feat: Optimize saved image

frappe/core/doctype/file/file.js

@@ -23,6 +23,25 @@ frappe.ui.form.on("File", "refresh", function(frm) {
 		wrapper.empty();
 	}
 
+	var is_raster_image = (/\.(gif|jpg|jpeg|tiff|png)$/i).test(frm.doc.file_url);
+	var is_optimizable = !frm.doc.is_folder && is_raster_image && frm.doc.file_size > 0;
+
+	if(is_optimizable) {
+		frm.add_custom_button(__("Optimize"), function() {
+			frappe.show_alert(__("Optimizing image..."));
+			frappe.call({
+				method: "frappe.core.doctype.file.file.optimize_saved_image",
+				args: {
+					doc_name: frm.doc.name,
+				},
+				callback: function() {
+					frappe.show_alert(__("Image optimized"));
+					frappe.set_route("List", "File");
+				}
+			});
+		});
+	}
+
 	if(frm.doc.file_name && frm.doc.file_name.split('.').splice(-1)[0]==='zip') {
 		frm.add_custom_button(__('Unzip'), function() {
 			frappe.call({

frappe/core/doctype/file/file.py

@@ -937,6 +937,22 @@ def unzip_file(name):
 	files = file_obj.unzip()
 	return len(files)
 
+@frappe.whitelist()
+def optimize_saved_image(doc_name):
+	file_doc = frappe.get_doc('File', doc_name)
+	content = file_doc.get_content()
+	content_type = mimetypes.guess_type(file_doc.file_name)[0]
+
+	optimized_content = optimize_image(content, content_type)
+
+	file_path = get_files_path(is_private=file_doc.is_private)
+	file_path = os.path.join(file_path.encode('utf-8'), file_doc.file_name.encode('utf-8'))
+	with open(file_path, 'wb+') as f:
+		f.write(optimized_content)
+
+	file_doc.file_size = len(optimized_content)
+	file_doc.content_hash = get_content_hash(optimized_content)
+	file_doc.save()
 
 @frappe.whitelist()
 def get_attached_images(doctype, names):