From d7d6857dae4f5a32c2776cb10dc312a123d669b9 Mon Sep 17 00:00:00 2001
From: "Alex A. Naanou" <alex.nanou@gmail.com>
Date: Thu, 12 Nov 2020 05:18:28 +0300
Subject: [PATCH] tweaking...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
---
 Viewer/features/core.js  | 101 +++++++++++++++++++++++++++++++++++++++
 Viewer/features/sharp.js |   6 +++
 2 files changed, 107 insertions(+)

diff --git a/Viewer/features/core.js b/Viewer/features/core.js
index 487fcf23..674375bd 100755
--- a/Viewer/features/core.js
+++ b/Viewer/features/core.js
@@ -2439,6 +2439,107 @@ function(title, func){
 		}) }
 
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
+
+var Task =
+module.Task =
+object.Constructor('Task', {
+})
+
+
+//
+//	eventMethod(name[, func])
+//	eventMethod(name[, func], 'hidden')
+//		-> method
+//
+//	eventMethod(name[, func], 'visible')
+//		-> method
+//
+//
+//	Bind handler...
+//	method(handler)
+//		-> this
+//
+//	Unbind handler...
+//	method(handler, false)
+//		-> this
+//
+//	Trigger handlers...
+//	method(...args)
+//		-> this
+//
+//
+//	func(handle, ...args)
+//
+//
+// XXX move this someplace generic...
+var eventMethod = function(name, func, mode='hidden'){
+	// no func given...
+	if(typeof(func) != 'function'){
+		mode = func
+		func = undefined }
+	// hidden handler list...
+	var handlers = mode == 'hidden' && []
+
+	return function(func, mode){
+		handlers = handlers === false ?
+			this['__'+name]
+			: handlers
+		// bind/unbind event handler...
+		if(typeof(func) == 'function'){
+			mode === false ?
+				handlers.splice(handlers.indexOf(func), 1)
+				: handlers.push(func) 
+		// trigger the event...
+		} else {
+			var args = [...arguments]
+			var handle = function(){
+				handlers
+					.forEach(function(handler){ 
+						handler(...args) }) } 
+			func ?
+				func.call(this, handle, ...args) 
+				: handle(...args)}
+		return this } }
+
+var taskAction =
+module.taskAction =
+function(title, func){
+	return Object.assign(
+		task(function(){
+			var that = this
+
+			// XXX
+			var ticket = {
+				// XXX revise naming...
+				start: eventMethod('start', function(handle, ...args){
+				}),
+				pause: eventMethod('pause', function(handle, ...args){
+				}),
+				abort: eventMethod('abort', function(handle, ...args){
+					if(!this.state != 'done'){
+						this.abortTask(title) 
+						handle(...args) } }),
+
+				// can be:
+				// 	- ready
+				// 	- running
+				// 	- done
+				get state(){
+				},
+			}
+
+			return func.call(this, ticket, ...args)
+				.then(function(){
+				})
+				.catch(function(){
+				}) }),
+		{
+			toString: function(){
+				return `core.taskAction('${ title }', \n${ func.toString() })` },
+		}) }
+
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
 
 var makeTaskAction = 
diff --git a/Viewer/features/sharp.js b/Viewer/features/sharp.js
index e56857c8..70e0d579 100755
--- a/Viewer/features/sharp.js
+++ b/Viewer/features/sharp.js
@@ -601,11 +601,17 @@ var SharpActions = actions.Actions({
 
 			var CHUNK_SIZE = 4
 
+			// XXX this seems to be called prematurely...
 			abort.cleanup(function(reason, res){
+				console.log('!!!!!!',
+					logger && logger.log.length,
+					reason, res)
+				/*
 				logger 
 					&& logger.emit('done')
 					&& reason == 'aborted'
 						&& logger.emit(res)
+				//*/
 				delete that.__cache_metadata_reading })
 
 			// handle logging and processing list...