uploading files and a lot more

routes/files.go

@@ -0,0 +1,194 @@
+package routes
+
+import (
+	"filething/models"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/labstack/echo/v4"
+)
+
+type UploadResponse struct {
+	Usage int64 `json:"usage"`
+	File  File  `json:"file"`
+}
+
+func UploadFile(c echo.Context) error {
+	user := c.Get("user").(*models.User)
+
+	fullPath := strings.Trim(c.Param("*"), "/")
+	basePath := fmt.Sprintf("%s/%s/%s/", os.Getenv("STORAGE_PATH"), user.ID, fullPath)
+
+	currentUsage, err := calculateStorageUsage(basePath)
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+
+	reader, err := c.Request().MultipartReader()
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+
+	part, err := reader.NextPart()
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+
+	filepath := filepath.Join(basePath, part.FileName())
+
+	if _, err = os.Stat(filepath); err == nil {
+		return c.JSON(http.StatusConflict, map[string]string{"message": "File with that name already exists"})
+	}
+
+	dst, err := os.Create(filepath)
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+	defer dst.Close()
+
+	// Read the file manually because otherwise we are limited by the arbitrarily small size of /tmp
+	buffer := make([]byte, 4096)
+	totalSize := int64(0)
+
+	for {
+		n, readErr := part.Read(buffer)
+
+		if readErr != nil && readErr == io.ErrUnexpectedEOF {
+			dst.Close()
+			os.Remove(filepath)
+			return c.JSON(http.StatusRequestTimeout, map[string]string{"message": "Upload canceled"})
+		}
+
+		if readErr != nil && readErr != io.EOF {
+			fmt.Println(err)
+			return readErr
+		}
+
+		totalSize += int64(n)
+
+		if currentUsage+totalSize > user.Plan.MaxStorage {
+			dst.Close()
+			os.Remove(filepath)
+			return c.JSON(http.StatusInsufficientStorage, map[string]string{"message": "Insufficient storage space"})
+		}
+
+		if _, err := dst.Write(buffer[:n]); err != nil {
+			fmt.Println(err)
+			return err
+		}
+
+		if n == 0 || readErr == io.EOF {
+			entry, err := os.Stat(filepath)
+
+			if err != nil {
+				fmt.Println(err)
+				return err
+			}
+
+			uploadFile := &UploadResponse{
+				Usage: currentUsage + totalSize,
+				File: File{
+					Name:         entry.Name(),
+					IsDir:        entry.IsDir(),
+					Size:         entry.Size(),
+					LastModified: entry.ModTime().Format("1/2/2006"),
+				},
+			}
+
+			return c.JSON(http.StatusOK, uploadFile)
+		}
+	}
+}
+
+func calculateStorageUsage(basePath string) (int64, error) {
+	var totalSize int64
+
+	// Read the directory
+	entries, err := os.ReadDir(basePath)
+	if err != nil {
+		return 0, err
+	}
+
+	// Iterate over directory entries
+	for _, entry := range entries {
+		if entry.IsDir() {
+			// Recursively calculate size of directories
+			dirPath := filepath.Join(basePath, entry.Name())
+			dirSize, err := calculateStorageUsage(dirPath)
+			if err != nil {
+				return 0, err
+			}
+			totalSize += dirSize
+		} else {
+			// Calculate size of file
+			_ = filepath.Join(basePath, entry.Name())
+			fileInfo, err := entry.Info()
+			if err != nil {
+				return 0, err
+			}
+			totalSize += fileInfo.Size()
+		}
+	}
+
+	return totalSize, nil
+}
+
+type File struct {
+	Name         string `json:"name"`
+	IsDir        bool   `json:"is_dir"`
+	Size         int64  `json:"size"`
+	LastModified string `json:"last_modified"`
+}
+
+func GetFiles(c echo.Context) error {
+	user := c.Get("user").(*models.User)
+
+	fullPath := strings.Trim(c.Param("*"), "/")
+	basePath := fmt.Sprintf("%s/%s/%s/", os.Getenv("STORAGE_PATH"), user.ID, fullPath)
+
+	f, err := os.Open(basePath)
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+
+	files, err := f.Readdir(0)
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+
+	jsonFiles := make([]File, 0)
+
+	for _, f := range files {
+		jsonFiles = append(jsonFiles, File{
+			Name:         f.Name(),
+			IsDir:        f.IsDir(),
+			Size:         f.Size(),
+			LastModified: f.ModTime().Format("1/2/2006"),
+		})
+	}
+
+	return c.JSON(http.StatusOK, jsonFiles)
+}
+
+func GetUsage(c echo.Context) error {
+	user := c.Get("user").(*models.User)
+
+	fullPath := strings.Trim(c.Param("*"), "/")
+	basePath := fmt.Sprintf("%s/%s/%s/", os.Getenv("STORAGE_PATH"), user.ID, fullPath)
+	storageUsage, err := calculateStorageUsage(basePath)
+	if err != nil {
+		return err
+	}
+
+	return c.JSON(http.StatusOK, map[string]int64{"usage": storageUsage})
+}