From b8acc5f8af2c191360734280d44328d4307e90d8 Mon Sep 17 00:00:00 2001
From: Lennart <lennart.j1@schule.bremen.de>
Date: Fri, 30 Jul 2021 13:30:40 +0200
Subject: [PATCH] web/file2: add createfs.go

---
 web/file2/createfs.go   | 59 +++++++++++++++++++++++++++++++++++++++++
 web/file2/fs/fs_test.go |  7 ++---
 web/file2/s3/fs_test.go | 10 +++----
 3 files changed, 68 insertions(+), 8 deletions(-)
 create mode 100644 web/file2/createfs.go

diff --git a/web/file2/createfs.go b/web/file2/createfs.go
new file mode 100644
index 0000000..b605614
--- /dev/null
+++ b/web/file2/createfs.go
@@ -0,0 +1,59 @@
+package file
+
+import (
+	"errors"
+
+	"dev.sum7.eu/genofire/golang-lib/web/file2/fs"
+	"dev.sum7.eu/genofire/golang-lib/web/file2/s3"
+)
+
+// fsType represents a type of file store.
+type fsType int
+
+const (
+	typeFS fsType = iota
+	typeS3
+)
+
+var stringToType = map[string]fsType{
+	"fs": typeFS,
+	"s3": typeS3,
+}
+
+func (t *fsType) UnmarshalText(input []byte) error {
+	val, ok := stringToType[string(input)]
+	if !ok {
+		return errors.New("invalid file store type")
+	}
+	*t = val
+	return nil
+}
+
+// FSInfo is a TOML structure storing access information about a file store.
+type FSInfo struct {
+	fstype fsType `toml:"type"`
+	// file system
+	root string `toml:",omitempty"`
+	// s3
+	endpoint string `toml:",omitempty"`
+	secure   bool   `toml:",omitempty"`
+	id       string `toml:",omitempty"`
+	secret   string `toml:",omitempty"`
+	bucket   string `toml:",omitempty"`
+	location string `toml:",omitempty"`
+}
+
+// Create creates a file store from the information provided.
+func (i *FSInfo) Create() (FS, error) {
+	switch i.fstype {
+	case typeFS:
+		if len(i.root) == 0 {
+			return nil, errors.New("no file store root")
+		}
+		return &fs.FS{Root: i.root}, nil
+	case typeS3:
+		return s3.New(i.endpoint, i.secure, i.id, i.secret, i.bucket, i.location)
+	default:
+		return nil, errors.New("FSInfo.Create not implemented for provided file store type")
+	}
+}
diff --git a/web/file2/fs/fs_test.go b/web/file2/fs/fs_test.go
index 9a7c628..fd58242 100644
--- a/web/file2/fs/fs_test.go
+++ b/web/file2/fs/fs_test.go
@@ -1,4 +1,4 @@
-package fs
+package fs_test
 
 import (
 	"io"
@@ -10,11 +10,12 @@ import (
 	"github.com/stretchr/testify/assert"
 
 	"dev.sum7.eu/genofire/golang-lib/web/file2"
+	"dev.sum7.eu/genofire/golang-lib/web/file2/fs"
 )
 
 func TestOpenStat(t *testing.T) {
 	assert := assert.New(t)
-	var fs file.FS = &FS{Root: "./testdata"}
+	var fs file.FS = &fs.FS{Root: "./testdata"}
 	assert.NoError(fs.Check())
 
 	f, err := fs.Open("glenda")
@@ -32,7 +33,7 @@ func TestOpenStat(t *testing.T) {
 
 func TestCreateOpenUUIDRead(t *testing.T) {
 	assert := assert.New(t)
-	var fs file.FS = &FS{Root: "./testdata"}
+	var fs file.FS = &fs.FS{Root: "./testdata"}
 	assert.NoError(fs.Check())
 
 	err := fs.Store(uuid.MustParse("f9375ccb-ee09-4ecf-917e-b88725efcb68"), "$name", "text/plain", strings.NewReader("hello, world\n"))
diff --git a/web/file2/s3/fs_test.go b/web/file2/s3/fs_test.go
index ccd4ee1..84e8c83 100644
--- a/web/file2/s3/fs_test.go
+++ b/web/file2/s3/fs_test.go
@@ -1,4 +1,4 @@
-package s3
+package s3_test
 
 import (
 	"testing"
@@ -13,12 +13,12 @@ import (
 func TestTypes(t *testing.T) {
 	assert := assert.New(t)
 
-	var fs file.FS
-	fs, err := New("127.0.0.1", false, "", "", "", "")
-	_ = fs
+	var fstore file.FS
+	fstore, err := s3.New("127.0.0.1", false, "", "", "", "")
+	_ = fstore
 	assert.Error(err)
 }
 
 func ExampleNew() {
-	New("play.min.io", true, "Q3AM3UQ867SPQQA43P2F", "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG", "file-store", "")
+	s3.New("play.min.io", true, "Q3AM3UQ867SPQQA43P2F", "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG", "file-store", "")
 }