first commit

model/post_list.go

@@ -0,0 +1,91 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+type PostList struct {
+	Order []string         `json:"order"`
+	Posts map[string]*Post `json:"posts"`
+}
+
+func (o *PostList) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	} else {
+		return string(b)
+	}
+}
+
+func (o *PostList) MakeNonNil() {
+	if o.Order == nil {
+		o.Order = make([]string, 0)
+	}
+
+	if o.Posts == nil {
+		o.Posts = make(map[string]*Post)
+	}
+
+	for _, v := range o.Posts {
+		v.MakeNonNil()
+	}
+}
+
+func (o *PostList) AddOrder(id string) {
+
+	if o.Order == nil {
+		o.Order = make([]string, 0, 128)
+	}
+
+	o.Order = append(o.Order, id)
+}
+
+func (o *PostList) AddPost(post *Post) {
+
+	if o.Posts == nil {
+		o.Posts = make(map[string]*Post)
+	}
+
+	o.Posts[post.Id] = post
+}
+
+func (o *PostList) Etag() string {
+
+	id := "0"
+	var t int64 = 0
+
+	for _, v := range o.Posts {
+		if v.UpdateAt > t {
+			t = v.UpdateAt
+			id = v.Id
+		}
+	}
+
+	return Etag(id, t)
+}
+
+func (o *PostList) IsChannelId(channelId string) bool {
+	for _, v := range o.Posts {
+		if v.ChannelId != channelId {
+			return false
+		}
+	}
+
+	return true
+}
+
+func PostListFromJson(data io.Reader) *PostList {
+	decoder := json.NewDecoder(data)
+	var o PostList
+	err := decoder.Decode(&o)
+	if err == nil {
+		return &o
+	} else {
+		return nil
+	}
+}