mirror of https://github.com/velour/catbase.git
513 lines
12 KiB
Go
513 lines
12 KiB
Go
// © 2013 the CatBase Authors under the WTFPL. See AUTHORS for the list of authors.
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package babbler
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import (
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"database/sql"
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"errors"
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"fmt"
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"log"
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"math/rand"
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"strings"
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"github.com/jmoiron/sqlx"
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"github.com/velour/catbase/bot"
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"github.com/velour/catbase/bot/msg"
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"github.com/velour/catbase/config"
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)
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var (
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NO_BABBLER = errors.New("babbler not found")
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SAID_NOTHING = errors.New("hasn't said anything yet")
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)
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type BabblerPlugin struct {
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Bot bot.Bot
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db *sqlx.DB
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config *config.Config
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}
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func New(bot bot.Bot) *BabblerPlugin {
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log.SetFlags(log.LstdFlags | log.Lshortfile)
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if bot.DBVersion() == 1 {
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if _, err := bot.DB().Exec(`create table if not exists babblers (
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id integer primary key,
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babbler string
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);`); err != nil {
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log.Fatal(err)
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}
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if _, err := bot.DB().Exec(`create table if not exists babblerWords (
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id integer primary key,
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babblerId integer,
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word string,
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root integer,
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rootFrequency integer
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);`); err != nil {
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log.Fatal(err)
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}
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if _, err := bot.DB().Exec(`create table if not exists babblerArcs (
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id integer primary key,
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fromWordId integer,
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toWordId interger,
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frequency integer
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);`); err != nil {
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log.Fatal(err)
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}
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}
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plugin := &BabblerPlugin{
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Bot: bot,
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db: bot.DB(),
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config: bot.Config(),
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}
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return plugin
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}
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func (p *BabblerPlugin) Message(message msg.Message) bool {
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lowercase := strings.ToLower(message.Body)
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tokens := strings.Fields(lowercase)
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numTokens := len(tokens)
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saidSomething := false
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saidWhat := ""
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if numTokens >= 2 && tokens[1] == "says" {
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saidWhat, saidSomething = p.getBabble(tokens)
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} else if len(tokens) == 4 && strings.Index(lowercase, "initialize babbler for ") == 0 {
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saidWhat, saidSomething = p.initializeBabbler(tokens)
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} else if strings.Index(lowercase, "batch learn for ") == 0 {
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saidWhat, saidSomething = p.batchLearn(tokens)
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} else if len(tokens) == 5 && strings.Index(lowercase, "merge babbler") == 0 {
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saidWhat, saidSomething = p.merge(tokens)
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} else {
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//this should always return "", false
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saidWhat, saidSomething = p.addToBabbler(message.User.Name, lowercase)
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}
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if saidSomething {
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p.Bot.SendMessage(message.Channel, saidWhat)
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}
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return saidSomething
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}
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func (p *BabblerPlugin) Help(channel string, parts []string) {
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p.Bot.SendMessage(channel, "initialize babbler for seabass\n\nseabass says")
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}
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func (p *BabblerPlugin) Event(kind string, message msg.Message) bool {
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return false
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}
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func (p *BabblerPlugin) BotMessage(message msg.Message) bool {
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return false
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}
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func (p *BabblerPlugin) RegisterWeb() *string {
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return nil
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}
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func (p *BabblerPlugin) makeBabbler(babbler string) (int64, error) {
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res, err := p.db.Exec(`insert into babblers (babbler) values (?);`, babbler)
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if err == nil {
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id, _ := res.LastInsertId()
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return id, nil
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}
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return -1, err
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}
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func (p *BabblerPlugin) getBabbler(babbler string) (int64, error) {
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id := int64(-1)
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err := p.db.Get(&id, `select id from babblers where babbler = ?`, babbler)
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if err != nil && err == sql.ErrNoRows {
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return -1, NO_BABBLER
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}
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return id, err
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}
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func (p *BabblerPlugin) getOrCreateBabbler(babbler string) (int64, error) {
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id, err := p.getBabbler(babbler)
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if err != nil {
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id, err = p.makeBabbler(babbler)
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if err != nil {
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return id, err
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}
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query := fmt.Sprintf(`select tidbit from factoid where fact like '%s quotes';`, babbler)
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rows, err := p.db.Query(query)
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if err != nil {
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//we'll just ignore this but the actual creation succeeded previously
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return id, nil
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}
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for rows.Next() {
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var tidbit string
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err := rows.Scan(&tidbit)
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if err != nil {
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return id, err
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}
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p.addToMarkovChain(id, tidbit)
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}
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}
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return id, err
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}
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func (p *BabblerPlugin) getWordId(babblerId int64, word string) (int64, error) {
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id := int64(-1)
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err := p.db.Get(&id, `select id from babblerWords where babblerId = ? and word = ?`, babblerId, word)
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return id, err
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}
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func (p *BabblerPlugin) createNewWord(babblerId int64, word string) (int64, error) {
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res, err := p.db.Exec(`insert into babblerWords (babblerId, word, root, rootFrequency) values (?, ?, 0, 0);`, babblerId, word)
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if err != nil {
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return -1, err
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}
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id, _ := res.LastInsertId()
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return id, nil
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}
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func (p *BabblerPlugin) getOrCreateWord(babblerId int64, word string) (int64, error) {
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id, err := p.getWordId(babblerId, word)
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if err != nil {
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return p.createNewWord(babblerId, word)
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}
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return id, err
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}
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func (p *BabblerPlugin) incrementRootWordFrequency(babblerId int64, word string) (int64, error) {
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id, err := p.getOrCreateWord(babblerId, word)
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if err != nil {
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return -1, err
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}
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_, err = p.db.Exec(`update babblerWords set rootFrequency = rootFrequency + 1, root = 1 where id = ?;`, id)
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if err != nil {
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return -1, err
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}
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return id, nil
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}
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func (p *BabblerPlugin) getWordArcHelper(fromWordId, toWordId int64) (int64, error) {
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id := int64(-1)
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err := p.db.Get(&id, `select id from babblerArcs where fromWordId = ? and toWordId = ?`, fromWordId, toWordId)
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return id, err
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}
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func (p *BabblerPlugin) incrementWordArc(fromWordId, toWordId int64) (int64, error) {
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res, err := p.db.Exec(`update babblerArcs set frequency = frequency + 1 where fromWordId = ? and toWordId = ?`, fromWordId, toWordId)
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affectedRows := int64(0)
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if err == nil {
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affectedRows, _ = res.RowsAffected()
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}
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if err != nil || affectedRows == 0 {
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res, err = p.db.Exec(`insert into babblerArcs (fromWordId, toWordId, frequency) values (?, ?, 1);`, fromWordId, toWordId)
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if err != nil {
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return -1, err
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}
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}
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id, _ := res.LastInsertId()
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return id, nil
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}
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func (p *BabblerPlugin) incrementFinalWordArcHelper(wordId int64) (int64, error) {
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return p.incrementWordArc(wordId, -1)
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}
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func (p *BabblerPlugin) incrementWordArcHelper(babblerId, fromWordId int64, toWord string) (int64, error) {
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toWordId, err := p.getOrCreateWord(babblerId, toWord)
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if err != nil {
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return -1, err
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}
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_, err = p.incrementWordArc(fromWordId, toWordId)
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if err != nil {
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return -1, err
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}
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return toWordId, nil
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}
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func (p *BabblerPlugin) addToMarkovChain(babblerId int64, phrase string) {
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words := strings.Fields(strings.ToLower(phrase))
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if len(words) <= 0 {
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return
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}
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id, err := p.incrementRootWordFrequency(babblerId, words[0])
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if err != nil {
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return
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}
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for i := 1; i < len(words); i++ {
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id, err = p.incrementWordArcHelper(babblerId, id, words[i])
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if err != nil {
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return
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}
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}
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_, err = p.incrementFinalWordArcHelper(id)
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}
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func (p *BabblerPlugin) getWeightedRootWord(babblerId int64) (int64, string, error) {
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query := fmt.Sprintf("select id, word, rootFrequency from babblerWords where babblerId = %d and root = 1", babblerId)
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rows, err := p.db.Query(query)
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if err != nil {
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return -1, "", err
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}
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defer rows.Close()
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idToWord := map[int64]string{}
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idToFreq := map[int64]int64{}
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total := int64(0)
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for rows.Next() {
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var id int64
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var word string
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var rootFrequency int64
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err = rows.Scan(&id, &word, &rootFrequency)
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if err != nil {
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return -1, "", err
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}
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total += rootFrequency
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idToFreq[id] = rootFrequency
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idToWord[id] = word
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}
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if total == 0 {
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return -1, "", SAID_NOTHING
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}
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which := rand.Int63n(total)
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total = 0
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for id, freq := range idToFreq {
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if total+freq >= which {
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return id, idToWord[id], nil
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}
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total += freq
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}
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log.Fatalf("shouldn't happen")
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return -1, "", errors.New("failed to find weighted root word")
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}
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func (p *BabblerPlugin) getWeightedNextWord(fromWordId int64) (int64, string, error) {
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query := fmt.Sprintf("select toWordId, frequency from babblerArcs where fromWordId = %d;", fromWordId)
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rows, err := p.db.Query(query)
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if err != nil {
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return -1, "", err
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}
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defer rows.Close()
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idToFreq := map[int64]int64{}
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total := int64(0)
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for rows.Next() {
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var toWordId int64
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var frequency int64
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err = rows.Scan(&toWordId, &frequency)
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if err != nil {
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return -1, "", err
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}
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total += frequency
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idToFreq[toWordId] = frequency
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}
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if total == 0 {
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return -1, "", errors.New("missing arcs")
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}
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which := rand.Int63n(total)
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total = 0
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for id, freq := range idToFreq {
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if total+freq >= which {
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if id < 0 {
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return -1, "", nil
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}
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var word string
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err := p.db.Get(&word, `select word from babblerWords where id = ?`, id)
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if err != nil {
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return -1, "", err
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}
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return id, word, nil
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}
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total +=freq
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}
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log.Fatalf("shouldn't happen")
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return -1, "", errors.New("failed to find weighted next word")
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}
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func (p *BabblerPlugin) babble(who string) (string, error) {
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return p.babbleSeed(who, []string{})
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}
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func (p *BabblerPlugin) babbleSeed(babbler string, seed []string) (string, error) {
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babblerId, err := p.getBabbler(babbler)
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if err != nil {
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return "", nil
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}
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words := seed
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var curWordId int64
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if len(seed) == 0 {
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id, word, err := p.getWeightedRootWord(babblerId)
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if err != nil {
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return "", err
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}
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curWordId = id
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words = append(words, word)
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} else {
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id, err := p.getWordId(babblerId, seed[0])
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if err != nil {
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return "", err
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}
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curWordId = id
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for i := 1; i < len(seed); i++ {
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nextWordId, err := p.getWordId(babblerId, seed[i])
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if err != nil {
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return "", err
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}
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_, err = p.getWordArcHelper(curWordId, nextWordId)
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if err != nil {
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return "", err
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}
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curWordId = nextWordId
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}
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}
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for {
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id, word, err := p.getWeightedNextWord(curWordId)
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if err != nil {
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return "", err
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}
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if id < 0 {
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break
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}
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words = append(words, word)
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curWordId = id
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}
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return strings.TrimSpace(strings.Join(words, " ")), nil
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}
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func (p *BabblerPlugin) mergeBabblers(intoId, otherId int64, intoName, otherName string) error {
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intoString := "<" + intoName + ">"
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otherString := "<" + otherName + ">"
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mapping := map[int64]int64{}
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query := fmt.Sprintf("select id, word, root, rootFrequency from babblerWords where babblerId = %d;", otherId)
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rows, err := p.db.Query(query)
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if err != nil {
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return err
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}
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defer rows.Close()
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type Word struct {
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Id int64
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Word string
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Root int64
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RootFrequency int64
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}
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words := []Word{}
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for rows.Next() {
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word := Word{}
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err = rows.Scan(&word.Id, &word.Word, &word.Root, &word.RootFrequency)
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if err != nil {
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return err
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}
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words = append(words, word)
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}
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for _, word := range words {
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if word.Word == otherString {
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word.Word = intoString
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}
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doInsert := false
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wordId := int64(-1)
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if word.Root > 0 {
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res, err := p.db.Exec(`update babblerWords set rootFrequency = rootFrequency + ?, root = 1 where babblerId = ? and word = ? output id ;`, word.RootFrequency, intoId, word.Word)
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rowsAffected := int64(0)
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if err == nil {
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rowsAffected, _ = res.RowsAffected()
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}
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if err != nil || rowsAffected == 0 {
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doInsert = true
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} else {
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wordId, _ = res.LastInsertId()
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}
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} else {
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res, err := p.db.Exec(`update babblerWords set rootFrequency = rootFrequency + ? where babblerId = ? and word = ? output id;`, word.RootFrequency, intoId, word.Word)
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if err != nil {
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doInsert = true
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} else {
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wordId, _ = res.LastInsertId()
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}
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}
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if doInsert {
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res, err := p.db.Exec(`insert into babblerWords (babblerId, word, root, rootFrequency) values (?,?,?,?) ;`, intoId, word.Word, word.Root, word.RootFrequency)
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if err != nil {
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return err
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}
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wordId, _ = res.LastInsertId()
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}
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mapping[word.Id] = wordId
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}
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type Arc struct {
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ToWordId int64
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Frequency int64
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}
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for lookup, newArcStart := range mapping {
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query = fmt.Sprintf("select toWordId, frequency from babblerArcs where fromWordId = %d;", lookup)
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rows, err := p.db.Query(query)
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if err != nil {
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return err
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}
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defer rows.Close()
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arcs := []Arc{}
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for rows.Next() {
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var arc Arc
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err = rows.Scan(&arc.ToWordId, &arc.Frequency)
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if err != nil {
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return err
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}
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arcs = append(arcs, arc)
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}
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for _, arc := range arcs {
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newArcEnd := int64(-1) //handle end arcs
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if arc.ToWordId >= 0 {
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newArcEnd = mapping[arc.ToWordId]
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}
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res, err := p.db.Exec(`update babblerArcs set frequency = frequency + ? where fromWordId = ? and toWordId = ?`, arc.Frequency, newArcStart, newArcEnd)
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rowsAffected := int64(0)
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if err == nil {
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rowsAffected, _ = res.RowsAffected()
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}
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if err != nil || rowsAffected == 0 {
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_, err = p.db.Exec(`insert into babblerArcs (fromWordId, toWordId, frequency) values (?, ?, ?);`, newArcStart, newArcEnd, arc.Frequency)
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if err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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