smtp + email confirmation (#285)

* add smtp configuration

* add email confirm + reset templates

* add email sender to testrig

* flesh out the email sender interface

* go fmt

* golint

* update from field with more clarity

* tidy up the email formatting

* fix tests

* add email sender to processor

* tidy client api processing a bit

* further tidying in fromClientAPI

* pin new account to user

* send msg to processor on new account creation

* generate confirm email uri

* remove emailer from account processor again

* add processCreateAccountFromClientAPI

* move emailer accountprocessor => userprocessor

* add email sender to user processor

* SendConfirmEmail function

* add noop email sender

* use noop email sender in tests

* only assemble message if callback is not nil

* use noop email sender if no smtp host is defined

* minify email html before sending

* fix wrong email address

* email confirm test

* fmt

* serve web hndler

* add email confirm handler

* init test log properly on testrig

* log emails that *would* have been sent

* go fmt ./...

* unexport confirm email handler

* updatedAt

* test confirm email function

* don't allow tokens older than 7 days

* change error message a bit

* add basic smtp docs

* add a few more snippets

* typo

* add email sender to outbox tests

* don't use dutch wikipedia link

* don't minify email html

1 files changed, 12 insertions, 5 deletions

diff --git a/internal/processing/user/user.go b/internal/processing/user/user.go
index c572becc2..73cdb4901 100644
--- a/internal/processing/user/user.go
+++ b/internal/processing/user/user.go
@@ -23,6 +23,7 @@ import (
 
 	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/email"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
@@ -32,17 +33,23 @@ type Processor interface {
 	// ChangePassword changes the specified user's password from old => new,
 	// or returns an error if the new password is too weak, or the old password is incorrect.
 	ChangePassword(ctx context.Context, user *gtsmodel.User, oldPassword string, newPassword string) gtserror.WithCode
+	// SendConfirmEmail sends a 'confirm-your-email-address' type email to a user.
+	SendConfirmEmail(ctx context.Context, user *gtsmodel.User, username string) error
+	// ConfirmEmail confirms an email address using the given token.
+	ConfirmEmail(ctx context.Context, token string) (*gtsmodel.User, gtserror.WithCode)
 }
 
 type processor struct {
-	config *config.Config
-	db     db.DB
+	config      *config.Config
+	emailSender email.Sender
+	db          db.DB
 }
 
 // New returns a new user processor
-func New(db db.DB, config *config.Config) Processor {
+func New(db db.DB, emailSender email.Sender, config *config.Config) Processor {
 	return &processor{
-		config: config,
-		db:     db,
+		config:      config,
+		emailSender: emailSender,
+		db:          db,
 	}
 }