@dnb/eufemia/extensions/forms/utils/json-pointer/json-pointer.js

DNB Eufemia Design System UI Library

import _pushInstanceProperty from "core-js-pure/stable/instance/push.js";
export function get(obj, pointer) {
  const refTokens = Array.isArray(pointer) ? pointer : parse(pointer);
  for (let i = 0; i < refTokens.length; ++i) {
    const tok = refTokens[i];
    if (!(typeof obj === 'object' && tok in obj)) {
      throw new Error('Invalid reference token: ' + tok);
    }
    obj = obj[tok];
  }
  return obj;
}
export function set(obj, pointer, value) {
  const refTokens = Array.isArray(pointer) ? pointer : parse(pointer);
  let nextTok = refTokens[0];
  if (refTokens.length === 0) {
    throw Error('Cannot set the root object');
  }
  for (let i = 0; i < refTokens.length - 1; ++i) {
    let tok = refTokens[i];
    if (typeof tok !== 'string' && typeof tok !== 'number') {
      tok = String(tok);
    }
    if (tok === '__proto__' || tok === 'constructor' || tok === 'prototype') {
      continue;
    }
    if (tok === '-' && Array.isArray(obj)) {
      tok = obj.length;
    }
    nextTok = refTokens[i + 1];
    if (!(tok in obj)) {
      if (nextTok.match(/^(\d+|-)$/)) {
        obj[tok] = [];
      } else {
        obj[tok] = {};
      }
    }
    if (Object.isFrozen(obj[tok])) {
      obj[tok] = {
        ...obj[tok]
      };
    }
    obj = obj[tok];
  }
  if (nextTok === '-' && Array.isArray(obj)) {
    nextTok = obj.length;
  }
  obj[nextTok] = value;
}
export function remove(obj, pointer) {
  const refTokens = Array.isArray(pointer) ? pointer : parse(pointer);
  const finalToken = refTokens[refTokens.length - 1];
  if (finalToken === undefined) {
    throw new Error('Invalid JSON pointer for remove: "' + pointer + '"');
  }
  const parent = get(obj, refTokens.slice(0, -1));
  if (Array.isArray(parent)) {
    const index = +finalToken;
    if (finalToken === '' && isNaN(index)) {
      throw new Error('Invalid array index: "' + finalToken + '"');
    }
    Array.prototype.splice.call(parent, index, 1);
  } else {
    delete parent[finalToken];
  }
}
export function dict(obj, descend = null) {
  const results = {};
  walk(obj, (value, pointer) => {
    results[pointer] = value;
  }, descend);
  return results;
}
export function walk(obj, iterator, descend = null) {
  const refTokens = [];
  descend = descend || (value => {
    const type = Object.prototype.toString.call(value);
    return type === '[object Object]' || type === '[object Array]';
  });
  next(obj, refTokens, iterator, descend);
}
function next(cur, refTokens, iterator, descend) {
  if (Array.isArray(cur)) {
    cur = cur.reduce((acc, cur, i) => {
      acc[i] = cur;
      return acc;
    }, {});
  }
  let res;
  for (const key in cur) {
    _pushInstanceProperty(refTokens).call(refTokens, String(key));
    if (descend(cur[key])) {
      res = next(cur[key], refTokens, iterator, descend);
    } else {
      res = iterator(cur[key], compile(refTokens));
    }
    if (res === false) {
      return false;
    }
    refTokens.pop();
  }
}
export function has(obj, pointer) {
  try {
    get(obj, pointer);
  } catch (e) {
    return false;
  }
  return true;
}
export function escape(str) {
  return str.toString().replace(/~/g, '~0').replace(/\//g, '~1');
}
export function unescape(str) {
  return str.replace(/~1/g, '/').replace(/~0/g, '~');
}
export function parse(pointer) {
  if (pointer === '') {
    return [];
  }
  if ((pointer === null || pointer === void 0 ? void 0 : pointer.charAt(0)) !== '/') {
    throw new Error('Invalid JSON pointer: ' + pointer);
  }
  return pointer.substring(1).split(/\//).map(unescape);
}
export function compile(refTokens) {
  if (refTokens.length === 0) {
    return '';
  }
  return '/' + refTokens.map(escape).join('/');
}
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