egg-orm-ts/lib/object.js

Simple orm with Typeorm, for egg plugin.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.convertListToTree = exports.getMapByKey = exports.getValuesByKey = exports.isEmptyArray = exports.isEmptyObject = exports.batch = exports.modifyValues = void 0;
const string_1 = require("./string");
/**
 * modifyValues
 * @param _obj 参数
 * @param _fn 参数
 */
function modifyValues(_obj, _fn) {
    return batch(_obj, (_acc, _cur) => {
        if (_cur[1]) {
            _acc[_cur[0]] = _fn(_cur[1]);
        }
    });
}
exports.modifyValues = modifyValues;
/**
 * batch
 * @param _obj 参数
 * @param _fn 参数
 */
function batch(_obj, _fn) {
    return Object.entries(_obj).reduce((_acc, _cur) => {
        _fn(_acc, _cur);
        return _acc;
    }, {});
}
exports.batch = batch;
/**
 * 判断空对象
 * - null, undefined 或者 {}
 * - 没有一个合法属性(allFlag: false/undefined) 或 有一个非法属性(allFlag: true)
 * @param obj 参数
 * @param allFlag 判断属性标志
 * @returns boolean
 */
function isEmptyObject(obj, allFlag) {
    if (!obj || Object.keys(obj).length === 0) {
        return true;
    }
    if (!allFlag) {
        // 没有一个合法属性
        return Object.keys(obj).findIndex(r => string_1.isValid(obj[r])) === -1;
    }
    // 有一个非法属性
    return Object.keys(obj).findIndex(r => !string_1.isValid(obj[r])) !== -1;
}
exports.isEmptyObject = isEmptyObject;
/**
 * 判断空数组
 * - null, undefined 或者 空数组,
 * - 数据元素全部为非法;
 * @param arr 数组对象
 * @returns boolean
 */
function isEmptyArray(arr) {
    if (!arr || arr.length === 0 || arr.every((el) => !string_1.isValid(el))) {
        return true;
    }
    return false;
}
exports.isEmptyArray = isEmptyArray;
/**
 * 对象数组 转 指定属性的值的数组
 * @param arrayList 对象数组 [{}]
 * @param key 对象属性
 * @returns array
 */
function getValuesByKey(arrayList, key) {
    if (!arrayList) {
        return [];
    }
    const values = [];
    for (let i = 0; i < arrayList.length; i++) {
        if (!!arrayList[i]) {
            values.push(arrayList[i][key]);
        }
    }
    return values;
}
exports.getValuesByKey = getValuesByKey;
/**
 * 对象数组 转 指定属性的值的 map
 * @param arrayList 对象数组 [{}]
 * @param key 对象属性
 * @returns object
 */
function getMapByKey(arrayList, key) {
    if (!arrayList) {
        return {};
    }
    const map = {};
    for (let i = 0; i < arrayList.length; i++) {
        if (!!arrayList[i]) {
            map[arrayList[i][key]] = arrayList[i];
        }
    }
    return map;
}
exports.getMapByKey = getMapByKey;
/**
 * 转换list[{parent_[attr], [attr]}] 为 树结构数据
 * @param dataList 边表节点数组
 * @param rootAttrValue 根节点（如果未指定则返回分类列表）
 * @param attr 属性值，默认 id
 * @returns any
 */
function convertListToTree(dataList, rootAttrValue, attr) {
    let parent = 'parentId';
    let child = 'id';
    if (!!attr) {
        parent = 'parent' + string_1.upperCamelize(attr);
        child = attr;
    }
    // 转换数据
    let rootData;
    // 按 parent_[attr] 分组
    const parentMap = {};
    dataList && dataList.forEach(r => {
        // 获取父节点
        if (r[child] === rootAttrValue) {
            rootData = r;
        }
        if (!parentMap[r[parent]]) {
            parentMap[r[parent]] = [];
        }
        parentMap[r[parent]].push(r);
    });
    // 处理关联关系（由于是引用，则只需要遍历一遍关联即可）
    for (const p in parentMap) {
        parentMap[p] && parentMap[p].forEach((r) => {
            r.children = parentMap[r[child]];
        });
    }
    // 以父节点为基础汇总数据
    const rootList = parentMap[rootAttrValue];
    if (!rootList) {
        return dataList;
    }
    // 没有父节点，则响应首层列表（parentAttr = rootAttr）
    if (!rootData) {
        return rootList;
    }
    // 匹配父节点，则响应父节点（含下层节点，children）
    rootData.children = rootList;
    return rootData;
}
exports.convertListToTree = convertListToTree;
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