/
util.go
240 lines (214 loc) · 4.36 KB
/
util.go
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package mdb
import (
"fmt"
"github.com/mabetle/mcore"
"github.com/mabetle/mcore/mmodel"
"reflect"
"strings"
)
// GetString
func GetString(value interface{}) string {
if v, ok := value.(string); ok {
return v
}
if v, ok := value.([]byte); ok {
return string(v)
}
return fmt.Sprintf("%v", value)
}
// GetSqlBeginFrom
func GetSqlBeginFrom(sql string) string {
fromIndex := strings.Index(sql, "from")
//TODO not include "from"
s := mcore.SubRight(sql, fromIndex+4)
return s
}
// TableName
func TableName(model interface{}) string {
return mmodel.GetModelTableName(model)
}
// GetTableName equals to TableName
func GetTableName(model interface{}) string {
return TableName(model)
}
// ToType
func ToType(i interface{}) (reflect.Type, error) {
t := reflect.TypeOf(i)
// If a Pointer to a type, follow
for t.Kind() == reflect.Ptr {
t = t.Elem()
}
if t.Kind() != reflect.Struct {
return nil, fmt.Errorf("Cannot SELECT into this type: %v", reflect.TypeOf(i))
}
return t, nil
}
// GetModelFields
func GetModelFields(model interface{}) string {
m := GetModelFieldsMap(model)
fields := ""
index := 0
for field := range m {
if 0 == index {
fields = field
} else {
fields = fields + "," + field
}
index++
}
return fields
}
// GetModelFieldsMap
func GetModelFieldsMap(model interface{}) map[string]string {
t := reflect.TypeOf(model)
if t.Kind() == reflect.Ptr {
t = t.Elem()
}
fs := make(map[string]string)
for i := 0; i < t.NumField(); i++ {
p := t.Field(i)
if !p.Anonymous {
field := p.Name
fs[field] = field
}
}
return fs
}
//checkError
func checkError(err error) {
if nil == err {
return
}
fmt.Println(err)
}
// PrintModels
func PrintModels(models ...interface{}) {
for _, model := range models {
PrintModel(model)
}
}
//PrintModel
func PrintModel(model interface{}) {
//FIXME should inpect model and print.
fmt.Printf("%v\n", model)
}
//
func BuildWhereQuery(sql, where string) string {
if where != "" {
where = strings.TrimSpace(where)
if !strings.HasPrefix(where, "where") {
where = " where " + where
}
sql = sql + where
}
return sql
}
func PrintData(data [][]string) {
for _, row := range data {
PrintRowData(row)
fmt.Println()
}
}
func PrintRowData(row []string) {
ncols := len(row) - 1
for icol, col := range row {
if icol == ncols {
fmt.Printf("%v", col)
} else {
fmt.Printf("%v,", col)
}
}
}
// Used for check provide table name if blank.
func IsValidTableName(table string) bool {
return !IsBlank(table, "Table name")
}
func IsValidColumnName(column string) bool {
return !IsBlank(column, "Column name")
}
func IsBlank(value interface{}, name string) bool {
v := strings.TrimSpace(fmt.Sprintf("%v", value))
if v == "" {
logger.Errorf("%s shouldnt be blank.", name)
return true
}
return false
}
func IsZero(value interface{}, name string) bool {
v := strings.TrimSpace(fmt.Sprintf("%v", value))
if v == "0" || v == "0.00" || v == "0.0" || v == "0.000" {
logger.Errorf("%s shouldnt be zero.", name)
return true
}
return false
}
func QulifyWhere(where string) string {
where = strings.TrimSpace(where)
if !strings.HasPrefix(where, "where") {
where = " where " + where
}
return where
}
// return where Column = ? and cloumnB = ?
func BuildColumnsWhere(columns []string) string {
r := " where "
for i, v := range columns {
if i == 0 {
r = r + v + " = ? "
continue
}
r = r + " and " + v + " = ? "
}
return r
}
// Return ?,?,?
func BuildValueHoder(args ...interface{}) string {
r := ""
for k, _ := range args {
if k == len(args) {
r = r + "?"
continue
}
r = r + "?,"
}
return r
}
// Join columns, return "ColumnA, ColumnB"
func BuildSelectColumns(columns []string) string {
r := ""
for k, v := range columns {
if k == len(columns) {
r = r + v
continue
}
r = r + v + ","
}
return r
}
// print the succeed message.
func CheckErrorWithSucceedMsg(err error, format string, args ...interface{}) {
if err == nil {
logger.Infof(format, args...)
}
}
// ParseSqLTableName gets table name from sql.
// from table
func ParseSqlTableName(sql string) string {
sqlA := strings.Split(sql, " ")
// no from key words
if !mcore.NewString("from").IsInArrayIgnoreCase(sqlA) {
return ""
}
table := ""
start := false
for _, v := range sqlA {
if strings.ToLower(v) == "from" {
start = true
continue
}
if start && v != "" {
table = v
}
}
return table
}