Init V4 community edition (#2265)

* Init V4 community edition

* Init V4 community edition

service/explorer/metadata.go

@@ -0,0 +1,37 @@
+package explorer
+
+import (
+	"github.com/cloudreve/Cloudreve/v4/application/dependency"
+	"github.com/cloudreve/Cloudreve/v4/inventory"
+	"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/fs"
+	"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/manager"
+	"github.com/cloudreve/Cloudreve/v4/pkg/serializer"
+	"github.com/gin-gonic/gin"
+)
+
+type (
+	PatchMetadataService struct {
+		Uris    []string           `json:"uris" binding:"required"`
+		Patches []fs.MetadataPatch `json:"patches" binding:"required,dive"`
+	}
+
+	PatchMetadataParameterCtx struct{}
+)
+
+func (s *PatchMetadataService) GetUris() []string {
+	return s.Uris
+}
+
+func (s *PatchMetadataService) Patch(c *gin.Context) error {
+	dep := dependency.FromContext(c)
+	user := inventory.UserFromContext(c)
+	m := manager.NewFileManager(dep, user)
+	defer m.Recycle()
+
+	uris, err := fs.NewUriFromStrings(s.Uris...)
+	if err != nil {
+		return serializer.NewError(serializer.CodeParamErr, "unknown uri", err)
+	}
+
+	return m.PatchMedata(c, uris, s.Patches...)
+}