gosora/common/forum_perms_store.go

212 lines
4.9 KiB
Go

package common
import (
"database/sql"
"encoding/json"
"sync"
"../query_gen/lib"
)
var FPStore ForumPermsStore
type ForumPermsStore interface {
Init() error
GetAllMap() (bigMap map[int]map[int]*ForumPerms)
Get(fid int, gid int) (fperms *ForumPerms, err error)
GetCopy(fid int, gid int) (fperms ForumPerms, err error)
ReloadAll() error
Reload(id int) error
}
type ForumPermsCache interface {
}
type MemoryForumPermsStore struct {
getByForum *sql.Stmt
getByForumGroup *sql.Stmt
evenForums map[int]map[int]*ForumPerms
oddForums map[int]map[int]*ForumPerms // [fid][gid]*ForumPerms
evenLock sync.RWMutex
oddLock sync.RWMutex
}
func NewMemoryForumPermsStore() (*MemoryForumPermsStore, error) {
acc := qgen.Builder.Accumulator()
return &MemoryForumPermsStore{
getByForum: acc.Select("forums_permissions").Columns("gid, permissions").Where("fid = ?").Orderby("gid ASC").Prepare(),
getByForumGroup: acc.Select("forums_permissions").Columns("permissions").Where("fid = ? AND gid = ?").Prepare(),
evenForums: make(map[int]map[int]*ForumPerms),
oddForums: make(map[int]map[int]*ForumPerms),
}, acc.FirstError()
}
func (fps *MemoryForumPermsStore) Init() error {
DebugLog("Initialising the forum perms store")
return fps.ReloadAll()
}
func (fps *MemoryForumPermsStore) ReloadAll() error {
DebugLog("Reloading the forum perms")
fids, err := Forums.GetAllIDs()
if err != nil {
return err
}
for _, fid := range fids {
err := fps.Reload(fid)
if err != nil {
return err
}
}
return nil
}
func (fps *MemoryForumPermsStore) parseForumPerm(perms []byte) (pperms *ForumPerms, err error) {
DebugDetail("perms: ", string(perms))
pperms = BlankForumPerms()
err = json.Unmarshal(perms, &pperms)
pperms.ExtData = make(map[string]bool)
pperms.Overrides = true
return pperms, err
}
// TODO: Need a more thread-safe way of doing this. Possibly with sync.Map?
func (fps *MemoryForumPermsStore) Reload(fid int) error {
DebugLogf("Reloading the forum permissions for forum #%d", fid)
rows, err := fps.getByForum.Query(fid)
if err != nil {
return err
}
defer rows.Close()
var forumPerms = make(map[int]*ForumPerms)
for rows.Next() {
var gid int
var perms []byte
err := rows.Scan(&gid, &perms)
if err != nil {
return err
}
pperms, err := fps.parseForumPerm(perms)
if err != nil {
return err
}
forumPerms[gid] = pperms
}
DebugLogf("forumPerms: %+v\n", forumPerms)
if fid%2 == 0 {
fps.evenLock.Lock()
fps.evenForums[fid] = forumPerms
fps.evenLock.Unlock()
} else {
fps.oddLock.Lock()
fps.oddForums[fid] = forumPerms
fps.oddLock.Unlock()
}
groups, err := Groups.GetAll()
if err != nil {
return err
}
fids, err := Forums.GetAllIDs()
if err != nil {
return err
}
for _, group := range groups {
DebugLogf("Updating the forum permissions for Group #%d", group.ID)
group.CanSee = []int{}
for _, fid := range fids {
DebugDetailf("Forum #%+v\n", fid)
var forumPerms map[int]*ForumPerms
var ok bool
if fid%2 == 0 {
fps.evenLock.RLock()
forumPerms, ok = fps.evenForums[fid]
fps.evenLock.RUnlock()
} else {
fps.oddLock.RLock()
forumPerms, ok = fps.oddForums[fid]
fps.oddLock.RUnlock()
}
var forumPerm *ForumPerms
if !ok {
continue
}
forumPerm, ok = forumPerms[group.ID]
if !ok {
continue
}
if forumPerm.Overrides {
if forumPerm.ViewTopic {
group.CanSee = append(group.CanSee, fid)
}
} else if group.Perms.ViewTopic {
group.CanSee = append(group.CanSee, fid)
}
DebugDetail("group.ID: ", group.ID)
DebugDetailf("forumPerm: %+v\n", forumPerm)
DebugDetail("group.CanSee: ", group.CanSee)
}
DebugDetailf("group.CanSee (length %d): %+v \n", len(group.CanSee), group.CanSee)
}
return nil
}
// ! Throughput on this might be bad due to the excessive locking
func (fps *MemoryForumPermsStore) GetAllMap() (bigMap map[int]map[int]*ForumPerms) {
bigMap = make(map[int]map[int]*ForumPerms)
fps.evenLock.RLock()
for fid, subMap := range fps.evenForums {
bigMap[fid] = subMap
}
fps.evenLock.RUnlock()
fps.oddLock.RLock()
for fid, subMap := range fps.oddForums {
bigMap[fid] = subMap
}
fps.oddLock.RUnlock()
return bigMap
}
// TODO: Add a hook here and have plugin_guilds use it
// TODO: Check if the forum exists?
// TODO: Fix the races
func (fps *MemoryForumPermsStore) Get(fid int, gid int) (fperms *ForumPerms, err error) {
var fmap map[int]*ForumPerms
var ok bool
if fid%2 == 0 {
fps.evenLock.RLock()
fmap, ok = fps.evenForums[fid]
fps.evenLock.RUnlock()
} else {
fps.oddLock.RLock()
fmap, ok = fps.oddForums[fid]
fps.oddLock.RUnlock()
}
if !ok {
return fperms, ErrNoRows
}
fperms, ok = fmap[gid]
if !ok {
return fperms, ErrNoRows
}
return fperms, nil
}
// TODO: Check if the forum exists?
// TODO: Fix the races
func (fps *MemoryForumPermsStore) GetCopy(fid int, gid int) (fperms ForumPerms, err error) {
fPermsPtr, err := fps.Get(fid, gid)
if err != nil {
return fperms, err
}
return *fPermsPtr, nil
}