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data.go
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data.go
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package data
import (
"os"
"github.com/nerney/serverless-rest-golang/models"
"github.com/patrickmn/go-cache"
)
type datastore struct {
*cache.Cache
Altered bool
}
var c datastore
func init() {
c = datastore{cache.New(cache.NoExpiration, cache.NoExpiration), false}
// throw a couple things in a cache for testing
if os.Getenv("TESTING") != "" {
c.SetDefault("1", models.Item{ID: "1", Data: "one"})
c.SetDefault("2", models.Item{ID: "2", Data: "two"})
return
}
}
// ExportIfAltered returns an altered cache, or nil if unaltered
func ExportIfAltered() []models.Item {
if c.Altered {
c.Altered = false
return GetAll()
}
return nil
}
// GetAll items from the data cache.
func GetAll() []models.Item {
items := []models.Item{}
for _, item := range c.Items() {
items = append(items, item.Object.(models.Item))
}
return items
}
// GetOne item by id from the data cache.
func GetOne(id string) *models.Item {
if item, _ := c.Get(id); item != nil {
i := item.(models.Item)
return &i
}
return nil
}
// Put a new item into the data cache or updates an existing one.
func Put(item models.Item) *models.Item {
c.SetDefault(item.ID, item)
c.Altered = true
return &item
}
// Delete an item from the data cache by id
func Delete(id string) {
c.Delete(id)
c.Altered = true
return
}