Add 'save' module

author: tomsmeding <tom.smeding@gmail.com> 2017-12-24 17:19:24 +0100
committer: tomsmeding <tom.smeding@gmail.com> 2017-12-24 17:19:24 +0100
commit: 6fbce51f49502c5ff5f45cef9e58973fa0f3a90c (patch)
tree: 4753eac41ec161a118f329c5284dc4e3ecd2d3e2 /modules/save
parent: 77d73b37116c44a13962cd1676ea457c37d7cf96 (diff)
3 files changed, 256 insertions, 0 deletions
diff --git a/modules/save/index.html b/modules/save/index.html
new file mode 100644
index 0000000..d8c55ca
--- /dev/null
+++ b/modules/save/index.html
@@ -0,0 +1,41 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Save</title>
+<script>
+function doSave(){
+	var text=document.getElementById("text").value.trim();
+	if(text==""){
+		alert("Please enter some text");
+		return;
+	}
+
+	var xhr=new XMLHttpRequest();
+	xhr.onreadystatechange=function(){
+		if(xhr.readyState==4){
+			if(xhr.status!=200){
+				alert("Error saving text\n"+xhr.responseText);
+			} else {
+				alert("Successfully saved!")
+				document.getElementById("text").value="";
+			}
+		}
+	};
+	xhr.open("POST","/save");
+	xhr.send(text);
+}
+</script>
+<style>
+body {
+	font-family: sans-serif;
+}
+</style>
+</head>
+<body>
+<h2>Save some text for Tom</h2>
+<textarea id="text" style="width:500px;height:100px"></textarea><br>
+<br>
+<input type="button" value="Save" onclick="doSave()">
+</body>
+</html>
diff --git a/modules/save/read.html b/modules/save/read.html
new file mode 100644
index 0000000..c359dd5
--- /dev/null
+++ b/modules/save/read.html
@@ -0,0 +1,131 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Save: Read</title>
+<script>
+var currentFname=null;
+
+function populateList(arr){
+	var ul=document.getElementById("ul");
+	ul.innerHTML="";
+
+	if(arr.length==0){
+		document.getElementById("nosaves").classList.remove("invisible");
+		return;
+	}
+	document.getElementById("nosaves").classList.add("invisible");
+
+	for(var i=0;i<arr.length;i++){
+		var li=document.createElement("li");
+		var a=document.createElement("a");
+		a.appendChild(document.createTextNode(arr[i]));
+		a.href="javascript:void 0";
+		a.addEventListener("click",(function(i,li){return function(){
+			var xhr=new XMLHttpRequest();
+			xhr.onreadystatechange=function(){
+				if(xhr.readyState==4){
+					if(xhr.status!=200){
+						alert("Error reading save '"+arr[i]+"'\n"+xhr.responseText);
+					} else {
+						var l=ul.getElementsByClassName("selected");
+						for(var i=0;i<l.length;i++)l[i].classList.remove("selected");
+						li.classList.add("selected");
+						displaySave(arr[i],xhr.responseText);
+					}
+				}
+			};
+			xhr.open("GET","/save/read/file/"+encodeURIComponent(arr[i]));
+			xhr.send();
+		};})(i,li));
+		li.appendChild(a);
+		ul.appendChild(li);
+	}
+}
+
+function displaySave(fname,text){
+	var e;
+	e=document.getElementById("filename");
+	e.innerHTML=""; e.appendChild(document.createTextNode(fname));
+
+	e=document.getElementById("contents");
+	e.innerHTML=""; e.appendChild(document.createTextNode(text));
+
+	document.getElementById("container").classList.remove("invisible");
+
+	currentFname=fname;
+}
+
+function deleteCurrent(){
+	if(!currentFname){
+		alert("No save selected");
+		return;
+	}
+
+	if(!confirm("Really delete this save?"))return;
+
+	var xhr=new XMLHttpRequest();
+	xhr.onreadystatechange=function(){
+		if(xhr.readyState==4){
+			if(xhr.status!=200){
+				alert("Error deleting saves\n"+xhr.responseText);
+			} else {
+				currentFname=null;
+				document.getElementById("container").classList.add("invisible");
+				loadSaves();
+			}
+		}
+	};
+	xhr.open("DELETE","/save/read/file/"+encodeURIComponent(currentFname));
+	xhr.send();
+}
+
+function loadSaves(){
+	var xhr=new XMLHttpRequest();
+	xhr.onreadystatechange=function(){
+		if(xhr.readyState==4){
+			if(xhr.status!=200){
+				alert("Error listing saves\n"+xhr.responseText);
+			} else {
+				populateList(JSON.parse(xhr.responseText));
+			}
+		}
+	};
+	xhr.open("GET","/save/read/files");
+	xhr.send();
+}
+
+window.addEventListener("load",function(){
+	loadSaves();
+});
+</script>
+<style>
+body {
+	font-family: sans-serif;
+	font-size: 16px;
+}
+#contents {
+	border: 1px gray solid;
+	padding: 5px;
+	display: inline-block;
+}
+li.selected {
+	font-weight: bold;
+}
+.invisible {
+	display: none;
+}
+</style>
+</head>
+<body>
+<h2>Save: Read</h2>
+<div id="nosaves"><i>No saves found!</i></div>
+<ul id="ul"></ul>
+<br>
+<div id="container" class="invisible">
+	<b id="filename"></b><br>
+	<a href="javascript:void 0" onclick="deleteCurrent()">Delete</a><br>
+	<pre id="contents"></pre>
+</div>
+</body>
+</html>
diff --git a/modules/save/save.js b/modules/save/save.js
new file mode 100644
index 0000000..d64e66e
--- /dev/null
+++ b/modules/save/save.js
@@ -0,0 +1,84 @@
+var cmn=require("../$common.js"),
+    fs=require("fs"),
+    mkdirp=require("mkdirp");
+
+var moddir;
+var directory;
+
+var filenameRegex=/[^a-zA-Z0-9._-]/g;
+
+function pad(s,n){
+	s=s+"";
+	var p="";
+	while(s.length+p.length<n)p+="0";
+	return p+s;
+}
+
+function makefilename(){
+	var d=new Date();
+	var s=[
+		pad(d.getFullYear(),4), pad(d.getMonth()+1,2), pad(d.getDate(),2),
+		pad(d.getHours(),2), pad(d.getMinutes(),2), pad(d.getSeconds(),2),
+		pad(d.getMilliseconds(),3)
+	].join("-");
+	return s+".txt";
+}
+
+module.exports=function(app,io,_moddir){
+	moddir=_moddir;
+	directory=moddir+"/saves";
+
+	mkdirp.sync(directory);
+
+	app.get("/save",function(req,res){
+		res.sendFile(moddir+"/index.html");
+	});
+	app.post("/save",function(req,res){
+		var s=req.body.trim();
+		if(s=="")res.status(400).send("No text sent");
+		fs.writeFile(directory+"/"+makefilename(),s,function(err){
+			if(err){
+				console.log(err);
+				res.status(500).send("An error occurred");
+				return;
+			}
+			res.send();
+		});
+	});
+
+	app.all(["/save/read","/save/read/*"],cmn.authgen());
+
+	app.get("/save/read",function(req,res){
+		res.sendFile(moddir+"/read.html");
+	});
+	app.get("/save/read/files",function(req,res){
+		fs.readdir(directory,function(err,files){
+			if(err){
+				console.log(err);
+				res.status(500).send(err);
+				return;
+			}
+			res.send(JSON.stringify(files));
+		});
+	});
+	app.get("/save/read/file/:fname",function(req,res){
+		var fname=req.params.fname.replace(filenameRegex,"");
+		fs.readFile(directory+"/"+fname,function(err,text){
+			if(err){
+				res.status(404).send("File not found");
+				return;
+			}
+			res.send(text);
+		});
+	});
+	app.delete("/save/read/file/:fname",function(req,res){
+		var fname=req.params.fname.replace(filenameRegex,"");
+		fs.unlink(directory+"/"+fname,function(err){
+			if(err){
+				res.status(404).send("File not found");
+				return;
+			}
+			res.send();
+		});
+	});
+};
author	tomsmeding <tom.smeding@gmail.com>	2017-12-24 17:19:24 +0100
committer	tomsmeding <tom.smeding@gmail.com>	2017-12-24 17:19:24 +0100
commit	6fbce51f49502c5ff5f45cef9e58973fa0f3a90c (patch)
tree	4753eac41ec161a118f329c5284dc4e3ecd2d3e2 /modules/save
parent	77d73b37116c44a13962cd1676ea457c37d7cf96 (diff)