[feature] implement custom_emojis endpoint (#563)

* implement custom_emojis api endpoint

* add tests for getting custom emoji out of the database and converting to api emoji

* change sort direction of emoji query

* change logging level and initialize array with known length as per kim's suggestions

* add continue to lessen risk of making a malformed struct during conversion from db to api emojis

internal/db/bundb/bundb.go

@@ -77,6 +77,7 @@ type bunDBService struct {
 	db.Admin
 	db.Basic
 	db.Domain
+	db.Emoji
 	db.Instance
 	db.Media
 	db.Mention
@@ -168,6 +169,9 @@ func NewBunDBService(ctx context.Context) (db.DB, error) {
 		Domain: &domainDB{
 			conn: conn,
 		},
+		Emoji: &emojiDB{
+			conn: conn,
+		},
 		Instance: &instanceDB{
 			conn: conn,
 		},

internal/db/bundb/emoji.go

@@ -0,0 +1,46 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 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 bundb
+
+import (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+type emojiDB struct {
+	conn *DBConn
+}
+
+func (e emojiDB) GetCustomEmojis(ctx context.Context) ([]*gtsmodel.Emoji, db.Error) {
+	emojis := []*gtsmodel.Emoji{}
+
+	q := e.conn.
+		NewSelect().
+		Model(&emojis).
+		Where("visible_in_picker = true").
+		Where("disabled = false").
+		Order("shortcode ASC")
+
+	if err := q.Scan(ctx); err != nil {
+		return nil, e.conn.ProcessError(err)
+	}
+	return emojis, nil
+}

internal/db/bundb/emoji_test.go

@@ -0,0 +1,42 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 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 bundb_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type EmojiTestSuite struct {
+	BunDBStandardTestSuite
+}
+
+func (suite *EmojiTestSuite) TestGetCustomEmojis() {
+	emojis, err := suite.db.GetCustomEmojis(context.Background())
+
+	suite.NoError(err)
+	suite.Equal(1, len(emojis))
+	suite.Equal("rainbow", emojis[0].Shortcode)
+}
+
+func TestEmojiTestSuite(t *testing.T) {
+	suite.Run(t, new(EmojiTestSuite))
+}

internal/db/db.go

@@ -35,6 +35,7 @@ type DB interface {
 	Admin
 	Basic
 	Domain
+	Emoji
 	Instance
 	Media
 	Mention

internal/db/emoji.go

@@ -0,0 +1,31 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 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 (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// Emoji contains functions for getting emoji in the database.
+type Emoji interface {
+	// GetCustomEmojis gets all custom emoji for the instance
+	GetCustomEmojis(ctx context.Context) ([]*gtsmodel.Emoji, Error)
+}