validate.go

package main

import (
	"encoding/json"
	"errors"
	"net/http"
	"slices"
	"strings"
)

// validate_chirp checks if the received message has the length of 140 or below.
func validate_chirp(r *http.Request) (string, error) {
	var bad_words = []string{
		"kerfuffle",
		"sharbert",
		"fornax",
	}

	type message struct {
		Body string `json:"body"`
	}

	// json receive part
	decoder := json.NewDecoder(r.Body)
	msg := message{}

	err := decoder.Decode(&msg)

	if err != nil {
		return "", err
	}

	// validate message
	l := len(msg.Body)
	if l > 0 && l <= 140 {
		resp := Sanitize(msg.Body, bad_words)
		return resp, nil
	} else if l > 140 {
		return "", errors.New("message too long: message > 140 characters")
	} else {
		return "", errors.New("something went wrong during validation")
	}
}

func Sanitize(s string, words []string) string {
	var return_text []string
	toSlice := strings.Split(s, " ")
	for _, word := range toSlice {
		if slices.Contains(words, strings.ToLower(word)) {
			return_text = append(return_text, "****")
		} else {
			return_text = append(return_text, word)
		}
	}
	return strings.Join(return_text, " ")
}

// func validate_chirp(w http.ResponseWriter, r *http.Request) {
// 	var bad_words = []string{
// 		"kerfuffle",
// 		"sharbert",
// 		"fornax",
// 	}

// 	type message struct {
// 		Body string `json:"body"`
// 	}

// 	type cleaned_body struct {
// 		Cleaned_body string `json:"cleaned_body"`
// 	}

// 	// json receive part
// 	decoder := json.NewDecoder(r.Body)
// 	msg := message{}

// 	err := decoder.Decode(&msg)

// 	if err != nil {
// 		log.Printf("Error decoding message body: %s", err)
// 		w.WriteHeader(500)
// 		return
// 	}

// 	// validate message
// 	l := len(msg.Body)
// 	if l > 0 && l <= 140 {
// 		resp := cleaned_body{Cleaned_body: Sanitize(msg.Body, bad_words)}
// 		respondWithJSON(w, 200, resp)

// 	} else if l > 140 {
// 		msg := "Chirp is too long"
// 		respondWithError(w, 400, msg)
// 	} else {
// 		msg := "Something went wrong"
// 		respondWithError(w, 400, msg)
// 	}

// }