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// SPDX-FileCopyrightText: 2026 Stefan Majewsky <majewsky@gmx.net>
// SPDX-License-Identifier: Apache-2.0
package oblast
import (
"errors"
"fmt"
"reflect"
)
// Insert executes an SQL INSERT statement for each of the provided records.
//
// Fields that are declared with the "auto" tag will not be written into the DB,
// and instead their value (as auto-generated by the DB on insert) will be placed in the record.
//
// Returns an error if [NewStore] was called without the [TableNameIs] option, which is required to generate a query for this method.
func (s Store[R]) Insert(db Handle, records ...*R) (returnedError error) {
// NOTE: This function body should be as short as possible to reduce the binary size after monomorphization.
// Any expression that does not depend on type R should be factored out into a reusable function.
// TODO: minimize
if s.plan.Insert.Query == "" {
return errors.New("cannot execute Insert() because query could not be autogenerated")
}
var (
argumentIndexes = s.plan.Insert.ArgumentIndexes
argumentSlots = make([]any, len(argumentIndexes))
scanIndexes = s.plan.Insert.ScanIndexes
scanSlots []any
)
if len(scanIndexes) > 0 {
scanSlots = make([]any, len(scanIndexes))
}
stmt, err := db.Prepare(s.plan.Insert.Query)
if err != nil {
return fmt.Errorf("during Prepare(): %w", err)
}
defer func() {
returnedError = mergeCloseError("Stmt", returnedError, stmt.Close())
}()
for idx, r := range records {
v := reflect.ValueOf(r).Elem()
for idx, index := range argumentIndexes {
argumentSlots[idx] = v.FieldByIndex(index).Addr().Interface()
}
if s.dialect.UsesLastInsertID() {
result, err := stmt.Exec(argumentSlots...)
if err != nil {
return fmt.Errorf("during Exec() for record with idx = %d: %w", idx, err)
}
id, err := result.LastInsertId()
if err != nil {
return fmt.Errorf("during LastInsertId() for record with idx = %d: %w", idx, err)
}
if s.plan.FillIDWithSetInt {
v.FieldByIndex(scanIndexes[0]).SetInt(id)
} else if s.plan.FillIDWithSetUint {
if id < 0 {
return fmt.Errorf("LastInsertId() = %d for record with idx = %d cannot be converted to uint", id, idx)
}
v.FieldByIndex(scanIndexes[0]).SetUint(uint64(id))
}
} else {
for idx, index := range scanIndexes {
scanSlots[idx] = v.FieldByIndex(index).Addr().Interface()
}
err := stmt.QueryRow(argumentSlots...).Scan(scanSlots...)
if err != nil {
return fmt.Errorf("during QueryRow() for record with idx = %d: %w", idx, err)
}
}
}
return nil
}
// TODO: update
// Delete executes an SQL DELETE statement for each of the provided records, using their primary keys to locate the respective table rows.
//
// Returns an error if [NewStore] was called without the [TableNameIs] or [PrimaryKeyIs] options, which are both required to generate a query for this method.
func (s Store[R]) Delete(db Handle, records ...R) (returnedError error) {
// NOTE: This function body should be as short as possible to reduce the binary size after monomorphization.
// Any expression that does not depend on type R should be factored out into a reusable function.
// TODO: minimize
if s.plan.Delete.Query == "" {
return errors.New("cannot execute Delete() because query could not be autogenerated")
}
var (
argumentIndexes = s.plan.Delete.ArgumentIndexes
argumentSlots = make([]any, len(argumentIndexes))
)
stmt, err := db.Prepare(s.plan.Delete.Query)
if err != nil {
return fmt.Errorf("during Prepare(): %w", err)
}
defer func() {
returnedError = mergeCloseError("Stmt", returnedError, stmt.Close())
}()
for idx, r := range records {
v := reflect.ValueOf(&r).Elem()
for idx, index := range argumentIndexes {
argumentSlots[idx] = v.FieldByIndex(index).Addr().Interface()
}
_, err := stmt.Exec(argumentSlots...)
if err != nil {
return fmt.Errorf("during Exec() for record with idx = %d: %w", idx, err)
}
}
return nil
}
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