Enha: db chat management

session.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"elefant/models"
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+var (
+	chatMap = make(map[string]*models.Chat)
+)
+
+func historyToSJSON(msgs []models.MessagesStory) (string, error) {
+	data, err := json.Marshal(msgs)
+	if err != nil {
+		return "", err
+	}
+	if data == nil {
+		return "", fmt.Errorf("nil data")
+	}
+	return string(data), nil
+}
+
+func updateStorageChat(name string, msgs []models.MessagesStory) error {
+	var err error
+	chat, ok := chatMap[name]
+	if !ok {
+		err = fmt.Errorf("failed to find active chat; map:%v; key:%s", chatMap, name)
+		logger.Error("failed to find active chat", "map", chatMap, "key", name)
+		return err
+	}
+	chat.Msgs, err = historyToSJSON(msgs)
+	if err != nil {
+		return err
+	}
+	chat.UpdatedAt = time.Now()
+	_, err = store.UpsertChat(chat)
+	return err
+}
+
+func loadHistoryChats() ([]string, error) {
+	chats, err := store.ListChats()
+	if err != nil {
+		return nil, err
+	}
+	resp := []string{}
+	for _, chat := range chats {
+		if chat.Name == "" {
+			chat.Name = fmt.Sprintf("%d_%v", chat.ID, chat.CreatedAt.Unix())
+		}
+		resp = append(resp, chat.Name)
+		chatMap[chat.Name] = &chat
+	}
+	return resp, nil
+}
+
+func loadHistoryChat(chatName string) ([]models.MessagesStory, error) {
+	chat, ok := chatMap[chatName]
+	if !ok {
+		err := fmt.Errorf("failed to read chat")
+		logger.Error("failed to read chat", "name", chatName)
+		return nil, err
+	}
+	activeChatName = chatName
+	return chat.ToHistory()
+}
+
+func loadOldChatOrGetNew() []models.MessagesStory {
+	// find last chat
+	chat, err := store.GetLastChat()
+	newChat := &models.Chat{
+		ID:        0,
+		CreatedAt: time.Now(),
+		UpdatedAt: time.Now(),
+	}
+	newChat.Name = fmt.Sprintf("%d_%v", chat.ID, chat.CreatedAt.Unix())
+	if err != nil {
+		logger.Warn("failed to load history chat", "error", err)
+		activeChatName = newChat.Name
+		chatMap[newChat.Name] = newChat
+		return defaultStarter
+	}
+	history, err := chat.ToHistory()
+	if err != nil {
+		logger.Warn("failed to load history chat", "error", err)
+		activeChatName = newChat.Name
+		chatMap[newChat.Name] = newChat
+		return defaultStarter
+	}
+	return history
+}