1 files changed, 63 insertions, 0 deletions
diff --git a/model/channel_count.go b/model/channel_count.go
new file mode 100644
index 000000000..d5daba14e
--- /dev/null
+++ b/model/channel_count.go
@@ -0,0 +1,63 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+import (
+	"crypto/md5"
+	"encoding/json"
+	"fmt"
+	"io"
+	"sort"
+	"strconv"
+)
+
+type ChannelCounts struct {
+	Counts      map[string]int64 `json:"counts"`
+	UpdateTimes map[string]int64 `json:"update_times"`
+}
+
+func (o *ChannelCounts) Etag() string {
+
+	ids := []string{}
+	for id, _ := range o.Counts {
+		ids = append(ids, id)
+	}
+	sort.Strings(ids)
+
+	str := ""
+	for _, id := range ids {
+		str += id + strconv.FormatInt(o.Counts[id], 10)
+	}
+
+	md5Counts := fmt.Sprintf("%x", md5.Sum([]byte(str)))
+
+	var update int64 = 0
+	for _, u := range o.UpdateTimes {
+		if u > update {
+			update = u
+		}
+	}
+
+	return Etag(md5Counts, update)
+}
+
+func (o *ChannelCounts) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	} else {
+		return string(b)
+	}
+}
+
+func ChannelCountsFromJson(data io.Reader) *ChannelCounts {
+	decoder := json.NewDecoder(data)
+	var o ChannelCounts
+	err := decoder.Decode(&o)
+	if err == nil {
+		return &o
+	} else {
+		return nil
+	}
+}