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uni-im示例/uni_modules/uni-im/uniCloud/database/uni-id-users.schema.ext.js

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+// schema扩展相关文档请参阅：https://uniapp.dcloud.net.cn/uniCloud/jql-schema-ext.html
+const db = uniCloud.database();
+const dbCmd = db.command
+module.exports = {
+	trigger: {
+		async afterReadAsSecondaryCollection(e) {
+			await afterReadAction(e, true)
+		},
+		async afterRead(e) {
+			await afterReadAction(e)
+		}
+	}
+}
+
+async function afterReadAction({
+	field,
+	result,
+	userInfo: currentUserInfo,
+	primaryCollection
+} = {}, asSecondaryCollection = false) {
+	if (result && field && field.includes("nickname")) {
+		//uni-im 处理查询nickname，但值为空的情况
+		let {
+			data
+		} = result
+		
+    if( !Array.isArray(data) ){
+      // 说明走了 getOne
+      data = [data]
+    }
+    
+		// 为联查 且为副表时的字段
+		if (asSecondaryCollection && typeof(data[0]) == "object") {
+			let foreignKeysObj = {
+				"uni-im-group-member":"user_id",
+				"uni-im-friend":"friend_uid"
+			}
+			let foreignKey = foreignKeysObj[primaryCollection]
+			
+			if(foreignKey in data[0]){
+				data = data.map(item => item[foreignKey][0])
+			}else{
+        return console.log('触发器uni-id-users.schema.ext.js，未在当前操作生效。如需应用此触发器，请补充：主表表名及其foreignKey的值，到触发器uni-id-users.schema.ext.js的变量foreignKeysObj内');
+			}
+		}
+
+		// console.log('data',data);
+		if (!Array.isArray(data)) {
+			data = [data]
+		}
+		// 记录没有nickname的用户id
+		let user_ids = [],
+			usersInfo = {};
+		data.forEach(item => {
+			if (item && !item.nickname) {
+				user_ids.push(item._id)
+			}
+		})
+		if (user_ids.length) {
+			console.info('注意：uni-im项目用户数据依赖nickname。有' + user_ids.length +
+				`个用户数据 nickname 的值为空，已多执行一次数据库查询：将此用户的“用户名”或“邮箱”或“手机号”脱敏后，作为nickname输出。请引导用户完善nickname，减少查库次数`)
+			let res = await db.collection('uni-id-users')
+				.where({
+					_id: dbCmd.in(user_ids)
+				})
+				.field({
+					username: true,
+					email: true,
+					mobile: true
+				})
+				.limit(1000)
+				.get()
+			usersInfo = res.data.reduce((sum, current) => {
+				sum[current._id] = current
+				return sum
+			}, {})
+		}
+
+		let isUniImAdmin = currentUserInfo.role.includes('uni-im-admin') || currentUserInfo.role.includes('admin')
+
+		data.forEach(item => {
+			if (!item.nickname) {
+				let userInfo = usersInfo[item._id]
+				// 管理员可以看到不打码的
+				if (isUniImAdmin) {
+					item.nickname = userInfo.username || userInfo.email || userInfo.mobile
+				}else{
+					item.nickname = hideUsernameStr(userInfo.username) || hideEmailStr(userInfo.email) ||
+											hideMobileStr(userInfo.mobile)
+				}
+			}else if(!isUniImAdmin && item.nickname.includes('@')){
+				// 禁止昵称用邮箱 脱敏处理
+				item.nickname = hideEmailStr(item.nickname)
+			}
+
+			// 特殊处理某个用户xxx
+			if (item._id == "xxx") {
+				item.nickname = "xxx"
+				item.avatar_file = {
+					url: "xxx"
+				}
+			}
+
+		})
+
+		function hideUsernameStr(username) {
+			if (username == undefined) {
+				return false
+			}
+			let length = username.length
+			let n = parseInt(length / 2.5) * 2
+			return username.substr(0, length - n) + '**' + username.substr(-1 * n / 2)
+		}
+
+		function hideEmailStr(email) {
+			if (email == undefined) {
+				return false
+			}
+			const content = email.split("@")
+			return content[0].substr(0, content[0].length - 2) + '**' + content[1]
+		}
+
+		function hideMobileStr(mobile) {
+			if (mobile == undefined) {
+				return false
+			}
+			return mobile.substr(0, 3) + '****' + mobile.substr(-1 * 4)
+		}
+	}
+}