Move db and services to pkg

pkg/database/database.go

@@ -0,0 +1,72 @@
+package database
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	"github.com/dustinpianalto/geeksbot/pkg/database/migrations"
+	"github.com/golang-migrate/migrate/v4"
+	"github.com/golang-migrate/migrate/v4/database/postgres"
+	bindata "github.com/golang-migrate/migrate/v4/source/go_bindata"
+)
+
+var (
+	db             *sql.DB
+	GuildService   guildService
+	UserService    userService
+	ChannelService channelService
+	MessageService messageService
+	RequestService requestService
+	PatreonService patreonService
+	ServerService  serverService
+)
+
+func ConnectDatabase(dbConnString string) {
+	s := bindata.Resource(migrations.AssetNames(),
+		func(name string) ([]byte, error) {
+			return migrations.Asset(name)
+		})
+	var err error
+	db, err = sql.Open("postgres", dbConnString)
+	if err != nil {
+		log.Fatal(fmt.Errorf("Can't connect to the database: %w", err))
+	}
+	log.Println("Database Connected.")
+	db.SetMaxOpenConns(75)
+	db.SetMaxIdleConns(5)
+	db.SetConnMaxLifetime(300)
+	d, err := bindata.WithInstance(s)
+	if err != nil {
+		log.Fatal(fmt.Errorf("cannot load migrations: %w", err))
+	}
+	instance, err := postgres.WithInstance(db, &postgres.Config{})
+	if err != nil {
+		log.Fatal(fmt.Errorf("cannot create db driver: %w", err))
+	}
+	m, err := migrate.NewWithInstance("go-bindatafoo", d, "postgres", instance)
+	if err != nil {
+		log.Fatal(fmt.Errorf("cannot create migration instance: %w", err))
+	}
+	err = m.Up()
+	if err != nil {
+		if err.Error() == "no change" {
+			log.Println(err)
+		} else {
+			log.Fatal(err)
+		}
+	}
+	log.Println("Migrations Run")
+	initServices()
+	log.Println("Services Initialized")
+}
+
+func initServices() {
+	GuildService = guildService{db: db}
+	UserService = userService{db: db}
+	ChannelService = channelService{db: db}
+	MessageService = messageService{db: db}
+	PatreonService = patreonService{db: db}
+	RequestService = requestService{db: db}
+	ServerService = serverService{db: db}
+}