@struktoai/mirage-core/dist/utils/slash.js

A Unified Virtual Filesystem For AI Agents

// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// 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.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
export function rstripSlash(s) {
    let end = s.length;
    while (end > 0 && s.charCodeAt(end - 1) === 47)
        end--;
    return s.slice(0, end);
}
export function lstripSlash(s) {
    let start = 0;
    while (start < s.length && s.charCodeAt(start) === 47)
        start++;
    return s.slice(start);
}
export function stripSlash(s) {
    let start = 0;
    let end = s.length;
    while (start < end && s.charCodeAt(start) === 47)
        start++;
    while (end > start && s.charCodeAt(end - 1) === 47)
        end--;
    return s.slice(start, end);
}
// The trailing-slash directory form prefix comparisons need, so '/a/'
// cannot match '/ab' ('foo/bar' -> '/foo/bar/', '' -> '/').
export function normDir(s) {
    const stripped = stripSlash(s);
    return stripped === '' ? '/' : '/' + stripped + '/';
}
/**
 * The longest mount prefix owning `path`, or null.
 *
 * The one longest-prefix rule dispatch resolves a path by, shared so a
 * registry, a runtime routing table and a link filter cannot drift: a
 * prefix owns its own root (with or without a trailing slash) and
 * everything at a path boundary below it, so '/a/' owns '/a' and '/a/b'
 * but never '/ab'. The winner is returned in its input spelling,
 * letting each caller keep its own convention.
 */
export function ownerPrefix(prefixes, path) {
    const target = normDir(path);
    let best = null;
    let bestLen = -1;
    for (const prefix of prefixes) {
        const p = normDir(prefix);
        if (target.startsWith(p) && p.length > bestLen) {
            best = prefix;
            bestLen = p.length;
        }
    }
    return best;
}
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