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var _ = require('lodash'),
check = require('check-types'),
type_mapping = require('../helper/type_mapping');
var ID_DELIM = ':';
// validate inputs, convert types and apply defaults id generally looks like
// 'geonames:venue:4163334' (source:layer:id) so, all three are required
var lengthError = 'invalid param \'ids\': length must be >0';
var formatError = function(input) {
return 'id `' + input + ' is invalid: must be of the format source:layer:id for ex: \'geonames:venue:4163334\'';
};
var targetError = function(target, target_list) {
return target + ' is invalid. It must be one of these values - [' + target_list.join(', ') + ']';
};
function sanitizeId(rawId, messages) {
var parts = rawId.split(ID_DELIM);
if ( parts.length < 3 ) {
messages.errors.push( formatError(rawId) );
return;
}
var source = parts[0];
var layer = parts[1];
var id = parts.slice(2).join(ID_DELIM);
// check if any parts of the gid are empty
if (_.includes([source, layer, id], '')) {
messages.errors.push( formatError(rawId) );
return;
}
if (!_.includes(type_mapping.sources, source)) {
messages.errors.push( targetError(source, type_mapping.sources) );
return;
}
if (!_.includes(type_mapping.layers, layer)) {
messages.errors.push( targetError(layer, type_mapping.layers) );
return;
}
return {
source: source,
layer: layer,
id: id,
};
}
function sanitize( raw, clean ){
// error & warning messages
var messages = { errors: [], warnings: [] };
if (!check.nonEmptyString( raw.ids )) {
messages.errors.push( lengthError);
return messages;
}
// split string into array of values
var rawIds = raw.ids.split(',');
// deduplicate
rawIds = _.uniq(rawIds);
// ensure all elements are valid non-empty strings
if (!rawIds.every(check.nonEmptyString)) {
messages.errors.push( lengthError );
}
// cycle through raw ids and set those which are valid
var validIds = rawIds.map(function(rawId) {
return sanitizeId(rawId, messages);
});
if (validIds.every(check.object)) {
clean.ids = validIds;
}
return messages;
}
// export function
module.exports = sanitize;