tables_utility.go
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package restutility
import (
"encoding/json"
"errors"
"gopkg.in/rana/ora.v3"
"io"
"io/ioutil"
"fmt"
)
type TableConfig struct {
Tables []Table
}
type Table struct {
TableType string `json:"tableType"`
Translations []TableTranslation `json:"translations"`
TableFields []Field `json:"tableFields"`
Correlations []CorrelationField `json:"correlationFields"`
IdField string `json:"idField"`
}
type CorrelationField struct {
Result string `json:"result"`
Elements []string `json:"elements"`
Type string `json:"type"`
}
type TableTranslation struct {
Language string `json:"language"`
FieldsLabels map[string]string `json:"fieldsLabels"`
}
func (tl TableConfig) LoadTranslations(tableType string) LangMap {
translations := make(LangMap, 0)
for _, table := range tl.Tables {
if tableType == table.TableType {
for _, t := range table.Translations {
translations[t.Language] = t.FieldsLabels
}
}
}
return translations
}
func (tl TableConfig) LoadFields(tableType string) []Field {
fields := make([]Field, 0)
for _, table := range tl.Tables {
if tableType == table.TableType {
for _, f := range table.TableFields {
fields = append(fields, f)
}
}
}
return fields
}
func (tl TableConfig) LoadIdField(tableType string) string {
for _, table := range tl.Tables {
if tableType == table.TableType {
return table.IdField
}
}
return ""
}
func (tl TableConfig) LoadCorrelations(tableType string) []CorrelationField {
resp := make([]CorrelationField, 0)
for _, table := range tl.Tables {
if tableType == table.TableType {
for _, f := range table.Correlations {
resp = append(resp, f)
}
}
}
return resp
}
var _tables TableConfig
var _prevProject string
func InitTables(db *ora.Ses, project string) error {
jsonbuf, _ := fetchTablesConfig(db, EqualQuotes(project))
json.Unmarshal(jsonbuf, &_tables.Tables)
if len(_tables.Tables) == 0 {
return errors.New("tables config is corrupt")
}
return nil
}
func fetchTablesConfig(db *ora.Ses, project string) ([]byte, error) {
stmt, err := db.Prep(`SELECT
JSON_CLOB
FROM TABLES_CONFIG
WHERE PROJEKAT` + project, ora.S)
defer stmt.Close()
if err != nil {
return nil, err
}
rset, err := stmt.Qry()
if err != nil {
return nil, err
}
bytes := make([]byte, 0)
if rset.Next() {
lob := rset.Row[0].(io.Reader)
bytes, err = ioutil.ReadAll(lob)
if err != nil {
fmt.Printf("mega error: %v\n", err)
}
}
return bytes, nil
}
func loadTable(table string) JSONParams {
return NewJSONParams(_tables.LoadTranslations(table),
_tables.LoadFields(table),
_tables.LoadIdField(table),
_tables.LoadCorrelations(table))
}