init

app/service/NoteContentHistoryService.go

@@ -0,0 +1,64 @@
+package service
+
+import (
+	"github.com/leanote/leanote/app/info"
+	"github.com/leanote/leanote/app/db"
+//	. "github.com/leanote/leanote/app/lea"
+	"labix.org/v2/mgo/bson"
+//	"time"
+)
+
+// 历史记录
+type NoteContentHistoryService struct {
+}
+
+// 每个历史记录最大值
+var maxSize = 10
+
+// 新建一个note, 不需要添加历史记录
+// 添加历史
+func (this *NoteContentHistoryService) AddHistory(noteId, userId string, eachHistory info.EachHistory) {
+	// 检查是否是空
+	if eachHistory.Content == "" {
+		return
+	}
+	
+	// 先查是否存在历史记录, 没有则添加之
+	history := info.NoteContentHistory{}
+	db.GetByIdAndUserId(db.NoteContentHistories, noteId, userId, &history)
+	if history.NoteId == "" {
+		this.newHistory(noteId, userId, eachHistory)
+	} else {
+		// 判断是否超出 maxSize, 如果超出则pop最后一个, 再push之, 不用那么麻烦, 直接update吧, 虽然影响性能
+		// TODO
+		l := len(history.Histories)
+		if l >= maxSize {
+			history.Histories = history.Histories[l-maxSize:]
+		}
+		newHistory := []info.EachHistory{eachHistory}
+		newHistory = append(newHistory, history.Histories...) // 在开头加了, 最近的在最前
+	  	history.Histories = newHistory 
+		
+		// 更新之
+		db.UpdateByIdAndUserId(db.NoteContentHistories, noteId, userId, history)
+	}
+	return
+}
+
+// 新建历史
+func (this *NoteContentHistoryService) newHistory(noteId, userId string, eachHistory info.EachHistory) {
+	history := info.NoteContentHistory{NoteId: bson.ObjectIdHex(noteId), 
+		UserId: bson.ObjectIdHex(userId), 
+		Histories: []info.EachHistory{eachHistory},
+	}
+	
+	// 保存之
+	db.Insert(db.NoteContentHistories, history) 
+}
+
+// 列表展示
+func (this *NoteContentHistoryService) ListHistories(noteId, userId string) []info.EachHistory {
+	histories := info.NoteContentHistory{}
+	db.GetByIdAndUserId(db.NoteContentHistories, noteId, userId, &histories)
+	return histories.Histories
+}