#!/bin/bash
# wordpress-multisite plugin
# 
# Author Jonas Palm
# Version 0.1
# Date 2016-02-07
# 
: <<=cut
=head1 NAME
Wordpress-Multisite Munin Plugin

A Munin plugin to monitor posts, comments and pingbacks from every multisite instance.
It uses multigraphs and also shows the combined number of posts, comments, pingbacks, instances and users.

Most database requests came from the wordpress-mu-plugin which was written by Andre Darafarin and Chris Bair

=head1 CONFIGURATION
The plugin need access to the wordpress database

=head2 Config file
Create the config file plugin-conf.d/wordpress with the following values:

=over 5
=item * [wordpress*]
=item * env.DB_USER <database user (mandatory)>
=item * env.DB_PASSWORD <database password (mandatory)>
=item * env.DB_NAME <database name (defaults to wordpress>
=item * env.DB_PREFIX <database prefix (defaults to wp_)>
=item * env.DB_HOST <database host (defaults to localhost)>

=back

=head1 VERSION                                                                                                                                                                                                                      

0.1 2016-02-07

=head1 AUTHOR

Jonas Palm <jonaspalm . posteo . de>

=cut

# Fill some variables
DB_USER=${DB_USER}
DB_PASSWORD=${DB_PASSWORD}
DB_NAME=${DB_NAME:-wordpress}
DB_PREFIX=${DB_PREFIX:-wp_}
DB_HOST=${DB_HOST:-localhost}
DB_PORT=${DB_PORT:-3306}

MYSQLOPTS="-h$DB_HOST -P $DB_PORT -p$DB_PASSWORD -u$DB_USER -D $DB_NAME --column-names=0 -s"

if [ "$1" = "config" ]; then
        echo "multigraph wordpress"
        echo "graph_title Wordpress Mulitsite"
        echo "graph_order instances users posts comments pingbacks"
        echo "graph_vlabel Wordpress"
        echo "graph_category Wordpress"
        echo "graph_info Some Statistics of Wordpress"
        echo "instances.label Instances"
        echo "users.label Users"
        echo "posts.label Posts"
        echo "comments.label Comments"
        echo "pingbacks.label Pingbacks"
else
        CNT=0
        for n in `mysql $MYSQLOPTS --execute="select blog_id from ${DB_PREFIX}blogs"`; do
                if [ "$n" == "1" ]; then
                        i=
                else
                        i=${n}_
                fi

                POSTS=`mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}${i}posts WHERE post_status = 'publish' AND post_password = '' AND post_type = 'post';"`
                (( POSTS_ += POSTS ))

                COMMENTS=`mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}${i}comments WHERE comment_approved = '1' AND comment_type = '';"`
                (( COMMENTS_ += COMMENTS ))

                PINGBACKS=`mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}${i}comments WHERE comment_approved = '1' AND comment_type = 'pingback';"`
                (( PINGBACKS_ += PINGBACKS ))

                (( CNT += 1 ))
        done

        # return values
        echo "multigraph wordpress"
        echo "posts.value $POSTS_"
        echo "comments.value $COMMENTS_"
        echo "pingbacks.value $PINGBACKS_"
        echo "instances.value $CNT"
        echo "users.value `mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}users ;"`"
fi

# single blogs
for n in `mysql $MYSQLOPTS --execute="select blog_id from ${DB_PREFIX}blogs"`; do
        if [ "${n}" == "1" ]; then
                i=
        else
                i=${n}_
        fi

        if [ "$n" -le "9" ]; then
                n=0${n}
        fi

        if [ "$1" = "config" ]; then
                echo "multigraph wordpress.site_${n}"
                echo "graph_title `mysql $MYSQLOPTS --execute=\"select option_value from ${DB_PREFIX}${i}options where option_name = 'siteurl';\"`"
                echo "graph_order posts comments pingbacks"
                echo "graph_vlabel Wordpress ID ${n}"
                echo "posts.label Posts"
                echo "comments.label Comments"
                echo "pingbacks.label Pingbacks"
        else
                POSTS=`mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}${i}posts WHERE post_status = 'publish' AND post_password = '' AND post_type = 'post';"`
                COMMENTS=`mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}${i}comments WHERE comment_approved = '1' AND comment_type = '';"`
                PINGBACKS=`mysql $MYSQLOPTS --execute="SELECT COUNT(*) FROM ${DB_PREFIX}${i}comments WHERE comment_approved = '1' AND comment_type = 'pingback';"`

                # return values
                echo "multigraph wordpress.site_${n}"
                echo "posts.value $POSTS"
                echo "comments.value $COMMENTS"
                echo "pingbacks.value $PINGBACKS"
        fi
done