@spartacus/core
Version:
Spartacus - the core framework
112 lines • 12.3 kB
JavaScript
import { deepMerge, isObject } from '../../config/utils/deep-merge';
/**
* Merge occ fields parameters
*
* @param fields Fields definition as string or object
*/
export function mergeFields(fields) {
const parsedFields = fields.map((f) => typeof f === 'string' ? parseFields(f) : f);
const mergedFields = optimizeFields(deepMerge({}, ...parsedFields));
return stringifyFields(mergedFields);
}
/**
* Optimize fields definition by removing not needed groups
*
* @param fields
*/
export function optimizeFields(fields = {}) {
const keys = Object.keys(fields);
if (keys.includes('FULL')) {
delete fields['DEFAULT'];
delete fields['BASIC'];
}
else if (keys.includes('DEFAULT')) {
delete fields['BASIC'];
}
Object.keys(fields).forEach((key) => {
fields[key] = optimizeFields(fields[key]);
});
return fields;
}
/**
* Parse string field definition to an AST object
*
* @param fields Fields string definition
* @param startIndex Used for recurrence
*/
export function parseFields(fields, startIndex = 0) {
const parsedFields = {};
let i = startIndex;
while (i < fields.length) {
if (fields[i] === ',') {
if (i > startIndex) {
parsedFields[fields.substr(startIndex, i - startIndex)] = {};
}
startIndex = i + 1;
}
else if (fields[i] === '(') {
const subFields = parseFields(fields, i + 1);
if (Array.isArray(subFields)) {
parsedFields[fields.substr(startIndex, i - startIndex)] = subFields[0];
startIndex = subFields[1];
i = startIndex - 1;
}
else {
return parsedFields;
}
}
else if (fields[i] === ')') {
if (i > startIndex) {
parsedFields[fields.substr(startIndex, i - startIndex)] = {};
}
return [parsedFields, i + 1];
}
i++;
}
if (startIndex < fields.length) {
parsedFields[fields.substr(startIndex, i - startIndex)] = {};
}
return parsedFields;
}
/**
* Convert AST object fields definition to string representation
*
* @param fields
*/
export function stringifyFields(fields) {
return Object.keys(fields)
.map((key) => {
const subFields = stringifyFields(fields[key]);
return subFields ? `${key}(${subFields})` : key;
})
.join(',');
}
/**
* Extract part of the object described by fields definition
*
* @param data
* @param fields
*/
export function extractFields(data, fields) {
const parsedFields = typeof fields === 'string' ? parseFields(fields) : fields;
return getObjectPart(data, parsedFields);
}
function getObjectPart(data, fields) {
if (!isObject(data)) {
return data;
}
const keys = Object.keys(fields);
if (keys.length === 0 ||
// we should not extract parts of the object with ambiguous fields definitions
keys.find((el) => el === 'BASIC' || el === 'DEFAULT' || el === 'FULL')) {
return data;
}
const result = {};
keys.forEach((key) => {
if (data.hasOwnProperty(key)) {
result[key] = getObjectPart(data[key], fields[key]);
}
});
return result;
}
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parseFields(f) : f\n  );\n  const mergedFields = optimizeFields(deepMerge({}, ...parsedFields));\n  return stringifyFields(mergedFields);\n}\n\n/**\n * Optimize fields definition by removing not needed groups\n *\n * @param fields\n */\nexport function optimizeFields(fields: object = {}): object {\n  const keys = Object.keys(fields);\n  if (keys.includes('FULL')) {\n    delete fields['DEFAULT'];\n    delete fields['BASIC'];\n  } else if (keys.includes('DEFAULT')) {\n    delete fields['BASIC'];\n  }\n  Object.keys(fields).forEach((key) => {\n    fields[key] = optimizeFields(fields[key]);\n  });\n  return fields;\n}\n\n/**\n * Parse string field definition to an AST object\n *\n * @param fields Fields string definition\n * @param startIndex Used for recurrence\n */\nexport function parseFields(\n  fields: string,\n  startIndex = 0\n): [object, number] | object {\n  const parsedFields = {};\n\n  let i = startIndex;\n  while (i < fields.length) {\n    if (fields[i] === ',') {\n      if (i > startIndex) {\n        parsedFields[fields.substr(startIndex, i - startIndex)] = {};\n      }\n      startIndex = i + 1;\n    } else if (fields[i] === '(') {\n      const subFields = parseFields(fields, i + 1);\n      if (Array.isArray(subFields)) {\n        parsedFields[fields.substr(startIndex, i - startIndex)] = subFields[0];\n        startIndex = subFields[1];\n        i = startIndex - 1;\n      } else {\n        return parsedFields;\n      }\n    } else if (fields[i] === ')') {\n      if (i > startIndex) {\n        parsedFields[fields.substr(startIndex, i - startIndex)] = {};\n      }\n      return [parsedFields, i + 1];\n    }\n    i++;\n  }\n\n  if (startIndex < fields.length) {\n    parsedFields[fields.substr(startIndex, i - startIndex)] = {};\n  }\n\n  return parsedFields;\n}\n\n/**\n * Convert AST object fields definition to string representation\n *\n * @param fields\n */\nexport function stringifyFields(fields: object): string {\n  return Object.keys(fields)\n    .map((key) => {\n      const subFields = stringifyFields(fields[key]);\n      return subFields ? `${key}(${subFields})` : key;\n    })\n    .join(',');\n}\n\n/**\n * Extract part of the object described by fields definition\n *\n * @param data\n * @param fields\n */\nexport function extractFields<T>(data: T, fields: string | object): T {\n  const parsedFields =\n    typeof fields === 'string' ? parseFields(fields) : fields;\n  return getObjectPart<T>(data, parsedFields);\n}\n\nfunction getObjectPart<T>(data: T, fields: object): T {\n  if (!isObject(data)) {\n    return data;\n  }\n\n  const keys = Object.keys(fields);\n\n  if (\n    keys.length === 0 ||\n    // we should not extract parts of the object with ambiguous fields definitions\n    keys.find((el) => el === 'BASIC' || el === 'DEFAULT' || el === 'FULL')\n  ) {\n    return data;\n  }\n\n  const result = {} as T;\n\n  keys.forEach((key) => {\n    if (data.hasOwnProperty(key)) {\n      result[key] = getObjectPart(data[key], fields[key]);\n    }\n  });\n\n  return result;\n}\n"]}