvil, $mimetype, $file_name, 0);
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { say_mimetype => $say_mimetype }});
			$anvil->Database->insert_or_update_files({
				debug          => 2,
				file_uuid      => $file_uuid, 
				file_name      => $anvil->data->{switches}{file}, 
				file_directory => $file_directory,
				file_size      => $file_size, 
				file_md5sum    => $file_md5sum, 
				file_mtime     => $file_mtime, 
				file_type      => $say_mimetype, 
			});
		}
		elsif (($file_type ne "script") && ($anvil->data->{switches}{'is-script'}))
		{
			# Change the file tpye to "script"
			$anvil->Database->insert_or_update_files({
				debug          => 2,
				file_uuid      => $file_uuid, 
				file_name      => $anvil->data->{switches}{file}, 
				file_directory => $file_directory,
				file_size      => $file_size, 
				file_md5sum    => $file_md5sum, 
				file_mtime     => $file_mtime, 
				file_type      => "script", 
			});
		}
	}
	
	return(0);
}

# This takes the mimetype as reported by the 'mimetype' method and returns a file type we care about.
sub convert_mimetype
{
	my ($anvil, $mimetype, $file, $executable) = @_;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { 
		mimetype   => $mimetype,
		file       => $file,
		executable => $executable, 
	}});
	
	my $say_mimetype = "other";
	if ($mimetype)
	{
		if ($mimetype =~ /cd-image/)
		{
			$say_mimetype = "iso";
		}
		elsif ($mimetype =~ /xml/)
		{
			# This might be a definition, but look inside it to be sure.
			my ($is_domain, $return_code) = $anvil->System->call({debug => 3, shell_call => "if \$(".$anvil->data->{path}{exe}{'grep'}." -q '</domain>' ".$file."); then ".$anvil->data->{path}{exe}{echo}." 1; else ".$anvil->data->{path}{exe}{echo}." 0; fi" });
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { is_domain => $is_domain, return_code => $return_code }});

			if ($is_domain)
			{
				$say_mimetype = "definition";
			}
		}
		elsif ($mimetype =~ /rpm$/)
		{
			$say_mimetype = "rpm";
		}
		elsif ($mimetype =~ /disk-image/)
		{
			$say_mimetype = "disk-image";
		}
		elsif ($executable)
		{
			$say_mimetype = "script";
		}
	}
	
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { say_mimetype => $say_mimetype }});
	return($say_mimetype);
}

# This looks for any files with the file_type of 'DELETED'. Any that are found will be deleted.
sub check_for_deletes
{
	my ($anvil) = @_;
	
	# Get a list of files.
	my $query = "SELECT file_uuid, file_directory || '/' || file_name AS full_path FROM files WHERE file_type = 'DELETED';";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
	
	# This will be used to make sure we only delete from files
	my $files_directory = $anvil->data->{path}{directories}{shared}{files};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { files_directory => $files_directory }});
	
	my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		results => $results, 
		count   => $count, 
	}});
	foreach my $row (@{$results})
	{
		my $file_uuid = $row->[0];
		my $full_path = $row->[1];
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:file_uuid' => $file_uuid, 
			's2:full_path' => $full_path, 
		}});
		
		# Only delete if the file is in the shared directory.
		next if $full_path !~ /^$files_directory/;
		
		# Get rid of it (if it actually exists).
		if (-e $full_path)
		{
			# Delete it.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0285", variables => { file => $full_path }});
			
			unlink $full_path;
			
			# Sleep and verify
			sleep 1;
			if (-e $full_path)
			{
				# Failed to delete...
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0284", variables => { file => $full_path }});
				return("");
			}
			else
			{
				# Deleted successfully.
				$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0283"});
			}
		}
		
		# If we're a Striker, check for any file_locations that point to this file and DELETE them.
		my $host_type = $anvil->Get->host_type();
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { host_type => $host_type }});
		if ($host_type eq "striker")
		{
			my $query = "SELECT file_location_uuid FROM file_locations WHERE file_location_file_uuid = ".$anvil->Database->quote($file_uuid).";";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			
			my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
			my $count   = @{$results};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				results => $results, 
				count   => $count, 
			}});
			foreach my $row (@{$results})
			{
				my $file_location_uuid = $row->[0];
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { file_location_uuid => $file_location_uuid }});
				
				# Delete the entry from file_locations, if needed.
				my $query = "DELETE FROM history.file_locations WHERE file_location_uuid = ".$anvil->Database->quote($file_location_uuid).";";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
				
				$query = "DELETE FROM file_locations WHERE file_location_uuid = ".$anvil->Database->quote($file_location_uuid).";";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
			}
		}
	}
	
	return(0);
}

# This handles deleting a file. If the requested deletion target doesn't exist, we'll just clear the 
# database. If that doesn't exist either, we still don't error. This is to handle broad requests to delete a
# file everywhere. If we're asked to delete it everywhere, then we'll register a job against all hosts.
sub handle_delete
{
	my ($anvil) = @_;
	
	my $full_path = $anvil->data->{switches}{file};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { full_path => $full_path }});
	if (not $full_path)
	{
		# Um...
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0052"});
		$anvil->Job->update_progress({
			progress => 100, 
			message  => "error_0052", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 3});
	}
	elsif ($full_path !~ /^\/mnt\/shared\//)
	{
		# We don't do that here...
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0053", variables => { file => $full_path }});
		$anvil->Job->update_progress({
			progress => 100, 
			message  => "error_0053,!!file!".$full_path."!!", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 6});
	}
	
	# What's the UUID of this file? I collect all the data for the update, if appropriate.
	my $file_name      = ($full_path =~ /^.*\/(.*)$/)[0];
	my $file_directory = ($full_path =~ /^(.*?)\/$file_name$/)[0];
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		full_name      => $file_name,
		file_directory => $file_directory, 
	}});
	my $query = "
SELECT 
    file_uuid, 
    file_size, 
    file_md5sum,
    file_type, 
    file_mtime 
FROM 
    files 
WHERE 
    file_name = ".$anvil->Database->quote($file_name)." 
AND 
    file_directory = ".$anvil->Database->quote($file_directory)."
;";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
	
	my $results   = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
	my $count   = @{$results};
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		results => $results, 
		count   => $count, 
	}});
	
	my $file_uuid      = defined $results->[0]->[0] ? $results->[0]->[0] : "";
	my $file_size      = defined $results->[0]->[1] ? $results->[0]->[1] : "";
	my $file_md5sum    = defined $results->[0]->[2] ? $results->[0]->[2] : "";
	my $file_type      = defined $results->[0]->[3] ? $results->[0]->[3] : "";
	my $file_mtime     = defined $results->[0]->[4] ? $results->[0]->[4] : "";
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
		file_uuid   => $file_uuid,
		file_size   => $file_size, 
		file_md5sum => $file_md5sum,
		file_type   => $file_type, 
		file_mtime  => $file_mtime, 
	}});
	
	# If I have the file_uuid, and we've been asked to delete it everywhere, mark it as DELETEd in the 
	# database. This way, if anything goes wrong below, future runs will try (again) to delete the file 
	# itself. If it's only beind deleted locally, and it fails for some reason, there will be no attempt
	# to try again.
	if ($file_uuid)
	{
		# Yup.
		($file_uuid) = $anvil->Database->insert_or_update_files({
			file_uuid      => $file_uuid, 
			file_name      => $file_name, 
			file_directory => $file_directory, 
			file_size      => $file_size, 
			file_md5sum    => $file_md5sum, 
			file_type      => "DELETED", 
			file_mtime     => $file_mtime, 
		});
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 3, list => { file_uuid => $file_uuid }});
	}
	
	# Does the file exist?
	if (-e $full_path)
	{
		# Delete it.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0263", variables => { file => $full_path }});
		
		unlink $full_path;
		
		# Sleep and verify
		sleep 1;
		if (-e $full_path)
		{
			# Failed to delete...
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, priority => "err", key => "log_0284"});
			return("");
		}
		else
		{
			# Deleted successfully.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0283"});
		}
	}
	
	# Now, if I have a file_uuid, delete it from file_locations if it exists. It's ok if peers in an 
	# Anvil! haven't deleted yet, as they'll see the file marked as 'DELETED' and purge their local 
	# copies.
	if ($file_uuid)
	{
		# Delete the entry from file_locations, if needed.
		my $query = "DELETE FROM file_locations WHERE file_location_file_uuid = ".$anvil->Database->quote($file_uuid).";";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
		$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
	}
	
	return(0);
}

# This handles renaming files.
sub handle_rename
{
	my ($anvil) = @_;
	
	# Do we have the current file name and the new one?
	if (not $anvil->data->{switches}{file})
	{
		# Um...
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0049"});
		$anvil->Job->update_progress({
			progress => 0, 
			message  => "error_0049", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 3});
	}
	elsif (not $anvil->data->{switches}{to})
	{
		# We need a target
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0050", variables => { file => $anvil->data->{switches}{file} }});
		$anvil->Job->update_progress({
			progress => 0, 
			message  => "error_0050,!!file!".$anvil->data->{switches}{file}."!!", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 4});
	}
	elsif (not -f $anvil->data->{switches}{file})
	{
		# The file to rename doesn't exist.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0051", variables => { file => $anvil->data->{switches}{file} }});
		$anvil->Job->update_progress({
			progress => 0, 
			message  => "error_0051,!!file!".$anvil->data->{switches}{file}."!!", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 5});
	}
	elsif (-e $anvil->data->{switches}{to})
	{
		# There's already a file (or directory or something) with that name.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 0, key => "error_0056", variables => { file => $anvil->data->{switches}{file}, to => $anvil->data->{switches}{to} }});
		$anvil->Job->update_progress({
			progress => 0, 
			message  => "error_0056,!!file!".$anvil->data->{switches}{file}."!!,!!to!".$anvil->data->{switches}{to}."!!", 
			job_uuid => $anvil->data->{jobs}{'job-uuid'},
		});
		$anvil->nice_exit({exit_code => 6});
	}
	
	### TODO: Left off here
	
	return(0);
}