splitted one operator module to file, account, image operators; splitted operator functions; etc

app/fileoper/getfile.go

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ *
+ * This work is published and licensed under a Creative Commons
+ * Attribution-NonCommercial-NoDerivatives 4.0 International License.
+ *
+ * Distribution of this work is permitted, but commercial use and
+ * modifications are strictly prohibited.
+ */
+package fileoper
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"path"
+	"strconv"
+)
+
+// GetFile
+type GetFileParams struct {
+	Filepath string
+}
+type GetFileResult struct {
+	ContentType   string
+	ContentSize   string
+	ContentDigest string
+	Source        io.ReadCloser
+
+	ContentCreatedAt string
+	ContentCreatedBy string
+	ContentUpdatedAt string
+	ContentUpdatedBy string
+}
+
+func (oper *Operator) GetFile(ctx context.Context, operatorID string, params *GetFileParams) (int, *GetFileResult, error) {
+	var err error
+	res := &GetFileResult{}
+
+	xfilepath, err := cleanFilepath(params.Filepath)
+	if err != nil {
+		code := http.StatusInternalServerError
+		return code, res, err
+	}
+	filename := path.Base(xfilepath)
+	collection := path.Dir(xfilepath)
+
+	resName := params.Filepath
+	oper.iLock.WaitAndLock(resName)
+	defer oper.iLock.Done(resName)
+
+	descrExists, fileDescr, err := oper.mdb.GetFileByCollectionName(ctx, collection, filename)
+	if err != nil {
+		code := http.StatusInternalServerError
+		return code, res, err
+	}
+	if !descrExists {
+		code := http.StatusNotFound
+		return code, res, err
+	}
+	reader, err := oper.store.GetFileReader(collection, filename)
+	if err != nil {
+		code := http.StatusInternalServerError
+		return code, res, err
+	}
+	res = &GetFileResult{
+		ContentSize:   strconv.FormatInt(fileDescr.Size, 10),
+		ContentType:   fileDescr.Type,
+		ContentDigest: fileDescr.Checksum,
+		Source:        reader,
+
+		ContentCreatedAt: fileDescr.CreatedAt,
+		ContentCreatedBy: fileDescr.CreatedBy,
+		ContentUpdatedAt: fileDescr.UpdatedAt,
+		ContentUpdatedBy: fileDescr.UpdatedBy,
+	}
+	code := http.StatusOK
+	return code, res, err
+}