APIv4 put /posts/{post_id}/patch (#5883)

* APIv4 put /posts/{post_id}/patch

* Add props and edit permission

model/client4.go

@@ -1193,6 +1193,16 @@ func (c *Client4) UpdatePost(postId string, post *Post) (*Post, *Response) {
 	}
 }
 
+// PatchPost partially updates a post. Any missing fields are not updated.
+func (c *Client4) PatchPost(postId string, patch *PostPatch) (*Post, *Response) {
+	if r, err := c.DoApiPut(c.GetPostRoute(postId)+"/patch", patch.ToJson()); err != nil {
+		return nil, &Response{StatusCode: r.StatusCode, Error: err}
+	} else {
+		defer closeBody(r)
+		return PostFromJson(r.Body), BuildResponse(r)
+	}
+}
+
 // GetPost gets a single post.
 func (c *Client4) GetPost(postId string, etag string) (*Post, *Response) {
 	if r, err := c.DoApiGet(c.GetPostRoute(postId), etag); err != nil {

model/post.go

@@ -54,6 +54,14 @@ type Post struct {
 	HasReactions  bool            `json:"has_reactions,omitempty"`
 }
 
+type PostPatch struct {
+	IsPinned     *bool            `json:"is_pinned"`
+	Message      *string          `json:"message"`
+	Props        *StringInterface `json:"props"`
+	FileIds      *StringArray     `json:"file_ids"`
+	HasReactions *bool            `json:"has_reactions"`
+}
+
 func (o *Post) ToJson() string {
 	b, err := json.Marshal(o)
 	if err != nil {
@@ -190,3 +198,45 @@ func (o *Post) AddProp(key string, value interface{}) {
 func (o *Post) IsSystemMessage() bool {
 	return len(o.Type) >= len(POST_SYSTEM_MESSAGE_PREFIX) && o.Type[:len(POST_SYSTEM_MESSAGE_PREFIX)] == POST_SYSTEM_MESSAGE_PREFIX
 }
+
+func (p *Post) Patch(patch *PostPatch) {
+	if patch.IsPinned != nil {
+		p.IsPinned = *patch.IsPinned
+	}
+
+	if patch.Message != nil {
+		p.Message = *patch.Message
+	}
+
+	if patch.Props != nil {
+		p.Props = *patch.Props
+	}
+
+	if patch.FileIds != nil {
+		p.FileIds = *patch.FileIds
+	}
+
+	if patch.HasReactions != nil {
+		p.HasReactions = *patch.HasReactions
+	}
+}
+
+func (o *PostPatch) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	}
+
+	return string(b)
+}
+
+func PostPatchFromJson(data io.Reader) *PostPatch {
+	decoder := json.NewDecoder(data)
+	var post PostPatch
+	err := decoder.Decode(&post)
+	if err != nil {
+		return nil
+	}
+
+	return &post
+}