Database updates (#144)

* start moving some database stuff around

* continue moving db stuff around

* more fiddling

* more updates

* and some more

* and yet more

* i broke SOMETHING but what, it's a mystery

* tidy up

* vendor ttlcache

* use ttlcache

* fix up some tests

* rename some stuff

* little reminder

* some more updates

1 files changed, 53 insertions, 0 deletions

diff --git a/internal/db/admin.go b/internal/db/admin.go
new file mode 100644
index 000000000..aa2b22f47
--- /dev/null
+++ b/internal/db/admin.go
@@ -0,0 +1,53 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package db
+
+import (
+	"net"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// Admin contains functions related to instance administration (new signups etc).
+type Admin interface {
+	// IsUsernameAvailable checks whether a given username is available on our domain.
+	// Returns an error if the username is already taken, or something went wrong in the db.
+	IsUsernameAvailable(username string) Error
+
+	// IsEmailAvailable checks whether a given email address for a new account is available to be used on our domain.
+	// Return an error if:
+	// A) the email is already associated with an account
+	// B) we block signups from this email domain
+	// C) something went wrong in the db
+	IsEmailAvailable(email string) Error
+
+	// NewSignup creates a new user in the database with the given parameters.
+	// By the time this function is called, it should be assumed that all the parameters have passed validation!
+	NewSignup(username string, reason string, requireApproval bool, email string, password string, signUpIP net.IP, locale string, appID string, emailVerified bool, admin bool) (*gtsmodel.User, Error)
+
+	// CreateInstanceAccount creates an account in the database with the same username as the instance host value.
+	// Ie., if the instance is hosted at 'example.org' the instance user will have a username of 'example.org'.
+	// This is needed for things like serving files that belong to the instance and not an individual user/account.
+	CreateInstanceAccount() Error
+
+	// CreateInstanceInstance creates an instance in the database with the same domain as the instance host value.
+	// Ie., if the instance is hosted at 'example.org' the instance will have a domain of 'example.org'.
+	// This is needed for things like serving instance information through /api/v1/instance
+	CreateInstanceInstance() Error
+}