/
util.go
126 lines (120 loc) · 2.53 KB
/
util.go
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package valid
import (
"database/sql"
"fmt"
"io"
"mime/multipart"
"strings"
// import github.com/go-sql-driver/mysql
_ "github.com/go-sql-driver/mysql"
// import github.com/lib/pq
_ "github.com/lib/pq"
)
func getRuleAndMsg(r string) (rule, customMsg string) {
if strings.Contains(r, ">") {
rcm := strings.SplitN(r, ">", 2)
rule = rcm[0]
customMsg = rcm[1]
} else {
rule = r
}
return
}
func formatFieldName(field string) string {
var text string
for i := 0; i < len(field); i++ {
c := string([]byte{field[i]})
if c == strings.ToUpper(c) {
if len(text) != 0 {
text += " "
}
text += strings.ToLower(c)
} else {
text += strings.ToLower(c)
}
}
return text
}
func readFile(fh *multipart.FileHeader) ([]byte, error) {
file, err := fh.Open()
if err != nil {
return nil, err
}
buffer, _ := io.ReadAll(file)
return buffer, nil
}
func prepareMimes(mimes string) []string {
buffer := make([]string, 0, len(mimes))
for _, m := range strings.Split(mimes, ",") {
buffer = append(buffer, "."+m)
}
return buffer
}
func snakeCase(camel string) (snake string) {
var b strings.Builder
diff := 'a' - 'A'
l := len(camel)
for i, v := range camel {
// A is 65, a is 97
if v >= 'a' {
b.WriteRune(v)
continue
}
if (i != 0 || i == l-1) && ((i > 0 && rune(camel[i-1]) >= 'a') || (i < l-1 && rune(camel[i+1]) >= 'a')) {
b.WriteRune('_')
}
b.WriteRune(v + diff)
}
return b.String()
}
// Database configuration
type Database struct {
Host string
Port int
Name string
Username string
Password string
Driver string
SSLMode string
}
func connectDB(config *Database) *sql.DB {
switch config.Driver {
case DriverPostgres:
var SSLMode string
if config.SSLMode != "" {
SSLMode = config.SSLMode
} else {
SSLMode = "disable"
}
dsn := fmt.Sprintf(
"host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
config.Host,
config.Port,
config.Username,
config.Name,
config.Password,
SSLMode,
)
db, err := sql.Open(config.Driver, dsn)
if err != nil {
panic(fmt.Sprintf("[db connection error] %v", err))
}
return db
case DriverMysql:
dsn := fmt.Sprintf(
"%s:%s@tcp(%s:%d)/%s",
config.Username,
config.Password,
config.Host,
config.Port,
config.Name,
)
db, err := sql.Open(config.Driver, dsn)
if err != nil {
panic(fmt.Sprintf("[db connection error] %v", err))
}
return db
default:
panic(fmt.Sprintf("[db connection error]: provide db driver. validata currently support %s and %s drivers.", DriverMysql, DriverPostgres))
}
}