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templates.go
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/
templates.go
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/*
Copyright 2017 WALLIX
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package database
import (
"errors"
"fmt"
"github.com/wallix/awless/template"
"github.com/boltdb/bolt"
)
const TEMPLATES_BUCKET = "templates"
func (db *DB) AddTemplate(tplExec *template.TemplateExecution) error {
return db.bolt.Update(func(tx *bolt.Tx) error {
if tplExec.ID == "" {
return errors.New("cannot persist template with empty ID")
}
bucket, err := tx.CreateBucketIfNotExists([]byte(TEMPLATES_BUCKET))
if err != nil {
return fmt.Errorf("create bucket %s: %s", TEMPLATES_BUCKET, err)
}
b, err := tplExec.MarshalJSON()
if err != nil {
return err
}
return bucket.Put([]byte(tplExec.ID), b)
})
}
func (db *DB) GetTemplate(id string) (*template.TemplateExecution, error) {
tplExec := &template.TemplateExecution{}
err := db.bolt.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(TEMPLATES_BUCKET))
if b == nil {
return errors.New("no templates stored yet")
}
if content := b.Get([]byte(id)); content != nil {
return tplExec.UnmarshalJSON(content)
} else {
return fmt.Errorf("no content for id '%s'", id)
}
})
return tplExec, err
}
func (db *DB) DeleteTemplates() error {
return db.bolt.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(TEMPLATES_BUCKET))
if b == nil {
return nil
}
return tx.DeleteBucket([]byte(TEMPLATES_BUCKET))
})
}
func (db *DB) DeleteTemplate(id string) error {
return db.bolt.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(TEMPLATES_BUCKET))
if b == nil {
return errors.New("no templates stored yet")
}
return b.Delete([]byte(id))
})
}
type LoadedTemplate struct {
Err error
TplExec *template.TemplateExecution
Key, Raw string
}
func (db *DB) GetLoadedTemplate(id string) (*LoadedTemplate, error) {
loadedTpl := &LoadedTemplate{}
err := db.bolt.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(TEMPLATES_BUCKET))
if b == nil {
return errors.New("no templates stored yet")
}
if content := b.Get([]byte(id)); content != nil {
tplExec := &template.TemplateExecution{}
terr := tplExec.UnmarshalJSON(content)
loadedTpl.TplExec = tplExec
loadedTpl.Err = terr
loadedTpl.Key = string(id)
loadedTpl.Raw = string(content)
return nil
}
return fmt.Errorf("no content for id '%s'", id)
})
return loadedTpl, err
}
func (db *DB) ListTemplates() ([]*LoadedTemplate, error) {
var results []*LoadedTemplate
err := db.bolt.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(TEMPLATES_BUCKET))
if b == nil {
return nil
}
c := b.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
tplExec := &template.TemplateExecution{}
terr := tplExec.UnmarshalJSON(v)
lt := &LoadedTemplate{TplExec: tplExec, Err: terr, Key: string(k), Raw: string(v)}
results = append(results, lt)
}
return nil
})
return results, err
}