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function parseFieldValues(output, searchField, field, values)
{
for (let value of values)
{
if (searchField.filters && searchField.filters.length > 0)
{
let filter = searchField.filters[0];
if (value.match(/^[a-z0-9]+:/))
{
let index = value.indexOf(':');
filter = value.substr(0, index);
if (searchField.filters.indexOf(filter) === -1)
{
filter = searchField.filters[0];
}
else
{
value = value.substr(index + 1);
}
}
if (filter !== 'regex')
{
value = value.split('|');
}
else
{
value = [value];
}
if (searchField.enum)
{
value = value.filter((v) => v.length > 0 && searchField.enum.indexOf(v) !== -1);
}
output.filter.push({
field: searchField.searchField || field,
filter,
value
});
}
}
}
function getDefaultOutput(searchMetadata)
{
return {
offset: 0,
limit: searchMetadata && searchMetadata.limit && searchMetadata.limit.default ? searchMetadata.limit.default : 20,
filter: [],
sort: false,
order: 'asc',
extra: [],
returnFacets: false
};
}
/**
* Validate and parse Request.query against what is acceptable from a SearchMetadata specification
*
* @param {SearchMetadata} searchMetadata
* @param {Query} query
* @return {ParsedQuery} will validated and parsed query filters
*/
function parse(searchMetadata, query)
{
let output = getDefaultOutput(searchMetadata);
// process query fields
Object.keys(query)
.sort()
.forEach((field) =>
{
// filters
if (searchMetadata.fields)
{
let searchField = searchMetadata.fields && searchMetadata.fields[field];
if (searchField)
{
let values = query[field];
if (!Array.isArray(values))
{
values = [values];
}
parseFieldValues(output, searchField, field, values);
}
}
// paging
if (field === 'offset')
{
console.log();
output.offset = Math.max(0, parseInt(query.offset));
}
else if (field === 'limit' && searchMetadata.limit)
{
output.limit = Math.max(searchMetadata.limit.minimum, Math.min(searchMetadata.limit.maximum, parseInt(query.limit)));
}
// sorting
else if (field === 'sort')
{
if (searchMetadata.sort && searchMetadata.sort.indexOf(query.sort) !== -1)
{
output.sort = query.sort;
}
}
else if (field === 'order')
{
output.order = query.order.substr(0, 1) !== 'd' ? 'asc' : 'dsc';
}
// facets and extra columns
else if (field === 'extra')
{
output.extra = query.extra.split(/\|/g)
.filter((x) => x);
}
else if (field === 'facets' && searchMetadata.facets)
{
output.returnFacets = true;
}
});
return output;
}
module.exports = parse;
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