Add k/v store for repo settings

models/migrations/migrations.go

@@ -453,6 +453,8 @@ var migrations = []Migration{
 	NewMigration("Add updated unix to LFSMetaObject", v1_19.AddUpdatedUnixToLFSMetaObject),
 	// v239 -> v240
 	NewMigration("Add scope for access_token", v1_19.AddScopeForAccessTokens),
+	// v240 -> v241
+	NewMigration("Create key/value table for repo settings", v1_19.CreateRepoSettingsTable),
 }
 
 // GetCurrentDBVersion returns the current db version

models/migrations/v1_19/v240.go

@@ -0,0 +1,23 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_19 //nolint
+
+import (
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/xorm"
+)
+
+func CreateRepoSettingsTable(x *xorm.Engine) error {
+	type RepoSetting struct {
+		ID           int64              `xorm:"pk autoincr"`
+		RepoID       int64              `xorm:"index unique(key_repoid)"`              // to load all of someone's settings
+		SettingKey   string             `xorm:"varchar(255) index unique(key_repoid)"` // ensure key is always lowercase
+		SettingValue string             `xorm:"text"`
+		Version      int                `xorm:"version"` // prevent to override
+		Created      timeutil.TimeStamp `xorm:"created"`
+		Updated      timeutil.TimeStamp `xorm:"updated"`
+	}
+	return x.Sync2(new(RepoSetting))
+}

models/repo/setting.go

@@ -0,0 +1,246 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/cache"
+	setting_module "code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/builder"
+)
+
+// genSettingCacheKey returns the cache key for some configuration
+func genSettingCacheKey(repoID int64, key string) string {
+	return fmt.Sprintf("repo.setting.%d.%s", repoID, key)
+}
+
+// Setting is a key value store of repo settings
+type Setting struct {
+	ID           int64              `xorm:"pk autoincr"`
+	RepoID       int64              `xorm:"index unique(key_repoid)"`              // to load all of someone's settings
+	SettingKey   string             `xorm:"varchar(255) index unique(key_repoid)"` // ensure key is always lowercase
+	SettingValue string             `xorm:"text"`
+	Version      int                `xorm:"version"` // prevent to override
+	Created      timeutil.TimeStamp `xorm:"created"`
+	Updated      timeutil.TimeStamp `xorm:"updated"`
+}
+
+// TableName sets the table name for the settings struct
+func (s *Setting) TableName() string {
+	return "repo_setting"
+}
+
+func (s *Setting) GetValueBool() bool {
+	if s == nil {
+		return false
+	}
+
+	b, _ := strconv.ParseBool(s.SettingValue)
+	return b
+}
+
+func init() {
+	db.RegisterModel(new(Setting))
+}
+
+// ErrSettingIsNotExist represents an error that a setting is not exist with special key
+type ErrSettingIsNotExist struct {
+	RepoID int64
+	Key    string
+}
+
+// Error implements error
+func (err ErrSettingIsNotExist) Error() string {
+	return fmt.Sprintf("Repo[%d] setting[%s] is not exist", err.RepoID, err.Key)
+}
+
+// IsErrSettingIsNotExist return true if err is ErrSettingIsNotExist
+func IsErrSettingIsNotExist(err error) bool {
+	_, ok := err.(ErrSettingIsNotExist)
+	return ok
+}
+
+// GetSettingNoCache returns specific setting without using the cache
+func GetSettingNoCache(repoID int64, key string) (*Setting, error) {
+	v, err := GetSettings(repoID, []string{key})
+	if err != nil {
+		return nil, err
+	}
+	if len(v) == 0 {
+		return nil, ErrSettingIsNotExist{repoID, key}
+	}
+	return v[strings.ToLower(key)], nil
+}
+
+func validateRepoSettingKey(key string) error {
+	if len(key) == 0 {
+		return fmt.Errorf("setting key must be set")
+	}
+	if strings.ToLower(key) != key {
+		return fmt.Errorf("setting key should be lowercase")
+	}
+	return nil
+}
+
+// GetSetting returns the setting value via the key
+func GetSetting(repoID int64, key string) (string, error) {
+	if err := validateRepoSettingKey(key); err != nil {
+		return "", err
+	}
+	return cache.GetString(genSettingCacheKey(repoID, key), func() (string, error) {
+		res, err := GetSettingNoCache(repoID, key)
+		if err != nil {
+			return "", err
+		}
+		return res.SettingValue, nil
+	})
+}
+
+// GetSettingBool return bool value of setting,
+// none existing keys and errors are ignored and result in false
+func GetSettingBool(repoID int64, key string) bool {
+	s, _ := GetSetting(repoID, key)
+	v, _ := strconv.ParseBool(s)
+	return v
+}
+
+// GetSettings returns specific settings
+func GetSettings(repoID int64, keys []string) (map[string]*Setting, error) {
+	for i := 0; i < len(keys); i++ {
+		keys[i] = strings.ToLower(keys[i])
+	}
+	settings := make([]*Setting, 0, len(keys))
+	if err := db.GetEngine(db.DefaultContext).
+		Where("repo_id=?", repoID).
+		And(builder.In("setting_key", keys)).
+		Find(&settings); err != nil {
+		return nil, err
+	}
+	settingsMap := make(map[string]*Setting)
+	for _, s := range settings {
+		settingsMap[s.SettingKey] = s
+	}
+	return settingsMap, nil
+}
+
+type AllSettings map[string]*Setting
+
+func (settings AllSettings) Get(key string) Setting {
+	if v, ok := settings[strings.ToLower(key)]; ok {
+		return *v
+	}
+	return Setting{}
+}
+
+func (settings AllSettings) GetBool(key string) bool {
+	b, _ := strconv.ParseBool(settings.Get(key).SettingValue)
+	return b
+}
+
+func (settings AllSettings) GetVersion(key string) int {
+	return settings.Get(key).Version
+}
+
+// GetAllSettings returns all settings from repo
+func GetAllSettings(repoID int64) (AllSettings, error) {
+	settings := make([]*Setting, 0, 5)
+	if err := db.GetEngine(db.DefaultContext).
+		Where("repo_id=?", repoID).
+		Find(&settings); err != nil {
+		return nil, err
+	}
+	settingsMap := make(map[string]*Setting)
+	for _, s := range settings {
+		settingsMap[s.SettingKey] = s
+	}
+	return settingsMap, nil
+}
+
+// DeleteSetting deletes a specific setting for a repo
+func DeleteSetting(repoID int64, key string) error {
+	if err := validateRepoSettingKey(key); err != nil {
+		return err
+	}
+	cache.Remove(genSettingCacheKey(repoID, key))
+	_, err := db.GetEngine(db.DefaultContext).Delete(&Setting{RepoID: repoID, SettingKey: key})
+	return err
+}
+
+func SetSettingNoVersion(repoID int64, key, value string) error {
+	s, err := GetSettingNoCache(repoID, key)
+	if IsErrSettingIsNotExist(err) {
+		return SetSetting(&Setting{
+			RepoID:       repoID,
+			SettingKey:   key,
+			SettingValue: value,
+		})
+	}
+	if err != nil {
+		return err
+	}
+	s.SettingValue = value
+	return SetSetting(s)
+}
+
+// SetSetting updates a users' setting for a specific key
+func SetSetting(setting *Setting) error {
+	if err := upsertSettingValue(setting.RepoID, strings.ToLower(setting.SettingKey), setting.SettingValue, setting.Version); err != nil {
+		return err
+	}
+
+	setting.Version++
+
+	cc := cache.GetCache()
+	if cc != nil {
+		return cc.Put(genSettingCacheKey(setting.RepoID, setting.SettingKey), setting.SettingValue, setting_module.CacheService.TTLSeconds())
+	}
+
+	return nil
+}
+
+func upsertSettingValue(repoID int64, key, value string, version int) error {
+	return db.WithTx(db.DefaultContext, func(ctx context.Context) error {
+		e := db.GetEngine(ctx)
+
+		// here we use a general method to do a safe upsert for different databases (and most transaction levels)
+		// 1. try to UPDATE the record and acquire the transaction write lock
+		//    if UPDATE returns non-zero rows are changed, OK, the setting is saved correctly
+		//    if UPDATE returns "0 rows changed", two possibilities: (a) record doesn't exist  (b) value is not changed
+		// 2. do a SELECT to check if the row exists or not (we already have the transaction lock)
+		// 3. if the row doesn't exist, do an INSERT (we are still protected by the transaction lock, so it's safe)
+		//
+		// to optimize the SELECT in step 2, we can use an extra column like `revision=revision+1`
+		//    to make sure the UPDATE always returns a non-zero value for existing (unchanged) records.
+
+		res, err := e.Exec("UPDATE repo_setting SET setting_value=?, version = version+1 WHERE repo_id=? AND setting_key=? AND version=?", value, repoID, key, version)
+		if err != nil {
+			return err
+		}
+		rows, _ := res.RowsAffected()
+		if rows > 0 {
+			// the existing row is updated, so we can return
+			return nil
+		}
+
+		// in case the value isn't changed, update would return 0 rows changed, so we need this check
+		has, err := e.Exist(&Setting{RepoID: repoID, SettingKey: key})
+		if err != nil {
+			return err
+		}
+		if has {
+			return nil
+		}
+
+		// if no existing row, insert a new row
+		_, err = e.Insert(&Setting{RepoID: repoID, SettingKey: key, SettingValue: value})
+		return err
+	})
+}

models/repo/setting_keys.go

@@ -0,0 +1,4 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo

models/repo/setting_test.go

@@ -0,0 +1,58 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSettings(t *testing.T) {
+	keyName := "test_repo_setting"
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	newSetting := &Setting{RepoID: 99, SettingKey: keyName, SettingValue: "Gitea Repo Setting Test"}
+
+	// create setting
+	err := SetSetting(newSetting)
+	assert.NoError(t, err)
+	// test about saving unchanged values
+	err = SetSetting(newSetting)
+	assert.NoError(t, err)
+
+	// get specific setting
+	settings, err := GetSettings(99, []string{keyName})
+	assert.NoError(t, err)
+	assert.Len(t, settings, 1)
+	assert.EqualValues(t, newSetting.SettingValue, settings[keyName].SettingValue)
+
+	settingValue, err := GetSetting(99, keyName)
+	assert.NoError(t, err)
+	assert.EqualValues(t, newSetting.SettingValue, settingValue)
+
+	settingValue, err = GetSetting(99, "no_such")
+	assert.NoError(t, err)
+	assert.EqualValues(t, "", settingValue)
+
+	// updated setting
+	updatedSetting := &Setting{RepoID: 99, SettingKey: keyName, SettingValue: "Updated"}
+	err = SetSetting(updatedSetting)
+	assert.NoError(t, err)
+
+	// get all settings
+	settings, err = GetAllSettings(99)
+	assert.NoError(t, err)
+	assert.Len(t, settings, 1)
+	assert.EqualValues(t, updatedSetting.SettingValue, settings[updatedSetting.SettingKey].SettingValue)
+
+	// delete setting
+	err = DeleteSetting(99, keyName)
+	assert.NoError(t, err)
+	settings, err = GetAllSettings(99)
+	assert.NoError(t, err)
+	assert.Len(t, settings, 0)
+}