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activities.go
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activities.go
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package model
import (
"sync"
)
// Activities represents activities
type Activities struct {
mux *sync.RWMutex
activities []*Activity
Activity *Activity
}
func (a *Activities) Len() int {
return len(a.activities)
}
// Push add activity
func (a *Activities) Push(activity *Activity) {
a.mux.Lock()
defer a.mux.Unlock()
a.activities = append(a.activities, activity)
a.Activity = activity
}
// Range iterates over all activities
func (a *Activities) Range(handler func(activity *Activity) bool, reverse bool) {
a.mux.Lock()
activities := a.activities
a.mux.Unlock()
if reverse {
for i := len(activities) - 1; i >= 0; i-- {
if !handler(activities[i]) {
return
}
}
return
}
for _, activity := range activities {
if !handler(activity) {
return
}
}
}
// Pop removes last activity
func (a *Activities) Pop() *Activity {
a.mux.Lock()
defer a.mux.Unlock()
var result *Activity
if len(a.activities) > 0 {
result = a.activities[len(a.activities)-1]
a.activities = a.activities[:len(a.activities)-1]
}
if len(a.activities) > 0 {
a.Activity = a.activities[len(a.activities)-1]
}
return result
}
// Get returns activity for index
func (a *Activities) Get(index int) *Activity {
return a.activities[index]
}
func (a *Activities) Last() *Activity {
if a.Activity == nil {
a.Activity = &Activity{
MetaTag: &MetaTag{Tag: "main"},
}
}
return a.Activity
}
func (a *Activities) First() *Activity {
if a.Len() > 0 {
return a.activities[0]
}
return a.Activity
}
// NewActivities creates a new activites
func NewActivities() *Activities {
return &Activities{
mux: &sync.RWMutex{},
activities: make([]*Activity, 0),
}
}