From 823d072ad49e30832d167e4c04bdf1b64b5a5336 Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Sat, 25 Feb 2017 09:55:13 +0100
Subject: todo: Shift ahead repeating items

---
 modules/todo/todo.html | 79 ++++++++++++++++++++++++++++++++++++++++----------
 modules/todo/todo.js   | 39 +++++++++++++++++++++++++
 2 files changed, 102 insertions(+), 16 deletions(-)

diff --git a/modules/todo/todo.html b/modules/todo/todo.html
index 19b9370..22cce9b 100644
--- a/modules/todo/todo.html
+++ b/modules/todo/todo.html
@@ -61,6 +61,17 @@ function beginOfDay(date){
 	return d;
 }
 
+function shiftDate(date,repweeks){
+	var Y=date.getFullYear(),
+	    M=date.getMonth(),
+	    D=date.getDate(),
+	    h=date.getHours(),
+	    m=date.getMinutes(),
+	    s=date.getSeconds(),
+	    ms=date.getMilliseconds();
+	return new Date(Y,M,D+7*repweeks,h,m,s,ms);
+}
+
 function fancytime(timeS){
 	return pad(timeS.hour,2,"0")+":"+pad(timeS.min,2,"0")+(timeS.sec==0?"":":"+pad(timeS.sec,2,"0"));
 }
@@ -95,7 +106,7 @@ function tablerowfor(task){
 	var div=document.createElement("div");
 	div.classList.add("task");
 
-	var e=document.createElement("span");
+	var e=document.createElement("span"),e2;
 	e.classList.add("tasksubject");
 	e.appendChild(document.createTextNode(task.subject));
 	div.appendChild(e);
@@ -108,22 +119,43 @@ function tablerowfor(task){
 		e.appendChild(document.createTextNode((task.repweeks!=0?"(rep) ":"")+fancydate(task.date)));
 		e.setAttribute("title",task.date.toString());
 		e.appendChild(document.createElement("br"));
-		var e2=document.createElement("span");
-		e2.classList.add("subdate");
-		e2.appendChild(document.createTextNode(task.date.toString()));
+		e2=document.createElement("span");
+			e2.classList.add("subdate");
+			e2.appendChild(document.createTextNode(task.date.toString()));
 		e.appendChild(e2);
 		float.appendChild(e);
 
-		e=document.createElement("span");
-		e.classList.add("taskdelete");
-		e.appendChild(document.createTextNode("X"));
-		e.addEventListener("click",function(ev){
-			if(!confirm("Really delete task \""+task.subject+"\"?"))return
-			fetch("DELETE","/todo/task",task.id,function(status,body){
-				if(status==200)getlist();
-				else alert("Delete failed: "+body);
+		e=document.createElement("div");
+		e.classList.add("taskbuttons");
+		e2=document.createElement("span");
+			e2.classList.add("taskdelete");
+			e2.appendChild(document.createTextNode("X"));
+			e2.addEventListener("click",function(ev){
+				if(!confirm("Really delete task \""+task.subject+"\"?"))return;
+				fetch("DELETE","/todo/task",task.id,function(status,body){
+					if(status==200)getlist();
+					else alert("Delete failed: "+body);
+				});
 			});
-		});
+		e.appendChild(e2);
+
+		if(task.repweeks!=0){
+			e.appendChild(document.createElement("br"));
+
+			e2=document.createElement("span");
+			e2.classList.add("taskshiftahead");
+			e2.appendChild(document.createTextNode("→"));
+			e2.addEventListener("click",function(ev){
+				if(!confirm("Really shift task \""+task.subject+"\" ahead by "+
+				            task.repweeks+" week"+(task.repweeks!=1?"s":"")+"?"))return;
+				fetch("POST","/todo/task/shiftahead",task.id,function(status,body){
+					if(status==200)getlist();
+					else alert("Shiftahead failed: "+body);
+				});
+			});
+			e.appendChild(e2);
+		}
+
 		float.appendChild(e);
 
 	div.appendChild(float);
@@ -141,7 +173,7 @@ function refreshlist(list){
 		task=list[i];
 		if(task.repweeks!=0){
 			while(task.date<now){
-				task.date=new Date(task.date.getTime()+task.repweeks*7*24*3600*1000);
+				task.date=shiftDate(task.date,task.repweeks);
 			}
 		}
 		rows.push([task.date,tablerowfor(task)]);
@@ -256,13 +288,28 @@ body{
 	color:#ccc;
 	font-size:8px;
 }
-.taskdelete{
+.taskbuttons{
+	margin-top:-5px;
+	display:inline-block;
 	margin-left:60px;
 	font-size:10px;
+	vertical-align:top;
+	width:10px;
+	text-align:center;
+}
+.taskdelete{
+	margin-bottom:5px;
+	font-size:10px;
 	font-family:sans-serif;
 	color:red;
 	cursor:pointer;
-	vertical-align:top;
+}
+.taskshiftahead{
+	line-height:25px;
+	font-size:12px;
+	font-family:sans-serif;
+	color:blue;
+	cursor:pointer;
 }
 #addtaskform{
 	border:1px #ddd solid;
diff --git a/modules/todo/todo.js b/modules/todo/todo.js
index 66433d9..8fabc63 100644
--- a/modules/todo/todo.js
+++ b/modules/todo/todo.js
@@ -52,6 +52,18 @@ var naccounts=0;
 })();
 
 
+function shiftDate(date,repweeks){
+	var Y=date.getFullYear(),
+	    M=date.getMonth(),
+	    D=date.getDate(),
+	    h=date.getHours(),
+	    m=date.getMinutes(),
+	    s=date.getSeconds(),
+	    ms=date.getMilliseconds();
+	return new Date(Y,M,D+7*repweeks,h,m,s,ms);
+}
+
+
 function sendUnauth(res){
 	res.set("WWW-Authenticate","Basic realm=Authorization required");
 	return res.sendStatus(401);
@@ -161,6 +173,33 @@ module.exports=function(app,io,_moddir){
 		if(fail)res.status(404).send("Unknown id");
 		else res.status(200).end();
 	});
+	app.post("/todo/task/shiftahead",function(req,res){
+		var id=+req.body;
+		var i;
+		var fail=false;
+		var usertasks=tasks[req.authuser];
+		var now;
+		if(id<0||~~id!=id||isNaN(id)||!usertasks){
+			fail=true;
+		} else {
+			for(i=0;i<usertasks.length;i++)if(usertasks[i].id==id)break;
+			if(i==usertasks.length)fail=true;
+			else if(usertasks[i].repweeks==0){
+				res.status(400).send("Can't shiftahead a non-repeating task");
+				return;
+			} else {
+				now=new Date();
+				while(usertasks[i].date<now){ // First move up to now
+					usertasks[i].date=shiftDate(usertasks[i].date,usertasks[i].repweeks);
+				}
+				// Then for the actual shiftahead:
+				usertasks[i].date=shiftDate(usertasks[i].date,usertasks[i].repweeks);
+				persist.setItemSync("tasks",tasks);
+			}
+		}
+		if(fail)res.status(404).send("Unknown id");
+		else res.status(200).end();
+	});
 	app.post("/todo/task",function(req,res){
 		var obj;
 		try {
-- 
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