161 lines
3.2 KiB
Go
161 lines
3.2 KiB
Go
/*
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Copyright 2024 Josh Deprez
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package router
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import (
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"fmt"
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"slices"
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"sort"
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"sync"
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"time"
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"github.com/sfiera/multitalk/pkg/ddp"
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)
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//const maxZoneAge = 10 * time.Minute // TODO: confirm
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type Zone struct {
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Network ddp.Network
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Name string
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LocalPort *EtherTalkPort // nil if remote (local to another router)
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LastSeen time.Time
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}
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func (z Zone) LastSeenAgo() string {
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if z.LastSeen.IsZero() {
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return "never"
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}
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return fmt.Sprintf("%v ago", time.Since(z.LastSeen).Truncate(time.Millisecond))
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}
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type zoneKey struct {
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network ddp.Network
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name string
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}
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type ZoneTable struct {
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mu sync.Mutex
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zones map[zoneKey]*Zone
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}
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func NewZoneTable() *ZoneTable {
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return &ZoneTable{
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zones: make(map[zoneKey]*Zone),
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}
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}
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func (zt *ZoneTable) Dump() []Zone {
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zt.mu.Lock()
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defer zt.mu.Unlock()
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zs := make([]Zone, 0, len(zt.zones))
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for _, z := range zt.zones {
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zs = append(zs, *z)
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}
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return zs
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}
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func (zt *ZoneTable) Upsert(network ddp.Network, name string, localPort *EtherTalkPort) {
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zt.mu.Lock()
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defer zt.mu.Unlock()
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key := zoneKey{network, name}
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z := zt.zones[key]
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if z != nil {
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z.LocalPort = localPort
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z.LastSeen = time.Now()
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return
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}
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zt.zones[key] = &Zone{
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Network: network,
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Name: name,
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LocalPort: localPort,
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LastSeen: time.Now(),
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}
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}
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func (zt *ZoneTable) Query(ns []ddp.Network) map[ddp.Network][]string {
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slices.Sort(ns)
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zs := make(map[ddp.Network][]string)
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zt.mu.Lock()
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defer zt.mu.Unlock()
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for _, z := range zt.zones {
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// if time.Since(z.LastSeen) > maxZoneAge {
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// continue
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// }
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if _, ok := slices.BinarySearch(ns, z.Network); ok {
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zs[z.Network] = append(zs[z.Network], z.Name)
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}
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}
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return zs
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}
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func (zt *ZoneTable) LookupName(name string) []*Zone {
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zt.mu.Lock()
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defer zt.mu.Unlock()
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var zs []*Zone
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for _, z := range zt.zones {
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if z.Name == name {
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zs = append(zs, z)
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}
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}
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return zs
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}
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// func (zt *ZoneTable) LocalNames() []string {
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// zt.mu.Lock()
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// seen := make(map[string]struct{})
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// zs := make([]string, 0, len(zt.zones))
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// for _, z := range zt.zones {
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// // if time.Since(z.LastSeen) > maxZoneAge {
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// // continue
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// // }
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// if z.Local != nil {
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// continue
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// }
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// if _, s := seen[z.Name]; s {
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// continue
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// }
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// seen[z.Name] = struct{}{}
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// zs = append(zs, z.Name)
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// }
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// zt.mu.Unlock()
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// sort.Strings(zs)
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// return zs
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// }
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func (zt *ZoneTable) AllNames() []string {
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zt.mu.Lock()
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seen := make(map[string]struct{})
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zs := make([]string, 0, len(zt.zones))
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for _, z := range zt.zones {
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// if time.Since(z.LastSeen) > maxZoneAge {
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// continue
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// }
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if _, s := seen[z.Name]; s {
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continue
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}
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seen[z.Name] = struct{}{}
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zs = append(zs, z.Name)
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}
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zt.mu.Unlock()
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sort.Strings(zs)
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return zs
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}
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