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<!doctype html> <html lang="en"> <head> <title>Code coverage report for index.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="prettify.css" /> <link rel="stylesheet" href="base.css" /> <link rel="shortcut icon" type="image/x-icon" href="favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="index.html">All files</a> index.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 81.61% Statements 111/136 </div> <div class='fl pad1y space-right2'> 86.36% Branches 76/88 </div> <div class='fl pad1y space-right2'> 100% Functions 7/7 </div> <div class='fl pad1y space-right2'> 81.61% Lines 111/136 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. <template id="filterTemplate"> <div class="quiet"> Filter: <input type="search" id="fileSearch"> </div> </template> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a name='L20'></a><a href='#L20'>20</a> <a name='L21'></a><a href='#L21'>21</a> <a name='L22'></a><a 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                          54x 54x 54x 54x                                   36x 36x 8x 6x 6x 36x 20x 8x 8x 8x 20x     36x 5x 5x 36x 1x     36x       36x       36x 1x     1x 1x                                                                                                                                                                                               56x 56x 56x                                               107x   107x         107x 107x 107x 60x 60x 107x 14x 10x   8x 2x   4x 4x 4x   2x 8x 6x 6x 8x 2x 2x 4x 4x 19x 19x 19x                                                             23x 23x 23x 23x 23x     23x 30x 26x 26x 30x 4x 4x 4x 26x 26x 30x     23x 4x 9x 7x 7x 9x       7x 7x 9x 4x     23x 30x 4x 4x 30x       4x 4x 30x 23x 23x  </td><td class="text"><pre class="prettyprint lang-js">/** * 用于自定义键名转换的函数类型 * @param oldKey 原始键名 * @returns 转换后的新键名 */ export type TemplateNewKeyFn = (oldKey: string) => string;   /** * 默认模板选项接口 */ export interface DefaultTemplateOption { /** * 用于匹配所有键的通配符键名，默认为 '?' */ allTemplateKey?: string; }   /** * 表示一个普通对象的接口 */ export interface PlainObject { /** * 索引签名，允许任意字符串键和任意类型值 */ [key: string]: any; }   /** * 模板重命名类，用于处理对象键名的重命名和值的转换 */ export class TemplateRename { /** * 新的键名或键名转换函数 */ public key: string | TemplateNewKeyFn; /** * 值的模板定义 */ public def: any;   /** * 创建一个模板重命名实例 * @param key 新的键名或键名转换函数 * @param def 值的模板定义 */ constructor(key: string | TemplateNewKeyFn, def: any) { this.key = key; this.def = def; } }   /** * 判断值是否为基本类型或特定的内置对象类型 * * 以下类型被视为基本类型： * - null * - undefined * - boolean * - number * - string * - function * - bigint * - symbol * - Date 实例 * - Set 实例 * - Map 实例 * * @param val 需要判断的值 * @returns 如果是基本类型或特定的内置对象类型则返回 true，否则返回 false */ function isBaseType(val: any): boolean { return ( val == null || typeof val === 'boolean' || typeof val === 'number' || typeof val === 'string' || typeof val === 'function' || typeof val === 'bigint' || typeof val === 'symbol' || val instanceof Date || val instanceof Set || val instanceof Map ); }   /** * 判断值是否为普通对象（不包括数组和特定的内置对象类型） * * 以下条件必须同时满足： * - 不为 null * - typeof 结果为 'object' * - 不是数组 * - 不是 Date 实例 * - 不是 Set 实例 * - 不是 Map 实例 * * @param val 需要判断的值 * @returns 如果是普通对象则返回 true，否则返回 false */ function isObject(val: any): val is PlainObject { return val !== null && typeof val === 'object' && !Array.isArray(val) && !(val instanceof Date) && !(val instanceof Set) && !(val instanceof Map); }   /** * 将值转换为指定类型的实例 * * 支持以下类型的转换： * - boolean: 字符串 'false' 转为 false，其他值使用 Boolean() 转换 * - number: 尝试将字符串或数字转换为有效数字，失败则返回默认值 * - string: null/undefined 返回默认值，其他值使用 String() 转换 * - Date: 如果不是 Date 实例则返回默认值 * - Set: 如果不是 Set 实例则返回默认值 * - Map: 如果不是 Map 实例则返回默认值 * - symbol: 如果不是 symbol 则返回默认值 * * @param type 目标类型的示例值 * @param val 需要转换的值 * @returns 转换后的值 */ function convertToType(type: any, val: any) { if (typeof type === 'boolean') { if (typeof val === 'string' && val.toLowerCase() === 'false') return false; return Boolean(val); } if (typeof type === 'number') { if (typeof val === 'string' && val !== '') { const n = Number(val); if (Number.isFinite(n)) return n; } if (typeof val === 'number' && Number.isFinite(val)) return val; return type; } if (typeof type === 'string') { return val == null ? type : String(val); } if (type instanceof Date) { if (val instanceof Date) return val; return type; } if (type instanceof Set) { if (val instanceof Set) return val; return type; } if (type instanceof Map) { if (val instanceof Map) return val; return type; } if (typeof type === 'symbol') { if (typeof val === 'symbol') return val; return type; } return val; }   /** * 默认值模板函数，用于处理数据结构的默认值、类型转换和键名映射 * * 主要功能： * 1. 为 null/undefined 值提供默认值 * 2. 自动转换值类型以匹配模板类型 * 3. 支持数组元素的模板处理 * 4. 支持对象属性的模板处理和键名映射 * 5. 支持通配符键处理所有未指定的属性 * * @example 基本类型处理 * ```typescript * defaultTemplate(10, undefined) // 返回: 10 * defaultTemplate(10, '20') // 返回: 20 (类型转换) * defaultTemplate(false, 'true') // 返回: true (类型转换) * ``` * * @example 数组处理 * ```typescript * defaultTemplate([10], [null, '20', 30]) // 返回: [10, 20, 30] * defaultTemplate([{ min: 0 }], [{ val: -1 }, { val: 5 }]) * // 返回: [{ min: 0, val: -1 }, { min: 0, val: 5 }] * ``` * * @example 对象处理 * ```typescript * defaultTemplate( * { a: 10, b: false, '?': true }, * { a: '20', c: null } * ) // 返回: { a: 20, c: true } * * // 嵌套对象处理 * defaultTemplate( * { user: { name: '', age: 0 } }, * { user: { name: 'John' } } * ) // 返回: { user: { name: 'John', age: 0 } } * ``` * * @example 键名映射 * ```typescript * // 静态键名映射 * defaultTemplate( * { a: new TemplateRename('newA', 10) }, * { a: '20' } * ) // 返回: { newA: 20 } * * // 动态键名映射 * defaultTemplate( * { '?': new TemplateRename(key => `prefix_${key}`, true) }, * { foo: false, bar: null } * ) // 返回: { prefix_foo: false, prefix_bar: true } * ``` * * @example 复杂嵌套结构 * ```typescript * const template = { * users: [{ * id: new TemplateRename('userId', ''), * profile: { * name: '', * settings: { '?': false } * } * }] * }; * const data = { * users: [{ * id: 'u123', * profile: { * name: 'John', * settings: { notifications: null, darkMode: true } * } * }] * }; * // 返回: { * // users: [{ * // userId: 'u123', * // profile: { * // name: 'John', * // settings: { notifications: false, darkMode: true } * // } * // }] * // } * ``` * * @param def 模板定义，指定默认值和类型。可以是： * - 基本类型值：用作默认值和类型示例 * - 数组：第一个元素作为所有数组元素的模板 * - 对象：键值对定义属性的模板，'?' 键作为通配符模板 * - TemplateRename：定义键名映射规则 * - null/undefined：表示保持原值不变 * @param src 源数据，需要处理的原始数据 * @param opt 选项配置，可以自定义通配符键名 * @returns 处理后的数据 */ export default function defaultTemplate<T>(def: T, src: any, opt: DefaultTemplateOption = { allTemplateKey: '?' }): T { return internalTemplate(def, src, opt, undefined) as T; }   /** * 内部模板处理函数，处理模板定义和源数据的递归转换 * * 处理流程： * 1. 解包 TemplateRename： * - 递归处理嵌套的 TemplateRename * - 应用键名转换函数 * 2. 基础情况处理： * - null/undefined 模板：返回原值 * - 函数模板：直接调用 * 3. 类型处理： * - 基本类型：调用 convertToType 进行类型转换 * - 数组：递归处理每个元素 * - 对象：调用 handleObjectTemplate 处理 * * @param def 模板定义 * @param src 源数据 * @param opt 选项配置 * @param owner 当前处理的对象或数组，用于键名转换函数 * @returns 处理后的数据 * @internal */ function internalTemplate(def: any, src: any, opt: DefaultTemplateOption, owner: any): any { // 递归解包 TemplateRename while (def instanceof TemplateRename) { const key = typeof def.key === 'function' && owner ? def.key(owner) : def.key; def = def.def; owner = key; } if (def == null) return src; if (typeof def === 'function') return def(src, owner); if (isBaseType(def)) { return src != null && isBaseType(src) ? convertToType(def, src) : def; } if (Array.isArray(def)) { if (Array.isArray(src)) { if (def.length > 0) { // 判断模板元素是否为对象模板 if (isObject(def[0])) { return src.map(item => { // 以原对象为基础补全模板字段 if (isObject(item)) { return { ...item, ...handleObjectTemplate(def[0], item, opt, src) }; } return internalTemplate(def[0], item, opt, src); }); } else { return src.map(item => internalTemplate(def[0], item, opt, src)); } } return src; } return []; } if (isObject(def)) { return handleObjectTemplate(def, src, opt, owner); } return def; }   /** * 处理对象类型的模板转换 * * 处理流程： * 1. 处理源对象中存在的属性： * - 优先使用属性对应的模板 * - 如无对应模板，尝试使用通配符模板 * - 处理可能的键名重命名 * 2. 处理模板中存在但源对象中不存在的属性： * - 使用模板值作为默认值 * - 处理可能的键名重命名 * 3. 键名重命名处理： * - 解包嵌套的 TemplateRename * - 支持静态重命名和动态重命名函数 * * 注意事项： * - 通配符键 ('?') 只用于未显式定义模板的属性 * - 重命名后的键名不会再次应用模板 * - 源对象中的属性如果没有对应模板且无通配符模板会被忽略 * * @param def 对象类型的模板定义 * @param src 源数据 * @param opt 选项配置 * @param owner 当前处理的父对象 * @returns 处理后的对象 * @internal */ function handleObjectTemplate(def: PlainObject, src: any, opt: DefaultTemplateOption, owner: any): PlainObject { const allKey = opt.allTemplateKey || '?'; const result: PlainObject = {}; const defKeys = Object.keys(def); const srcObj = isObject(src) ? src : {};   // 处理模板中声明的字段 for (const key of defKeys) { if (key === allKey) continue; let tpl = def[key]; let newKey = key; while (tpl instanceof TemplateRename) { newKey = typeof tpl.key === 'function' ? tpl.key(key) : tpl.key; tpl = tpl.def; } const val = internalTemplate(tpl, srcObj[key], opt, srcObj); if (val !== undefined) result[newKey] = val; }   // 处理通配符模板，补全原对象中未被模板显式声明的字段 if (def[allKey] !== undefined) { for (const key of Object.keys(srcObj)) { if (def.hasOwnProperty(key)) continue; let tpl = def[allKey]; let newKey = key; while (tpl instanceof TemplateRename) { newKey = typeof tpl.key === 'function' ? tpl.key(key) : tpl.key; tpl = tpl.def; } const val = internalTemplate(tpl, srcObj[key], opt, srcObj); if (val !== undefined) result[newKey] = val; } }   // 处理模板中存在但原对象中不存在的字段 for (const key of defKeys) { if (key === allKey || srcObj.hasOwnProperty(key)) continue; let tpl = def[key]; let newKey = key; while (tpl instanceof TemplateRename) { newKey = typeof tpl.key === 'function' ? tpl.key(key) : tpl.key; tpl = tpl.def; } const val = internalTemplate(tpl, undefined, opt, srcObj); if (val !== undefined) result[newKey] = val; } return result; }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a> at 2025-06-30T10:16:27.157Z