forked from bettercap/bettercap
/
environment.go
110 lines (84 loc) · 1.86 KB
/
environment.go
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package session
import (
"fmt"
"sort"
"strconv"
"sync"
"github.com/bettercap/bettercap/core"
)
type SetCallback func(newValue string)
type Environment struct {
sync.Mutex
Padding int `json:"-"`
Data map[string]string `json:"data"`
cbs map[string]SetCallback
sess *Session
}
func NewEnvironment(s *Session) *Environment {
env := &Environment{
Padding: 0,
Data: make(map[string]string),
sess: s,
cbs: make(map[string]SetCallback),
}
return env
}
func (env *Environment) Has(name string) bool {
env.Lock()
defer env.Unlock()
_, found := env.Data[name]
return found
}
func (env *Environment) SetCallback(name string, cb SetCallback) {
env.Lock()
defer env.Unlock()
env.cbs[name] = cb
}
func (env *Environment) WithCallback(name, value string, cb SetCallback) string {
ret := env.Set(name, value)
env.SetCallback(name, cb)
return ret
}
func (env *Environment) Set(name, value string) string {
env.Lock()
defer env.Unlock()
old, _ := env.Data[name]
env.Data[name] = value
if cb, hasCallback := env.cbs[name]; hasCallback == true {
cb(value)
}
env.sess.Events.Log(core.DEBUG, "env.change: %s -> '%s'", name, value)
width := len(name)
if width > env.Padding {
env.Padding = width
}
return old
}
func (env *Environment) Get(name string) (bool, string) {
env.Lock()
defer env.Unlock()
if value, found := env.Data[name]; found == true {
return true, value
}
return false, ""
}
func (env *Environment) GetInt(name string) (error, int) {
if found, value := env.Get(name); found == true {
if i, err := strconv.Atoi(value); err == nil {
return nil, i
} else {
return err, 0
}
}
return fmt.Errorf("Not found."), 0
}
func (env *Environment) Sorted() []string {
env.Lock()
defer env.Unlock()
var keys []string
for k := range env.Data {
keys = append(keys, k)
}
sort.Strings(keys)
return keys
}