func getPostsByUserAction(u *User, action string, start, count int) ([]*Post, error) {
var (
err error
actions []UserAction
posts []*Post
)
err = db.Where("user_id=? and action=?", u.Id, action).Offset(start).Limit(count).Find(&actions).Error
if err != nil {
if err == gorm.RecordNotFound {
return []*Post{}, nil
}
return []*Post{}, err
}
for _, a := range actions {
var p = new(Post)
p.Id = a.TargetId
err = db.Find(p).Error
if err != nil {
glog.Error("Find Post by Id %s failed: %s\n", p.Id, err.Error())
continue
}
posts = append(posts, p)
}
return posts, nil
}
/*
创建文章：
POST /api/topic/{id}
1 post的body是一个json结构体，post从这个结构体unmarshal得到
2 post的类别信息也在这个结构体中，字段设置如下：
taxonomy string
name string
或者：
tax_id string
*/
func createNewTopic(c *gin.Context) {
if c.Request.Method != "POST" {
c.JSON(200, RespResult{ErrCodeInvalidMethod, "invalid method, should be post", nil})
return
}
user := getCurrent(c)
if user == nil {
c.JSON(200, RespResult{ErrCodeNeedLogin, "need login", nil})
return
}
// read request post body
defer c.Request.Body.Close()
body, err := ioutil.ReadAll(c.Request.Body)
if err != nil {
c.JSON(200, RespResult{ErrCodeReadRequest, err.Error(), nil})
return
}
// read post from body
post, err := readPostFromRequest(body)
if err != nil {
return
}
id := c.Param("id")
if post.Id != id {
c.JSON(200, RespResult{ErrCodeParam, "post id not equal with path param id", nil})
return
}
if post.AuthorId != "" {
if user.Id != post.AuthorId {
c.JSON(200, RespResult{ErrCodeNeeAuthen, "you have no permission", nil})
return
}
} else {
post.AuthorId = user.Id
post.AuthorName = user.Name
}
tax, _ := readTaxFromRequest(body)
if err := createPost(post, user); err != nil {
c.JSON(200, RespResult{ErrCodeDBQuery, err.Error(), nil})
return
} else {
// 保存post与taxnomy的关系
err = setPostTaxonmoy(post, tax)
if err != nil {
glog.Error("set post-taxonomy failed: post id %s\n", post.Id)
}
}
c.JSON(200, RespResult{0, "ok", nil})
}
// 根据用户名查找用户
//
func getUserByName(name string) *User {
var u User
if err := db.Where("name=?", name).First(&u).Error; err != nil {
if err != gorm.RecordNotFound {
glog.Error("getUserByName failed: name=%s err=%v\n", name, err)
}
return nil
}
return &u
}
func getUserByEmail(email string) (*User, error) {
var u User
if err := db.Where("email=?", email).First(&u).Error; err != nil {
if err != gorm.RecordNotFound {
glog.Error("getUserByEmail failed: email=%s err=%v\n", email, err)
}
return nil, err
}
return &u, nil
}
// 根据ObjectId来查找用户
func getUserById(oid string) *User {
var u User
if err := db.Where("id=?", oid).First(&u).Error; err != nil {
if err != gorm.RecordNotFound {
glog.Error("getUserById failed: oid=%s err=%v\n", oid, err)
}
return nil
}
return &u
}
func getTopicByPoint(c *gin.Context, point string) {
start := getQueryIntDefault(c, "start", 0)
count := getQueryIntDefault(c, "count", 20)
posts, ret, err := getPostsByPoint(point, start, count)
if ret != 0 {
glog.Error("getPostsByPoint failed: point=%s ret=%d err=%s\n", point, ret, err.Error())
c.JSON(200, RespResult{ret, "get post by " + point + " failed: " + err.Error(), nil})
return
}
c.JSON(200, RespResult{0, "ok", posts})
}
func readTaxFromRequest(body []byte) ([]*Taxonomy, error) {
var (
taxes []*Taxonomy
taxInfo CategoryInfo
)
if err := json.Unmarshal(body, &taxInfo); err != nil {
glog.Error("unmarshal categroy info failed: %s %s\n", err.Error(), string(body))
taxes = []*Taxonomy{&UnCategory}
} else {
//glog.Info("category info: %v %s\n", taxInfo, string(body))
taxes = getTaxFromInfos(taxInfo.Infoes)
}
return taxes, nil
}
// 创建回复
func createReply(reply *Post, post *Post, user *User) (err error) {
setPostDefaultValue(reply)
reply.PostParent = post.Id
reply.AuthorId = user.Id
reply.AuthorName = user.Name
err = db.Create(reply).Error
if err == nil {
post.ReplyCount += 1
post.LastReplyAt = time.Now()
if err2 := db.Save(post).Error; err2 != nil {
glog.Error("update post %s reply info failed, reply id: %s\n", post.Id, reply.Id)
}
} else {
return err
}
return
}
// 删除post
func deletePost(post *Post, user *User, delReplies bool) (err error) {
if user.Id == "administrator" {
user.parseUserCap()
}
if post.AuthorId != user.Id && user.capability["delete_others_posts"] == false {
err = errors.New("need perm")
return
}
//db.LogMode(true)
if delReplies {
err = db.Where("post_parent=? AND sub_type=?", post.Id, "reply").Delete(&Post{}).Error
if err != nil {
glog.Error("delete post %d replies failed: %v\n", post.Id, err)
}
}
err = db.Delete(post).Error
//db.LogMode(false)
return
}
// 设置post的分类
func setPostTaxonmoy(post *Post, taxes []*Taxonomy) error {
var (
tr TermRelation
now = time.Now()
err error
)
for _, tax := range taxes {
tr = TermRelation{
ObjectId: post.Id,
TermId: tax.Id,
CreatedAt: now,
}
err = db.Create(&tr).Error
if err != nil {
glog.Error("set post %s to taxonomy %s (%s %s) failed: %s\n",
post.Id, tax.Id, tax.Name)
}
}
return err
}
// 从[]TaxInfo中查找对应的Taxonomy, 并去重
func getTaxFromInfos(infos []TaxInfo) []*Taxonomy {
var (
err error
tax *Taxonomy
taxesMap = make(map[*Taxonomy]struct{})
taxes = []*Taxonomy{}
)
for _, taxInfo := range infos {
//首先根据tax_id来查找
if taxInfo.TaxId != "" {
if taxInfo.TaxId == "0" {
tax = &UnCategory
} else {
tax = getTaxById(taxInfo.TaxId)
}
taxesMap[tax] = struct{}{}
} else {
// 根据taxonomy和name来查找
tax, err = getTaxByName(taxInfo.TaxName, taxInfo.Taxonomy)
if err != nil {
glog.Error("Not found category by name %s taxonomy %s\n",
taxInfo.TaxName, taxInfo.Taxonomy)
} else {
taxesMap[tax] = struct{}{}
}
}
}
// 使用map来过滤可能出现的重复taxonomy问题
for key, _ := range taxesMap {
taxes = append(taxes, key)
}
// 如果没有找到任何分类，设置为未分类
if len(taxes) == 0 {
taxes = []*Taxonomy{&UnCategory}
}
return taxes
}