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96 lines
2.5 KiB
96 lines
2.5 KiB
package admin
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import (
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"reflect"
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"fmt"
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"zedshaw.games/webapp/data"
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_ "github.com/mattn/go-sqlite3"
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sq "github.com/Masterminds/squirrel"
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)
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func SelectTable(table string, the_type reflect.Type, limit uint64, offset uint64) ([]reflect.Value, error) {
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var results []reflect.Value
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sql_query, args, err := sq.Select("*").Limit(limit).Offset(offset).From(table).ToSql()
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if err != nil { return results, err }
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rows, err := data.DB.Queryx(sql_query, args...)
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if err != nil { return results, err }
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defer rows.Close()
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for rows.Next() {
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the_data := reflect.New(the_type)
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err = rows.StructScan(the_data.Interface())
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if err != nil { return results, err }
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results = append(results, the_data.Elem())
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}
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return results, rows.Err()
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}
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func Get(table string, the_type reflect.Type, id int64) (reflect.Value, error) {
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sql_query, args, err := sq.Select("*").From(table).Where(sq.Eq{"id": id}).ToSql()
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if err != nil { return reflect.New(nil), err }
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the_data := reflect.New(the_type)
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err = data.DB.Get(the_data.Interface(), sql_query, args...)
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// BUG: not sure if Elem or returning the reflect.New is better
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return the_data.Elem(), err
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}
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func Delete(table string, id int64) error {
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sql_query, args, err := sq.Delete(table).Where(sq.Eq{"id": id}).ToSql()
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if err != nil { return err }
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_, err = data.DB.Exec(sql_query, args...)
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return err
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}
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func Insert(table string, value reflect.Value) error {
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type_of := value.Type()
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field_num := value.NumField()
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var columns []string
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var values []interface{}
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for i := 0; i < field_num; i++ {
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field := value.Field(i)
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tag := type_of.Field(i).Tag.Get("db")
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if tag == "id" { continue }
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columns = append(columns, tag)
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values = append(values, field.Interface())
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}
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builder := sq.Insert(table).Columns(columns...).Values(values...)
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sql_query, args, err := builder.ToSql()
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_, err = data.DB.Exec(sql_query, args...)
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return err
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}
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func Update(table string, value reflect.Value) error {
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builder := sq.Update(table)
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type_of := value.Type()
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field_num := value.NumField()
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for i := 0; i < field_num; i++ {
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field := value.Field(i)
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tag := type_of.Field(i).Tag.Get("db")
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// skip update of id to avoid replacing it
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if tag == "id" { continue }
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builder = builder.Set(tag, field.Interface())
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}
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builder.Where(sq.Eq{"id": value.FieldByName("Id").Interface()})
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sql_query, args, err := builder.ToSql()
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fmt.Println("UPDATE QUERY", sql_query, args)
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if err != nil { return err}
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_, err = data.DB.Exec(sql_query, args...)
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return err
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}
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