feat: automatic file organization based on rules, close #28

core/download.go

@@ -31,15 +31,14 @@ func processPendingTask(task *types.Task) error {
 		task.File.FileName = fmt.Sprintf("%d_%d_%s", task.FileChatID, task.FileMessageID, task.File.Hash())
 	}
 
-	if task.StoragePath == "" {
-		task.StoragePath = task.FileName()
-	}
-
-	taskStorage, err := storage.GetStorageByUserIDAndName(task.UserID, task.StorageName)
+	taskStorage, storagePath, err := getStorageAndPathForTask(task)
 	if err != nil {
 		return err
 	}
-	task.StoragePath = taskStorage.JoinStoragePath(*task)
+	if taskStorage == nil {
+		return fmt.Errorf("not found storage: %s", task.StorageName)
+	}
+	task.StoragePath = storagePath
 
 	ctx, ok := task.Ctx.(*ext.Context)
 	if !ok {

core/rule.go

@@ -0,0 +1,103 @@
+package core
+
+import (
+	"fmt"
+	"path"
+	"regexp"
+
+	"github.com/celestix/gotgproto/ext"
+	"github.com/krau/SaveAny-Bot/bot"
+	"github.com/krau/SaveAny-Bot/common"
+	"github.com/krau/SaveAny-Bot/dao"
+	"github.com/krau/SaveAny-Bot/storage"
+	"github.com/krau/SaveAny-Bot/types"
+)
+
+func getStorageAndPathForTask(task *types.Task) (storage.Storage, string, error) {
+	user, err := dao.GetUserByChatID(task.UserID)
+	if err != nil {
+		return nil, "", fmt.Errorf("failed to get user by chat ID: %w", err)
+	}
+	if task.StoragePath == "" {
+		task.StoragePath = task.FileName()
+	}
+	taskStorage, err := storage.GetStorageByUserIDAndName(task.UserID, task.StorageName)
+	if err != nil {
+		return nil, "", err
+	}
+	storagePath := taskStorage.JoinStoragePath(*task)
+	if !user.ApplyRule || user.Rules == nil {
+		return taskStorage, storagePath, nil
+	}
+	var ruleTaskStorage storage.Storage
+	var ruleStoragePath string
+	for _, rule := range user.Rules {
+		matchStorage, matchStoragePath := applyRule(&rule, *task)
+		if matchStorage != nil && matchStoragePath != "" {
+			ruleTaskStorage = matchStorage
+			ruleStoragePath = matchStoragePath
+		}
+	}
+	if ruleStoragePath == "" || ruleTaskStorage == nil {
+		return taskStorage, storagePath, nil
+	}
+	common.Log.Debugf("Rule matched: %s, %s", ruleTaskStorage.Name(), ruleStoragePath)
+	return ruleTaskStorage, ruleStoragePath, nil
+}
+
+func applyRule(rule *dao.Rule, task types.Task) (storage.Storage, string) {
+	var DirPath, StorageName string
+	switch rule.Type {
+	case string(types.RuleTypeFileNameRegex):
+		ruleRegex, err := regexp.Compile(rule.Data)
+		if err != nil {
+			common.Log.Errorf("failed to compile regex: %s", err)
+			return nil, ""
+		}
+		if !ruleRegex.MatchString(task.FileName()) {
+			return nil, ""
+		}
+		DirPath = rule.DirPath
+		StorageName = rule.StorageName
+	case string(types.RuleTypeMessageRegex):
+		ruleRegex, err := regexp.Compile(rule.Data)
+		if err != nil {
+			common.Log.Errorf("failed to compile regex: %s", err)
+			return nil, ""
+		}
+		ctx, ok := task.Ctx.(*ext.Context)
+		if !ok {
+			common.Log.Fatalf("context is not *ext.Context: %T", task.Ctx)
+			return nil, ""
+		}
+		msg, err := bot.GetTGMessage(ctx, task.FileChatID, task.FileMessageID)
+		if err != nil {
+			common.Log.Errorf("failed to get message: %s", err)
+			return nil, ""
+		}
+		if msg == nil {
+			return nil, ""
+		}
+		if !ruleRegex.MatchString(msg.GetMessage()) {
+			return nil, ""
+		}
+		DirPath = rule.DirPath
+		StorageName = rule.StorageName
+	default:
+		common.Log.Errorf("unknown rule type: %s", rule.Type)
+		return nil, ""
+	}
+	taskStorageName := func() string {
+		if StorageName == "" || StorageName == "CHOSEN" {
+			return task.StorageName
+		}
+		return StorageName
+	}()
+	taskStorage, err := storage.GetStorageByUserIDAndName(task.UserID, taskStorageName)
+	if err != nil {
+		common.Log.Errorf("failed to get storage: %s", err)
+		return nil, ""
+	}
+	task.StoragePath = path.Join(DirPath, task.StoragePath)
+	return taskStorage, taskStorage.JoinStoragePath(task)
+}