gosora/topic.go

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2016-12-02 07:38:54 +00:00
package main
//import "fmt"
import "sync"
import "strconv"
import "html/template"
import "database/sql"
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type Topic struct
{
ID int
Title string
Content string
CreatedBy int
Is_Closed bool
Sticky bool
CreatedAt string
LastReplyAt string
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ParentID int
Status string // Deprecated. Marked for removal.
IpAddress string
PostCount int
LikeCount int
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}
type TopicUser struct
{
ID int
Title string
Content string
CreatedBy int
Is_Closed bool
Sticky bool
CreatedAt string
LastReplyAt string
ParentID int
Status string // Deprecated. Marked for removal.
IpAddress string
PostCount int
LikeCount int
CreatedByName string
Group int
Avatar string
Css template.CSS
ContentLines int
Tag string
URL string
URLPrefix string
URLName string
Level int
Liked bool
}
type TopicsRow struct
{
ID int
Title string
Content string
CreatedBy int
Is_Closed bool
Sticky bool
CreatedAt string
LastReplyAt string
ParentID int
Status string // Deprecated. Marked for removal.
IpAddress string
PostCount int
LikeCount int
CreatedByName string
Avatar string
Css template.CSS
ContentLines int
Tag string
URL string
URLPrefix string
URLName string
Level int
ForumName string //TopicsRow
}
type TopicStore interface {
Load(id int) error
Get(id int) (*Topic, error)
GetUnsafe(id int) (*Topic, error)
CascadeGet(id int) (*Topic, error)
Set(item *Topic) error
Add(item *Topic) error
AddUnsafe(item *Topic) error
Remove(id int) error
RemoveUnsafe(id int) error
AddLastTopic(item *Topic, fid int) error
GetLength() int
GetCapacity() int
}
type StaticTopicStore struct {
items map[int]*Topic
length int
capacity int
mu sync.RWMutex
}
func NewStaticTopicStore(capacity int) *StaticTopicStore {
return &StaticTopicStore{items:make(map[int]*Topic),capacity:capacity}
}
func (sts *StaticTopicStore) Get(id int) (*Topic, error) {
sts.mu.RLock()
item, ok := sts.items[id]
sts.mu.RUnlock()
if ok {
return item, nil
}
return item, sql.ErrNoRows
}
func (sts *StaticTopicStore) GetUnsafe(id int) (*Topic, error) {
item, ok := sts.items[id]
if ok {
return item, nil
}
return item, sql.ErrNoRows
}
func (sts *StaticTopicStore) CascadeGet(id int) (*Topic, error) {
sts.mu.RLock()
topic, ok := sts.items[id]
sts.mu.RUnlock()
if ok {
return topic, nil
}
topic = &Topic{ID:id}
err := get_topic_stmt.QueryRow(id).Scan(&topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
if err == nil {
sts.Add(topic)
}
return topic, err
}
func (sts *StaticTopicStore) Load(id int) error {
topic := &Topic{ID:id}
err := get_topic_stmt.QueryRow(id).Scan(&topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
if err == nil {
sts.Set(topic)
} else {
sts.Remove(id)
}
return err
}
func (sts *StaticTopicStore) Set(item *Topic) error {
sts.mu.Lock()
_, ok := sts.items[item.ID]
if ok {
sts.items[item.ID] = item
} else if sts.length >= sts.capacity {
sts.mu.Unlock()
return ErrStoreCapacityOverflow
} else {
sts.items[item.ID] = item
sts.length++
}
sts.mu.Unlock()
return nil
}
func (sts *StaticTopicStore) Add(item *Topic) error {
if sts.length >= sts.capacity {
return ErrStoreCapacityOverflow
}
sts.mu.Lock()
sts.items[item.ID] = item
sts.mu.Unlock()
sts.length++
return nil
}
func (sts *StaticTopicStore) AddUnsafe(item *Topic) error {
if sts.length >= sts.capacity {
return ErrStoreCapacityOverflow
}
sts.items[item.ID] = item
sts.length++
return nil
}
func (sts *StaticTopicStore) Remove(id int) error {
sts.mu.Lock()
delete(sts.items,id)
sts.mu.Unlock()
sts.length--
return nil
}
func (sts *StaticTopicStore) RemoveUnsafe(id int) error {
delete(sts.items,id)
sts.length--
return nil
}
func (sts *StaticTopicStore) AddLastTopic(item *Topic, fid int) error {
// Coming Soon...
return nil
}
func (sts *StaticTopicStore) GetLength() int {
return sts.length
}
func (sts *StaticTopicStore) SetCapacity(capacity int) {
sts.capacity = capacity
}
func (sts *StaticTopicStore) GetCapacity() int {
return sts.capacity
}
//type DynamicTopicStore struct {
// items_expiries list.List
// items map[int]*Topic
//}
type SqlTopicStore struct {
}
func NewSqlTopicStore() *SqlTopicStore {
return &SqlTopicStore{}
}
func (sus *SqlTopicStore) Get(id int) (*Topic, error) {
topic := Topic{ID:id}
err := get_topic_stmt.QueryRow(id).Scan(&topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
return &topic, err
}
func (sus *SqlTopicStore) GetUnsafe(id int) (*Topic, error) {
topic := Topic{ID:id}
err := get_topic_stmt.QueryRow(id).Scan(&topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
return &topic, err
}
func (sus *SqlTopicStore) CascadeGet(id int) (*Topic, error) {
topic := Topic{ID:id}
err := get_topic_stmt.QueryRow(id).Scan(&topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
return &topic, err
}
func (sus *SqlTopicStore) Load(id int) error {
topic := Topic{ID:id}
err := get_topic_stmt.QueryRow(id).Scan(&topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
return err
}
// Placeholder methods, the actual queries are done elsewhere
func (sus *SqlTopicStore) Set(item *Topic) error {
return nil
}
func (sus *SqlTopicStore) Add(item *Topic) error {
return nil
}
func (sus *SqlTopicStore) AddUnsafe(item *Topic) error {
return nil
}
func (sus *SqlTopicStore) Remove(id int) error {
return nil
}
func (sus *SqlTopicStore) RemoveUnsafe(id int) error {
return nil
}
func (sts *SqlTopicStore) AddLastTopic(item *Topic, fid int) error {
// Coming Soon...
return nil
}
func (sts *SqlTopicStore) GetCapacity() int {
return 0
}
func (sus *SqlTopicStore) GetLength() int {
// Return the total number of topics on the forums
return 0
}
func get_topicuser(tid int) (TopicUser,error) {
if cache_topicuser != CACHE_SQL {
topic, err := topics.Get(tid)
if err == nil {
user, err := users.CascadeGet(topic.CreatedBy)
if err != nil {
return TopicUser{ID:tid}, err
}
init_user_perms(user)
// We might be better off just passing seperate topic and user structs to the caller?
return copy_topic_to_topicuser(topic, user), nil
} else if users.GetLength() < users.GetCapacity() {
topic, err = topics.CascadeGet(tid)
if err != nil {
return TopicUser{ID:tid}, err
}
user, err := users.CascadeGet(topic.CreatedBy)
if err != nil {
return TopicUser{ID:tid}, err
}
init_user_perms(user)
tu := copy_topic_to_topicuser(topic, user)
return tu, nil
}
}
tu := TopicUser{ID:tid}
err := get_topic_user_stmt.QueryRow(tid).Scan(&tu.Title, &tu.Content, &tu.CreatedBy, &tu.CreatedAt, &tu.Is_Closed, &tu.Sticky, &tu.ParentID, &tu.IpAddress, &tu.PostCount, &tu.LikeCount, &tu.CreatedByName, &tu.Avatar, &tu.Group, &tu.URLPrefix, &tu.URLName, &tu.Level)
the_topic := Topic{ID:tu.ID, Title:tu.Title, Content:tu.Content, CreatedBy:tu.CreatedBy, Is_Closed:tu.Is_Closed, Sticky:tu.Sticky, CreatedAt:tu.CreatedAt, LastReplyAt:tu.LastReplyAt, ParentID:tu.ParentID, IpAddress:tu.IpAddress, PostCount:tu.PostCount, LikeCount:tu.LikeCount}
//fmt.Printf("%+v\n", the_topic)
tu.Tag = groups[tu.Group].Tag
topics.Add(&the_topic)
//err = errors.Error("Loaded data via query")
return tu, err
}
func copy_topic_to_topicuser(topic *Topic, user *User) (tu TopicUser) {
tu.CreatedByName = user.Name
tu.Group = user.Group
tu.Avatar = user.Avatar
tu.URLPrefix = user.URLPrefix
tu.URLName = user.URLName
tu.Level = user.Level
tu.ID = topic.ID
tu.Title = topic.Title
tu.Content = topic.Content
tu.CreatedBy = topic.CreatedBy
tu.Is_Closed = topic.Is_Closed
tu.Sticky = topic.Sticky
tu.CreatedAt = topic.CreatedAt
tu.LastReplyAt = topic.LastReplyAt
tu.ParentID = topic.ParentID
tu.IpAddress = topic.IpAddress
tu.PostCount = topic.PostCount
tu.LikeCount = topic.LikeCount
return tu
}
func get_topic_by_reply(rid int) (*Topic, error) {
topic := Topic{ID:0}
err := get_topic_by_reply_stmt.QueryRow(rid).Scan(&topic.ID, &topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.Is_Closed, &topic.Sticky, &topic.ParentID, &topic.IpAddress, &topic.PostCount, &topic.LikeCount)
return &topic, err
}
func build_topic_url(tid int) string {
return "/topic/" + strconv.Itoa(tid)
}