Even more custom babbling... with bookends! closed #58

plugins/babbler/babbler.go

@@ -110,7 +110,12 @@ func (p *BabblerPlugin) Message(message msg.Message) bool {
 	saidSomething := false
 	saidWhat := ""
 
-	if numTokens >= 2 && tokens[1] == "says" {
+	if numTokens > 2 && tokens[1] == "says" && strings.Contains(lowercase, "syas") {
+		split := strings.Split(lowercase, "syas")
+		start := strings.Fields(split[0])
+		end := strings.Fields(split[1])
+		saidWhat, saidSomething = p.getBabbleWithBookends(start, end)
+	} else if numTokens >= 2 && tokens[1] == "says" {
 		saidWhat, saidSomething = p.getBabble(tokens)
 	} else if numTokens > 2 && tokens[1] == "syas" {
 		saidWhat, saidSomething = p.getBabbleWithSuffix(tokens)
@@ -553,6 +558,30 @@ func (p *BabblerPlugin) getWeightedPreviousWord(toNode *BabblerNode) (*BabblerNo
 	return nil, nil, false, errors.New("failed to find weighted previous word")
 }
 
+func (p *BabblerPlugin) verifyPhrase(babbler *Babbler, phrase []string) (*BabblerNode, *BabblerNode, error) {
+	curNode, err := p.getBabblerNode(babbler, phrase[0])
+	if err != nil {
+		log.Print(err)
+		return nil, nil, err
+	}
+	firstNode := curNode
+	for i := 1; i < len(phrase); i++ {
+		nextNode, err := p.getBabblerNode(babbler, phrase[i])
+		if err != nil {
+			log.Print(err)
+			return nil, nil, err
+		}
+		_, err = p.getBabblerArc(curNode, nextNode)
+		if err != nil {
+			log.Print(err)
+			return nil, nil, err
+		}
+		curNode = nextNode
+	}
+
+	return firstNode, curNode, nil
+}
+
 func (p *BabblerPlugin) babble(who string) (string, error) {
 	return p.babbleSeed(who, []string{})
 }
@@ -576,24 +605,11 @@ func (p *BabblerPlugin) babbleSeed(babblerName string, seed []string) (string, e
 		}
 		words = append(words, curWord.Word)
 	} else {
-		curNode, err = p.getBabblerNode(babbler, seed[0])
+		_, curNode, err = p.verifyPhrase(babbler, seed)
 		if err != nil {
 			log.Print(err)
 			return "", err
 		}
-		for i := 1; i < len(seed); i++ {
-			nextNode, err := p.getBabblerNode(babbler, seed[i])
-			if err != nil {
-				log.Print(err)
-				return "", err
-			}
-			_, err = p.getBabblerArc(curNode, nextNode)
-			if err != nil {
-				log.Print(err)
-				return "", err
-			}
-			curNode = nextNode
-		}
 	}
 
 	for {
@@ -720,7 +736,6 @@ func (p *BabblerPlugin) mergeBabblers(intoBabbler, otherBabbler *Babbler, intoNa
 	return err
 }
 
-
 func (p *BabblerPlugin) babbleSeedSuffix(babblerName string, seed []string) (string, error) {
 	babbler, err := p.getBabbler(babblerName)
 	if err != nil {
@@ -728,30 +743,11 @@ func (p *BabblerPlugin) babbleSeedSuffix(babblerName string, seed []string) (str
 		return "", nil
 	}
 
-	var curNode *BabblerNode
-	var firstNode *BabblerNode
-
-	//this is weird, but let's first make sure that the suffix exists "in order"
-	//because it's already writen and we need to do it anyway...
-	curNode, err = p.getBabblerNode(babbler, seed[0])
+	firstNode, curNode, err := p.verifyPhrase(babbler, seed)
 	if err != nil {
 		log.Print(err)
 		return "", err
 	}
-	firstNode = curNode
-	for i := 1; i < len(seed); i++ {
-		nextNode, err := p.getBabblerNode(babbler, seed[i])
-		if err != nil {
-			log.Print(err)
-			return "", err
-		}
-		_, err = p.getBabblerArc(curNode, nextNode)
-		if err != nil {
-			log.Print(err)
-			return "", err
-		}
-		curNode = nextNode
-	}
 
 	words := []string{}
 	var curWord *BabblerWord
@@ -784,3 +780,136 @@ func (p *BabblerPlugin) babbleSeedSuffix(babblerName string, seed []string) (str
 
 	return strings.TrimSpace(strings.Join(words, " ")), nil
 }
+
+func (p *BabblerPlugin) getNextArcs(babblerNodeId int64) ([]*BabblerArc, error) {
+	arcs := []*BabblerArc{}
+	rows, err := p.db.Queryx(`select * from babblerArcs where fromNodeId = ?;`, babblerNodeId)
+	if err != nil {
+		log.Print(err)
+		return arcs, err
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var arc BabblerArc
+		err = rows.StructScan(&arc)
+		if err != nil {
+			log.Print(err)
+			return []*BabblerArc{}, err
+		}
+		arcs = append(arcs, &arc)
+	}
+	return arcs, nil
+}
+
+func (p *BabblerPlugin) getBabblerNodeById(nodeId int64) (*BabblerNode, error) {
+	var node BabblerNode
+	err := p.db.QueryRowx(`select * from babblerNodes where id = ? LIMIT 1;`, nodeId).StructScan(&node)
+	if err != nil {
+		log.Print(err)
+		return nil, err
+	}
+	return &node, nil
+}
+
+func shuffle(a []*BabblerArc) {
+    for i := range a {
+        j := rand.Intn(i + 1)
+        a[i], a[j] = a[j], a[i]
+    }
+}
+
+func (p *BabblerPlugin) babbleSeedBookends(babblerName string, start, end []string) (string, error) {
+	babbler, err := p.getBabbler(babblerName)
+	if err != nil {
+		log.Print(err)
+		return "", nil
+	}
+
+	_, startWordNode, err := p.verifyPhrase(babbler, start)
+	if err != nil {
+		log.Print(err)
+		return "", err
+	}
+
+	endWordNode, _, err := p.verifyPhrase(babbler, end)
+	if err != nil {
+		log.Print(err)
+		return "", err
+	}
+
+	type searchNode struct {
+		babblerNodeId int64
+		previous *searchNode
+	}
+
+	open := []*searchNode{ &searchNode{startWordNode.NodeId, nil} }
+	closed := map[int64]*searchNode{ startWordNode.NodeId : open[0] }
+	goalNodeId := int64(-1)
+
+	for i := 0; i < len(open) && i < 250; i++ {
+		cur := open[i]
+
+		arcs, err := p.getNextArcs(cur.babblerNodeId)
+		if err != nil {
+			return "", err
+		}
+		//add a little randomization in through child ordering
+		shuffle(arcs)
+
+		for _, arc := range arcs {
+			if _, ok := closed[arc.ToNodeId]; !ok {
+				child := &searchNode{arc.ToNodeId, cur}
+				open = append(open, child)
+				closed[arc.ToNodeId] = child
+
+				if arc.ToNodeId == endWordNode.NodeId {
+					goalNodeId = cur.babblerNodeId
+					break
+				}
+			}
+		}
+	}
+
+	if goalNodeId == -1 {
+		return "", errors.New("couldn't find path")
+	} else if closed[goalNodeId].previous == nil {
+		seeds := append(start, end...)
+		return strings.Join(seeds, " "), nil
+	}
+
+	words := []string{}
+
+	curSearchNode := closed[goalNodeId]
+
+	for {
+		cur, err := p.getBabblerNodeById(curSearchNode.babblerNodeId)
+		if err != nil {
+			log.Print(err)
+			return "", err
+		}
+		var w BabblerWord
+		err = p.db.QueryRowx(`select * from babblerWords where id = ? LIMIT 1;`, cur.WordId).StructScan(&w)
+		if err != nil {
+			log.Print(err)
+			return "", err
+		}
+		words = append(words, w.Word)
+
+		curSearchNode = closed[curSearchNode.previous.babblerNodeId]
+
+		if curSearchNode.previous == nil {
+			break
+		}
+	}
+
+	for i := 0; i < len(words) / 2; i++ {
+		index := len(words)-(i+1)
+		words[i], words[index] = words[index], words[i]
+	}
+
+	words = append(start, words...)
+	words = append(words, end...)
+
+	return strings.Join(words, " "), nil
+}

plugins/babbler/babbler_test.go

@@ -195,6 +195,48 @@ func TestBabblerBadSuffixSeed(t *testing.T) {
 	assert.Contains(t, mb.Messages[0], "seabass never said 'anything true'")
 }
 
+func TestBabblerBookendSeed(t *testing.T) {
+	mb := bot.NewMockBot()
+	c := New(mb)
+	c.config.Babbler.DefaultUsers = []string{"seabass"}
+	assert.NotNil(t, c)
+	seabass := makeMessage("It's easier to test with unique messages")
+	seabass.User = &user.User{Name: "seabass"}
+	res := c.Message(seabass)
+	res = c.Message(makeMessage("!seabass says It's easier syas unique messages"))
+	assert.Len(t, mb.Messages, 1)
+	assert.True(t, res)
+	assert.Contains(t, mb.Messages[0], "it's easier to test with unique messages")
+}
+
+func TestBabblerBookendSeedShort(t *testing.T) {
+	mb := bot.NewMockBot()
+	c := New(mb)
+	c.config.Babbler.DefaultUsers = []string{"seabass"}
+	assert.NotNil(t, c)
+	seabass := makeMessage("It's easier to test with unique messages")
+	seabass.User = &user.User{Name: "seabass"}
+	res := c.Message(seabass)
+	res = c.Message(makeMessage("!seabass says It's easier to test with syas unique messages"))
+	assert.Len(t, mb.Messages, 1)
+	assert.True(t, res)
+	assert.Contains(t, mb.Messages[0], "it's easier to test with unique messages")
+}
+
+func TestBabblerBadBookendSeed(t *testing.T) {
+	mb := bot.NewMockBot()
+	c := New(mb)
+	c.config.Babbler.DefaultUsers = []string{"seabass"}
+	assert.NotNil(t, c)
+	seabass := makeMessage("It's easier to test with unique messages")
+	seabass.User = &user.User{Name: "seabass"}
+	res := c.Message(seabass)
+	res = c.Message(makeMessage("!seabass says It's easier syas not unique messages"))
+	assert.Len(t, mb.Messages, 1)
+	assert.True(t, res)
+	assert.Contains(t, mb.Messages[0], "seabass never said 'it's easier ... not unique messages'")
+}
+
 func TestBabblerBatch(t *testing.T) {
 	mb := bot.NewMockBot()
 	c := New(mb)

plugins/babbler/commands.go

@@ -77,6 +77,33 @@ func (p *BabblerPlugin) getBabbleWithSuffix(tokens []string) (string, bool) {
 	return "", false
 }
 
+func (p *BabblerPlugin) getBabbleWithBookends(start, end []string) (string, bool) {
+	who := start[0]
+	_, err := p.getBabbler(who)
+
+	if err != nil {
+		if err == NO_BABBLER {
+			return fmt.Sprintf("%s babbler not found.", who), true
+		}
+	} else {
+
+		saying, err := p.babbleSeedBookends(who, start[2:], end)
+
+		if err != nil {
+			if err == SAID_NOTHING {
+				return fmt.Sprintf("%s hasn't said anything yet.", who), true
+			} else if err == NEVER_SAID {
+				seeds := append(start[2:], "...")
+				seeds = append(seeds, end...)
+				return fmt.Sprintf("%s never said '%s'", who, strings.Join(seeds, " ")), true
+			}
+		} else if saying != "" {
+			return saying, true
+		}
+	}
+	return "", false
+}
+
 func (p *BabblerPlugin) batchLearn(tokens []string) (string, bool) {
 	who := tokens[3]
 	babblerId, err := p.getOrCreateBabbler(who)