refactor virtual folders

The same virtual folder can now be shared among users and different
folder quota limits for each user are supported.

Fixes #120

httpd/api_folder.go

@@ -0,0 +1,104 @@
+package httpd
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+
+	"github.com/go-chi/render"
+
+	"github.com/drakkan/sftpgo/dataprovider"
+	"github.com/drakkan/sftpgo/vfs"
+)
+
+func getFolders(w http.ResponseWriter, r *http.Request) {
+	var err error
+	limit := 100
+	offset := 0
+	order := dataprovider.OrderASC
+	folderPath := ""
+	if _, ok := r.URL.Query()["limit"]; ok {
+		limit, err = strconv.Atoi(r.URL.Query().Get("limit"))
+		if err != nil {
+			err = errors.New("Invalid limit")
+			sendAPIResponse(w, r, err, "", http.StatusBadRequest)
+			return
+		}
+		if limit > 500 {
+			limit = 500
+		}
+	}
+	if _, ok := r.URL.Query()["offset"]; ok {
+		offset, err = strconv.Atoi(r.URL.Query().Get("offset"))
+		if err != nil {
+			err = errors.New("Invalid offset")
+			sendAPIResponse(w, r, err, "", http.StatusBadRequest)
+			return
+		}
+	}
+	if _, ok := r.URL.Query()["order"]; ok {
+		order = r.URL.Query().Get("order")
+		if order != dataprovider.OrderASC && order != dataprovider.OrderDESC {
+			err = errors.New("Invalid order")
+			sendAPIResponse(w, r, err, "", http.StatusBadRequest)
+			return
+		}
+	}
+	if _, ok := r.URL.Query()["folder_path"]; ok {
+		folderPath = r.URL.Query().Get("folder_path")
+	}
+	folders, err := dataprovider.GetFolders(dataProvider, limit, offset, order, folderPath)
+	if err == nil {
+		render.JSON(w, r, folders)
+	} else {
+		sendAPIResponse(w, r, err, "", http.StatusInternalServerError)
+	}
+}
+
+func addFolder(w http.ResponseWriter, r *http.Request) {
+	r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
+	var folder vfs.BaseVirtualFolder
+	err := render.DecodeJSON(r.Body, &folder)
+	if err != nil {
+		sendAPIResponse(w, r, err, "", http.StatusBadRequest)
+		return
+	}
+	err = dataprovider.AddFolder(dataProvider, folder)
+	if err == nil {
+		folder, err = dataprovider.GetFolderByPath(dataProvider, folder.MappedPath)
+		if err == nil {
+			render.JSON(w, r, folder)
+		} else {
+			sendAPIResponse(w, r, err, "", http.StatusInternalServerError)
+		}
+	} else {
+		sendAPIResponse(w, r, err, "", getRespStatus(err))
+	}
+}
+
+func deleteFolderByPath(w http.ResponseWriter, r *http.Request) {
+	var folderPath string
+	if _, ok := r.URL.Query()["folder_path"]; ok {
+		folderPath = r.URL.Query().Get("folder_path")
+	}
+	if len(folderPath) == 0 {
+		err := errors.New("a non-empty folder path is required")
+		sendAPIResponse(w, r, err, "", http.StatusBadRequest)
+		return
+	}
+
+	folder, err := dataprovider.GetFolderByPath(dataProvider, folderPath)
+	if _, ok := err.(*dataprovider.RecordNotFoundError); ok {
+		sendAPIResponse(w, r, err, "", http.StatusNotFound)
+		return
+	} else if err != nil {
+		sendAPIResponse(w, r, err, "", http.StatusInternalServerError)
+		return
+	}
+	err = dataprovider.DeleteFolder(dataProvider, folder)
+	if err != nil {
+		sendAPIResponse(w, r, err, "", http.StatusInternalServerError)
+	} else {
+		sendAPIResponse(w, r, err, "Folder deleted", http.StatusOK)
+	}
+}