Progress game via replies

db/db.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"database/sql"
+	"errors"
 	"log"
 
 	sn "github.com/ekzyis/snappy"
@@ -64,3 +65,30 @@ func InsertItem(item *sn.Item) error {
 
 	return nil
 }
+
+func GetThread(id int) ([]sn.Item, error) {
+	var (
+		items []sn.Item
+		err   error
+	)
+
+	var item sn.Item
+	item.ParentId = id
+
+	for item.ParentId > 0 {
+		// TODO: can't select created_at because sqlite3 doesn't support timestamps natively
+		// see https://github.com/mattn/go-sqlite3/issues/142
+		if err = db.QueryRow(
+			`SELECT id, user_id, text, COALESCE(parent_id, 0) FROM items WHERE id = ?`, item.ParentId).
+			Scan(&item.Id, &item.User.Id, &item.Text, &item.ParentId); err != nil {
+			if err == sql.ErrNoRows {
+				return nil, errors.New("item not found in db")
+			}
+			return nil, err
+		}
+
+		items = append([]sn.Item{item}, items...)
+	}
+
+	return items, nil
+}

main.go

@@ -20,9 +20,8 @@ func main() {
 
 	for {
 		tickGameStart(c)
-		// TODO: implement game progress
+		tickGameProgress(c)
-		// tickGameProgress(c)
+		time.Sleep(30 * time.Second)
-		time.Sleep(1 * time.Minute)
 	}
 }
 
@@ -42,11 +41,11 @@ func tickGameStart(c *sn.Client) {
 	for _, n := range mentions {
 
 		if exists, err := db.ItemHasReply(n.Item.Id, meId); err != nil {
-			log.Printf("error during reply check: %v\n", err)
+			log.Printf("error during game start check: %v\n", err)
 			continue
 		} else if exists {
 			// TODO: check if move changed
-			log.Printf("reply already exists: id=%d\n", n.Item.Id)
+			log.Printf("game start already exists: id=%d\n", n.Item.Id)
 			continue
 		}
 
@@ -65,6 +64,12 @@ func tickGameStart(c *sn.Client) {
 			continue
 		}
 
+		n.Item.ParentId = 0
+		if err = db.InsertItem(&n.Item); err != nil {
+			log.Printf("error inserting item into db: %v: id=%d\n", err, n.Item.Id)
+			continue
+		}
+
 		var cId int
 		parentId := n.Item.Id
 		if cId, err = c.CreateComment(parentId, imgUrl); err != nil {
@@ -72,12 +77,6 @@ func tickGameStart(c *sn.Client) {
 			continue
 		}
 
-		n.Item.ParentId = 0
-		if err = db.InsertItem(&n.Item); err != nil {
-			log.Printf("error inserting item into db: %v: id=%d\n", err, n.Item.Id)
-			continue
-		}
-
 		var item *sn.Item
 		if item, err = c.Item(cId); err != nil {
 			log.Printf("error fetching item: %v: id=%d\n", cId)
@@ -91,3 +90,90 @@ func tickGameStart(c *sn.Client) {
 		log.Printf("started new game: id=%d\n", n.Item.Id)
 	}
 }
+
+func tickGameProgress(c *sn.Client) {
+	var (
+		replies []sn.Notification
+		err     error
+	)
+
+	if replies, err = c.Replies(); err != nil {
+		log.Printf("replies error: %v\n", err)
+		return
+	}
+
+	log.Printf("fetched %d replies\n", len(replies))
+
+	for _, n := range replies {
+
+		if exists, err := db.ItemHasReply(n.Item.Id, meId); err != nil {
+			log.Printf("error during game update check: %v\n", err)
+			continue
+		} else if exists {
+			// TODO: check if move changed
+			log.Printf("game update already exists: id=%d\n", n.Item.Id)
+			continue
+		}
+
+		var thread []sn.Item
+		if thread, err = db.GetThread(n.Item.ParentId); err != nil {
+			log.Printf("error fetching thread: %v: id=%d\n", err, n.Item.ParentId)
+			continue
+		}
+
+		b := chess.NewBoard()
+		// TODO: better parsing of moves in replies using regexp for example or enforce a specific format
+		// since players might include more than just the move in their replies
+		move := strings.Trim(n.Item.Text, " ")
+		for _, item := range thread {
+			if item.User.Id == meId {
+				continue
+			}
+			move := strings.Trim(strings.ReplaceAll(item.Text, "@chess", ""), " ")
+			if err = b.Move(move); err != nil {
+				log.Printf("error moving piece: %v: id=%d\n", err, item.Id)
+				break
+			}
+		}
+
+		// continue with next reply if the thread loop failed
+		if err != nil {
+			continue
+		}
+
+		if err = b.Move(move); err != nil {
+			log.Printf("error moving piece: %v: id=%d\n", err, n.Item.ParentId)
+			continue
+		}
+
+		img := b.Image()
+		var imgUrl string
+		if imgUrl, err = c.UploadImage(img); err != nil {
+			log.Printf("error uploading image: %v\n", err)
+			continue
+		}
+
+		if err = db.InsertItem(&n.Item); err != nil {
+			log.Printf("error inserting item into db: %v: id=%d\n", err, n.Item.Id)
+			continue
+		}
+
+		var cId int
+		if cId, err = c.CreateComment(n.Item.Id, imgUrl); err != nil {
+			log.Printf("error creating reply: %v\n", err)
+			continue
+		}
+
+		var item *sn.Item
+		if item, err = c.Item(cId); err != nil {
+			log.Printf("error fetching item: %v: id=%d\n", cId)
+			continue
+		}
+		if err = db.InsertItem(item); err != nil {
+			log.Printf("error inserting item into db: %v: id=%d\n", err, item.Id)
+			continue
+		}
+
+		log.Printf("continued game: move=%s id=%d\n", move, cId)
+	}
+}