FileStorage: Add upload form (#46749)

* move upload to http

* use storage from grafanads

* rever gomod changes

* fix test

* wip

* add upload func

* update upload func

* writing to uploads

* edit response from service

* use dropzone for UI

* modify response struct in service

* better read file

* set content type for svg

* restrict file types upload

* add test and clean up errors

* pass test

* fix backend lint errors

* limit type of files on FE

* add TODO for after merge

* rebase with storage changes

* comment out unused function

* update UI to not have 2 uploads

* only call upload on select

* use utils function to find * in path

* show preview on drag over

* not allowing upload of svg

* add preview to upload tab

* no console.log

* resolve conflicts

* refactor log line

* fix failing BE test

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>
Co-authored-by: Artur Wierzbicki <artur.wierzbicki@grafana.com>

pkg/services/store/service_test.go

@@ -3,12 +3,17 @@ package store
 import (
 	"bytes"
 	"context"
+	"mime/multipart"
+	"os"
 	"path"
 	"path/filepath"
 	"testing"
 
 	"github.com/grafana/grafana-plugin-sdk-go/experimental"
+	"github.com/grafana/grafana/pkg/services/featuremgmt"
+	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/tsdb/testdatasource"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -45,3 +50,18 @@ func TestListFiles(t *testing.T) {
 	err = experimental.CheckGoldenFrame(path.Join("testdata", "public_testdata_js_libraries.golden.txt"), frame, true)
 	require.NoError(t, err)
 }
+
+func TestUpload(t *testing.T) {
+	features := featuremgmt.WithFeatures(featuremgmt.FlagStorageLocalUpload)
+	path, err := os.Getwd()
+	require.NoError(t, err)
+	cfg := &setting.Cfg{AppURL: "http://localhost:3000/", DataPath: path}
+	s := ProvideService(nil, features, cfg)
+	testForm := &multipart.Form{
+		Value: map[string][]string{},
+		File:  map[string][]*multipart.FileHeader{},
+	}
+	res, err := s.Upload(context.Background(), nil, testForm)
+	require.NoError(t, err)
+	assert.Equal(t, res.path, "upload")
+}