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feedback.go
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feedback.go
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package services
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/smtp"
"text/template"
"github.com/baza-trainee/ataka-help-backend/app/config"
"github.com/baza-trainee/ataka-help-backend/app/structs"
)
type FeedbackService struct {
auth smtp.Auth
templateFile *template.Template
message structs.Message
captchaKey string
smtpServer string
port string
}
func NewFeedbackService(cfg config.SMTP) (FeedbackService, error) {
auth := smtp.PlainAuth(
"",
cfg.MailAccount,
cfg.AccountPassword,
cfg.SMTPServerAddress,
)
template, err := template.ParseFiles(templatPath)
if err != nil {
return FeedbackService{}, fmt.Errorf("error in PasreFiles(): %w", err)
}
message := structs.Message{
From: cfg.MailAccount,
To: cfg.MailAccount,
Subject: "AtakHelp Feedback",
}
return FeedbackService{
auth: auth,
templateFile: template,
message: message,
captchaKey: cfg.CaptchaKey,
smtpServer: cfg.SMTPServerAddress,
port: cfg.SMTPPort,
}, nil
}
func (f FeedbackService) PassFeedback(ctx context.Context, feedback structs.Feedback) error {
ok, err := f.checkGoogleCaptcha(ctx, feedback.Token, f.captchaKey)
if err != nil {
return fmt.Errorf("error in checkGoogleCaptcha(): %w", err)
}
if !ok {
return structs.ErrCheckCaptcha
}
var body bytes.Buffer
if err := f.templateFile.Execute(&body, feedback); err != nil {
return fmt.Errorf("error in templateFile.Execute(): %w", err)
}
if err := f.sendMail(body); err != nil {
return err
}
return nil
}
func (f FeedbackService) checkGoogleCaptcha(ctx context.Context, token, googleCaptcha string) (bool, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://www.google.com/recaptcha/api/siteverify", nil)
if err != nil {
return false, fmt.Errorf("error in http.NewRequest(): %w", err)
}
pathQuery := req.URL.Query()
pathQuery.Add("secret", googleCaptcha)
pathQuery.Add("response", token)
req.URL.RawQuery = pathQuery.Encode()
client := &http.Client{}
var googleResponse map[string]interface{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return false, fmt.Errorf("error in io.ReadAll(): %w", err)
}
if err := json.Unmarshal(body, &googleResponse); err != nil {
return false, fmt.Errorf("error in json.Unmarshal(): %w", err)
}
isValid, ok := googleResponse["success"].(bool)
if !ok {
return false, fmt.Errorf("error in the assertion: %w", err)
}
return isValid, nil
}
func (f FeedbackService) sendMail(body bytes.Buffer) error {
f.message.Buffer = bytes.NewBuffer(make([]byte, 256))
f.message.Buffer.Reset()
f.message.SetHeader("MIME-Version", "1.0")
f.message.SetHeader("From", f.message.From)
f.message.SetHeader("To", f.message.To)
f.message.SetHeader("Subject", f.message.Subject)
f.message.SetHeader("Content-Type", "text/html; charset=UTF-8")
f.message.Buffer.WriteString("\r\n")
f.message.AddBody(body.String(), "text/html")
err := smtp.SendMail(
f.smtpServer+":"+f.port,
f.auth,
f.message.From,
[]string{f.message.To},
f.message.Buffer.Bytes(),
)
if err != nil {
return fmt.Errorf("error in smtp.SendMai(): %w", err)
}
return nil
}