experimenting with journalling...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

pwiki/index.js

@@ -16,8 +16,17 @@ var object = require('ig-object')
 //	makeIndex(<name>, <generate>[, <options>])
 //		-> <index-handler> 
 //
-//	Get merged data (cached)
+//	Call/get
 //	<index-handler>()
+//		-> <data>
+//		-> <promise>
+//
+//	Call the index handler method...
+//	<index-handler>('__call__', ..)
+//		-> ...
+//		-> <promise>
+//
+//	Get merged data (cached)
 //	<index-handler>('get')
 //		-> <data>
 //		-> <promise>
@@ -202,9 +211,15 @@ function(name, generate, options={}){
 	// build the method...
 	var meth
 	return (meth = Object.assign(
-		function(action='get', ...args){
+		function(action, ...args){
 			var that = this
 
+			action = action === undefined ?
+				('__call__' in options ?
+					'__call__'
+					: 'get')
+				: action
+
 			// action: status...
 			if(action == 'status'){
 				if(this[cache] instanceof Promise){
@@ -257,6 +272,7 @@ function(name, generate, options={}){
 
 			// action: other...
 			if(action != 'get' 
+					&& action != '__call__'
 					&& action != 'reset'){
 				var action_meth = `__${name}_${action}__`
 				// generate cache if not available...
@@ -277,8 +293,8 @@ function(name, generate, options={}){
 					&& _stamp(this, res)
 				return res }
 
-			// action: get...
-			return _await(this, 
+			// get/generate the data...
+			var res = _await(this, 
 				this[cache] =
 					// cached...
 					this[cache] != null ?
@@ -289,7 +305,16 @@ function(name, generate, options={}){
 						_stamp(this, 
 							this[merge](_make(this)))
 					// generate...
-					: _smake(this)) },
+					: _smake(this)) 
+
+			// action: call...
+			// NOTE: this directly returns the result to user but will 
+			// 		not automatically influence the stored value...
+			if(action == '__call__'){
+				return options.__call__.call(this, res, name, ...args) }
+
+			// action: get...
+			return res },
 		{
 			index: name,
 			indexed: true,

pwiki/store/base.js

@@ -430,6 +430,62 @@ module.BaseStore = {
 			: s.search(...args) },
 
 
+	// XXX EXPERIMENTAL...
+	// XXX Q: can we store journal data in a page???
+	__journal: index.makeIndex('journal',
+		function(){
+			// XXX stub...
+			var data = []
+			return data }, {
+
+		'__call__': function(data, name, from, to){
+			if(typeof(from) == 'object'){
+				var {from, to} = from }
+			var _get = function(data){
+				return data
+					.filter(function(elem){
+						return (!from 
+								|| elem[0] > from) 
+							&& (!to 
+								|| elem[0] <= to)}) }
+			return data instanceof Promise ?
+				data.then(_get)
+				: _get(data) },
+
+		// XXX do we need this???
+		'journal-clear': function(data, name){
+			this.__journal('clear')
+			return data },
+
+		update: function(data, name, path, update){
+			data.push([Date.now(), 'update', path, update])
+			return data },
+		remove: function(data, name, path){
+			data.push([Date.now(), 'remove', path])
+			return data }, 
+		//reset: function(){
+		//},
+		save: function(data, name){
+			// XXX move this out...
+			//var idb = require('idb-keyval')
+			// XXX
+			data.push([Date.now(), 'save'])
+			return data},
+		load: function(data, name){
+			// XXX move this out...
+			//var idb = require('idb-keyval')
+			// XXX should we clear the journal here???
+			this.__journal('clear')
+			// load...
+			// XXX
+
+			// XXX
+			data.push([Date.now(), 'load'])
+			return data}, }),
+	journal: function(){
+		return this.__journal('__call__', ...arguments)},
+
+
 	//
 	// 	.exists(<path>)
 	// 		-> <normalized-path>

pwiki2.js

@@ -31,7 +31,7 @@
 * XXX FEATURE: to avoid reinventing the wheel, serialize stuff as pages...
 * 		.paths					- ???
 * 		.names					- ???
-* 		.tags					- 
+* 		.tags					- DONE
 * 		.search()				- DONE
 * XXX index: pass name to all the handlers...
 * 		...this will simplify generic handlers...