package common

import "strconv"
import "../query_gen/lib"

// Internal. Don't rely on it.
func ForumListToArgQ(forums []Forum) (argList []interface{}, qlist string) {
	for _, forum := range forums {
		argList = append(argList, strconv.Itoa(forum.ID))
		qlist += "?,"
	}
	if qlist != "" {
		qlist = qlist[0 : len(qlist)-1]
	}
	return argList, qlist
}

// Internal. Don't rely on it.
func ArgQToTopicCount(argList []interface{}, qlist string) (topicCount int, err error) {
	topicCountStmt, err := qgen.Builder.SimpleCount("topics", "parentID IN("+qlist+")", "")
	if err != nil {
		return 0, err
	}
	defer topicCountStmt.Close()

	err = topicCountStmt.QueryRow(argList...).Scan(&topicCount)
	if err != nil && err != ErrNoRows {
		return 0, err
	}
	return topicCount, err
}

func TopicCountInForums(forums []Forum) (topicCount int, err error) {
	return ArgQToTopicCount(ForumListToArgQ(forums))
}