immutable-json-patch/lib/esm/jsonPointer.js

Immutable JSON patch with support for reverting operations

/**
 * Parse a JSON Pointer
 */
export function parseJSONPointer(pointer) {
  const path = pointer.split('/');
  path.shift(); // remove the first empty entry

  return path.map(p => p.replace(/~1/g, '/').replace(/~0/g, '~'));
}

/**
 * Compile a JSON Pointer
 */
export function compileJSONPointer(path) {
  return path.map(compileJSONPointerProp).join('');
}

/**
 * Compile a single path property from a JSONPath
 */
export function compileJSONPointerProp(pathProp) {
  return `/${String(pathProp).replace(/~/g, '~0').replace(/\//g, '~1')}`;
}

/**
 * Append a path property to a JSONPointer
 */
export function appendToJSONPointer(pointer, pathProp) {
  return pointer + compileJSONPointerProp(pathProp);
}

/**
 * Test whether `pointer` starts with `searchPointer`
 */
export function startsWithJSONPointer(pointer, searchPointer) {
  return pointer.startsWith(searchPointer) && (pointer.length === searchPointer.length || pointer[searchPointer.length] === '/');
}
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