Feature flags (WIP)

api/account/common.go

@@ -37,6 +37,11 @@ const (
 
 	UUIDSize  = 16
 	TokenSize = 32
+
+	// feature access groups
+	DEV_STAFF   = "DEV_STAFF"
+	CONTRIBUTOR = "CONTRIBUTOR"
+	EVERYONE    = "EVERYONE"
 )
 
 var (

api/account/discord.go

@@ -106,3 +106,19 @@ func RetrieveDiscordId(code string) (string, error) {
 
 	return user.Id, nil
 }
+
+// TODO: fetch these instead of hardcoding them
+var devsAndStaff = map[string]bool{}
+var contributors = map[string]bool{}
+
+func GetAccessGroupByDiscordRole(discordId string) (group string) {
+	if devsAndStaff[discordId] {
+		return DEV_STAFF
+	}
+
+	if contributors[discordId] {
+		return CONTRIBUTOR
+	}
+
+	return ""
+}

api/account/info.go

@@ -22,20 +22,54 @@ import (
 )
 
 type InfoResponse struct {
-	Username        string `json:"username"`
-	DiscordId       string `json:"discordId"`
-	GoogleId        string `json:"googleId"`
-	LastSessionSlot int    `json:"lastSessionSlot"`
+	Username        string   `json:"username"`
+	DiscordId       string   `json:"discordId"`
+	GoogleId        string   `json:"googleId"`
+	LastSessionSlot int      `json:"lastSessionSlot"`
+	FeatureFlags    []string `json:"featureFlags"`
 }
 
 // /account/info - get account info
 func Info(username string, discordId string, googleId string, uuid []byte) (InfoResponse, error) {
 	slot, _ := db.GetLatestSessionSaveDataSlot(uuid)
+	featureFlags := getFeatureFlags(discordId)
 	response := InfoResponse{
 		Username:        username,
 		LastSessionSlot: slot,
 		DiscordId:       discordId,
 		GoogleId:        googleId,
+		FeatureFlags:    featureFlags,
 	}
 	return response, nil
 }
+
+func getFeatureFlags(discordId string) []string {
+	var flags []string
+
+	enabledFlags, err := db.GetEnabledFeatureFlags()
+	if err != nil {
+		return flags
+	}
+
+	for _, flag := range enabledFlags {
+		var hasAccess = false
+
+		if flag.AccessLevel == EVERYONE {
+			hasAccess = true
+		} else {
+			accessGroup := GetAccessGroupByDiscordRole(discordId)
+
+			if flag.AccessLevel == DEV_STAFF {
+				hasAccess = accessGroup == DEV_STAFF
+			} else if flag.AccessLevel == CONTRIBUTOR {
+				hasAccess = accessGroup == CONTRIBUTOR || accessGroup == DEV_STAFF
+			}
+		}
+
+		if hasAccess {
+			flags = append(flags, flag.Name)
+		}
+	}
+
+	return flags
+}

db/db.go

@@ -103,6 +103,10 @@ func setupDb(tx *sql.Tx) error {
 
 		`ALTER TABLE accounts ADD COLUMN IF NOT EXISTS discordId VARCHAR(32) UNIQUE DEFAULT NULL`,
 		`ALTER TABLE accounts ADD COLUMN IF NOT EXISTS googleId VARCHAR(32) UNIQUE DEFAULT NULL`,
+
+		// ----------------------------------
+		// MIGRATION 004
+		`CREATE TABLE IF NOT EXISTS featureFlags (id INT(11) NOT NULL AUTO_INCREMENT PRIMARY KEY, name VARCHAR(64) UNIQUE NOT NULL, accessLevel VARCHAR(16), CONSTRAINT chk_featureFlags_accessLevel CHECK(accessLevel IN ('DEV_STAFF', 'CONTRIBUTOR', 'EVERYONE')))`,
 	}
 
 	for _, q := range queries {

db/featureflags.go

@@ -0,0 +1,48 @@
+/*
+	Copyright (C) 2024  Pagefault Games
+
+	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 (
+	"github.com/pagefaultgames/rogueserver/defs"
+)
+
+func GetEnabledFeatureFlags() ([]defs.FeatureFlag, error) {
+	var activeFlags []defs.FeatureFlag
+
+	results, err := handle.Query("SELECT name, accessLevel FROM featureFlags WHERE enabled = 1")
+
+	if err != nil {
+		return activeFlags, err
+	}
+
+	defer results.Close()
+
+	for results.Next() {
+		var flag defs.FeatureFlag
+
+		err = results.Scan(&flag.Name, &flag.AccessLevel)
+
+		if err != nil {
+			return activeFlags, err
+		}
+
+		activeFlags = append(activeFlags, flag)
+	}
+
+	return activeFlags, nil
+}

defs/featureflags.go

@@ -0,0 +1,23 @@
+/*
+	Copyright (C) 2024  Pagefault Games
+
+	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 defs
+
+type FeatureFlag struct {
+	Name        string
+	AccessLevel string // DEV_STAFF | CONTRIBUTOR | EVERYONE
+}