gosora/common/conversations.go

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package common
import (
"errors"
"time"
//"log"
"strconv"
"database/sql"
qgen "github.com/Azareal/Gosora/query_gen"
)
var Convos ConversationStore
var convoStmts ConvoStmts
type ConvoStmts struct {
fetchPost *sql.Stmt
getPosts *sql.Stmt
countPosts *sql.Stmt
edit *sql.Stmt
create *sql.Stmt
delete *sql.Stmt
has *sql.Stmt
editPost *sql.Stmt
createPost *sql.Stmt
deletePost *sql.Stmt
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getUsers *sql.Stmt
}
func init() {
DbInits.Add(func(acc *qgen.Accumulator) error {
cpo := "conversations_posts"
convoStmts = ConvoStmts{
fetchPost: acc.Select(cpo).Columns("cid,body,post,createdBy").Where("pid=?").Prepare(),
getPosts: acc.Select(cpo).Columns("pid,body,post,createdBy").Where("cid=?").Limit("?,?").Prepare(),
countPosts: acc.Count(cpo).Where("cid=?").Prepare(),
edit: acc.Update("conversations").Set("lastReplyBy=?,lastReplyAt=?").Where("cid=?").Prepare(),
create: acc.Insert("conversations").Columns("createdAt,lastReplyAt").Fields("UTC_TIMESTAMP(),UTC_TIMESTAMP()").Prepare(),
has: acc.Count("conversations_participants").Where("uid=? AND cid=?").Prepare(),
editPost: acc.Update(cpo).Set("body=?,post=?").Where("pid=?").Prepare(),
createPost: acc.Insert(cpo).Columns("cid,body,post,createdBy").Fields("?,?,?,?").Prepare(),
deletePost: acc.Delete(cpo).Where("pid=?").Prepare(),
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getUsers: acc.Select("conversations_participants").Columns("uid").Where("cid = ?").Prepare(),
}
return acc.FirstError()
})
}
type Conversation struct {
ID int
CreatedBy int
CreatedAt time.Time
LastReplyBy int
LastReplyAt time.Time
}
func (co *Conversation) Posts(offset, itemsPerPage int) (posts []*ConversationPost, err error) {
rows, err := convoStmts.getPosts.Query(co.ID, offset, itemsPerPage)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
p := &ConversationPost{CID: co.ID}
err := rows.Scan(&p.ID, &p.Body, &p.Post, &p.CreatedBy)
if err != nil {
return nil, err
}
p, err = ConvoPostProcess.OnLoad(p)
if err != nil {
return nil, err
}
posts = append(posts, p)
}
return posts, rows.Err()
}
func (co *Conversation) PostsCount() (count int) {
err := convoStmts.countPosts.QueryRow(co.ID).Scan(&count)
if err != nil {
LogError(err)
}
return count
}
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func (co *Conversation) Uids() (ids []int, err error) {
rows, err := convoStmts.getUsers.Query(co.ID)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var id int
err := rows.Scan(&id)
if err != nil {
return nil, err
}
ids = append(ids, id)
}
return ids, rows.Err()
}
func (co *Conversation) Has(uid int) (in bool) {
var count int
err := convoStmts.has.QueryRow(uid, co.ID).Scan(&count)
if err != nil {
LogError(err)
}
return count > 0
}
func (co *Conversation) Update() error {
_, err := convoStmts.edit.Exec(co.CreatedAt, co.LastReplyBy, co.LastReplyAt, co.ID)
return err
}
func (co *Conversation) Create() (int, error) {
res, err := convoStmts.create.Exec()
if err != nil {
return 0, err
}
lastID, err := res.LastInsertId()
return int(lastID), err
}
type ConversationExtra struct {
*Conversation
Users []*User
}
type ConversationStore interface {
Get(id int) (*Conversation, error)
GetUser(uid, offset int) (cos []*Conversation, err error)
GetUserExtra(uid int, offset int) (cos []*ConversationExtra, err error)
GetUserCount(uid int) (count int)
Delete(id int) error
Count() (count int)
Create(content string, createdBy int, participants []int) (int, error)
}
type DefaultConversationStore struct {
get *sql.Stmt
getUser *sql.Stmt
getUserCount *sql.Stmt
delete *sql.Stmt
deletePosts *sql.Stmt
deleteParticipants *sql.Stmt
create *sql.Stmt
addParticipant *sql.Stmt
count *sql.Stmt
}
func NewDefaultConversationStore(acc *qgen.Accumulator) (*DefaultConversationStore, error) {
return &DefaultConversationStore{
get: acc.Select("conversations").Columns("createdBy, createdAt, lastReplyBy, lastReplyAt").Where("cid=?").Prepare(),
getUser: acc.SimpleInnerJoin("conversations_participants AS cp", "conversations AS c", "cp.cid, c.createdBy, c.createdAt, c.lastReplyBy, c.lastReplyAt", "cp.cid=c.cid", "cp.uid=?", "c.lastReplyAt DESC, c.createdAt DESC, c.cid DESC", "?,?"),
getUserCount: acc.Count("conversations_participants").Where("uid=?").Prepare(),
delete: acc.Delete("conversations").Where("cid=?").Prepare(),
deletePosts: acc.Delete("conversations_posts").Where("cid=?").Prepare(),
deleteParticipants: acc.Delete("conversations_participants").Where("cid=?").Prepare(),
create: acc.Insert("conversations").Columns("createdBy, createdAt, lastReplyAt").Fields("?,UTC_TIMESTAMP(),UTC_TIMESTAMP()").Prepare(),
addParticipant: acc.Insert("conversations_participants").Columns("uid, cid").Fields("?,?").Prepare(),
count: acc.Count("conversations").Prepare(),
}, acc.FirstError()
}
func (s *DefaultConversationStore) Get(id int) (*Conversation, error) {
co := &Conversation{ID: id}
err := s.get.QueryRow(id).Scan(&co.CreatedBy, &co.CreatedAt, &co.LastReplyBy, &co.LastReplyAt)
return co, err
}
func (s *DefaultConversationStore) GetUser(uid, offset int) (cos []*Conversation, err error) {
rows, err := s.getUser.Query(uid, offset, Config.ItemsPerPage)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
co := &Conversation{}
err := rows.Scan(&co.ID, &co.CreatedBy, &co.CreatedAt, &co.LastReplyBy, &co.LastReplyAt)
if err != nil {
return nil, err
}
cos = append(cos, co)
}
return cos, rows.Err()
}
func (s *DefaultConversationStore) GetUserExtra(uid, offset int) (cos []*ConversationExtra, err error) {
raw, err := s.GetUser(uid, offset)
if err != nil {
return nil, err
}
//log.Printf("raw: %+v\n", raw)
if len(raw) == 0 {
//log.Println("r0")
return nil, sql.ErrNoRows
}
if len(raw) == 1 {
//log.Print("r0b2")
uids, err := raw[0].Uids()
if err != nil {
return nil, err
}
//log.Println("r1b2")
umap, err := Users.BulkGetMap(uids)
if err != nil {
return nil, err
}
//log.Println("r2b2")
users := make([]*User,len(umap))
var i int
for _, user := range umap {
users[i] = user
i++
}
return []*ConversationExtra{&ConversationExtra{raw[0],users}}, nil
}
//log.Println("1")
cmap := make(map[int]*ConversationExtra,len(raw))
for _, co := range raw {
cmap[co.ID] = &ConversationExtra{co,nil}
}
// TODO: Add a function for the q stuff
var q string
idList := make([]interface{},len(raw))
for i, co := range raw {
idList[i] = strconv.Itoa(co.ID)
q += "?,"
}
q = q[0 : len(q)-1]
rows, err := qgen.NewAcc().Select("conversations_participants").Columns("uid,cid").Where("cid IN(" + q + ")").Query(idList...)
if err != nil {
return nil, err
}
defer rows.Close()
//log.Println("2")
idmap := make(map[int][]int) // cid: []uid
puidmap := make(map[int]struct{})
for rows.Next() {
var uid, cid int
err := rows.Scan(&uid, &cid)
if err != nil {
return nil, err
}
idmap[cid] = append(idmap[cid],uid)
puidmap[uid] = struct{}{}
}
if err = rows.Err(); err != nil {
return nil, err
}
//log.Println("3")
//log.Printf("idmap: %+v\n", idmap)
//log.Printf("puidmap: %+v\n",puidmap)
puids := make([]int,len(puidmap))
var i int
for puid, _ := range puidmap {
puids[i] = puid
i++
}
umap, err := Users.BulkGetMap(puids)
if err != nil {
return nil, err
}
//log.Println("4")
//log.Printf("umap: %+v\n", umap)
for cid, uids := range idmap {
co := cmap[cid]
for _, uid := range uids {
co.Users = append(co.Users,umap[uid])
}
//log.Printf("co.Conversation: %+v\n", co.Conversation)
//log.Printf("co.Users: %+v\n", co.Users)
cmap[cid] = co
}
//log.Printf("cmap: %+v\n", cmap)
for _, ra := range raw {
cos = append(cos,cmap[ra.ID])
}
//log.Printf("cos: %+v\n", cos)
return cos, rows.Err()
}
func (s *DefaultConversationStore) GetUserCount(uid int) (count int) {
err := s.getUserCount.QueryRow(uid).Scan(&count)
if err != nil {
LogError(err)
}
return count
}
// TODO: Use a foreign key or transaction
func (s *DefaultConversationStore) Delete(id int) error {
_, err := s.delete.Exec(id)
if err != nil {
return err
}
_, err = s.deletePosts.Exec(id)
if err != nil {
return err
}
_, err = s.deleteParticipants.Exec(id)
return err
}
func (s *DefaultConversationStore) Create(content string, createdBy int, participants []int) (int, error) {
if len(participants) == 0 {
return 0, errors.New("no participants set")
}
res, err := s.create.Exec(createdBy)
if err != nil {
return 0, err
}
lastID, err := res.LastInsertId()
if err != nil {
return 0, err
}
post := &ConversationPost{CID: int(lastID), Body: content, CreatedBy: createdBy}
_, err = post.Create()
if err != nil {
return 0, err
}
for _, p := range participants {
_, err := s.addParticipant.Exec(p, lastID)
if err != nil {
return 0, err
}
}
_, err = s.addParticipant.Exec(createdBy, lastID)
if err != nil {
return 0, err
}
return int(lastID), err
}
// Count returns the total number of topics on these forums
func (s *DefaultConversationStore) Count() (count int) {
err := s.count.QueryRow().Scan(&count)
if err != nil {
LogError(err)
}
return count
}