+++ /dev/null
-# NewsStats.pm
-#
-# Library functions for the NewsStats package.
-#
-# Copyright (c) 2010-2013 Thomas Hochstein <thh@inter.net>
-#
-# This module can be redistributed and/or modified under the same terms under
-# which Perl itself is published.
-
-package NewsStats;
-
-use strict;
-use warnings;
-our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
-
-require Exporter;
-@ISA = qw(Exporter);
-@EXPORT = qw(
- $MyVersion
- $PackageVersion
- $FullPath
- $HomePath
- ShowVersion
- ShowPOD
- ReadConfig
- OverrideConfig
- InitDB
- Bleat
-);
-@EXPORT_OK = qw(
- GetTimePeriod
- LastMonth
- SplitPeriod
- ListMonth
- ListNewsgroups
- ParseHierarchies
- ReadGroupList
- OutputData
- FormatOutput
- SQLHierarchies
- SQLSortOrder
- SQLGroupList
- SQLSetBounds
- SQLBuildClause
- GetMaxLength
-);
-%EXPORT_TAGS = ( TimePeriods => [qw(GetTimePeriod LastMonth SplitPeriod
- ListMonth)],
- Output => [qw(OutputData FormatOutput)],
- SQLHelper => [qw(SQLHierarchies SQLSortOrder SQLGroupList
- SQLSetBounds SQLBuildClause GetMaxLength)]);
-$VERSION = '0.01';
-our $PackageVersion = '0.01';
-
-use Data::Dumper;
-use File::Basename;
-
-use Config::Auto;
-use DBI;
-
-#####-------------------------------- Vars --------------------------------#####
-
-# trim the path
-our $FullPath = $0;
-our $HomePath = dirname($0);
-$0 =~ s%.*/%%;
-# set version string
-our $MyVersion = "$0 $::VERSION (NewsStats.pm $VERSION)";
-
-#####------------------------------- Basics -------------------------------#####
-
-################################################################################
-
-################################################################################
-sub ShowVersion {
-################################################################################
-### display version and exit
- print "NewsStats v$PackageVersion\n$MyVersion\n";
- print "Copyright (c) 2010-2012 Thomas Hochstein <thh\@inter.net>\n";
- print "This program is free software; you may redistribute it ".
- "and/or modify it under the same terms as Perl itself.\n";
- exit(100);
-};
-################################################################################
-
-################################################################################
-sub ShowPOD {
-################################################################################
-### feed myself to perldoc and exit
- exec('perldoc', $FullPath);
- exit(100);
-};
-################################################################################
-
-################################################################################
-sub ReadConfig {
-################################################################################
-### read config via Config::Auto
-### IN : $ConfFile: config filename
-### OUT: reference to a hash containing the configuration
- my ($ConfFile) = @_;
- # mandatory configuration options
- my @Mandatory = ('DBDriver','DBHost','DBUser','DBPw','DBDatabase',
- 'DBTableRaw','DBTableGrps');
- # read config via Config::Auto
- my $ConfR = Config::Auto::parse($ConfFile, format => 'equal');
- my %Conf = %{$ConfR};
- # check for mandatory options
- foreach (@Mandatory) {
- &Bleat(2,sprintf("Mandatory configuration option %s is not set!",$_))
- if (!defined($Conf{$_}));
- }
- # $Conf{'TLH'} is checked in gatherstats.pl
- return $ConfR;
-};
-################################################################################
-
-################################################################################
-sub OverrideConfig {
-################################################################################
-### override configuration values
-### IN : $ConfigR : reference to configuration hash
-### $OverrideR: reference to a hash containing overrides
- my ($ConfigR,$OverrideR) = @_;
- my %Override = %$OverrideR;
- # Config hash empty?
- &Bleat(1,"Empty configuration hash passed to OverrideConfig()")
- if ( keys %$ConfigR < 1);
- # return if no overrides
- return if (keys %Override < 1 or keys %$ConfigR < 1);
- foreach my $Key (keys %Override) {
- $$ConfigR{$Key} = $Override{$Key};
- };
-};
-################################################################################
-
-################################################################################
-sub InitDB {
-################################################################################
-### initialise database connection
-### IN : $ConfigR: reference to configuration hash
-### $Die : if TRUE, die if connection fails
-### OUT: DBHandle
- my ($ConfigR,$Die) = @_;
- my %Conf = %$ConfigR;
- my $DBHandle = DBI->connect(sprintf('DBI:%s:database=%s;host=%s',
- $Conf{'DBDriver'},$Conf{'DBDatabase'},
- $Conf{'DBHost'}), $Conf{'DBUser'},
- $Conf{'DBPw'}, { PrintError => 0 });
- if (!$DBHandle) {
- &Bleat(2,$DBI::errstr) if (defined($Die) and $Die);
- &Bleat(1,$DBI::errstr);
- };
- return $DBHandle;
-};
-################################################################################
-
-################################################################################
-sub Bleat {
-################################################################################
-### print warning or error messages and terminate in case of error
-### IN : $Level : 1 = warning, 2 = error
-### $Message: warning or error message
- my ($Level,$Message) = @_;
- if ($Level == 1) {
- warn "$0 W: $Message\n"
- } elsif ($Level == 2) {
- die "$0 E: $Message\n"
- } else {
- print "$0: $Message\n"
- }
-};
-################################################################################
-
-#####------------------------------ GetStats ------------------------------#####
-
-################################################################################
-sub ListNewsgroups {
-################################################################################
-### explode a (scalar) list of newsgroup names to a list of newsgroup and
-### hierarchy names where every newsgroup and hierarchy appears only once:
-### de.alt.test,de.alt.admin -> de.ALL, de.alt.ALL, de.alt.test, de.alt.admin
-### IN : $Newsgroups : a list of newsgroups (content of Newsgroups: header)
-### $TLH : top level hierarchy (all other newsgroups are ignored)
-### $ValidGroupsR: reference to a hash containing all valid newsgroups
-### as keys
-### OUT: %Newsgroups : hash containing all newsgroup and hierarchy names as keys
- my ($Newsgroups,$TLH,$ValidGroupsR) = @_;
- my %ValidGroups = %{$ValidGroupsR} if $ValidGroupsR;
- my %Newsgroups;
- chomp($Newsgroups);
- # remove whitespace from contents of Newsgroups:
- $Newsgroups =~ s/\s//;
- # call &HierarchyCount for each newsgroup in $Newsgroups:
- for (split /,/, $Newsgroups) {
- # don't count newsgroup/hierarchy in wrong TLH
- next if($TLH and !/^$TLH/);
- # don't count invalid newsgroups
- if(%ValidGroups and !defined($ValidGroups{$_})) {
- warn (sprintf("DROPPED: %s\n",$_));
- next;
- }
- # add original newsgroup to %Newsgroups
- $Newsgroups{$_} = 1;
- # add all hierarchy elements to %Newsgroups, amended by '.ALL',
- # i.e. de.alt.ALL and de.ALL
- foreach (ParseHierarchies($_)) {
- $Newsgroups{$_.'.ALL'} = 1;
- }
- };
- return %Newsgroups;
-};
-
-################################################################################
-sub ParseHierarchies {
-################################################################################
-### return a list of all hierarchy levels a newsgroup belongs to
-### (for de.alt.test.moderated that would be de/de.alt/de.alt.test)
-### IN : $Newsgroup : a newsgroup name
-### OUT: @Hierarchies: array containing all hierarchies the newsgroup belongs to
- my ($Newsgroup) = @_;
- my @Hierarchies;
- # strip trailing dots
- $Newsgroup =~ s/(.+)\.+$/$1/;
- # butcher newsgroup name by "." and add each hierarchy to @Hierarchies
- # i.e. de.alt.test: "de.alt" and "de"
- while ($Newsgroup =~ /\./) {
- $Newsgroup =~ s/^((?:\.?[^.]+)*)\.[^.]+$/$1/;
- push @Hierarchies, $Newsgroup;
- };
- return @Hierarchies;
-};
-
-################################################################################
-sub ReadGroupList {
-################################################################################
-### read a list of valid newsgroups from file (each group on one line,
-### ignoring everything after the first whitespace and so accepting files
-### in checkgroups format as well as (parts of) an INN active file)
-### IN : $Filename : file to read
-### OUT: \%ValidGroups: hash containing all valid newsgroups
- my ($Filename) = @_;
- my %ValidGroups;
- open (my $LIST,"<$Filename") or &Bleat(2,"Cannot read $Filename: $!");
- while (<$LIST>) {
- s/^\s*(\S+).*$/$1/;
- chomp;
- next if /^$/;
- $ValidGroups{$_} = '1';
- };
- close $LIST;
- return \%ValidGroups;
-};
-
-################################################################################
-
-#####----------------------------- TimePeriods ----------------------------#####
-
-################################################################################
-sub GetTimePeriod {
-################################################################################
-### get a time period to act on from --month option;
-### if empty, default to last month
-### IN : $Month: may be empty, 'YYYY-MM', 'YYYY-MM:YYYY-MM' or 'all'
-### OUT: $Verbal,$SQL: verbal description and WHERE-clause
-### of the chosen time period
- my ($Month) = @_;
- # define result variables
- my ($Verbal, $SQL);
- # define a regular expression for a month
- my $REMonth = '\d{4}-\d{2}';
-
- # default to last month if option is not set
- if(!$Month) {
- $Month = &LastMonth;
- }
-
- # check for valid input
- if ($Month =~ /^$REMonth$/) {
- # single month (YYYY-MM)
- ($Month) = &CheckMonth($Month);
- $Verbal = $Month;
- $SQL = sprintf("month = '%s'",$Month);
- } elsif ($Month =~ /^$REMonth:$REMonth$/) {
- # time period (YYYY-MM:YYYY-MM)
- $Verbal = sprintf('%s to %s',&SplitPeriod($Month));
- $SQL = sprintf("month BETWEEN '%s' AND '%s'",&SplitPeriod($Month));
- } elsif ($Month =~ /^all$/i) {
- # special case: ALL
- $Verbal = 'all time';
- $SQL = '';
- } else {
- # invalid input
- return (undef,undef);
- }
-
- return ($Verbal,$SQL);
-};
-
-################################################################################
-sub LastMonth {
-################################################################################
-### get last month from todays date in YYYY-MM format
-### OUT: last month as YYYY-MM
- # get today's date
- my (undef,undef,undef,undef,$Month,$Year,undef,undef,undef) = localtime(time);
- # $Month is already defined from 0 to 11, so no need to decrease it by 1
- $Year += 1900;
- if ($Month < 1) {
- $Month = 12;
- $Year--;
- };
- # return last month
- return sprintf('%4d-%02d',$Year,$Month);
-};
-
-################################################################################
-sub CheckMonth {
-################################################################################
-### check if input (in YYYY-MM form) is valid with MM between 01 and 12;
-### otherwise, fix it
-### IN : @Month: array of month
-### OUT: @Month: a valid month
- my (@Month) = @_;
- foreach my $Month (@Month) {
- my ($OldMonth) = $Month;
- my ($CalMonth) = substr ($Month, -2);
- if ($CalMonth < 1 or $CalMonth > 12) {
- $CalMonth = '12' if $CalMonth > 12;
- $CalMonth = '01' if $CalMonth < 1;
- substr($Month, -2) = $CalMonth;
- &Bleat(1,sprintf("'%s' is an invalid date (MM must be between '01' ".
- "and '12'), set to '%s'.",$OldMonth,$Month));
- }
- }
- return @Month;
-};
-
-################################################################################
-sub SplitPeriod {
-################################################################################
-### split a time period denoted by YYYY-MM:YYYY-MM into start and end month
-### IN : $Period: time period
-### OUT: $StartMonth, $EndMonth
- my ($Period) = @_;
- my ($StartMonth, $EndMonth) = split /:/, $Period;
- ($StartMonth,$EndMonth) = CheckMonth($StartMonth,$EndMonth);
- # switch parameters as necessary
- if ($EndMonth gt $StartMonth) {
- return ($StartMonth, $EndMonth);
- } else {
- return ($EndMonth, $StartMonth);
- };
-};
-
-################################################################################
-sub ListMonth {
-################################################################################
-### return a list of months (YYYY-MM) between start and end month
-### IN : $MonthExpression ('YYYY-MM' or 'YYYY-MM to YYYY-MM')
-### OUT: @Months: array containing all months from $MonthExpression enumerated
- my ($MonthExpression )= @_;
- # return if single month
- return ($MonthExpression) if ($MonthExpression =~ /^\d{4}-\d{2}$/);
- # parse $MonthExpression
- my ($StartMonth, $EndMonth) = split(' to ',$MonthExpression);
- # set $Year, $Month from $StartMonth
- my ($Year, $Month) = split /-/, $StartMonth;
- # define @Months
- my (@Months);
- until ("$Year-$Month" gt $EndMonth) {
- push @Months, "$Year-$Month";
- $Month = "$Month"; # force string context
- $Month++;
- if ($Month > 12) {
- $Month = '01';
- $Year++;
- };
- };
- return @Months;
-};
-
-#####---------------------------- OutputFormats ---------------------------#####
-
-################################################################################
-sub OutputData {
-################################################################################
-### read database query results from DBHandle and print results with formatting
-### IN : $Format : format specifier
-### $Comments : print or suppress all comments for machine-readable output
-### $GroupBy : primary sorting order (month or key)
-### $Precision: number of digits right of decimal point (0 or 2)
-### $ValidKeys: reference to a hash containing all valid keys
-### $FileTempl: file name template (--filetemplate): filetempl-YYYY-MM
-### $DBQuery : database query handle with executed query,
-### containing $Month, $Key, $Value
-### $PadField : padding length for key field (optional) for 'pretty'
-### $PadValue : padding length for value field (optional) for 'pretty'
- my ($Format, $Comments, $GroupBy, $Precision, $ValidKeys, $FileTempl,
- $DBQuery, $PadField, $PadValue) = @_;
- my %ValidKeys = %{$ValidKeys} if $ValidKeys;
- my ($FileName, $Handle, $OUT);
- our $LastIteration;
-
- # define output types
- my %LegalOutput;
- @LegalOutput{('dump','list','pretty')} = ();
- # bail out if format is unknown
- &Bleat(2,"Unknown output type '$Format'!") if !exists($LegalOutput{$Format});
-
- while (my ($Month, $Key, $Value) = $DBQuery->fetchrow_array) {
- # don't display invalid keys
- if(%ValidKeys and !defined($ValidKeys{$Key})) {
- # FIXME
- # &Bleat(1,sprintf("DROPPED: %s",$Key));
- next;
- };
- # care for correct sorting order and abstract from month and keys:
- # $Caption will be $Month or $Key, according to sorting order,
- # and $Key will be $Key or $Month, respectively
- my $Caption;
- if ($GroupBy eq 'key') {
- $Caption = $Key;
- $Key = $Month;
- } else {
- $Caption = $Month;
- }
- # set output file handle
- if (!$FileTempl) {
- $Handle = *STDOUT{IO}; # set $Handle to a reference to STDOUT
- } elsif (!defined($LastIteration) or $LastIteration ne $Caption) {
- close $OUT if ($LastIteration);
- # safeguards for filename creation:
- # replace potential problem characters with '_'
- $FileName = sprintf('%s-%s',$FileTempl,$Caption);
- $FileName =~ s/[^a-zA-Z0-9_-]+/_/g;
- open ($OUT,">$FileName")
- or &Bleat(2,sprintf("Cannot open output file '%s': $!",
- $FileName));
- $Handle = $OUT;
- };
- print $Handle &FormatOutput($Format, $Comments, $Caption, $Key, $Value,
- $Precision, $PadField, $PadValue);
- $LastIteration = $Caption;
- };
- close $OUT if ($FileTempl);
-};
-
-################################################################################
-sub FormatOutput {
-################################################################################
-### format information for output according to format specifier
-### IN : $Format : format specifier
-### $Comments : print or suppress all comments for machine-readable output
-### $Caption : month (as YYYY-MM) or $Key, according to sorting order
-### $Key : newsgroup, client, ... or $Month, as above
-### $Value : number of postings with that attribute
-### $Precision: number of digits right of decimal point (0 or 2)
-### $PadField : padding length for key field (optional) for 'pretty'
-### $PadValue : padding length for value field (optional) for 'pretty'
-### OUT: $Output: formatted output
- my ($Format, $Comments, $Caption, $Key, $Value, $Precision, $PadField,
- $PadValue) = @_;
- my ($Output);
- # keep last caption in mind
- our ($LastIteration);
- # create one line of output
- if ($Format eq 'dump') {
- # output as dump (key value)
- $Output = sprintf ("# %s:\n",$Caption)
- if ($Comments and (!defined($LastIteration) or $Caption ne $LastIteration));
- $Output .= sprintf ("%s %u\n",$Key,$Value);
- } elsif ($Format eq 'list') {
- # output as list (caption key value)
- $Output = sprintf ("%s %s %u\n",$Caption,$Key,$Value);
- } elsif ($Format eq 'pretty') {
- # output as a table
- $Output = sprintf ("# ----- %s:\n",$Caption)
- if ($Comments and (!defined($LastIteration) or $Caption ne $LastIteration));
- # increase $PadValue for numbers with decimal point
- $PadValue += $Precision+1 if $Precision;
- # add padding if $PadField is set; $PadValue HAS to be set then
- $Output .= sprintf ($PadField ?
- sprintf("%%-%us%%s %%%u.*f\n",$PadField,$PadValue) :
- "%s%s %.*f\n",$Key,$Comments ? ':' : '',
- $Precision,$Value);
- };
- return $Output;
-};
-
-#####------------------------- QueryModifications -------------------------#####
-
-################################################################################
-sub SQLHierarchies {
-################################################################################
-### add exclusion of hierarchy levels (de.alt.ALL) from SQL query by
-### amending the WHERE clause if $ShowHierarchies is false (or don't, if it is
-### true, accordingly)
-### IN : $ShowHierarchies: boolean value
-### OUT: SQL code
- my ($ShowHierarchies) = @_;
- return $ShowHierarchies ? '' : "newsgroup NOT LIKE '%.ALL'";
-};
-
-################################################################################
-sub GetMaxLength {
-################################################################################
-### get length of longest fields in future query result
-### IN : $DBHandle : database handle
-### $Table : table to query
-### $Field : field (key!, i.e. month, newsgroup, ...) to check
-### $Value : field (value!, i.e. postings) to check
-### $WhereClause : WHERE clause
-### $HavingClause: HAVING clause
-### @BindVars : bind variables for WHERE clause
-### OUT: $FieldLength : length of longest instance of $Field
-### $ValueLength : length of longest instance of $Value
- my ($DBHandle,$Table,$Field,$Value,$WhereClause,$HavingClause,@BindVars) = @_;
- my $DBQuery = $DBHandle->prepare(sprintf("SELECT MAX(LENGTH(%s)),".
- "MAX(%s) ".
- "FROM %s %s %s",$Field,,$Value,
- $Table,$WhereClause,$HavingClause ?
- 'GROUP BY newsgroup' . $HavingClause .
- ' ORDER BY LENGTH(newsgroup) '.
- 'DESC LIMIT 1': ''));
- $DBQuery->execute(@BindVars) or &Bleat(1,sprintf("Can't get field length ".
- "for '%s' from table '%s': ".
- "$DBI::errstr",$Field,$Table));
- my ($FieldLength,$ValueMax) = $DBQuery->fetchrow_array;
- my $ValueLength = length($ValueMax) if ($ValueMax);
- return ($FieldLength,$ValueLength);
-};
-
-################################################################################
-sub SQLSortOrder {
-################################################################################
-### build a SQL 'ORDER BY' clause from $OptGroupBy (primary sorting) and
-### $OptOrderBy (secondary sorting), both ascending or descending;
-### descending sorting order is done by adding '-desc'
-### IN : $GroupBy: primary sort by 'month' (default) or 'newsgroups'
-### $OrderBy: secondary sort by month/newsgroups (default)
-### or number of 'postings'
-### OUT: a SQL ORDER BY clause
- my ($GroupBy,$OrderBy) = @_;
- my ($GroupSort,$OrderSort) = ('','');
- # $GroupBy (primary sorting)
- if (!$GroupBy) {
- $GroupBy = 'month';
- } else {
- ($GroupBy, $GroupSort) = SQLParseOrder($GroupBy);
- if ($GroupBy =~ /group/i) {
- $GroupBy = 'newsgroup';
- } else {
- $GroupBy = 'month';
- }
- }
- my $Secondary = ($GroupBy eq 'month') ? 'newsgroup' : 'month';
- # $OrderBy (secondary sorting)
- if (!$OrderBy) {
- $OrderBy = $Secondary;
- } else {
- ($OrderBy, $OrderSort) = SQLParseOrder($OrderBy);
- if ($OrderBy =~ /posting/i) {
- $OrderBy = "postings $OrderSort, $Secondary";
- } else {
- $OrderBy = "$Secondary $OrderSort";
- }
- }
- return ($GroupBy,&SQLBuildClause('order',"$GroupBy $GroupSort",$OrderBy));
-};
-
-################################################################################
-sub SQLParseOrder {
-################################################################################
-### parse $OptGroupBy or $OptOrderBy option of the form param[-desc], e.g.
-### 'month', 'month-desc', 'newsgroups-desc', but also just 'desc'
-### IN : $OrderOption: order option (see above)
-### OUT: parameter to sort by,
-### sort order ('DESC' or nothing, meaning 'ASC')
- my ($OrderOption) = @_;
- my $SortOrder = '';
- if ($OrderOption =~ s/-?desc$//i) {
- $SortOrder = 'DESC';
- } else {
- $OrderOption =~ s/-?asc$//i
- }
- return ($OrderOption,$SortOrder);
-};
-
-################################################################################
-sub SQLGroupList {
-################################################################################
-### explode list of newsgroups separated by : (with wildcards)
-### to a SQL 'WHERE' expression
-### IN : $Newsgroups: list of newsgroups (group.one.*:group.two:group.three.*)
-### OUT: SQL code to become part of a 'WHERE' clause,
-### list of newsgroups for SQL bindings
- my ($Newsgroups) = @_;
- # substitute '*' wildcard with SQL wildcard character '%'
- $Newsgroups =~ s/\*/%/g;
- return (undef,undef) if !CheckValidNewsgroups($Newsgroups);
- # just one newsgroup?
- return (SQLGroupWildcard($Newsgroups),$Newsgroups) if $Newsgroups !~ /:/;
- my ($SQL,@WildcardGroups,@NoWildcardGroups);
- # list of newsgroups separated by ':'
- my @GroupList = split /:/, $Newsgroups;
- foreach (@GroupList) {
- if ($_ !~ /%/) {
- # add to list of newsgroup names WITHOUT wildcard
- push (@NoWildcardGroups,$_);
- } else {
- # add to list of newsgroup names WITH wildcard
- push (@WildcardGroups,$_);
- # add wildcard to SQL clause
- # 'OR' if SQL clause is not empty
- $SQL .= ' OR ' if $SQL;
- $SQL .= 'newsgroup LIKE ?'
- }
- };
- if (scalar(@NoWildcardGroups)) {
- # add 'OR' if SQL clause is not empty
- $SQL .= ' OR ' if $SQL;
- if (scalar(@NoWildcardGroups) < 2) {
- # special case: just one newsgroup without wildcard
- $SQL .= 'newsgroup = ?';
- } else {
- # create list of newsgroups to include: 'newsgroup IN (...)'
- $SQL .= 'newsgroup IN (';
- my $SQLin;
- foreach (@NoWildcardGroups) {
- $SQLin .= ',' if $SQLin;
- $SQLin .= '?';
- }
- # add list to SQL clause
- $SQL .= $SQLin .= ')';
- }
- }
- # add brackets '()' to SQL clause as needed (more than one wildcard group)
- if (scalar(@WildcardGroups)) {
- $SQL = '(' . $SQL .')';
- }
- # rebuild @GroupList in (now) correct order
- @GroupList = (@WildcardGroups,@NoWildcardGroups);
- return ($SQL,@GroupList);
-};
-
-################################################################################
-sub SQLGroupWildcard {
-################################################################################
-### build a valid SQL 'WHERE' expression with or without wildcards
-### IN : $Newsgroup: newsgroup expression, probably with wildcard
-### (group.name or group.name.%)
-### OUT: SQL code to become part of a 'WHERE' clause
- my ($Newsgroup) = @_;
- if ($Newsgroup !~ /%/) {
- return 'newsgroup = ?';
- } else {
- return 'newsgroup LIKE ?';
- }
-};
-
-################################################################################
-sub SQLSetBounds {
-################################################################################
-### set upper and/or lower boundary (number of postings)
-### IN : $Type: 'level', 'average', 'sum' or 'default'
-### $LowBound,$UppBound: lower/upper boundary, respectively
-### OUT: SQL code to become part of a WHERE or HAVING clause
- my ($Type,$LowBound,$UppBound) = @_;
- ($LowBound,$UppBound) = SQLCheckNumber($LowBound,$UppBound);
- if($LowBound and $UppBound and $LowBound > $UppBound) {
- &Bleat(1,"Lower boundary $LowBound is larger than Upper boundary ".
- "$UppBound, exchanging boundaries.");
- ($LowBound,$UppBound) = ($UppBound,$LowBound);
- }
- # default to 'default'
- my $WhereHavingFunction = 'postings';
- # set $LowBound to SQL statement:
- # 'WHERE postings >=', 'HAVING MIN(postings) >=' or 'HAVING AVG(postings) >='
- if ($Type eq 'level') {
- $WhereHavingFunction = 'MIN(postings)'
- } elsif ($Type eq 'average') {
- $WhereHavingFunction = 'AVG(postings)'
- } elsif ($Type eq 'sum') {
- $WhereHavingFunction = 'SUM(postings)'
- }
- $LowBound = sprintf('%s >= '.$LowBound,$WhereHavingFunction) if ($LowBound);
- # set $LowBound to SQL statement:
- # 'WHERE postings <=', 'HAVING MAX(postings) <=' or 'HAVING AVG(postings) <='
- if ($Type eq 'level') {
- $WhereHavingFunction = 'MAX(postings)'
- } elsif ($Type eq 'average') {
- $WhereHavingFunction = 'AVG(postings)'
- } elsif ($Type eq 'sum') {
- $WhereHavingFunction = 'SUM(postings)'
- }
- $UppBound = sprintf('%s <= '.$UppBound,$WhereHavingFunction) if ($UppBound);
- return ($LowBound,$UppBound);
-};
-
-################################################################################
-sub SQLCheckNumber {
-################################################################################
-### check if input is a valid positive integer; otherwise, make it one
-### IN : @Numbers: array of parameters
-### OUT: @Numbers: a valid positive integer
- my (@Numbers) = @_;
- foreach my $Number (@Numbers) {
- if ($Number and $Number < 0) {
- &Bleat(1,"Boundary $Number is < 0, set to ".-$Number);
- $Number = -$Number;
- }
- $Number = '' if ($Number and $Number !~ /^\d+$/);
- }
- return @Numbers;
-};
-
-################################################################################
-sub SQLBuildClause {
-################################################################################
-### build a valid SQL WHERE, GROUP BY, ORDER BY or HAVING clause
-### from multiple expressions which *may* be empty
-### IN : $Type: 'where', 'having', 'group' or 'order'
-### @Expressions: array of expressions
-### OUT: $SQLClause: a SQL clause
- my ($Type,@Expressions) = @_;
- my ($SQLClause,$Separator,$Statement);
- # set separator ('AND' or ',')
- if ($Type eq 'where' or $Type eq 'having') {
- $Separator = 'AND';
- } else {
- $Separator = ',';
- }
- # set statement
- if ($Type eq 'where') {
- $Statement = 'WHERE';
- } elsif ($Type eq 'order') {
- $Statement = 'ORDER BY';
- } elsif ($Type eq 'having') {
- $Statement = 'HAVING';
- } else {
- $Statement = 'GROUP BY';
- }
- # build query from expressions with separators
- foreach my $Expression (@Expressions) {
- if ($Expression) {
- $SQLClause .= " $Separator " if ($SQLClause);
- $SQLClause .= $Expression;
- }
- }
- # add statement in front if not already present
- $SQLClause = " $Statement " . $SQLClause
- if ($SQLClause and $SQLClause !~ /$Statement/);
- return $SQLClause;
-};
-
-#####--------------------------- Verifications ----------------------------#####
-
-################################################################################
-sub CheckValidNewsgroups {
-################################################################################
-### syntax check of newgroup list
-### IN : $Newsgroups: list of newsgroups (group.one.*:group.two:group.three.*)
-### OUT: boolean
- my ($Newsgroups) = @_;
- my $InvalidCharRegExp = ',; ';
- return ($Newsgroups =~ /[$InvalidCharRegExp]/) ? 0 : 1;
-};
-
-
-#####------------------------------- done ---------------------------------#####
-1;
-
-
projects / usenet / newsstats.git / blobdiff