dianshang-qianduan/src/utils/index.js

import { parseTime } from "./ruoyi";
/**
 * 通用分页函数
 * @param {Array} data - 需要分页的数据源
 * @param {Number} page - 当前页码
 * @param {Number} pageSize - 每页显示的条目数
 * @returns {Object} 分页结果，包含当前页的数据，页码信息，及总页数
 */
export function paginate(data, page = 1, pageSize = 10) {
  // 计算总页数
  const totalItems = data.length;
  const totalPages = Math.ceil(totalItems / pageSize);
  // 确保页码在有效范围内
  const currentPage = Math.min(Math.max(page, 1), totalPages);
  // 计算当前页的数据起始索引和结束索引
  const startIndex = (currentPage - 1) * pageSize;
  const endIndex = Math.min(startIndex + pageSize, totalItems);

  // 获取当前页的数据片段
  const pageData = data.slice(startIndex, endIndex);
  return {
    currentPage,
    pageSize,
    totalItems,
    totalPages,
    data: pageData,
  };
}
export function getAssetsFile(url) {
  return new URL(`../assets/images/${url}`, import.meta.url).href;
}
/**
 * 表格时间格式化
 */
function isTimestamp(value) {
  // 判断是否为数字类型且是否为整数
  if (typeof value === "number" && Number.isInteger(value)) {
    // 判断时间戳是否为13位
    return value.toString().length === 13;
  }
  return false;
}
export function formatDate(cellValue) {
  // 判断是不是时间戳不是就返回
  let time;
  if (isTimestamp(cellValue)) {
    var date = new Date(cellValue);
    var year = date.getFullYear();
    var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
    var day = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
    var hours = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
    var minutes = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
    var seconds = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
    time = year + "-" + month + "-" + day + " " + hours + ":" + minutes + ":" + seconds;
  } else {
    time = cellValue;
  }
  return time;
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (("" + time).length === 10) {
    time = parseInt(time) * 1000;
  } else {
    time = +time;
  }
  const d = new Date(time);
  const now = Date.now();

  const diff = (now - d) / 1000;

  if (diff < 30) {
    return "刚刚";
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + "分钟前";
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + "小时前";
  } else if (diff < 3600 * 24 * 2) {
    return "1天前";
  }
  if (option) {
    return parseTime(time, option);
  } else {
    return d.getMonth() + 1 + "月" + d.getDate() + "日" + d.getHours() + "时" + d.getMinutes() + "分";
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function getQueryObject(url) {
  url = url == null ? window.location.href : url;
  const search = url.substring(url.lastIndexOf("?") + 1);
  const obj = {};
  const reg = /([^?&=]+)=([^?&=]*)/g;
  search.replace(reg, (rs, $1, $2) => {
    const name = decodeURIComponent($1);
    let val = decodeURIComponent($2);
    val = String(val);
    obj[name] = val;
    return rs;
  });
  return obj;
}

/**
 * @param {string} input value
 * @returns {number} output value
 */
export function byteLength(str) {
  // returns the byte length of an utf8 string
  let s = str.length;
  for (var i = str.length - 1; i >= 0; i--) {
    const code = str.charCodeAt(i);
    if (code > 0x7f && code <= 0x7ff) s++;
    else if (code > 0x7ff && code <= 0xffff) s += 2;
    if (code >= 0xdc00 && code <= 0xdfff) i--;
  }
  return s;
}

/**
 * @param {Array} actual
 * @returns {Array}
 */
export function cleanArray(actual) {
  const newArray = [];
  for (let i = 0; i < actual.length; i++) {
    if (actual[i]) {
      newArray.push(actual[i]);
    }
  }
  return newArray;
}

/**
 * @param {Object} json
 * @returns {Array}
 */
export function param(json) {
  if (!json) return "";
  return cleanArray(
    Object.keys(json).map((key) => {
      if (json[key] === undefined) return "";
      return encodeURIComponent(key) + "=" + encodeURIComponent(json[key]);
    })
  ).join("&");
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = decodeURIComponent(url.split("?")[1]).replace(/\+/g, " ");
  if (!search) {
    return {};
  }
  const obj = {};
  const searchArr = search.split("&");
  searchArr.forEach((v) => {
    const index = v.indexOf("=");
    if (index !== -1) {
      const name = v.substring(0, index);
      const val = v.substring(index + 1, v.length);
      obj[name] = val;
    }
  });
  return obj;
}

/**
 * @param {string} val
 * @returns {string}
 */
export function html2Text(val) {
  const div = document.createElement("div");
  div.innerHTML = val;
  return div.textContent || div.innerText;
}

/**
 * Merges two objects, giving the last one precedence
 * @param {Object} target
 * @param {(Object|Array)} source
 * @returns {Object}
 */
export function objectMerge(target, source) {
  if (typeof target !== "object") {
    target = {};
  }
  if (Array.isArray(source)) {
    return source.slice();
  }
  Object.keys(source).forEach((property) => {
    const sourceProperty = source[property];
    if (typeof sourceProperty === "object") {
      target[property] = objectMerge(target[property], sourceProperty);
    } else {
      target[property] = sourceProperty;
    }
  });
  return target;
}

/**
 * @param {HTMLElement} element
 * @param {string} className
 */
export function toggleClass(element, className) {
  if (!element || !className) {
    return;
  }
  let classString = element.className;
  const nameIndex = classString.indexOf(className);
  if (nameIndex === -1) {
    classString += "" + className;
  } else {
    classString = classString.substr(0, nameIndex) + classString.substr(nameIndex + className.length);
  }
  element.className = classString;
}

/**
 * @param {string} type
 * @returns {Date}
 */
export function getTime(type) {
  if (type === "start") {
    return new Date().getTime() - 3600 * 1000 * 24 * 90;
  } else {
    return new Date(new Date().toDateString());
  }
}

/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result;

  const later = function () {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp;

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last);
    } else {
      timeout = null;
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args);
        if (!timeout) context = args = null;
      }
    }
  };

  return function (...args) {
    context = this;
    timestamp = +new Date();
    const callNow = immediate && !timeout;
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait);
    if (callNow) {
      result = func.apply(context, args);
      context = args = null;
    }

    return result;
  };
}

/**
 * This is just a simple version of deep copy
 * Has a lot of edge cases bug
 * If you want to use a perfect deep copy, use lodash's _.cloneDeep
 * @param {Object} source
 * @returns {Object}
 */
export function deepClone(source) {
  if (!source && typeof source !== "object") {
    throw new Error("error arguments", "deepClone");
  }
  const targetObj = source.constructor === Array ? [] : {};
  Object.keys(source).forEach((keys) => {
    if (source[keys] && typeof source[keys] === "object") {
      targetObj[keys] = deepClone(source[keys]);
    } else {
      targetObj[keys] = source[keys];
    }
  });
  return targetObj;
}

/**
 * @param {Array} arr
 * @returns {Array}
 */
export function uniqueArr(arr) {
  return Array.from(new Set(arr));
}

/**
 * @returns {string}
 */
export function createUniqueString() {
  const timestamp = +new Date() + "";
  const randomNum = parseInt((1 + Math.random()) * 65536) + "";
  return (+(randomNum + timestamp)).toString(32);
}

/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass(ele, cls) {
  return !!ele.className.match(new RegExp("(\\s|^)" + cls + "(\\s|$)"));
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass(ele, cls) {
  if (!hasClass(ele, cls)) ele.className += " " + cls;
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass(ele, cls) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp("(\\s|^)" + cls + "(\\s|$)");
    ele.className = ele.className.replace(reg, " ");
  }
}

export function makeMap(str, expectsLowerCase) {
  const map = Object.create(null);
  const list = str.split(",");
  for (let i = 0; i < list.length; i++) {
    map[list[i]] = true;
  }
  return expectsLowerCase ? (val) => map[val.toLowerCase()] : (val) => map[val];
}

export const exportDefault = "export default ";

export const beautifierConf = {
  html: {
    indent_size: "2",
    indent_char: " ",
    max_preserve_newlines: "-1",
    preserve_newlines: false,
    keep_array_indentation: false,
    break_chained_methods: false,
    indent_scripts: "separate",
    brace_style: "end-expand",
    space_before_conditional: true,
    unescape_strings: false,
    jslint_happy: false,
    end_with_newline: true,
    wrap_line_length: "110",
    indent_inner_html: true,
    comma_first: false,
    e4x: true,
    indent_empty_lines: true,
  },
  js: {
    indent_size: "2",
    indent_char: " ",
    max_preserve_newlines: "-1",
    preserve_newlines: false,
    keep_array_indentation: false,
    break_chained_methods: false,
    indent_scripts: "normal",
    brace_style: "end-expand",
    space_before_conditional: true,
    unescape_strings: false,
    jslint_happy: true,
    end_with_newline: true,
    wrap_line_length: "110",
    indent_inner_html: true,
    comma_first: false,
    e4x: true,
    indent_empty_lines: true,
  },
};

// 首字母大小
export function titleCase(str) {
  return str.replace(/( |^)[a-z]/g, (L) => L.toUpperCase());
}

// 下划转驼峰
export function camelCase(str) {
  return str.replace(/_[a-z]/g, (str1) => str1.substr(-1).toUpperCase());
}

export function isNumberStr(str) {
  return /^[+-]?(0|([1-9]\d*))(\.\d+)?$/g.test(str);
}
//文件下载
export function downBlobFile(fileName, fileBlob) {
  const link = document.createElement("a");
  try {
    // let blob = new Blob([res.data],{type: 'application/vnd.ms-excel'});    //如果后台返回的不是blob对象类型，先定义成blob对象格式,type格式根据返回文件不同修改
    const blob = fileBlob;
    const _fileName = fileName; // 拆解获取文件名，如果后端没返回文件格式，则需要自己拼接文件后缀
    link.style.display = "none";
    // 兼容浏览器
    const url = window.URL || window.webkitURL || window.moxURL;
    link.href = url.createObjectURL(blob); // 如果没设置axios请求reponseType为‘blob’的话，则参数应为new Blob(文件流),否则报错
    link.download = _fileName; // 下载的文件名称
    link.click();
    window.URL.revokeObjectURL(url); //  #URL.revokeObjectURL()方法会释放一个通过URL.createObjectURL()创建的对象URL. 当你要已经用过了这个对象URL,然后要让浏览器知道这个URL已经不再需要指向对应的文件的时候,就需要调用这个方法.
  } catch (error) {
    console.error(error.message);
  }
}