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package datamaps
import (
"database/sql"
"log"
"path/filepath"
"github.com/tealeg/xlsx/v3"
// Needed for the sqlite3 driver
_ "github.com/mattn/go-sqlite3"
)
func ExportMaster(opts *Options) error {
// A master represents a set of file data from the database. Actually, in terms of the database,
// it should represent a "return".
//
// The meat of the master is of the format:
// Key 1 | Key_1_Value_for_FD_1 | Key_1_Value_for_FD_2 | Key_1_Value_for_FD_3 | ... etc
// Key 2 | Key_2_Value_for_FD_1 | Key_2_Value_for_FD_2 | Key_2_Value_for_FD_3 | ... etc
// Key 3 | Key_3_Value_for_FD_1 | Key_3_Value_for_FD_2 | Key_3_Value_for_FD_3 | ... etc
// ...
// Could be represented as a slice or a map[string][]string
// SQL statement:
//
// SELECT datamap_line.key, return_data.value, return_data.filename
// FROM (((return_data
// INNER JOIN datamap_line ON return_data.dml_id=datamap_line.id)
// INNER JOIN datamap ON datamap_line.dm_id=datamap.id)
// INNER JOIN return on return_data.ret_id=return.id)
// WHERE datamap.name="Tonk 1" AND return.name="Hunkers";
// filename := filepath.Join(opts.MasterOutPutPath, "master.xlsx")
// a test key
targetKey := "A Rabbit"
wb := xlsx.NewFile()
sh, err := wb.AddSheet("Master Data")
testRow, err := sh.Row(1)
if err != nil {
log.Fatal(err)
}
// SQLITE CODE
db, err := sql.Open("sqlite3", opts.DBPath)
sqlCount := `SELECT count(return_data.id)
FROM (((return_data
INNER JOIN datamap_line ON return_data.dml_id=datamap_line.id)
INNER JOIN datamap ON datamap_line.dm_id=datamap.id)
INNER JOIN return on return_data.ret_id=return.id)
WHERE datamap.name=? AND return.name=? AND datamap_line.key=?
GROUP BY datamap_line.key;`
var rowCount int64
rowCountRes := db.QueryRow(sqlCount, opts.DMName, opts.ReturnName, targetKey)
if err != nil {
return err
}
if err := rowCountRes.Scan(&rowCount); err != nil {
return err
}
getDataSQL := `SELECT datamap_line.key, return_data.value, return_data.filename
FROM (((return_data
INNER JOIN datamap_line ON return_data.dml_id=datamap_line.id)
INNER JOIN datamap ON datamap_line.dm_id=datamap.id)
INNER JOIN return on return_data.ret_id=return.id)
WHERE datamap.name=? AND return.name=? AND datamap_line.key=?;`
if sl := testRow.WriteSlice([]string{"Hello", "Bollocks", "Knackers", "Bottyies"}, -1); sl == -1 {
log.Printf("not a slice type")
}
log.Printf("writing slice to row\n")
log.Printf("saving master at %s", opts.MasterOutPutPath)
if err := wb.Save(filepath.Join(opts.MasterOutPutPath, "master.xlsx")); err != nil {
log.Fatalf("cannot save file to %s", opts.MasterOutPutPath)
}
sh.Close()
return nil
}
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