newsstats/groupstats.pl

#! /usr/bin/perl -W
#
# groupstats.pl
#
# This script will get statistical data on newgroup usage
# from a database.
# 
# It is part of the NewsStats package.
#
# Copyright (c) 2010 Thomas Hochstein <thh@inter.net>
#
# It can be redistributed and/or modified under the same terms under 
# which Perl itself is published.

BEGIN {
  our $VERSION = "0.01";
  use File::Basename;
  push(@INC, dirname($0));
}
use strict;

use NewsStats qw(:DEFAULT :TimePeriods :Output :SQLHelper);

use DBI;

################################# Main program #################################

### read commandline options
my %Options = &ReadOptions('m:p:an:o:t:l:b:iscqdf:g:');

### read configuration
my %Conf = %{ReadConfig('newsstats.conf')};

### override configuration via commandline options
my %ConfOverride;
$ConfOverride{'DBTableGrps'}  = $Options{'g'} if $Options{'g'};
&OverrideConfig(\%Conf,\%ConfOverride);

### check for incompatible command line options
# you can't mix '-t', '-b' and '-l'
# -b/-l take preference over -t, and -b takes preference over -l
# you can't use '-f' with '-b' or '-l'
if ($Options{'b'} or $Options{'l'}) {
  if ($Options{'f'}) {
    # drop -f
    warn ("$MySelf: W: You cannot save the report to monthly files when using top lists (-b) or levels (-l). Filename template '-f $Options{'f'}' was ignored.\n");
    undef($Options{'f'});
  };
  if ($Options{'t'}) {
    # drop -t
    warn ("$MySelf: W: You cannot combine thresholds (-t) and top lists (-b) or levels (-l). Threshold '-t $Options{'t'}' was ignored.\n");
    undef($Options{'t'});
  };
  if ($Options{'b'} and $Options{'l'}) {
    # drop -l
    warn ("$MySelf: W: You cannot combine top lists (-b) and levels (-l). Level '-l $Options{'l'}' was ignored.\n");
    undef($Options{'l'});
  };
  # -q/-d don't work with -b or -l
  warn ("$MySelf: W: Sorting by number of postings (-q) ignored due to top list mode (-b) / levels (-l).\n") if $Options{'q'};
  warn ("$MySelf: W: Reverse sorting (-d) ignored due to top list mode (-b) / levels (-l).\n") if $Options{'d'};
};

### check output type
# default output type to 'pretty'
$Options{'o'} = 'pretty' if !$Options{'o'};
# fail if more than one newsgroup is combined with 'dumpgroup' type
die ("$MySelf: E: You cannot combine newsgroup lists (-n) with more than one group with '-o dumpgroup'!\n") if ($Options{'o'} eq 'dumpgroup' and defined($Options{'n'}) and $Options{'n'} =~ /:|\*/);
# accept 'dumpgroup' only with -n
if ($Options{'o'} eq 'dumpgroup' and !defined($Options{'n'})) {
  $Options{'o'} = 'dump';
  warn ("$MySelf: W: You must submit exactly one newsgroup ('-n news.group') for '-o dumpgroup'. Output type was set to 'dump'.\n");
};
# set output type to 'pretty' for -l
if ($Options{'l'} and $Options{'o'} ne 'pretty') {
  $Options{'o'} = 'pretty';
  warn ("$MySelf: W: Output type forced to '-o pretty' due to usage of '-l'.\n");
};
# set output type to 'dump' for -f
if ($Options{'f'} and $Options{'o'} ne 'dump') {
  $Options{'o'} = 'dump';
  warn ("$MySelf: W: Output type forced to '-o dump' due to usage of '-f'.\n");
};

### init database
my $DBHandle = InitDB(\%Conf,1);

### get time period
my ($StartMonth,$EndMonth);
# if '-a' is set, set start/end month from database
# FIXME - it doesn't make that much sense to get first/last month from database to query it
#         with a time period that equals no time period ...
if ($Options{'a'}) {
  undef($Options{'m'});
  undef($Options{'p'});
  my $DBQuery = $DBHandle->prepare(sprintf("SELECT MIN(month),MAX(month) FROM %s.%s",$Conf{'DBDatabase'},$Conf{'DBTableGrps'}));
  $DBQuery->execute or die sprintf("$MySelf: E: Can't get MIN/MAX month from %s.%s: %s\n",$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$DBI::errstr);
  ($StartMonth,$EndMonth) = $DBQuery->fetchrow_array;
} else {
  ($StartMonth,$EndMonth) = &GetTimePeriod($Options{'m'},$Options{'p'});
};
# if -p or -a are set: drop -m
undef $Options{'m'} if ($Options{'p'} or $Options{'a'});
# if time period is more than one month: force output type to '-o pretty' or '-o dumpgroup'
if ($Options{'o'} eq 'dump' and ($Options{'p'} or $Options{'a'})) {
  if (defined($Options{'n'}) and $Options{'n'} !~ /:|\*/) {
    # just one newsgroup is defined
    warn ("$MySelf: W: You cannot combine time periods (-p) with '-o dump', changing output type to '-o dumpgroup'.\n");
    $Options{'o'} = 'dumpgroup';
  } elsif (!defined($Options{'f'})) {
    # more than one newsgroup - and no file output
    warn ("$MySelf: W: You cannot combine time periods (-p) with '-o dump', changing output type to '-o pretty'.\n");
    $Options{'o'} = 'pretty';
  }
};

### create report
# get list of newsgroups (-n)
my ($QueryGroupList,$QueryThreshold,@GroupList,@Params);
my $Newsgroups = $Options{'n'};
if ($Newsgroups) {
  # explode list of newsgroups for WHERE clause
  ($QueryGroupList,@GroupList) = &SQLGroupList($Newsgroups);
} else {
  # set to dummy value (always true)
  $QueryGroupList = 1;
};

# manage thresholds
if (defined($Options{'t'})) {
  if ($Options{'i'}) {
    # -i: list groups below threshold
    $QueryThreshold .= ' postings < ?';
  } else {
    # default: list groups above threshold
    $QueryThreshold .= ' postings > ?';
  };
  # push threshold to Params
  push @Params,$Options{'t'};
} else {
  # set to dummy value (always true)
  $QueryThreshold = 1;  
}

# construct WHERE clause
# $QueryGroupList is "list of newsgroup" (or 1),
# $QueryThreshold is threshold definition (or 1),
# &SQLHierarchies() takes care of the exclusion of hierarchy levels (.ALL)
# according to setting of -s
my $WhereClause = sprintf('month BETWEEN ? AND ? AND %s AND %s %s',$QueryGroupList,$QueryThreshold,&SQLHierarchies($Options{'s'}));

# get length of longest newsgroup delivered by query for formatting purposes
# FIXME
my $MaxLength = &GetMaxLength($DBHandle,$Conf{'DBTableGrps'},'newsgroup',$WhereClause,$StartMonth,$EndMonth,(@GroupList,@Params));

my ($OrderClause,$DBQuery);
# -b (best of / top list) defined?
if (!defined($Options{'b'}) and !defined($Options{'l'})) {
  # default: neither -b nor -l
  # set ordering (ORDER BY) to "newsgroups" or "postings", "ASC" or "DESC"
  # according to -q and -d
  $OrderClause = 'newsgroup';
  $OrderClause = 'postings' if $Options{'q'};
  $OrderClause .= ' DESC' if $Options{'d'};
  # prepare query: get number of postings per group from groups table for given months and newsgroups
  $DBQuery = $DBHandle->prepare(sprintf("SELECT month,newsgroup,postings FROM %s.%s WHERE %s ORDER BY month,%s",$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$WhereClause,$OrderClause));
} elsif ($Options{'b'}) {
  # -b is set (then -l can't be!)
  # set sorting order (-i): top or flop list?
  if ($Options{'i'}) {
    $OrderClause = 'postings';
  } else {
    $OrderClause = 'postings DESC';
  };
  # set -b to 10 if < 1 (Top 10)
  $Options{'b'} = 10 if $Options{'b'} !~ /^\d*$/ or $Options{'b'} < 1;
  # push LIMIT to Params
  push @Params,$Options{'b'};
  # prepare query: get sum of postings per group from groups table for given months and newsgroups with LIMIT
  $DBQuery = $DBHandle->prepare(sprintf("SELECT newsgroup,SUM(postings) AS postings FROM %s.%s WHERE %s GROUP BY newsgroup ORDER BY %s,newsgroup LIMIT ?",$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$WhereClause,$OrderClause));
} else {
  # -l must be set now, as all other cases have been taken care of
  # which kind of level (-i): more than -l x or less than -l x?
  my ($Level);
  if ($Options{'i'}) {
    $Level = '<';
  } else {
    $Level = '>';
  };
  # prepare and execute query: get list of newsgroups meeting level condition
  $DBQuery = $DBHandle->prepare(sprintf("SELECT newsgroup FROM %s.%s WHERE %s GROUP BY newsgroup HAVING MAX(postings) %s ?",$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$WhereClause,$Level));
  $DBQuery->execute($StartMonth,$EndMonth,@GroupList,$Options{'l'})
    or die sprintf("$MySelf: E: Can't get groups data for %s to %s from %s.%s: %s\n",$StartMonth,$EndMonth,$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$DBI::errstr);
  # add newsgroups to a comma-seperated list ready for IN(...) query
  my $GroupList;
  while (my ($Newsgroup) = $DBQuery->fetchrow_array) {
    $GroupList .= ',' if (defined($GroupList) and $GroupList ne '');
    $GroupList .= "'$Newsgroup'";
  };
  $DBQuery = $DBHandle->prepare(sprintf("SELECT month,newsgroup,postings FROM %s.%s WHERE newsgroup IN (%s) AND %s ORDER BY newsgroup,month",$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$GroupList,$WhereClause));
};

# execute query
$DBQuery->execute($StartMonth,$EndMonth,@GroupList,@Params)
  or die sprintf("$MySelf: E: Can't get groups data for %s to %s from %s.%s: %s\n",$StartMonth,$EndMonth,$Conf{'DBDatabase'},$Conf{'DBTableGrps'},$DBI::errstr);

# output results
# reset caption (-c) if -f is set
undef($Options{'c'}) if $Options{'f'};
# print caption (-c) with time period if -m or -p is set
if ($Options{'c'}) {
  if ($Options{'m'}) {
    printf ("----- Report for %s\n",$StartMonth);
  } else {
    printf ("----- Report from %s to %s %s\n",$StartMonth,$EndMonth,$Options{'a'} ? '(all months)' : '');
  };
};
# print caption (-c) with newsgroup list if -n is set
printf ("----- Newsgroups: %s\n",join(',',split(/:/,$Newsgroups))) if $Options{'c'} and $Options{'n'};
# print caption (-c) with threshold if -t is set, taking -i in account
printf ("----- Threshold: %s %u\n",$Options{'i'} ? '<' : '>',$Options{'t'}) if $Options{'c'} and $Options{'t'};
if (!defined($Options{'b'})  and !defined($Options{'l'})) {
  # default: neither -b nor -l
  &OutputData($Options{'o'},$Options{'f'},$DBQuery,$MaxLength);
} elsif ($Options{'b'}) {
  # -b is set (then -l can't be!)
  # we have to read in the query results ourselves, as they do not have standard layout
  while (my ($Newsgroup,$Postings) = $DBQuery->fetchrow_array) {
    # we just assign "top x" or "bottom x" instead of a month for the caption and force an output type of pretty
    print &FormatOutput('pretty', ($Options{'i'} ? 'Bottom ' : 'Top ').$Options{'b'}, $Newsgroup, $Postings, $MaxLength);
  };
} else {
  # -l must be set now, as all other cases have been taken care of
  # print caption (-c) with level, taking -i in account
  printf ("----- Newsgroups with %s than %u postings over the whole time period\n",$Options{'i'} ? 'less' : 'more',$Options{'l'}) if $Options{'c'};
  # we have to read in the query results ourselves, as they do not have standard layout
  while (my ($Month,$Newsgroup,$Postings) = $DBQuery->fetchrow_array) {
    # we just switch $Newsgroups and $Month for output generation
    print &FormatOutput($Options{'o'}, $Newsgroup, $Month, $Postings, 7);
  };
};

### close handles
$DBHandle->disconnect;

__END__

################################ Documentation #################################

=head1 NAME

groupstats - create reports on newsgroup usage

=head1 SYNOPSIS

B<groupstats> [B<-Vhiscqd>] [B<-m> I<YYYY-MM> | B<-p> I<YYYY-MM:YYYY-MM> | B<-a>] [B<-n> I<newsgroup(s)>] [B<-t> I<threshold>] [B<-l> I<level>] [B<-b> I<number>] [B<-o> I<output type>] [B<-f> I<filename template>] [B<-g> I<database table>]

=head1 REQUIREMENTS

See doc/README: Perl 5.8.x itself and the following modules from CPAN:

=over 2

=item -

Config::Auto

=item -

DBI

=back

=head1 DESCRIPTION

This script create reports on newsgroup usage (number of postings per
group per month) taken from result tables created by
F<gatherstats.pl>.

The time period to act on defaults to last month; you can assign
another month via the B<-m> switch or a time period via the B<-p>
switch; the latter takes preference.

B<groupstats> will process all newsgroups by default; you can limit
that to only some newsgroups by supplying a list of those groups via
B<-n> (see below). You can include hierarchy levels in the output by
adding the B<-s> switch (see below).

Furthermore you can set a threshold via B<-t> so that only newsgroups
with more postings per month will be included in the report. You can
invert that by the B<-i> switch so only newsgroups with less than
I<threshold> postings per month will be included.

You can sort the output by number of postings per month instead of the
default (alphabetical list of newsgroups) by using B<-q>; you can
reverse the sorting order (from highest to lowest or in reversed
alphabetical order) by using B<-d>.

Furthermore, you can create a list of newsgroups that had consistently
more (or less) than x postings per month during the whole report
period by using B<-l> (together with B<i> as needed).

Last but not least you can create a "best of" list of the top x
newsgroups via B<-b> (or a "worst of" list by adding B<i>).

By default, B<groupstats> will dump an alphabetical list of newsgroups,
one per line, followed by the number of postings in that group, for
every month. You can change the output format by using B<-o> (see
below). Captions can be added by setting the B<-c> switch.

=head2 Configuration

B<groupstats> will read its configuration from F<newsstats.conf>
which should be present in the same directory via Config::Auto.

See doc/INSTALL for an overview of possible configuration options.

You can override configuration options via the B<-g> switch.

=head1 OPTIONS

=over 3

=item B<-V> (version)

Print out version and copyright information on B<yapfaq> and exit.

=item B<-h> (help)

Print this man page and exit.

=item B<-m> I<YYYY-MM> (month)

Set processing period to a month in YYYY-MM format. Ignored if B<-p>
or B<-a> is set.

=item B<-p> I<YYYY-MM:YYYY-MM> (period)

Set processing period to a time period between two month, each in
YYYY-MM format, separated by a colon. Overrides B<-m>. Ignored if
B<-a> is set.

=item B<-a> (all)

Set no processing period (process whole database). Overrides B<-m>
and B<-p>.

=item B<-n> I<newsgroup(s)> (newsgroups)

Limit processing to a certain set of newsgroups. I<newsgroup(s)> can
be a single newsgroup name (de.alt.test), a newsgroup hierarchy
(de.alt.*) or a list of either of these, separated by colons, for
example

   de.test:de.alt.test:de.newusers.*

=item B<-t> I<threshold> (threshold)

Only include newsgroups with more than I<threshold> postings per
month. Can be inverted by the B<-i> switch so that only newsgroups
with less than I<threshold> postings will be included.

This setting will be ignored if B<-l> or B<-b> is set.

=item B<-l> I<level> (level)

Only include newsgroups with more than I<level> postings per
month, every month during the whole reporting period. Can be inverted
by the B<-i> switch so that only newsgroups with less than I<level>
postings every single month will be included. Output will be ordered
by newsgroup name, followed by month.

This setting will be ignored if B<-b> is set. Overrides B<-t> and
can't be used together with B<-q>, B<-d> or B<-f>.

=item B<-b> I<n> (best of)

Create a list of the I<n> newsgroups with the most postings over the
whole reporting period. Can be inverted by the B<-i> switch so that a
list of the I<n> newsgroups with the least postings over the whole
period is generated. Output will be ordered by sum of postings.

Overrides B<-t> and B<-l> and can't be used together with B<-q>, B<-d>
or B<-f>. Output format is set to I<pretty> (see below).

=item B<-i> (invert)

Used in conjunction with B<-t>, B<-l> or B<-b> to set a lower
threshold or level or generate a "bottom list" instead of a top list.

=item B<-s> (sum per hierarchy level)

Include "virtual" groups for every hierarchy level in output, for
example:

    de.alt.ALL 10
    de.alt.test 5
    de.alt.admin 7

See the B<gatherstats> man page for details.

=item B<-o> I<output type> (output format)

Set output format. Default is I<pretty>, which will print a header for
each new month, followed by an alphabetical list of newsgroups, each
on a new line, followed by the number of postings in that month.
B<groupstats> will try to align newsgroup names and posting counts.
Usage of B<-b> will force this format; it cannot be used together with
B<-f>.

I<dump> format is used to create an easily parsable output consisting
of an alphabetical list of newsgroups, each on a new line, followed by
the number of postings in that month, without any alignment. This
default format can't be used with time periods of more than one month.
Usage of B<-f> will force this format.

I<list> format is like I<dump>, but will print the month in front of
the newsgroup name.

I<dumpgroup> format can only be use with a group list (see B<-n>) of
exactly one newsgroup and is like I<dump>, but will output months,
followed by the number of postings.

=item B<-c> (captions)

Add captions to output (reporting period, newsgroups list, threshold
and so on).

This setting will be ignored if B<-f> is set.

=item B<-q> (quantity of postings)

Sort by number of postings instead of by newsgroup names.

Cannot be used with B<-l> or B<-b>.

=item B<-d> (descending)

Change sort order to descending.

Cannot be used with B<-l> or B<-b>.

=item B<-f> I<filename template> (output file)

Save output to file instead of dumping it to STDOUT. B<groupstats>
will create one file for each month, with filenames composed by
adding year and month to the I<filename template>, for example
with B<-f> I<stats>:

    stats-2010-01
    stats-2010-02
    ... and so on

This setting will be ignored if B<-l> or B<-b> is set. Output format
is set to I<dump> (see above).

=item B<-g> I<table> (postings per group table)

Override I<DBTableGrps> from F<newsstats.conf>.

=back

=head1 INSTALLATION

See doc/INSTALL.

=head1 EXAMPLES

Show number of postings per group for lasth month in I<dump> format:

    groupstats

Show that report for January of 2010 and de.alt.* plus de.test,
including display of hierarchy levels:

    groupstats -m 2010-01 -n de.alt.*:de.test -s

Show that report for the year of 2010 in I<pretty> format:

    groupstats -p 2010-01:2010-12 -o pretty

Only show newsgroups with less than 30 postings last month, ordered
by number of postings, descending, in I<pretty> format:

    groupstats -iqdt 30 -o pretty

Show top 10 for the first half-year of of 2010 in I<pretty> format:

    groupstats -p 2010-01:2010-06 -b 10 -o pretty

Report all groups that had less than 30 postings every singele month
in the year of 2010 (I<pretty> format is forced)

    groupstats -p 2010-01:2010-12 -il 30

=head1 FILES

=over 4

=item F<groupstats.pl>

The script itself.

=item F<NewsStats.pm>

Library functions for the NewsStats package.

=item F<newsstats.conf>

Runtime configuration file for B<yapfaq>.

=back

=head1 BUGS

Please report any bugs or feature requests to the author or use the
bug tracker at L<http://bugs.th-h.de/>!

=head1 SEE ALSO

=over 2

=item -

doc/README

=item -

doc/INSTALL

=item -

gatherstats -h

=back

This script is part of the B<NewsStats> package.

=head1 AUTHOR

Thomas Hochstein <thh@inter.net>

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2010 Thomas Hochstein <thh@inter.net>

This program is free software; you may redistribute it and/or modify it
under the same terms as Perl itself.

=cut