user.js

const express = require('express')
const router = express.Router()
const mongoose = require('mongoose')
const requiredLogin=require("../middlewares/requirelogin")
const Post = mongoose.model("Post")
const User = mongoose.model("User")


router.get('/user/:id',requiredLogin,(req,res)=>{
    User.findOne({_id:req.params.id})
    .select("-password")
    .then(user=>{
        Post.find({postedBy:req.params.id})
        .populate("postedBy","_id name")
        .exec((err,post)=>{
            if(err){
                return res.status(422).json({error:err})
            }
            res.json({user,post})
        })
    })
    .catch(err=>{
        return res.status(404).json({error:"User not found"})
    })
})

router.put('/follow',requiredLogin,(req,res)=>{
    User.findByIdAndUpdate(req.body.followId,{
        $push:{followers:req.user._id},
    },{
        new:true
    },(err,result)=>{
        if(err){
            return res.status(422).json({error:err})
        }  
        User.findByIdAndUpdate(req.user._id,{
            $push:{following:req.body.followId}
        },{
            new:true
        }).select("-password").then(result=>{
            res.json(result)
        }).catch(err=>{
            return res.status(422).json({error:err})
        }) 
    }
    )
})

router.put('/unfollow',requiredLogin,(req,res)=>{
    User.findByIdAndUpdate(req.body.unfollowId,{
        $pull:{followers:req.user._id},
    },{
        new:true
    },(err,result)=>{
        if(err){
            return res.status(422).json({error:err})
        }  
        User.findByIdAndUpdate(req.user._id,{
            $pull:{following:req.body.unfollowId}
        },{
            new:true
        }).select("-password").then(result=>{
            res.json(result)
        }).catch(err=>{
            return res.status(422).json({error:err})
        }) 
    }
    )
})

router.put('/updatepic',requiredLogin,(req,res)=>{
    User.findByIdAndUpdate(req.user._id,{$set:{pic:req.body.pic}},{new:true},(err,result)=>{
        if(err) return res.status(422).json({error:"pic cannot post"}) 
        res.json(result)  
    })
})

router.put('/search-users',(req,res)=>{
    let userPattern = new RegExp("^"+req.body.query)
    if(req.body.query==="") return res.json({});
    User.find({name:{$regex:userPattern}})
    .select("_id name pic")
    .then(user=>{
        res.json({user})
    })
    .catch(err=>{
        console.log(err)
    })
})

module.exports = router