feat(mysql): Add list DBs functionality

cmd/cmd.go

@@ -4,6 +4,7 @@ import (
 	_ "github.com/sikalabs/slut/cmd/mysql"
 	_ "github.com/sikalabs/slut/cmd/mysql/create"
 	_ "github.com/sikalabs/slut/cmd/mysql/drop"
+	_ "github.com/sikalabs/slut/cmd/mysql/list"
 	_ "github.com/sikalabs/slut/cmd/postgres"
 	_ "github.com/sikalabs/slut/cmd/postgres/create"
 	_ "github.com/sikalabs/slut/cmd/postgres/drop"

cmd/mysql/list/list.go

@@ -0,0 +1,36 @@
+package drop
+
+import (
+	mysqlcmd "github.com/sikalabs/slut/cmd/mysql"
+	rootcmd "github.com/sikalabs/slut/cmd/root"
+	"github.com/sikalabs/slut/utils/mysql"
+
+	"github.com/spf13/cobra"
+)
+
+var MysqlListCmd = &cobra.Command{
+	Use:   "list",
+	Short: "list Mysql databases",
+	Args:  cobra.NoArgs,
+	Run: func(c *cobra.Command, args []string) {
+		if rootcmd.RootCmdFlagJson {
+			mysql.ListJSON(
+				mysqlcmd.MysqlCmdFlagHost,
+				mysqlcmd.MysqlCmdFlagPort,
+				mysqlcmd.MysqlCmdFlagUser,
+				mysqlcmd.MysqlCmdFlagPassword,
+			)
+		} else {
+			mysql.ListText(
+				mysqlcmd.MysqlCmdFlagHost,
+				mysqlcmd.MysqlCmdFlagPort,
+				mysqlcmd.MysqlCmdFlagUser,
+				mysqlcmd.MysqlCmdFlagPassword,
+			)
+		}
+	},
+}
+
+func init() {
+	mysqlcmd.MysqlCmd.AddCommand(MysqlListCmd)
+}

utils/mysql/list.go

@@ -0,0 +1,76 @@
+package mysql
+
+import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"strconv"
+)
+
+func List(
+	host string,
+	port int,
+	user string,
+	password string,
+) ([]string, error) {
+	db, err := sql.Open(
+		"mysql",
+		user+":"+password+"@tcp("+host+":"+strconv.Itoa(port)+")/")
+	if err != nil {
+		panic(err)
+	}
+	if err != nil {
+		return nil, err
+	}
+	defer db.Close()
+
+	rows, err := db.Query("SHOW DATABASES;")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var dbNames []string
+	var dbName string
+
+	for rows.Next() {
+		err := rows.Scan(&dbName)
+		if err != nil {
+			return nil, err
+		}
+		dbNames = append(dbNames, dbName)
+	}
+	return dbNames, err
+}
+
+func ListText(
+	host string,
+	port int,
+	user string,
+	password string,
+) {
+	dbNames, err := List(host, port, user, password)
+	if err != nil {
+		panic(err)
+	}
+	for _, dbName := range dbNames {
+		fmt.Println(dbName)
+	}
+}
+
+func ListJSON(
+	host string,
+	port int,
+	user string,
+	password string,
+) {
+	dbNames, err := List(host, port, user, password)
+	if err != nil {
+		panic(err)
+	}
+	outJson, err := json.Marshal(dbNames)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(string(outJson))
+}