124 lines
2.4 KiB
Go
124 lines
2.4 KiB
Go
package main
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import (
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"os"
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"time"
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"github.com/google/uuid"
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"gopkg.in/yaml.v2"
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)
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type (
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yamlDB struct {
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Knowledge knowledge
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Users map[string]user
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Cadence []duration
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}
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knowledge struct {
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Questions map[string]Question
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Answers map[string]Answer
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}
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user struct {
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Tags []string
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History map[string][]History
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}
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)
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func newYamlDB(p string) (yamlDB, error) {
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db := yamlDB{
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Knowledge: knowledge{
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Questions: map[string]Question{},
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Answers: map[string]Answer{},
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},
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Users: map[string]user{},
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Cadence: []duration{},
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}
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if b, err := os.ReadFile(p); err != nil {
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return yamlDB{}, err
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} else if err := yaml.Unmarshal(b, &db); err != nil {
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return yamlDB{}, err
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}
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return db, nil
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}
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func (db yamlDB) HistoryOf(user string) map[string][]History {
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result := map[string][]History{}
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for k, v := range db.Users[user].History {
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result[k] = append([]History{}, v...)
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}
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for _, tag := range db.Users[user].Tags {
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for qid, q := range db.Knowledge.Questions {
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if _, ok := result[qid]; !ok && q.Tagged(tag) {
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result[qid] = []History{}
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}
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}
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}
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return result
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}
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func (db yamlDB) Next(user, q string) time.Time {
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history := db.Users[user].History[q]
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progress := 0
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for i := range history {
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if history[i].Pass {
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progress += 1
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} else {
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progress -= 1
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}
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}
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if progress < 0 {
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progress = 0
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} else if progress > len(db.Cadence) {
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return time.Now().Add(time.Hour * 24 * 365 * 10)
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}
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return db.lastTS(user, q).Add(time.Duration(db.Cadence[progress]))
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}
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func (db yamlDB) Question(q string) Question {
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return db.Knowledge.Questions[q]
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}
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func (db yamlDB) LastAnswer(user, q string) (string, Answer) {
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maxk := ""
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var maxv Answer
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for k, v := range db.Knowledge.Answers {
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if v.Q == q && v.Author == user {
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if maxv.TS < v.TS {
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maxk = k
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maxv = v
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}
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}
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}
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return maxk, maxv
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}
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func (db yamlDB) Answer(a string) Answer {
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return db.Knowledge.Answers[a]
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}
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func (db yamlDB) PushAnswer(user, q, a string, pass bool) error {
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uuid := uuid.New().String()
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db.Knowledge.Answers[uuid] = Answer{
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Q: q,
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A: a,
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TS: time.Now().UnixNano(),
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Author: user,
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}
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db.Users[user].History[q] = append(db.Users[user].History[q], History{
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A: uuid,
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Pass: pass,
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TS: db.Knowledge.Answers[uuid].TS,
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})
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return nil
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}
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func (db yamlDB) lastTS(user, q string) time.Time {
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max := int64(0)
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for _, v := range db.Users[user].History[q] {
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if v.TS > max {
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max = v.TS
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}
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}
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return time.Unix(0, max)
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}
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