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Item1918: adding delete, fixing untags statistics
git-svn-id: http://svn.foswiki.org/trunk/TagsPlugin@4656 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
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OliverKrueger
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OliverKrueger
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Aug 12, 2009
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| # This script Copyright (c) 2009 Oliver Krueger, (wiki-one.net) | ||
| # and distributed under the GPL (see below) | ||
| # | ||
| # This program is free software; you can redistribute it and/or | ||
| # modify it under the terms of the GNU General Public License | ||
| # as published by the Free Software Foundation; either version 2 | ||
| # of the License, or (at your option) any later version. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details, published at | ||
| # http://www.gnu.org/copyleft/gpl.html | ||
| # | ||
| # Author(s): Oliver Krueger | ||
|
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| package Foswiki::Plugins::TagsPlugin::Delete; | ||
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| use strict; | ||
| use warnings; | ||
| use Error qw(:try); | ||
|
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| =begin TML | ||
| ---++ rest( $session ) | ||
| This is the REST wrapper for delete. | ||
| Delete purges the given tag and all its instances from the database. | ||
| Takes the following url parameters: | ||
| tag : name of the tag | ||
| It checks the prerequisites and sets the following status codes: | ||
| 200 : Ok | ||
| 400 : url parameter(s) are missing | ||
| 403 : the user is not allowed to delete tags | ||
| Return: | ||
| In case of an error (!=200 ) just the status code incl. short description is returned. | ||
| Otherwise a 200 and the number of affected tags (usually 0 or 1) is returned. | ||
| TODO: | ||
| force http POST method | ||
| =cut | ||
|
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| sub rest { | ||
| my $session = shift; | ||
| my $query = Foswiki::Func::getCgiQuery(); | ||
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| my $tag_text = $query->param('tag') || ''; | ||
| $tag_text = Foswiki::Sandbox::untaintUnchecked($tag_text); | ||
|
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| # | ||
| # checking prerequisites | ||
| # | ||
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| # first check the existence of all necessary url parameters | ||
| # | ||
| if ( !$tag_text ) { | ||
| $session->{response}->status(400); | ||
| return "<h1>400 'tag' parameter missing</h1>"; | ||
| } | ||
|
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| # check if current user is allowed to do so | ||
| # | ||
| my $tagAdminGroup = $Foswiki::cfg{TagsPlugin}{TagAdminGroup} || "AdminGroup"; | ||
| if ( !Foswiki::Func::isGroupMember( $tagAdminGroup, Foswiki::Func::getWikiName()) ) { | ||
| $session->{response}->status(403); | ||
| return "<h1>403 Forbidden</h1>"; | ||
| } | ||
|
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| # | ||
| # actioning | ||
| # | ||
| $session->{response}->status(200); | ||
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| # returning the number of affected tags | ||
| return Foswiki::Plugins::TagsPlugin::Delete::do( $tag_text ); | ||
| } | ||
|
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| =begin TML | ||
| ---++ do( $tag_text ) | ||
| This does the delete including all (user) instances of the tag. | ||
| Takes the following parameters: | ||
| tag_text : name of the tag | ||
| This routine does not check any prerequisites and/or priviledges. It returns 0, if | ||
| the given tag_text was not found. | ||
| Return: | ||
| number of affected tags in the format "n+m" with n as the number of tags and m as the number of (user) tag instances. | ||
| =cut | ||
|
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| sub do { | ||
| my ( $tag_text ) = @_; | ||
| my $db = new Foswiki::Contrib::DbiContrib; | ||
| my $retval = ""; | ||
|
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| # determine tag_id for given tag_text and exit if its not there | ||
| # | ||
| my $tag_id; | ||
| my $statement = sprintf( 'SELECT %s from %s WHERE %s = ? AND %s = ?', | ||
| qw( item_id Items item_name item_type) ); | ||
| my $arrayRef = $db->dbSelect( $statement, $tag_text, 'tag' ); | ||
| if ( defined( $arrayRef->[0][0] ) ) { | ||
| $tag_id = $arrayRef->[0][0]; | ||
| } | ||
| else { return 0; } | ||
|
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| # now we are ready to actually delete | ||
| # | ||
| # delete tag instances first | ||
| $statement = | ||
| sprintf( 'DELETE from %s WHERE %s = ?', | ||
| qw( UserItemTag tag_id ) ); | ||
| my $affected_rows = $db->dbDelete( $statement, $tag_id ); | ||
| if ( $affected_rows eq "0E0" ) { $affected_rows=0; }; | ||
| $retval = "$affected_rows"; | ||
|
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| # then delete the tag itself | ||
| $statement = | ||
| sprintf( 'DELETE from %s WHERE %s = ?', | ||
| qw( Items item_id ) ); | ||
| $affected_rows = $db->dbDelete( $statement, $tag_id ); | ||
| if ( $affected_rows eq "0E0" ) { $affected_rows=0; }; | ||
| $retval = "$affected_rows+$retval"; | ||
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| # update statistics | ||
| # | ||
| # ...in UserTagStat | ||
| $statement = | ||
| sprintf( 'DELETE from %s WHERE %s = ?', | ||
| qw( UserTagStat tag_id ) ); | ||
| $affected_rows = $db->dbDelete( $statement, $tag_id ); | ||
| # ...in TagStat | ||
| $statement = | ||
| sprintf( 'DELETE from %s WHERE %s = ?', | ||
| qw( TagStat item_id ) ); | ||
| $affected_rows = $db->dbDelete( $statement, $tag_id ); | ||
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| # flushing data to dbms | ||
| # | ||
| $db->commit(); | ||
|
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| return $retval; | ||
| } | ||
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| 1; |
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