70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
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package populatedb
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import (
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"database/sql"
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"errors"
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"fmt"
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"net/url"
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"time"
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"github.com/go-sql-driver/mysql"
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tblsconfig "github.com/k1LoW/tbls/config"
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tblsdatasource "github.com/k1LoW/tbls/datasource"
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tblsschema "github.com/k1LoW/tbls/schema"
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)
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const (
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dialectMySQL = "mysql"
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)
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var ErrDialectNotSupport = errors.New("dialect not support ")
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type Populator interface{}
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type populator struct {
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db *sql.DB
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tblsSchema *tblsschema.Schema
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}
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func NewPopulator(dbDialect, dbURL string) (Populator, error) {
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if dbDialect != dialectMySQL {
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return nil, fmt.Errorf("not support [%s]: %w", dbDialect, ErrDialectNotSupport)
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}
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// https://go.dev/doc/tutorial/database-access
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mysqlCfg, err := mysql.ParseDSN(dbURL)
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if err != nil {
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return nil, fmt.Errorf("mysql: failed to parse dsn [%s]: %w", dbURL, err)
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}
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// https://github.com/go-sql-driver/mysql#timetime-support
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mysqlCfg.ParseTime = true
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mysqlCfg.AllowNativePasswords = true
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mysqlCfg.Loc = time.UTC
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mysqlURL := mysqlCfg.FormatDSN()
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db, err := sql.Open(dbDialect, mysqlURL)
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if err != nil {
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return nil, fmt.Errorf("sql: failed to open [%s]: %w", mysqlURL, err)
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}
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if err := db.Ping(); err != nil {
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return nil, fmt.Errorf("database: failed to ping [%s] : %w", mysqlURL, err)
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}
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// https://github.com/k1LoW/tbls
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// https://stackoverflow.com/q/48671938
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tblsURL := "mysql://" + mysqlCfg.User + ":" + url.QueryEscape(mysqlCfg.Passwd) + "@" + mysqlCfg.Addr + "/" + mysqlCfg.DBName
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tblsSchema, err := tblsdatasource.Analyze(tblsconfig.DSN{
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URL: tblsURL,
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})
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if err != nil {
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return nil, fmt.Errorf("tbls: faield to analyze [%s]: %w", tblsURL, err)
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}
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return &populator{
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db: db,
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tblsSchema: tblsSchema,
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}, nil
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}
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