54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
JavaScript
const cloud = require('wx-server-sdk')
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cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
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const db = cloud.database()
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exports.main = async (event, context) => {
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const { OPENID } = cloud.getWXContext()
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const { toUserId, petId } = event
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if (!toUserId) return { code: -1, message: '缺少目标用户' }
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if (toUserId === OPENID) return { code: -1, message: '不能给自己打招呼' }
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try {
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// 防刷：5分钟内同一对用户只能打一次招呼
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const cooldownMs = 5 * 60 * 1000
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const recent = await db.collection('messages')
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.where({
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fromId: OPENID,
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toId: toUserId,
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type: 'greeting',
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createdAt: db.command.gt(new Date(Date.now() - cooldownMs).toISOString()),
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})
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.count()
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if (recent.total > 0) {
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return { code: -1, message: '打招呼太频繁了，稍后再试' }
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}
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// 获取发送者信息
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const senderRes = await db.collection('users')
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.where({ openid: OPENID })
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.field({ nickName: true, pets: true })
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.get()
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const sender = senderRes.data[0]
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const pet = sender?.pets?.find(p => p._id === petId) || sender?.pets?.[0]
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const greeting = `${sender?.nickName || '小伙伴'} 想认识你的宠物！${pet ? `TA 的 ${pet.name} 向你打了个招呼 🐾` : '来聊聊吧 🐾'}`
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await db.collection('messages').add({
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data: {
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fromId: OPENID,
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toId: toUserId,
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content: greeting,
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type: 'greeting',
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isRead: false,
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createdAt: db.serverDate(),
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},
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})
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return { code: 0, data: null }
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} catch (e) {
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return { code: -1, message: e.message }
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}
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}
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