source: code/trunk/user.go@ 101

package soju

import (
        "sync"
        "time"
)

type network struct {
        Network
        user *user
        conn *upstreamConn
}

func newNetwork(user *user, record *Network) *network {
        return &network{
                Network: *record,
                user:    user,
        }
}

func (net *network) run() {
        var lastTry time.Time
        for {
                if dur := time.Now().Sub(lastTry); dur < retryConnectMinDelay {
                        delay := retryConnectMinDelay - dur
                        net.user.srv.Logger.Printf("waiting %v before trying to reconnect to %q", delay.Truncate(time.Second), net.Addr)
                        time.Sleep(delay)
                }
                lastTry = time.Now()

                uc, err := connectToUpstream(net)
                if err != nil {
                        net.user.srv.Logger.Printf("failed to connect to upstream server %q: %v", net.Addr, err)
                        continue
                }

                uc.register()

                net.user.lock.Lock()
                net.conn = uc
                net.user.lock.Unlock()

                if err := uc.readMessages(); err != nil {
                        uc.logger.Printf("failed to handle messages: %v", err)
                }
                uc.Close()

                net.user.lock.Lock()
                net.conn = nil
                net.user.lock.Unlock()
        }
}

type user struct {
        User
        srv *Server

        lock            sync.Mutex
        networks        []*network
        downstreamConns []*downstreamConn
}

func newUser(srv *Server, record *User) *user {
        return &user{
                User: *record,
                srv:  srv,
        }
}

func (u *user) forEachNetwork(f func(*network)) {
        u.lock.Lock()
        for _, network := range u.networks {
                f(network)
        }
        u.lock.Unlock()
}

func (u *user) forEachUpstream(f func(uc *upstreamConn)) {
        u.lock.Lock()
        for _, network := range u.networks {
                uc := network.conn
                if uc == nil || !uc.registered || uc.closed {
                        continue
                }
                f(uc)
        }
        u.lock.Unlock()
}

func (u *user) forEachDownstream(f func(dc *downstreamConn)) {
        u.lock.Lock()
        for _, dc := range u.downstreamConns {
                f(dc)
        }
        u.lock.Unlock()
}

func (u *user) getNetwork(name string) *network {
        for _, network := range u.networks {
                if network.Addr == name {
                        return network
                }
        }
        return nil
}

func (u *user) run() {
        networks, err := u.srv.db.ListNetworks(u.Username)
        if err != nil {
                u.srv.Logger.Printf("failed to list networks for user %q: %v", u.Username, err)
                return
        }

        u.lock.Lock()
        for _, record := range networks {
                network := newNetwork(u, &record)
                u.networks = append(u.networks, network)

                go network.run()
        }
        u.lock.Unlock()
}

func (u *user) createNetwork(addr, nick string) (*network, error) {
        network := newNetwork(u, &Network{
                Addr: addr,
                Nick: nick,
        })
        err := u.srv.db.StoreNetwork(u.Username, &network.Network)
        if err != nil {
                return nil, err
        }
        u.lock.Lock()
        u.networks = append(u.networks, network)
        u.lock.Unlock()
        go network.run()
        return network, nil
}