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var check = require('check-types');
var MIN_SIZE = 1,
MAX_SIZE = 40,
DEFAULT_SIZE = 10;
// validate inputs, convert types and apply defaults
function _setup( size_min, size_max, size_def ){
// allow caller to inject custom min/max/default values
if( !check.number( size_min ) ){ size_min = MIN_SIZE; }
if( !check.number( size_max ) ){ size_max = MAX_SIZE; }
if( !check.number( size_def ) ){ size_def = DEFAULT_SIZE; }
return {
sanitize: function _sanitize( raw, clean ){
// error & warning messages
var messages = { errors: [], warnings: [] };
// coercions
clean.size = parseInt( raw.size, 10 );
// invalid numeric input
if( isNaN( clean.size ) ){
clean.size = size_def;
}
// ensure size falls within defined range
else if( clean.size > size_max ){
// set the max size
messages.warnings.push('out-of-range integer \'size\', using MAX_SIZE');
clean.size = size_max;
}
else if( clean.size < size_min ){
// set the min size
messages.warnings.push('out-of-range integer \'size\', using MIN_SIZE');
clean.size = size_min;
}
return messages;
},
expected: function _expected() {
// add size as a valid parameter for joi
return [{ name: 'size' }];
}
};
}
// export function
module.exports = _setup;