chore: move the go code into a subfolder

apps/api/internal/query/generic.go

@@ -0,0 +1,109 @@
+package query
+
+import (
+	"context"
+	"database/sql"
+
+	sq "github.com/Masterminds/squirrel"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/internal/database"
+	"github.com/zitadel/zitadel/internal/telemetry/tracing"
+	"github.com/zitadel/zitadel/internal/zerrors"
+)
+
+func genericRowsQuery[R any](
+	ctx context.Context,
+	client *database.DB,
+	query sq.SelectBuilder,
+	scan func(rows *sql.Rows) (R, error),
+) (resp R, err error) {
+	var rnil R
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
+
+	stmt, args, err := query.ToSql()
+	if err != nil {
+		return rnil, zerrors.ThrowInvalidArgument(err, "QUERY-05wf2q36ji", "Errors.Query.InvalidRequest")
+	}
+	err = client.QueryContext(ctx, func(rows *sql.Rows) error {
+		resp, err = scan(rows)
+		return err
+	}, stmt, args...)
+	if err != nil {
+		return rnil, zerrors.ThrowInternal(err, "QUERY-y2u7vctrha", "Errors.Internal")
+	}
+	return resp, err
+}
+
+func genericRowsQueryWithState[R Stateful](
+	ctx context.Context,
+	client *database.DB,
+	projection table,
+	query sq.SelectBuilder,
+	scan func(rows *sql.Rows) (R, error),
+) (resp R, err error) {
+	var rnil R
+	resp, err = genericRowsQuery(ctx, client, query, scan)
+	if err != nil {
+		return rnil, err
+	}
+	state, err := latestState(ctx, client, projection)
+	if err != nil {
+		return rnil, err
+	}
+	resp.SetState(state)
+	return resp, err
+}
+
+func latestState(ctx context.Context, client *database.DB, projections ...table) (state *State, err error) {
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
+
+	query, scan := prepareLatestState()
+	or := make(sq.Or, len(projections))
+	for i, projection := range projections {
+		or[i] = sq.Eq{CurrentStateColProjectionName.identifier(): projection.name}
+	}
+	stmt, args, err := query.
+		Where(or).
+		Where(sq.Eq{CurrentStateColInstanceID.identifier(): authz.GetInstance(ctx).InstanceID()}).
+		OrderBy(CurrentStateColEventDate.identifier() + " DESC").
+		ToSql()
+	if err != nil {
+		return nil, zerrors.ThrowInternal(err, "QUERY-5CfX9", "Errors.Query.SQLStatement")
+	}
+
+	err = client.QueryRowContext(ctx, func(row *sql.Row) error {
+		state, err = scan(row)
+		return err
+	}, stmt, args...)
+
+	return state, err
+}
+
+func genericRowQuery[R any](
+	ctx context.Context,
+	client *database.DB,
+	query sq.SelectBuilder,
+	scan func(row *sql.Row) (R, error),
+) (resp R, err error) {
+	var rnil R
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
+
+	stmt, args, err := query.ToSql()
+	if err != nil {
+		return rnil, zerrors.ThrowInternal(err, "QUERY-s969t763z4", "Errors.Query.SQLStatement")
+	}
+
+	err = client.QueryRowContext(ctx, func(row *sql.Row) error {
+		resp, err = scan(row)
+		return err
+	}, stmt, args...)
+	return resp, err
+}
+
+func combineToWhereStmt(query sq.SelectBuilder, toQuery func(query sq.SelectBuilder) sq.SelectBuilder, eq interface{}) sq.SelectBuilder {
+	return toQuery(query).Where(eq)
+}