// Copyright 2021-2024 The Connect Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
const contentTypeMatcherCacheSize = 1024;
/**
 * Create a function that returns true if the given mime type is supported.
 * A mime type is supported when one of the regular expressions match.
 *
 * @private Internal code, does not follow semantic versioning.
 */
function contentTypeMatcher(...supported) {
    const cache = new Map();
    const source = supported.reduce((previousValue, currentValue) => previousValue.concat("supported" in currentValue ? currentValue.supported : currentValue), []);
    function match(contentType) {
        if (contentType === null || contentType.length == 0) {
            return false;
        }
        const cached = cache.get(contentType);
        if (cached !== undefined) {
            return cached;
        }
        const ok = source.some((re) => re.test(contentType));
        if (cache.size < contentTypeMatcherCacheSize) {
            cache.set(contentType, ok);
        }
        return ok;
    }
    match.supported = source;
    return match;
}

export { contentTypeMatcher };
