yudao-mall-uniapp-master/sheep/helper/utils.js

export function isArray(value) {
  if (typeof Array.isArray === 'function') {
    return Array.isArray(value);
  } else {
    return Object.prototype.toString.call(value) === '[object Array]';
  }
}

export function isObject(value) {
  return Object.prototype.toString.call(value) === '[object Object]';
}

export function isNumber(value) {
  return !isNaN(Number(value));
}

export function isFunction(value) {
  return typeof value == 'function';
}

export function isString(value) {
  return typeof value == 'string';
}

export function isEmpty(value) {
  if (value === '' || value === undefined || value === null){
    return true;
  }

  if (isArray(value)) {
    return value.length === 0;
  }

  if (isObject(value)) {
    return Object.keys(value).length === 0;
  }

  return false
}

export function isBoolean(value) {
  return typeof value === 'boolean';
}

export function last(data) {
  if (isArray(data) || isString(data)) {
    return data[data.length - 1];
  }
}

export function cloneDeep(obj) {
  const d = isArray(obj) ? [...obj] : {};

  if (isObject(obj)) {
    for (const key in obj) {
      if (obj[key]) {
        if (obj[key] && typeof obj[key] === 'object') {
          d[key] = cloneDeep(obj[key]);
        } else {
          d[key] = obj[key];
        }
      }
    }
  }

  return d;
}

export function clone(obj) {
  return Object.create(Object.getPrototypeOf(obj), Object.getOwnPropertyDescriptors(obj));
}

export function deepMerge(a, b) {
  let k;
  for (k in b) {
    a[k] = a[k] && a[k].toString() === '[object Object]' ? deepMerge(a[k], b[k]) : (a[k] = b[k]);
  }
  return a;
}

export function contains(parent, node) {
  while (node && (node = node.parentNode)) if (node === parent) return true;
  return false;
}

export function orderBy(list, key) {
  return list.sort((a, b) => a[key] - b[key]);
}

export function deepTree(list) {
  const newList = [];
  const map = {};

  list.forEach((e) => (map[e.id] = e));

  list.forEach((e) => {
    const parent = map[e.parentId];

    if (parent) {
      (parent.children || (parent.children = [])).push(e);
    } else {
      newList.push(e);
    }
  });

  const fn = (list) => {
    list.map((e) => {
      if (e.children instanceof Array) {
        e.children = orderBy(e.children, 'orderNum');

        fn(e.children);
      }
    });
  };

  fn(newList);

  return orderBy(newList, 'orderNum');
}

export function revDeepTree(list = []) {
  const d = [];
  let id = 0;

  const deep = (list, parentId) => {
    list.forEach((e) => {
      if (!e.id) {
        e.id = id++;
      }

      e.parentId = parentId;

      d.push(e);

      if (e.children && isArray(e.children)) {
        deep(e.children, e.id);
      }
    });
  };

  deep(list || [], null);

  return d;
}

export function basename(path) {
  let index = path.lastIndexOf('/');
  index = index > -1 ? index : path.lastIndexOf('\\');
  if (index < 0) {
    return path;
  }
  return path.substring(index + 1);
}

export function isWxBrowser() {
  const ua = navigator.userAgent.toLowerCase();
  if (ua.match(/MicroMessenger/i) == 'micromessenger') {
    return true;
  } else {
    return false;
  }
}

/**
 * @description 如果value小于min，取min；如果value大于max，取max
 * @param {number} min
 * @param {number} max
 * @param {number} value
 */
export function range(min = 0, max = 0, value = 0) {
  return Math.max(min, Math.min(max, Number(value)));
}