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package schedule
import (
"context"
"database/sql"
"encoding/json"
"github.com/google/uuid"
"github.com/target/goalert/gadb"
"github.com/target/goalert/util/jsonutil"
"github.com/target/goalert/util/sqlutil"
)
func (store *Store) scheduleData(ctx context.Context, tx *sql.Tx, scheduleID uuid.UUID) (*Data, error) {
db := gadb.New(store.db)
if tx != nil {
db = db.WithTx(tx)
}
rawData, err := db.SchedFindData(ctx, scheduleID)
if err == sql.ErrNoRows {
err = nil
}
if err != nil {
return nil, err
}
var data Data
if len(rawData) > 0 {
err = json.Unmarshal(rawData, &data)
if err != nil {
return nil, err
}
}
return &data, nil
}
func (store *Store) updateScheduleData(ctx context.Context, tx *sql.Tx, scheduleID uuid.UUID, apply func(data *Data) error) error {
var err error
externalTx := tx != nil
if !externalTx {
tx, err = store.db.BeginTx(ctx, nil)
if err != nil {
return err
}
defer sqlutil.Rollback(ctx, "schedule: update data", tx)
}
db := gadb.New(store.db).WithTx(tx)
var rawData json.RawMessage
// Select for update, if it does not exist try inserting, if that fails due to a race, re-try select for update
rawData, err = db.SchedFindDataForUpdate(ctx, scheduleID)
if err == sql.ErrNoRows {
err = db.SchedInsertData(ctx, scheduleID)
if isDataPkeyConflict(err) {
// insert happened after orig. select for update and our subsequent insert, re-try select for update
rawData, err = db.SchedFindDataForUpdate(ctx, scheduleID)
}
}
if err != nil {
return err
}
var data Data
if len(rawData) > 0 {
err = json.Unmarshal(rawData, &data)
if err != nil {
return err
}
}
err = apply(&data)
if err != nil {
return err
}
// preserve unknown fields
rawData, err = jsonutil.Apply(rawData, data)
if err != nil {
return err
}
err = db.SchedUpdateData(ctx, gadb.SchedUpdateDataParams{
ScheduleID: scheduleID,
Data: rawData,
})
if err != nil {
return err
}
if !externalTx {
return tx.Commit()
}
return nil
}
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