Fix send mail (#13312)

* Fix send mail

* Fix send mail

* Update modules/private/mail.go

Co-authored-by: techknowlogick <matti@mdranta.net>

cmd/mailer.go

 	"net/http"
 
 	"code.gitea.io/gitea/modules/private"
+	"code.gitea.io/gitea/modules/setting"
 	"github.com/urfave/cli"
 )
 
 func runSendMail(c *cli.Context) error {
+	setting.NewContext()
+
 	if err := argsSet(c, "title"); err != nil {
 		return err
 	}
 
 	status, message := private.SendEmail(subject, body, nil)
 	if status != http.StatusOK {
-		fmt.Printf("error: %s", message)
+		fmt.Printf("error: %s\n", message)
 		return nil
 	}
 
-	fmt.Printf("Succseded: %s", message)
+	fmt.Printf("Success: %s\n", message)
 
 	return nil
 }

modules/private/mail.go

 		return http.StatusInternalServerError, fmt.Sprintf("Response body error: %v", err.Error())
 	}
 
-	return http.StatusOK, fmt.Sprintf("Was sent %s from %d", body, len(to))
+	var users = fmt.Sprintf("%d", len(to))
+	if len(to) == 0 {
+		users = "all"
+	}
+
+	return http.StatusOK, fmt.Sprintf("Sent %s email(s) to %s users", body, users)
 }

routers/private/mail.go

 package private
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/http"
 	"strconv"
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/private"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/services/mailer"
 	"gitea.com/macaron/macaron"
 )
 // SendEmail pushes messages to mail queue
 //
 // It doesn't wait before each message will be processed
-func SendEmail(ctx *macaron.Context, mail private.Email) {
+func SendEmail(ctx *macaron.Context) {
+	if setting.MailService == nil {
+		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+			"err": "Mail service is not enabled.",
+		})
+		return
+	}
+
+	var mail private.Email
+	rd := ctx.Req.Body().ReadCloser()
+	defer rd.Close()
+	if err := json.NewDecoder(rd).Decode(&mail); err != nil {
+		log.Error("%v", err)
+		ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+			"err": err,
+		})
+		return
+	}
+
 	var emails []string
 	if len(mail.To) > 0 {
 		for _, uname := range mail.To {
 				return
 			}
 
-			if user != nil {
+			if user != nil && len(user.Email) > 0 {
 				emails = append(emails, user.Email)
 			}
 		}
 	} else {
 		err := models.IterateUser(func(user *models.User) error {
-			emails = append(emails, user.Email)
+			if len(user.Email) > 0 {
+				emails = append(emails, user.Email)
+			}
 			return nil
 		})
 		if err != nil {