gosora/common/topic_store.go

255 lines
7.1 KiB
Go

/*
*
* Gosora Topic Store
* Copyright Azareal 2017 - 2020
*
*/
package common
import (
"database/sql"
"errors"
"strconv"
"strings"
"github.com/Azareal/Gosora/query_gen"
)
// TODO: Add the watchdog goroutine
// TODO: Add some sort of update method
// ? - Should we add stick, lock, unstick, and unlock methods? These might be better on the Topics not the TopicStore
var Topics TopicStore
var ErrNoTitle = errors.New("This message is missing a title")
var ErrLongTitle = errors.New("The title is too long")
var ErrNoBody = errors.New("This message is missing a body")
type TopicStore interface {
DirtyGet(id int) *Topic
Get(id int) (*Topic, error)
BypassGet(id int) (*Topic, error)
BulkGetMap(ids []int) (list map[int]*Topic, err error)
Exists(id int) bool
Create(fid int, topicName string, content string, uid int, ipaddress string) (tid int, err error)
AddLastTopic(item *Topic, fid int) error // unimplemented
Reload(id int) error // Too much SQL logic to move into TopicCache
// TODO: Implement these two methods
//Replies(tid int) ([]*Reply, error)
//RepliesRange(tid int, lower int, higher int) ([]*Reply, error)
Count() int
SetCache(cache TopicCache)
GetCache() TopicCache
}
type DefaultTopicStore struct {
cache TopicCache
get *sql.Stmt
exists *sql.Stmt
count *sql.Stmt
create *sql.Stmt
}
// NewDefaultTopicStore gives you a new instance of DefaultTopicStore
func NewDefaultTopicStore(cache TopicCache) (*DefaultTopicStore, error) {
acc := qgen.NewAcc()
if cache == nil {
cache = NewNullTopicCache()
}
return &DefaultTopicStore{
cache: cache,
get: acc.Select("topics").Columns("title, content, createdBy, createdAt, lastReplyBy, lastReplyAt, lastReplyID, is_closed, sticky, parentID, ipaddress, views, postCount, likeCount, attachCount, poll, data").Where("tid = ?").Prepare(),
exists: acc.Select("topics").Columns("tid").Where("tid = ?").Prepare(),
count: acc.Count("topics").Prepare(),
create: acc.Insert("topics").Columns("parentID, title, content, parsed_content, createdAt, lastReplyAt, lastReplyBy, ipaddress, words, createdBy").Fields("?,?,?,?,UTC_TIMESTAMP(),UTC_TIMESTAMP(),?,?,?,?").Prepare(),
}, acc.FirstError()
}
func (s *DefaultTopicStore) DirtyGet(id int) *Topic {
topic, err := s.cache.Get(id)
if err == nil {
return topic
}
topic, err = s.BypassGet(id)
if err == nil {
_ = s.cache.Set(topic)
return topic
}
return BlankTopic()
}
// TODO: Log weird cache errors?
func (s *DefaultTopicStore) Get(id int) (topic *Topic, err error) {
topic, err = s.cache.Get(id)
if err == nil {
return topic, nil
}
topic, err = s.BypassGet(id)
if err == nil {
_ = s.cache.Set(topic)
}
return topic, err
}
// BypassGet will always bypass the cache and pull the topic directly from the database
func (s *DefaultTopicStore) BypassGet(id int) (*Topic, error) {
t := &Topic{ID: id}
err := s.get.QueryRow(id).Scan(&t.Title, &t.Content, &t.CreatedBy, &t.CreatedAt, &t.LastReplyBy, &t.LastReplyAt, &t.LastReplyID, &t.IsClosed, &t.Sticky, &t.ParentID, &t.IP, &t.ViewCount, &t.PostCount, &t.LikeCount, &t.AttachCount, &t.Poll, &t.Data)
if err == nil {
t.Link = BuildTopicURL(NameToSlug(t.Title), id)
}
return t, err
}
// TODO: Avoid duplicating much of this logic from user_store.go
func (s *DefaultTopicStore) BulkGetMap(ids []int) (list map[int]*Topic, err error) {
idCount := len(ids)
list = make(map[int]*Topic)
if idCount == 0 {
return list, nil
}
var stillHere []int
sliceList := s.cache.BulkGet(ids)
if len(sliceList) > 0 {
for i, sliceItem := range sliceList {
if sliceItem != nil {
list[sliceItem.ID] = sliceItem
} else {
stillHere = append(stillHere, ids[i])
}
}
ids = stillHere
}
// If every user is in the cache, then return immediately
if len(ids) == 0 {
return list, nil
} else if len(ids) == 1 {
topic, err := s.Get(ids[0])
if err != nil {
return list, err
}
list[topic.ID] = topic
return list, nil
}
// TODO: Add a function for the qlist stuff
var q string
idList := make([]interface{},len(ids))
for i, id := range ids {
idList[i] = strconv.Itoa(id)
q += "?,"
}
q = q[0 : len(q)-1]
rows, err := qgen.NewAcc().Select("topics").Columns("tid,title,content,createdBy,createdAt,lastReplyBy,lastReplyAt,lastReplyID,is_closed,sticky,parentID,ipaddress,views,postCount,likeCount,attachCount,poll,data").Where("tid IN(" + q + ")").Query(idList...)
if err != nil {
return list, err
}
defer rows.Close()
for rows.Next() {
t := &Topic{}
err := rows.Scan(&t.ID, &t.Title, &t.Content, &t.CreatedBy, &t.CreatedAt, &t.LastReplyBy, &t.LastReplyAt, &t.LastReplyID, &t.IsClosed, &t.Sticky, &t.ParentID, &t.IP, &t.ViewCount, &t.PostCount, &t.LikeCount, &t.AttachCount, &t.Poll, &t.Data)
if err != nil {
return list, err
}
t.Link = BuildTopicURL(NameToSlug(t.Title), t.ID)
s.cache.Set(t)
list[t.ID] = t
}
err = rows.Err()
if err != nil {
return list, err
}
// Did we miss any topics?
if idCount > len(list) {
var sidList string
for _, id := range ids {
_, ok := list[id]
if !ok {
sidList += strconv.Itoa(id) + ","
}
}
if sidList != "" {
sidList = sidList[0 : len(sidList)-1]
err = errors.New("Unable to find topics with the following IDs: " + sidList)
}
}
return list, err
}
func (s *DefaultTopicStore) Reload(id int) error {
topic, err := s.BypassGet(id)
if err == nil {
_ = s.cache.Set(topic)
} else {
_ = s.cache.Remove(id)
}
TopicListThaw.Thaw()
return err
}
func (s *DefaultTopicStore) Exists(id int) bool {
return s.exists.QueryRow(id).Scan(&id) == nil
}
func (s *DefaultTopicStore) Create(fid int, topicName string, content string, uid int, ipaddress string) (tid int, err error) {
if topicName == "" {
return 0, ErrNoTitle
}
// ? This number might be a little screwy with Unicode, but it's the only consistent thing we have, as Unicode characters can be any number of bytes in theory?
if len(topicName) > Config.MaxTopicTitleLength {
return 0, ErrLongTitle
}
parsedContent := strings.TrimSpace(ParseMessage(content, fid, "forums"))
if parsedContent == "" {
return 0, ErrNoBody
}
wcount := WordCount(content)
// TODO: Move this statement into the topic store
res, err := s.create.Exec(fid, topicName, content, parsedContent, uid, ipaddress, wcount, uid)
if err != nil {
return 0, err
}
lastID, err := res.LastInsertId()
if err != nil {
return 0, err
}
return int(lastID), Forums.AddTopic(int(lastID), uid, fid)
}
// ? - What is this? Do we need it? Should it be in the main store interface?
func (s *DefaultTopicStore) AddLastTopic(item *Topic, fid int) error {
// Coming Soon...
return nil
}
// Count returns the total number of topics on these forums
func (s *DefaultTopicStore) Count() (count int) {
err := s.count.QueryRow().Scan(&count)
if err != nil {
LogError(err)
}
return count
}
func (s *DefaultTopicStore) SetCache(cache TopicCache) {
s.cache = cache
}
// TODO: We're temporarily doing this so that you can do tcache != nil in getTopicUser. Refactor it.
func (s *DefaultTopicStore) GetCache() TopicCache {
_, ok := s.cache.(*NullTopicCache)
if ok {
return nil
}
return s.cache
}