Simplifying Puppet Manifest - puppet

Question

I want to provision multiple sets of things on a server using existing puppet modules the simplest example would be:
file { "/var/www/MYVARIABLEHERE":
ensure => "directory",
}
mysql::db { MYVARIABLEHERE:
user => MYVARIABLEHERE,
password => MYVARIABLEHERE,
host => 'localhost',
grant => ['all'],
}
Is there a way to abstract this out so that I can have say an array of pre defined options and then pass them into existing puppet modules so I don't end up with a manifest file that's thousands of lines long?
As per the answer below I have setup:
define mySites {
mysql::db { $name:
user => $name,
password => $name,
host => 'localhost',
grant => ['all'],
}
file { "/var/www/${name}.drupal.dev":
ensure => "directory",
}
}
I then call:
mySites {"site": $name => "test", }
and get the following error:
Could not parse for environment production: Syntax error at 'name'; expected '}'

Answer 1

You could use a define type to simplify as much :
define mydef( $usern, $passn) {
file { "/var/www/$usern":
ensure => "directory",
}
mysql::db { $usern :
user => $usern,
password => $passn,
host => "localhost",
grant => ['all'],
}
}
# You have to call the define type for each cases.
mydef{"u1": usern => "john", password => "pass", }
# It might be possible to provide multiple arrays to a define
# type if you use puppet's future parser