update

db/migrations/20250611010101_playqueue_current_to_index.go

@@ -0,0 +1,80 @@
+package migrations
+
+import (
+	"context"
+	"database/sql"
+	"strings"
+
+	"github.com/pressly/goose/v3"
+)
+
+func init() {
+	goose.AddMigrationContext(upPlayQueueCurrentToIndex, downPlayQueueCurrentToIndex)
+}
+
+func upPlayQueueCurrentToIndex(ctx context.Context, tx *sql.Tx) error {
+	_, err := tx.ExecContext(ctx, `
+create table playqueue_dg_tmp(
+    id varchar(255) not null,
+    user_id varchar(255) not null
+        references user(id)
+        on update cascade on delete cascade,
+    current integer not null default 0,
+    position real,
+    changed_by varchar(255),
+    items varchar(255),
+    created_at datetime,
+    updated_at datetime
+);`)
+	if err != nil {
+		return err
+	}
+
+	rows, err := tx.QueryContext(ctx, `select id, user_id, current, position, changed_by, items, created_at, updated_at from playqueue`)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	stmt, err := tx.PrepareContext(ctx, `insert into playqueue_dg_tmp(id, user_id, current, position, changed_by, items, created_at, updated_at) values(?,?,?,?,?,?,?,?)`)
+	if err != nil {
+		return err
+	}
+	defer stmt.Close()
+
+	for rows.Next() {
+		var id, userID, currentID, changedBy, items string
+		var position sql.NullFloat64
+		var createdAt, updatedAt sql.NullString
+		if err = rows.Scan(&id, &userID, &currentID, &position, &changedBy, &items, &createdAt, &updatedAt); err != nil {
+			return err
+		}
+		index := 0
+		if currentID != "" && items != "" {
+			parts := strings.Split(items, ",")
+			for i, p := range parts {
+				if p == currentID {
+					index = i
+					break
+				}
+			}
+		}
+		_, err = stmt.Exec(id, userID, index, position, changedBy, items, createdAt, updatedAt)
+		if err != nil {
+			return err
+		}
+	}
+	if err = rows.Err(); err != nil {
+		return err
+	}
+
+	if _, err = tx.ExecContext(ctx, `drop table playqueue;`); err != nil {
+		return err
+	}
+	_, err = tx.ExecContext(ctx, `alter table playqueue_dg_tmp rename to playqueue;`)
+	return err
+}
+
+func downPlayQueueCurrentToIndex(ctx context.Context, tx *sql.Tx) error {
+	return nil
+}