chore: import upstream snapshot with attribution

plugin/storage.go

@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package plugin
+
+type UploadSource string
+
+const (
+	UserAvatar         UploadSource = "user_avatar"
+	UserPost           UploadSource = "user_post"
+	UserPostAttachment UploadSource = "user_post_attachment"
+	AdminBranding      UploadSource = "admin_branding"
+)
+
+var (
+	DefaultFileTypeCheckMapping = map[UploadSource]map[string]bool{
+		UserAvatar: {
+			".jpg":  true,
+			".jpeg": true,
+			".png":  true,
+			".webp": true,
+		},
+		UserPost: {
+			".jpg":  true,
+			".jpeg": true,
+			".png":  true,
+			".gif":  true,
+			".webp": true,
+		},
+		AdminBranding: {
+			".jpg":  true,
+			".jpeg": true,
+			".png":  true,
+			".ico":  true,
+		},
+	}
+)
+
+type UploadFileCondition struct {
+	// Source is the source of the file
+	Source UploadSource
+	// MaxImageSize is the maximum size of the image in MB
+	MaxImageSize int
+	// MaxAttachmentSize is the maximum size of the attachment in MB
+	MaxAttachmentSize int
+	// MaxImageMegapixel is the maximum megapixel of the image
+	MaxImageMegapixel int
+	// AuthorizedImageExtensions is the list of authorized image extensions
+	AuthorizedImageExtensions []string
+	// AuthorizedAttachmentExtensions is the list of authorized attachment extensions
+	AuthorizedAttachmentExtensions []string
+}
+
+type UploadFileResponse struct {
+	// FullURL is the URL that can be used to access the file
+	FullURL string
+	// OriginalError is the error returned by the storage plugin. It is used for debugging.
+	OriginalError error
+	// DisplayErrorMsg is the error message that will be displayed to the user.
+	DisplayErrorMsg Translator
+}
+
+type Storage interface {
+	Base
+
+	// UploadFile uploads a file to storage.
+	// The file is in the Form of the ctx and the key is "file"
+	UploadFile(ctx *GinContext, condition UploadFileCondition) UploadFileResponse
+}
+
+var (
+	// CallStorage is a function that calls all registered storage
+	CallStorage,
+	registerStorage = MakePlugin[Storage](false)
+)