mirror of
https://codeberg.org/scip/note.git
synced 2025-12-17 20:51:02 +01:00
ADDED: NOTEDB::binary. so now 0.8 is ready for shipping !
FIXED: regexp bug fixed. It was only possible to delete 2 items together
separated by comma ("d 1,2,3,4" deleted only 1,2!).
ADDED: Some new config options which reflects the new module structure.
So you can change your database backend without the need to
replace the note script itself.
FIXED: the previously added feature "cd <topic>" didn't really work :-(
ADDED: NOTEDB::mysql added. Perlmodule, which I will use within
note from now on instead of buildin functions for accessing the
database. From now on I only need to maintain one version of
note, since the module interface will be identical between the
bin and sql version.
CHANGED: The SQL code does not use Mysql.pm anymore. Instead it is coded
using the more portable DBI module. This allows one easily to
switch to anther database, which is supported by DBI.
CHANGED: Locking. The db-table will now be locked before note accesses it.
FIXED: width of listings is now always the same independent of the string-
length of a certain note.
This commit is contained in:
TLINDEN
258
NOTEDB/mysql.pm
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258
NOTEDB/mysql.pm
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#!/usr/bin/perl
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use DBI;
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use strict;
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use Data::Dumper;
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package NOTEDB;
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# Globals:
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my ($DB, $table, $fnum, $fnote, $fdate, $version);
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$table = "note";
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$fnum = "number";
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$fnote = "note";
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$fdate = "date";
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$version = "(NOTEDB::mysql, 1.0)";
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# prepare some std statements... #####################################################################
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my $sql_getsingle = "SELECT $fnote,$fdate FROM $table WHERE $fnum = ?";
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my $sql_all = "SELECT $fnum,$fnote,$fdate FROM $table";
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my $sql_nextnum = "SELECT max($fnum) FROM $table";
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my $sql_incrnum = "SELECT $fnum FROM $table ORDER BY $fnum";
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my $sql_search = "SELECT DISTINCT $fnum,$fnote,$fdate FROM $table WHERE $fnote LIKE ?";
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my $sql_setnum = "UPDATE $table SET $fnum = ? WHERE $fnum = ?";
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my $sql_edit = "UPDATE $table SET $fnote = ?, $fdate = ? WHERE $fnum = ?";
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my $sql_insertnew = "INSERT INTO $table VALUES (?, ?, ?)";
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my $sql_del = "DELETE FROM $table WHERE $fnum = ?";
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######################################################################################################
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sub new
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{
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# no prototype, because of the bin-version, which takes only a filename!
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my($this, $dbdriver, $dbname, $dbhost, $dbuser, $dbpasswd) = @_;
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my $class = ref($this) || $this;
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my $self = {};
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bless($self,$class);
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my $database = "DBI:$dbdriver:$dbname;host=$dbhost";
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$DB = DBI->connect($database, $dbuser, $dbpasswd) || die DBI->errstr();
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# LOCK the database!
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my $lock = $DB->prepare("LOCK TABLES $table WRITE") || die $DB->errstr();
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$lock->execute() || die $DB->errstr();
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return $self;
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}
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sub DESTROY
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{
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# clean the desk!
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my $unlock = $DB->prepare("UNLOCK TABLES") || die $DB->errstr;
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$unlock->execute() || die $DB->errstr();
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$DB->disconnect || die $DB->errstr;
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}
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sub version {
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return $version;
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}
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sub get_single
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{
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my($this, $num) = @_;
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my($note, $date);
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my $statement = $DB->prepare($sql_getsingle) || die $DB->errstr();
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$statement->execute($num) || die $DB->errstr();
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$statement->bind_columns(undef, \($note, $date)) || die $DB->errstr();
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while($statement->fetch) {
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return $note, $date;
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}
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}
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sub get_all
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{
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my($this, $num, $note, $date, %res);
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my $statement = $DB->prepare($sql_all) || die $DB->errstr();
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$statement->execute || die $DB->errstr();
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$statement->bind_columns(undef, \($num, $note, $date)) || die $DB->errstr();
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while($statement->fetch) {
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$res{$num}->{'note'} = $note;
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$res{$num}->{'date'} = $date;
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}
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return %res;
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}
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sub get_nextnum
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{
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my($this, $num);
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my $statement = $DB->prepare($sql_nextnum) || die $DB->errstr();
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$statement->execute || die $DB->errstr();
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$statement->bind_columns(undef, \($num)) || die $DB->errstr();
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while($statement->fetch) {
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return $num+1;
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}
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}
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sub get_search
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{
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my($this, $searchstring) = @_;
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my($num, $note, $date, %res);
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$searchstring = "\%$searchstring\%";
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my $statement = $DB->prepare($sql_search) || die $DB->errstr();
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$statement->execute($searchstring) || die $DB->errstr();
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$statement->bind_columns(undef, \($num, $note, $date)) || die $DB->errstr();
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while($statement->fetch) {
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$res{$num}->{'note'} = $note;
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$res{$num}->{'date'} = $date;
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}
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return %res;
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}
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sub set_recountnums
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{
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my $this = shift;
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my(@count, $i, $num, $setnum);
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$setnum = 1;
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my $statement = $DB->prepare($sql_incrnum) || die $DB->errstr();
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my $sub_statement = $DB->prepare($sql_setnum) || die $DB->errstr();
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$statement->execute || die $DB->errstr();
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$statement->bind_columns(undef, \($num)) || die $DB->errstr();
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while($statement->fetch) {
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$sub_statement->execute($setnum,$num) || die $DB->errstr();
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$setnum++;
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}
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}
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sub set_edit
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{
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my($this, $num, $note, $date) = @_;
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my $statement = $DB->prepare($sql_edit) || die $DB->errstr();
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$note =~ s/'/\'/g;
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$note =~ s/\\/\\\\/g;
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$statement->execute($note, $date, $num) || die $DB->errstr();
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}
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sub set_new
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{
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my($this, $num, $note, $date) = @_;
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my $statement = $DB->prepare($sql_insertnew) || die $DB->errstr();
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$note =~ s/'/\'/g;
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$note =~ s/\\/\\\\/g;
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$statement->execute($num, $note, $date) || die $DB->errstr();
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}
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sub set_del
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{
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my($this, $num) = @_;
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my($note, $date, $T);
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my $stat = $DB->prepare($sql_getsingle) || die $DB->errstr();
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$stat->execute($num) || die $DB->errstr();
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$stat->bind_columns(undef, \($note, $date)) || die $DB->errstr();
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while($stat->fetch) {
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$T = $date;
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}
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my $statement = $DB->prepare($sql_del) || die $DB->errstr();
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$statement->execute($num) || die $DB->errstr();
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$this->set_recountnums();
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return "ERROR" if($T eq ""); # signal success!
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}
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1; # keep this!
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__END__
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=head1 NAME
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NOTEDB::mysql - module lib for accessing a notedb from perl
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=head1 SYNOPSIS
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# include the module
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use NOTEDB;
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# create a new NOTEDB object (the last 4 params are db table/field names)
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$db = new NOTEDB("mysql","note","localhost","username","password","note","number","note","date");
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# get a single note
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($note, $date) = $db->get_single(1);
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# search for a certain note
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%matching_notes = $db->get_search("somewhat");
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# format of returned hash:
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#$matching_notes{$numberofnote}->{'note' => 'something', 'date' => '23.12.2000 10:33:02'}
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# get all existing notes
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%all_notes = $db->get_all();
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# format of returnes hash like the one from get_search above
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# get the next noteid available
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$next_num = $db->get_nextnum();
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# recount all noteids starting by 1 (usefull after deleting one!)
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$db->set_recountnums();
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# modify a certain note
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$db->set_edit(1, "any text", "23.12.2000 10:33:02");
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# create a new note
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$db->set_new(5, "any new text", "23.12.2000 10:33:02");
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# delete a certain note
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$db->set_del(5);
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=head1 DESCRIPTION
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You can use this module for accessing a note database. There are currently
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two versions of this module, one version for a SQL database and one for a
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binary file (note's own database-format).
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However, both versions provides identical interfaces, which means, you do
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not need to change your code, if you want to switch to another database format.
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Currently, NOTEDB module is only used by note itself. But feel free to use it
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within your own project! Perhaps someone want to implement a webinterface to
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note...
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=head1 USAGE
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please see the section SYNOPSIS, it says it all.
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=head1 AUTHOR
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Thomas Linden <tom@daemon.de>.
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=cut
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