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| 1 | +import './App.scss'; |
| 2 | +import avatar from './images/bozai.png' |
| 3 | +import {useEffect, useRef, useState} from 'react' |
| 4 | +import _ from 'lodash' |
| 5 | +import classNames from 'classnames' |
| 6 | +import {v4 as uuidV4} from 'uuid' |
| 7 | +import dayjs from 'dayjs' |
| 8 | +import axios from "axios" |
| 9 | + |
| 10 | +// 评论列表数据 |
| 11 | +const list = [ |
| 12 | + { |
| 13 | + "rpid": 3, |
| 14 | + "user": { |
| 15 | + "uid": "13258165", |
| 16 | + "avatar": "http://toutiao.itheima.net/resources/images/98.jpg", |
| 17 | + "uname": "周杰伦" |
| 18 | + }, |
| 19 | + "content": "哎哟，不错哦", |
| 20 | + "ctime": "10-18 08: 15", |
| 21 | + "like": 126 |
| 22 | + }, |
| 23 | + { |
| 24 | + "rpid": 2, |
| 25 | + "user": { |
| 26 | + "uid": "36080105", |
| 27 | + "avatar": "http://toutiao.itheima.net/resources/images/98.jpg", |
| 28 | + "uname": "许嵩" |
| 29 | + }, |
| 30 | + "content": "我寻你千百度 日出到迟暮", |
| 31 | + "ctime": "11-13 11: 29", |
| 32 | + "like": 88 |
| 33 | + }, |
| 34 | + { |
| 35 | + "rpid": 1, |
| 36 | + "user": { |
| 37 | + "uid": "30009257", |
| 38 | + "avatar": avatar, |
| 39 | + "uname": "黑马前端" |
| 40 | + }, |
| 41 | + "content": "学前端就来黑马", |
| 42 | + "ctime": "10-19 09: 00", |
| 43 | + "like": 66 |
| 44 | + } |
| 45 | +] |
| 46 | + |
| 47 | +// 当前登录用户信息 |
| 48 | +const user = { |
| 49 | + uid: '30009257', |
| 50 | + avatar, |
| 51 | + uname: 'bo' |
| 52 | +} |
| 53 | + |
| 54 | +// 导航 Tab 数组 |
| 55 | +const tabs = [ |
| 56 | + {type: 'hot', text: '最热'}, |
| 57 | + {type: 'time', text: '最新'} |
| 58 | +] |
| 59 | + |
| 60 | +// 自定义 hook 封装数据请求 |
| 61 | +function useGetList() { |
| 62 | + // 获取接口数据 |
| 63 | + const [commentList, setCommentList] = useState([]) |
| 64 | + useEffect(() => { |
| 65 | + async function getList() { |
| 66 | + const res = await axios.get('http://localhost:3001/list') |
| 67 | + setCommentList(res.data) |
| 68 | + } |
| 69 | + |
| 70 | + getList() |
| 71 | + }, []) |
| 72 | + |
| 73 | + return { |
| 74 | + commentList, |
| 75 | + setCommentList |
| 76 | + } |
| 77 | +} |
| 78 | + |
| 79 | +// 封装评论 Item 组件 |
| 80 | +function Item({item, onDel}) { |
| 81 | + return ( |
| 82 | + <div className="reply-item"> |
| 83 | + {/* 头像 */} |
| 84 | + <div className="root-reply-avatar"> |
| 85 | + <div className="bili-avatar"> |
| 86 | + <img |
| 87 | + className="bili-avatar-img" |
| 88 | + alt="" |
| 89 | + src={item.user.avatar} |
| 90 | + /> |
| 91 | + </div> |
| 92 | + </div> |
| 93 | + |
| 94 | + <div className="content-wrap"> |
| 95 | + {/* 用户名 */} |
| 96 | + <div className="user-info"> |
| 97 | + <div className="user-name">{item.user.uname}</div> |
| 98 | + </div> |
| 99 | + {/* 评论内容 */} |
| 100 | + <div className="root-reply"> |
| 101 | + <span className="reply-content">{item.content}</span> |
| 102 | + <div className="reply-info"> |
| 103 | + {/* 评论时间 */} |
| 104 | + <span className="reply-time">{item.ctime}</span> |
| 105 | + {/* 评论数量 */} |
| 106 | + <span className="reply-time">点赞数:{item.like}</span> |
| 107 | + {/* 条件：user.id === item.user.id */} |
| 108 | + {user.uid === item.user.uid && |
| 109 | + <span className='delete-btn' onClick={() => onDel(item.rpid)}> |
| 110 | + 删除 |
| 111 | + </span>} |
| 112 | + </div> |
| 113 | + </div> |
| 114 | + </div> |
| 115 | + </div> |
| 116 | + ) |
| 117 | +} |
| 118 | + |
| 119 | +function App() { |
| 120 | + // 渲染评论列表 |
| 121 | + // 1. 使用 useState 维护 list |
| 122 | + // const [commentList, setCommentList] = useState(_.orderBy(list, 'like', 'desc')) |
| 123 | + |
| 124 | + const {commentList, setCommentList} = useGetList() |
| 125 | + |
| 126 | + // 删除功能 |
| 127 | + const handleDel = (id) => { |
| 128 | + // 对 commentList 做过滤处理 |
| 129 | + setCommentList(commentList.filter(item => item.rpid !== id)) |
| 130 | + } |
| 131 | + |
| 132 | + // tab 切换功能 |
| 133 | + // 1. 点击谁就把谁的 type 记录下来 |
| 134 | + // 2. 通过记录的 type 和每一项遍历时的 type 做匹配，控制激活类名的显示 |
| 135 | + const [type, setType] = useState('hot') |
| 136 | + const handleTabChange = (type) => { |
| 137 | + setType(type) |
| 138 | + // 基于列表的排序 |
| 139 | + if (type === 'hot') { |
| 140 | + // 根据点赞数排序 |
| 141 | + setCommentList(_.orderBy(commentList, 'like', 'desc')) |
| 142 | + } else { |
| 143 | + // 根据创建时间排序 |
| 144 | + setCommentList(_.orderBy(commentList, 'ctime', 'desc')) |
| 145 | + } |
| 146 | + } |
| 147 | + |
| 148 | + // 发表评论 |
| 149 | + const [content, setContent] = useState('') |
| 150 | + const inputRef = useRef(null); |
| 151 | + const handlePublish = () => { |
| 152 | + setCommentList([ |
| 153 | + ...commentList, |
| 154 | + { |
| 155 | + "rpid": uuidV4(), |
| 156 | + "user": user, |
| 157 | + "content": content, |
| 158 | + "ctime": dayjs().format('MM-DD HH:mm'), |
| 159 | + "like": 66 |
| 160 | + } |
| 161 | + ]) |
| 162 | + // 1. 清空输入框内容 |
| 163 | + setContent('') |
| 164 | + // 2. 重新聚焦 |
| 165 | + inputRef.current.focus() |
| 166 | + } |
| 167 | + |
| 168 | + return ( |
| 169 | + <div className="app"> |
| 170 | + {/* 导航 Tab */} |
| 171 | + <div className="reply-navigation"> |
| 172 | + <ul className="nav-bar"> |
| 173 | + <li className="nav-title"> |
| 174 | + <span className="nav-title-text">评论</span> |
| 175 | + {/* 评论数量 */} |
| 176 | + <span className="total-reply">{10}</span> |
| 177 | + </li> |
| 178 | + <li className="nav-sort"> |
| 179 | + {/* 高亮类名： active */} |
| 180 | + {tabs.map(item => ( |
| 181 | + <span |
| 182 | + key={item.type} |
| 183 | + className={classNames('nav-item', {active: type === item.type})} |
| 184 | + onClick={() => handleTabChange(item.type)} |
| 185 | + > |
| 186 | + {item.text} |
| 187 | + </span> |
| 188 | + ))} |
| 189 | + </li> |
| 190 | + </ul> |
| 191 | + </div> |
| 192 | + |
| 193 | + <div className="reply-wrap"> |
| 194 | + {/* 发表评论 */} |
| 195 | + <div className="box-normal"> |
| 196 | + {/* 当前用户头像 */} |
| 197 | + <div className="reply-box-avatar"> |
| 198 | + <div className="bili-avatar"> |
| 199 | + <img className="bili-avatar-img" src={avatar} alt="用户头像" /> |
| 200 | + </div> |
| 201 | + </div> |
| 202 | + <div className="reply-box-wrap"> |
| 203 | + {/* 评论框 */} |
| 204 | + <textarea |
| 205 | + className="reply-box-textarea" |
| 206 | + placeholder="发一条友善的评论" |
| 207 | + value={content} |
| 208 | + ref={inputRef} |
| 209 | + onChange={(e) => setContent(e.target.value)} |
| 210 | + /> |
| 211 | + {/* 发布按钮 */} |
| 212 | + <div className="reply-box-send"> |
| 213 | + <div className="send-text" onClick={handlePublish}>发布</div> |
| 214 | + </div> |
| 215 | + </div> |
| 216 | + </div> |
| 217 | + {/* 评论列表 */} |
| 218 | + <div className="reply-list"> |
| 219 | + {/* 评论项 */} |
| 220 | + {commentList.map(item => ( |
| 221 | + <Item key={item.rpid} item={item} onDel={handleDel} /> |
| 222 | + ))} |
| 223 | + |
| 224 | + </div> |
| 225 | + </div> |
| 226 | + </div> |
| 227 | + ) |
| 228 | +} |
| 229 | + |
| 230 | +export default App |
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