Function parseSingle

coderd/httpapi/queryparams.go:431–447

(parser *QueryParamParser, parse func(v string) (T, error), def T, queryParam string)

}

func parseSingle[T any](parser *QueryParamParser, parse func(v string) (T, error), def T, queryParam string) func(set []string) (T, error) {
	return func(set []string) (T, error) {
		if len(set) > 1 {
			// Set as a parser.Error rather than return an error.
			// Returned errors are errors from the passed in `parse` function, and
			// imply the query param value had attempted to be parsed.
			// By raising the error this way, we can also more easily control how it
			// is presented to the user. A returned error is wrapped with more text.
			parser.Errors = append(parser.Errors, codersdk.ValidationError{
				Field:  queryParam,
				Detail: fmt.Sprintf("Query param %q provided more than once, found %d times. Only provide 1 instance of this query param.", queryParam, len(set)),
			})
			return def, nil
		}
		return parse(set[0])
	}
}

func parseQueryParamSet[T any](parser *QueryParamParser, vals url.Values, parse func(set []string) (T, error), def T, queryParam string) (T, error) {
	parser.addParsed(queryParam)