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list_trackers.go
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list_trackers.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package engine
import (
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol"
)
// TrackerList is an engine to get a list of user's trackers
// (other users tracking this user).
type ListTrackersEngine struct {
uid keybase1.UID
username string
trackers *libkb.Trackers
libkb.Contextified
}
// NewListTrackers creates a TrackerList engine for uid.
func NewListTrackers(uid keybase1.UID, g *libkb.GlobalContext) *ListTrackersEngine {
return &ListTrackersEngine{
uid: uid,
Contextified: libkb.NewContextified(g),
}
}
// NewListTrackersByName creates a TrackerList engine that will
// do a lookup by username.
func NewListTrackersByName(username string) *ListTrackersEngine {
return &ListTrackersEngine{username: username}
}
func NewListTrackersSelf() *ListTrackersEngine {
return &ListTrackersEngine{}
}
// Name is the unique engine name.
func (e *ListTrackersEngine) Name() string {
return "ListTrackersEngine"
}
// GetPrereqs returns the engine prereqs (none).
func (e *ListTrackersEngine) Prereqs() Prereqs {
session := false
if e.uid.IsNil() && len(e.username) == 0 {
session = true
}
return Prereqs{Session: session}
}
// RequiredUIs returns the required UIs.
func (e *ListTrackersEngine) RequiredUIs() []libkb.UIKind {
return []libkb.UIKind{libkb.LogUIKind}
}
// SubConsumers returns the other UI consumers for this engine.
func (e *ListTrackersEngine) SubConsumers() []libkb.UIConsumer {
return nil
}
// Run starts the engine.
func (e *ListTrackersEngine) Run(ctx *Context) error {
if err := e.ensureUID(); err != nil {
return err
}
ts := libkb.NewTrackerSyncer(e.uid, e.G())
var err error
aerr := e.G().LoginState().Account(func(a *libkb.Account) {
err = libkb.RunSyncer(ts, e.uid, a.LoggedIn(), a.LocalSession())
}, "ListTrackersEngine - Run")
if aerr != nil {
return aerr
}
if err != nil {
return err
}
e.trackers = ts.Trackers()
return nil
}
// List returns the array of trackers for this user.
func (e *ListTrackersEngine) List() []libkb.Tracker {
if e.trackers == nil {
return []libkb.Tracker{}
}
return e.trackers.Trackers
}
func (e *ListTrackersEngine) ExportedList() (ret []keybase1.Tracker) {
for _, el := range e.List() {
ret = append(ret, el.Export())
}
return
}
func (e *ListTrackersEngine) ensureUID() error {
if e.uid.Exists() {
return nil
}
if len(e.username) == 0 {
e.uid = e.G().GetMyUID()
return nil
}
user, err := libkb.LoadUser(libkb.NewLoadUserByNameArg(e.G(), e.username))
if err != nil {
return err
}
e.uid = user.GetUID()
return nil
}