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app_vue/node_modules/axios/lib/helpers/toFormData.js

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+'use strict';
+
+import utils from '../utils.js';
+import AxiosError from '../core/AxiosError.js';
+// temporary hotfix to avoid circular references until AxiosURLSearchParams is refactored
+import PlatformFormData from '../platform/node/classes/FormData.js';
+
+/**
+ * Determines if the given thing is a array or js object.
+ *
+ * @param {string} thing - The object or array to be visited.
+ *
+ * @returns {boolean}
+ */
+function isVisitable(thing) {
+  return utils.isPlainObject(thing) || utils.isArray(thing);
+}
+
+/**
+ * It removes the brackets from the end of a string
+ *
+ * @param {string} key - The key of the parameter.
+ *
+ * @returns {string} the key without the brackets.
+ */
+function removeBrackets(key) {
+  return utils.endsWith(key, '[]') ? key.slice(0, -2) : key;
+}
+
+/**
+ * It takes a path, a key, and a boolean, and returns a string
+ *
+ * @param {string} path - The path to the current key.
+ * @param {string} key - The key of the current object being iterated over.
+ * @param {string} dots - If true, the key will be rendered with dots instead of brackets.
+ *
+ * @returns {string} The path to the current key.
+ */
+function renderKey(path, key, dots) {
+  if (!path) return key;
+  return path.concat(key).map(function each(token, i) {
+    // eslint-disable-next-line no-param-reassign
+    token = removeBrackets(token);
+    return !dots && i ? '[' + token + ']' : token;
+  }).join(dots ? '.' : '');
+}
+
+/**
+ * If the array is an array and none of its elements are visitable, then it's a flat array.
+ *
+ * @param {Array<any>} arr - The array to check
+ *
+ * @returns {boolean}
+ */
+function isFlatArray(arr) {
+  return utils.isArray(arr) && !arr.some(isVisitable);
+}
+
+const predicates = utils.toFlatObject(utils, {}, null, function filter(prop) {
+  return /^is[A-Z]/.test(prop);
+});
+
+/**
+ * Convert a data object to FormData
+ *
+ * @param {Object} obj
+ * @param {?Object} [formData]
+ * @param {?Object} [options]
+ * @param {Function} [options.visitor]
+ * @param {Boolean} [options.metaTokens = true]
+ * @param {Boolean} [options.dots = false]
+ * @param {?Boolean} [options.indexes = false]
+ *
+ * @returns {Object}
+ **/
+
+/**
+ * It converts an object into a FormData object
+ *
+ * @param {Object<any, any>} obj - The object to convert to form data.
+ * @param {string} formData - The FormData object to append to.
+ * @param {Object<string, any>} options
+ *
+ * @returns
+ */
+function toFormData(obj, formData, options) {
+  if (!utils.isObject(obj)) {
+    throw new TypeError('target must be an object');
+  }
+
+  // eslint-disable-next-line no-param-reassign
+  formData = formData || new (PlatformFormData || FormData)();
+
+  // eslint-disable-next-line no-param-reassign
+  options = utils.toFlatObject(options, {
+    metaTokens: true,
+    dots: false,
+    indexes: false
+  }, false, function defined(option, source) {
+    // eslint-disable-next-line no-eq-null,eqeqeq
+    return !utils.isUndefined(source[option]);
+  });
+
+  const metaTokens = options.metaTokens;
+  // eslint-disable-next-line no-use-before-define
+  const visitor = options.visitor || defaultVisitor;
+  const dots = options.dots;
+  const indexes = options.indexes;
+  const _Blob = options.Blob || typeof Blob !== 'undefined' && Blob;
+  const useBlob = _Blob && utils.isSpecCompliantForm(formData);
+
+  if (!utils.isFunction(visitor)) {
+    throw new TypeError('visitor must be a function');
+  }
+
+  function convertValue(value) {
+    if (value === null) return '';
+
+    if (utils.isDate(value)) {
+      return value.toISOString();
+    }
+
+    if (utils.isBoolean(value)) {
+      return value.toString();
+    }
+
+    if (!useBlob && utils.isBlob(value)) {
+      throw new AxiosError('Blob is not supported. Use a Buffer instead.');
+    }
+
+    if (utils.isArrayBuffer(value) || utils.isTypedArray(value)) {
+      return useBlob && typeof Blob === 'function' ? new Blob([value]) : Buffer.from(value);
+    }
+
+    return value;
+  }
+
+  /**
+   * Default visitor.
+   *
+   * @param {*} value
+   * @param {String|Number} key
+   * @param {Array<String|Number>} path
+   * @this {FormData}
+   *
+   * @returns {boolean} return true to visit the each prop of the value recursively
+   */
+  function defaultVisitor(value, key, path) {
+    let arr = value;
+
+    if (value && !path && typeof value === 'object') {
+      if (utils.endsWith(key, '{}')) {
+        // eslint-disable-next-line no-param-reassign
+        key = metaTokens ? key : key.slice(0, -2);
+        // eslint-disable-next-line no-param-reassign
+        value = JSON.stringify(value);
+      } else if (
+        (utils.isArray(value) && isFlatArray(value)) ||
+        ((utils.isFileList(value) || utils.endsWith(key, '[]')) && (arr = utils.toArray(value))
+        )) {
+        // eslint-disable-next-line no-param-reassign
+        key = removeBrackets(key);
+
+        arr.forEach(function each(el, index) {
+          !(utils.isUndefined(el) || el === null) && formData.append(
+            // eslint-disable-next-line no-nested-ternary
+            indexes === true ? renderKey([key], index, dots) : (indexes === null ? key : key + '[]'),
+            convertValue(el)
+          );
+        });
+        return false;
+      }
+    }
+
+    if (isVisitable(value)) {
+      return true;
+    }
+
+    formData.append(renderKey(path, key, dots), convertValue(value));
+
+    return false;
+  }
+
+  const stack = [];
+
+  const exposedHelpers = Object.assign(predicates, {
+    defaultVisitor,
+    convertValue,
+    isVisitable
+  });
+
+  function build(value, path) {
+    if (utils.isUndefined(value)) return;
+
+    if (stack.indexOf(value) !== -1) {
+      throw Error('Circular reference detected in ' + path.join('.'));
+    }
+
+    stack.push(value);
+
+    utils.forEach(value, function each(el, key) {
+      const result = !(utils.isUndefined(el) || el === null) && visitor.call(
+        formData, el, utils.isString(key) ? key.trim() : key, path, exposedHelpers
+      );
+
+      if (result === true) {
+        build(el, path ? path.concat(key) : [key]);
+      }
+    });
+
+    stack.pop();
+  }
+
+  if (!utils.isObject(obj)) {
+    throw new TypeError('data must be an object');
+  }
+
+  build(obj);
+
+  return formData;
+}
+
+export default toFormData;