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86 lines
1.7 KiB
86 lines
1.7 KiB
package main
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import (
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"bytes"
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"encoding/json"
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"math"
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"time"
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bolt "go.etcd.io/bbolt"
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)
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const BucketKeyMoments = "moments"
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// loadMoments loads the moments with today as the prefix of the key from the database
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func loadMoments(db *bolt.DB, today string) ([]Moment, error) {
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var moments []Moment
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err := db.View(func(tx *bolt.Tx) error {
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// Assume bucket exists and has keys
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b := tx.Bucket([]byte(BucketKeyMoments))
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if b == nil {
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// no bucket found, so moments should be empty
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return nil
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}
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c := b.Cursor()
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prefix := []byte(today)
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var prevTime time.Time
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for k, v := c.Seek(prefix); k != nil && bytes.HasPrefix(k, prefix); k, v = c.Next() {
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var moment Moment
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err := json.Unmarshal(v, &moment)
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if err != nil {
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return err
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}
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if prevTime.IsZero() {
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moment.Diff = 0
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} else {
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d := float64(moment.Time.Sub(prevTime)) / 1000000000.0 / 60.0
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moment.Diff = int64(math.Ceil(d))
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}
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prevTime = moment.Time
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moments = append(moments, moment)
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}
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// TODO(peter): if there are no moments, here we can add a moment for the start of the day
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return nil
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})
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return moments, err
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}
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// saveMemo saves one memo to the database, it automatically generates a key
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// based on the timestamp
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func saveMemo(db *bolt.DB, timestamp time.Time, memo string) error {
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err := db.Update(func(tx *bolt.Tx) error {
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bucket, err := tx.CreateBucketIfNotExists([]byte(BucketKeyMoments))
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if err != nil {
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return err
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}
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key := timestamp.Format(time.RFC3339)
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m := Moment{
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Key: key,
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Memo: memo,
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Time: timestamp,
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}
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buf, err := json.Marshal(m)
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if err != nil {
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return err
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}
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return bucket.Put([]byte(m.Key), buf)
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})
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return err
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}
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