145 lines
2.4 KiB
Go
145 lines
2.4 KiB
Go
package registry
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func addNodes(old, neu []*Node) []*Node {
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nodes := make([]*Node, len(neu))
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// add all new nodes
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for i, n := range neu {
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node := *n
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nodes[i] = &node
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}
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// look at old nodes
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for _, o := range old {
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var exists bool
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// check against new nodes
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for _, n := range nodes {
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// ids match then skip
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if o.Id == n.Id {
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exists = true
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break
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}
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}
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// keep old node
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if !exists {
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node := *o
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nodes = append(nodes, &node)
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}
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}
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return nodes
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}
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func delNodes(old, del []*Node) []*Node {
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var nodes []*Node
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for _, o := range old {
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var rem bool
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for _, n := range del {
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if o.Id == n.Id {
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rem = true
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break
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}
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}
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if !rem {
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nodes = append(nodes, o)
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}
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}
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return nodes
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}
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// CopyService make a copy of service
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func CopyService(service *Service) *Service {
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// copy service
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s := new(Service)
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*s = *service
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// copy nodes
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nodes := make([]*Node, len(service.Nodes))
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for j, node := range service.Nodes {
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n := new(Node)
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*n = *node
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nodes[j] = n
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}
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s.Nodes = nodes
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// copy endpoints
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eps := make([]*Endpoint, len(service.Endpoints))
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for j, ep := range service.Endpoints {
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e := new(Endpoint)
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*e = *ep
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eps[j] = e
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}
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s.Endpoints = eps
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return s
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}
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// Copy makes a copy of services
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func Copy(current []*Service) []*Service {
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services := make([]*Service, len(current))
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for i, service := range current {
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services[i] = CopyService(service)
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}
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return services
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}
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// Merge merges two lists of services and returns a new copy
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func Merge(olist []*Service, nlist []*Service) []*Service {
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var srv []*Service
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for _, n := range nlist {
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var seen bool
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for _, o := range olist {
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if o.Version == n.Version {
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sp := new(Service)
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// make copy
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*sp = *o
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// set nodes
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sp.Nodes = addNodes(o.Nodes, n.Nodes)
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// mark as seen
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seen = true
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srv = append(srv, sp)
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break
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} else {
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sp := new(Service)
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// make copy
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*sp = *o
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srv = append(srv, sp)
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}
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}
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if !seen {
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srv = append(srv, Copy([]*Service{n})...)
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}
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}
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return srv
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}
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// Remove removes services and returns a new copy
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func Remove(old, del []*Service) []*Service {
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var services []*Service
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for _, o := range old {
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srv := new(Service)
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*srv = *o
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var rem bool
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for _, s := range del {
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if srv.Version == s.Version {
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srv.Nodes = delNodes(srv.Nodes, s.Nodes)
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if len(srv.Nodes) == 0 {
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rem = true
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}
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}
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}
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if !rem {
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services = append(services, srv)
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}
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}
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return services
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}
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