sign_in.go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
)

// MessagePost: POST
func SignIn(w http.ResponseWriter, r *http.Request) {

	// We need to use to use the struct model to map the json data to

	type ResponseBody struct {
		Token string `json:"token"`
	}

	var jsonResponse UserSignup

	// We decode the incoming data and convert it to a json
	json.NewDecoder(r.Body).Decode(&jsonResponse)
	println("incoming user data ", jsonResponse.Name, jsonResponse.Pin)

	// if user exists process to the next step
	if RedisClient.HExists("users", jsonResponse.Name).Val() == true {
		// Check if user and password before giving a token
		redisUser, err := RedisClient.HGet("users", jsonResponse.Name).Result()
		if err != nil {
			println(err)
		}

		fmt.Println("Got the user", redisUser)

		// Unmarshal the Json from Redis
		var redisJson UserSignup
		bytes := []byte(redisUser)
		err2 := json.Unmarshal(bytes, &redisJson)
		if err2 != nil {
			panic(err2)
		}

		println("Redis user data ", redisJson.Name, redisJson.Pin)
		// checkName := jsonResponse.Name != redisJson.Name

		if redisJson.Pin == jsonResponse.Pin && jsonResponse.Name == redisJson.Name {
			println("user and password match send a tooken")
			// Password is correct send him/her a token brother
			json.NewEncoder(w).Encode(ResponseBody{
				Token: CreateToken(jsonResponse.Name),
			})
		} else {
			println("Not matching user and password ")
			// user pass is wrong send back message
			json.NewEncoder(w).Encode(UserResponse{
				Message: "Invalid Credentials",
			})
		}
	} else {
		json.NewEncoder(w).Encode(UserResponse{
			Message: "Invalid Credentials",
			User:    jsonResponse.Name,
		})
	}

}