# --
# Kernel/System/Ticket/ArticleStorageDB.pm - article storage module for OTRS kernel
# Copyright (C) 2002-2004 Martin Edenhofer <martin+code@otrs.org>
# --
# $Id: ArticleStorageDB.pm,v 1.12 2004/02/13 00:50:36 martin Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see 
# the enclosed file COPYING for license information (GPL). If you 
# did not receive this file, see http://www.gnu.org/licenses/gpl.txt.
# --

package Kernel::System::Ticket::ArticleStorageDB;

use strict;
use MIME::Base64;
use MIME::Words qw(:all);

use vars qw($VERSION);
$VERSION = '$Revision: 1.12 $';
$VERSION =~ s/^\$.*:\W(.*)\W.+?$/$1/;

# --
sub InitArticleStorage {
    my $Self = shift;
    my %Param = @_;
    # --
    # ArticleDataDir
    # --
    $Self->{ArticleDataDir} = $Self->{ConfigObject}->Get('ArticleDir')
       || die "Got no ArticleDir!";
    # --
    # create ArticleContentPath
    # --
    my ($Sec, $Min, $Hour, $Day, $Month, $Year) = localtime(time);
    $Self->{Year} = $Year+1900;
    $Self->{Month} = $Month+1;
    $Self->{Month}  = "0$Self->{Month}" if ($Self->{Month} <10);
    $Self->{Day} = $Day;
    $Self->{ArticleContentPath} = $Self->{Year}.'/'.$Self->{Month}.'/'. $Self->{Day};

    return 1;
}
# --
sub DeleteArticleOfTicket {
    my $Self = shift;
    my %Param = @_;
    # check needed stuff
    foreach (qw(TicketID UserID)) {
      if (!$Param{$_}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need $_!");
        return;
      }
    }
    # db quote
    foreach (keys %Param) {
        $Param{$_} = $Self->{DBObject}->Quote($Param{$_});
    }
    # delete attachments and plain emails
    my @Articles = $Self->GetArticleIndex(TicketID => $Param{TicketID});
    foreach (@Articles) {
        # delete from db
        $Self->{DBObject}->Do(SQL => "DELETE FROM article_attachment WHERE article_id = $_");
        $Self->{DBObject}->Do(SQL => "DELETE FROM article_plain WHERE article_id = $_");
        # delete from fs
        my $ContentPath = $Self->GetArticleContentPath(ArticleID => $_);
        system("rm -rf $Self->{ArticleDataDir}/$ContentPath/$_/*");
    } 
    # delete articles
    if ($Self->{DBObject}->Do(SQL => "DELETE FROM article WHERE ticket_id = $Param{TicketID}")) {
        # delete history´
        if ($Self->DeleteHistoryOfTicket(TicketID => $Param{TicketID})) {
            return 1;
        }
        else {
            return;
        }
    }
    else {
        return;
    }
}
# --
sub WriteArticlePlain {
    my $Self = shift;
    my %Param = @_;
    # check needed stuff
    foreach (qw(ArticleID Email UserID)) {
      if (!$Param{$_}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need $_!");
        return;
      }
    }
    # db quote
    foreach (keys %Param) {
        $Param{$_} = $Self->{DBObject}->Quote($Param{$_});
    }
    # write article to db 1:1
    if ($Self->{DBObject}->Do(SQL => "INSERT INTO article_plain ".
          " (article_id, body, create_time, create_by, change_time, change_by) " .
          " VALUES ".
          " ($Param{ArticleID}, '$Param{Email}', ".
          " current_timestamp, $Param{UserID}, current_timestamp, $Param{UserID})")) {
        return 1;
    }
    else {
        return;
    }
}
# --
sub WriteArticlePart {
    my $Self = shift;
    my %Param = @_;
    # check needed stuff
    foreach (qw(Content Filename ContentType ArticleID UserID)) {
      if (!$Param{$_}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need $_!");
        return;
      }
    }
    # check used name (we want just uniq names)
    my $NewFileName = decode_mimewords($Param{Filename});
    my %UsedFile = ();
    my %Index = $Self->GetArticleAtmIndex(ArticleID => $Param{ArticleID});
    foreach (keys %Index) {
        $UsedFile{$Index{$_}} = 1;
    }
    for (my $i=1; $i<=12; $i++) {
        if (exists $UsedFile{$NewFileName}) {
            $NewFileName = "$Param{Filename}-$i";
        }
        else {
            $i = 20;
        }
    }
    $Param{Filename} = $NewFileName;
    # encode attachemnt if it's a postgresql backend!!!
    if (!$Self->{DBObject}->GetDatabaseFunction('DirectBlob')) {
        $Param{Content} = encode_base64($Param{Content});
    }
    # db quote
    foreach (keys %Param) {
        $Param{$_} = $Self->{DBObject}->Quote($Param{$_});
    }
    # write attachment to db
    if ($Self->{DBObject}->Do(SQL => "INSERT INTO article_attachment ".
        " (article_id, filename, content_type, content, ".
        " create_time, create_by, change_time, change_by) " .
        " VALUES ".
        " ($Param{ArticleID}, '$Param{Filename}', '$Param{ContentType}', ".
        " '$Param{Content}', ".
        " current_timestamp, $Param{UserID}, current_timestamp, $Param{UserID})")) {
        return 1;
    }
    else {
        return;
    }
}
# --
sub GetArticlePlain {
    my $Self = shift;
    my %Param = @_;
    # check needed stuff
    if (!$Param{ArticleID}) {
      $Self->{LogObject}->Log(Priority => 'error', Message => "Need ArticleID!");
      return;
    }
    # prepare/filter ArticleID
    $Param{ArticleID} = quotemeta($Param{ArticleID});
    $Param{ArticleID} =~ s/\0//g;
    # get content path
    my $ContentPath = $Self->GetArticleContentPath(ArticleID => $Param{ArticleID});
    # open plain article
    my $Data = '';
    if (!open (DATA, "< $Self->{ArticleDataDir}/$ContentPath/$Param{ArticleID}/plain.txt")) {
        # can't open article
        # try database
        my $SQL = "SELECT body FROM article_plain ".
        " WHERE ".
        " article_id = ".$Self->{DBObject}->Quote($Param{ArticleID})."";
        $Self->{DBObject}->Prepare(SQL => $SQL);
        while (my @Row = $Self->{DBObject}->FetchrowArray()) {
            $Data = $Row[0];
        }
        if ($Data) {
            return $Data;
        }
        else {
            $Self->{LogObject}->Log(
              Priority => 'error', 
              Message => "Can't open $Self->{ArticleDataDir}/$ContentPath/$Param{ArticleID}/plain.txt: $!",
            );
            return;
        }
    }
    else {
        # read whole article
        while (<DATA>) {
            $Data .= $_;
        }
        close (DATA);
        return $Data;
    }
}
# --
sub GetArticleAtmIndex {
    my $Self = shift;
    my %Param = @_;
    # check ArticleContentPath
    if (!$Self->{ArticleContentPath}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need ArticleContentPath!");
        return;
    }
    # check needed stuff
    if (!$Param{ArticleID}) {
      $Self->{LogObject}->Log(Priority => 'error', Message => "Need ArticleID!");
      return;
    }
    # get ContentPath if not given
    if (!$Param{ContentPath}) {
        $Param{ContentPath} = $Self->GetArticleContentPath(ArticleID => $Param{ArticleID});
    }
    my %Index = ();
    my $Counter = 0;
    # try database
    my $SQL = "SELECT filename FROM article_attachment ".
        " WHERE ".
        " article_id = ".$Self->{DBObject}->Quote($Param{ArticleID})."".
        " ORDER BY id";
    $Self->{DBObject}->Prepare(SQL => $SQL);
    while (my @Row = $Self->{DBObject}->FetchrowArray()) {
        $Counter++;
        $Index{$Counter} = $Row[0];
    }
    # try fs (if there is no index in fs)
    if (!%Index) {
        my @List = glob("$Self->{ArticleDataDir}/$Param{ContentPath}/$Param{ArticleID}/*");
        foreach (@List) {
            $Counter++;
            s!^.*/!!;
            $Index{$Counter} = $_ if ($_ ne 'plain.txt');
        }
    }
    return %Index;
}
# --
sub GetArticleAttachment {
    my $Self = shift;
    my %Param = @_;
    # check needed stuff
    foreach (qw(ArticleID FileID)) {
      if (!$Param{$_}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need $_!");
        return;
      }
    }
    # prepare/filter ArticleID
    $Param{ArticleID} = quotemeta($Param{ArticleID});
    $Param{ArticleID} =~ s/\0//g;
    # get attachment index
    my %Index = $Self->GetArticleAtmIndex(ArticleID => $Param{ArticleID});
    # get content path
    my $ContentPath = $Self->GetArticleContentPath(ArticleID => $Param{ArticleID});
    my %Data; 
    my $Counter = 0;
    $Data{Filename} = $Index{$Param{FileID}}; 
    if (open (DATA, "< $Self->{ArticleDataDir}/$ContentPath/$Param{ArticleID}/$Index{$Param{FileID}}")) {
        while (<DATA>) {
            $Data{ContentType} = $_ if ($Counter == 0);
            $Data{Content} .= $_ if ($Counter > 0);
            $Counter++;
        }
        close (DATA);
        return %Data;
    }
    else {
        # try database
        my $SQL = "SELECT content_type, content FROM article_attachment ".
        " WHERE ".
        " article_id = ".$Self->{DBObject}->Quote($Param{ArticleID})."";
        $Self->{DBObject}->Prepare(SQL => $SQL, Limit => $Param{FileID});
        while (my @Row = $Self->{DBObject}->FetchrowArray()) {
            $Data{ContentType} = $Row[0];
            # decode attachemnt if it's e. g. a postgresql backend!!!
            if (!$Self->{DBObject}->GetDatabaseFunction('DirectBlob')) {
                $Data{Content} = decode_base64($Row[1]);
            }
            else {
                $Data{Content} = $Row[1];
            }
        }
        if ($Data{Content}) {
            return %Data;
        }
        else {
            $Self->{LogObject}->Log(
              Priority => 'error', 
              Message => "$!: $Self->{ArticleDataDir}/$ContentPath/$Param{ArticleID}/$Index{$Param{FileID}}!",
            );
            return;
        }
    }
}
# --

1;
