ironsmith/datastore/log.go

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// Copyright 2016 Tim Shannon. All rights reserved.
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.
package datastore
import (
"encoding/json"
"time"
"github.com/boltdb/bolt"
)
type log struct {
When time.Time `json:"when"`
Version string `json:"version"`
Stage string `json:"stage"`
Log string `json:"log"`
}
const bucketLog = "log"
// AddLog adds a new log entry
func (ds *Store) AddLog(version, stage, entry string) error {
key := NewTimeKey()
data := &log{
When: key.Time(),
Version: version,
Stage: stage,
Log: entry,
}
return ds.put(bucketLog, key, data)
}
// LatestVersion returns the latest version (successful or otherwise) for the current project
func (ds *Store) LatestVersion() (string, error) {
version := ""
err := ds.bolt.View(func(tx *bolt.Tx) error {
c := tx.Bucket([]byte(bucketLog)).Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
l := &log{}
err := json.Unmarshal(v, l)
if err != nil {
return err
}
if l.Version != "" {
version = l.Version
return nil
}
}
return ErrNotFound
})
if err != nil {
return "", err
}
return version, nil
}