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define_tag(
'gravatar',
-req='email',
-opt='rating',
-opt='default',
-opt='size', -type='integer',
-priority='replace',
-encodenone,
-description='Retrieves the Gravatar for the given email address.'
);
fail_if(
!valid_email(#email),
-1, 'Email address supplied is not valid.'
);
fail_if(
local_defined('rating') && (:'G','PG','R','X') !>> #rating,
-1, 'Rating must be one of G, PG, R, or X.'
);
fail_if(
local_defined('size') && (#size < 1 || #size > 80),
-1, 'Size must be between 1 and 80.'
);
fail_if(
local_defined('default') && !valid_url(#default),
-1, 'Default must be a complete, valid URL.'
);
local('hash') = encrypt_md5(#email);
local('url') = 'http://www.gravatar.com/avatar.php?gravatar_id=' + #hash;
local_defined('rating') ? #url += '&rating=' + #rating;
local_defined('size') ? #url += '&size=' + #size;
local_defined('default') ? #url += '&default=' + encode_stricturl(#default);
return(#url);
/define_tag;
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