111 lines
2.9 KiB
Go
111 lines
2.9 KiB
Go
// Mgmt
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// Copyright (C) 2013-2018+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package engine
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import (
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"fmt"
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errwrap "github.com/pkg/errors"
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)
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// ResCopy copies a resource. This is the main entry point for copying a
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// resource since it does all the common engine-level copying as well.
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func ResCopy(r CopyableRes) (CopyableRes, error) {
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res := r.Copy()
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res.SetKind(r.Kind())
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res.SetName(r.Name())
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if x, ok := r.(MetaRes); ok {
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dst, ok := res.(MetaRes)
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if !ok {
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// programming error
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panic("meta interfaces are illogical")
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}
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dst.SetMetaParams(x.MetaParams().Copy()) // copy b/c we have it
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}
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if x, ok := r.(RefreshableRes); ok {
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dst, ok := res.(RefreshableRes)
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if !ok {
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// programming error
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panic("refresh interfaces are illogical")
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}
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dst.SetRefresh(x.Refresh()) // no need to copy atm
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}
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// copy meta params for resources with auto edges
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if x, ok := r.(EdgeableRes); ok {
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dst, ok := res.(EdgeableRes)
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if !ok {
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// programming error
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panic("autoedge interfaces are illogical")
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}
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dst.SetAutoEdgeMeta(x.AutoEdgeMeta()) // no need to copy atm
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}
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// copy meta params for resources with auto grouping
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if x, ok := r.(GroupableRes); ok {
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dst, ok := res.(GroupableRes)
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if !ok {
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// programming error
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panic("autogroup interfaces are illogical")
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}
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dst.SetAutoGroupMeta(x.AutoGroupMeta()) // no need to copy atm
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grouped := []GroupableRes{}
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for _, g := range x.GetGroup() {
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g0, ok := g.(CopyableRes)
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if !ok {
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return nil, fmt.Errorf("resource wasn't copyable")
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}
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g1, err := ResCopy(g0)
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if err != nil {
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return nil, err
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}
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g2, ok := g1.(GroupableRes)
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if !ok {
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return nil, fmt.Errorf("resource wasn't groupable")
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}
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grouped = append(grouped, g2)
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}
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dst.SetGroup(grouped)
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}
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if x, ok := r.(RecvableRes); ok {
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dst, ok := res.(RecvableRes)
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if !ok {
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// programming error
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panic("recv interfaces are illogical")
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}
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dst.SetRecv(x.Recv()) // no need to copy atm
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}
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if x, ok := r.(SendableRes); ok {
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dst, ok := res.(SendableRes)
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if !ok {
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// programming error
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panic("send interfaces are illogical")
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}
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if err := dst.Send(x.Sent()); err != nil { // no need to copy atm
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return nil, errwrap.Wrapf(err, "can't copy send")
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}
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}
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return res, nil
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}
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