From 3eefecfc606864a13b1b1e76d99ea73aa3139895 Mon Sep 17 00:00:00 2001
From: Martin <martin@urbackup.org>
Date: Sun, 15 Mar 2015 00:56:19 +0100
Subject: [PATCH] Automatically regenerate templates if they change

(cherry picked from commit 6603adade43277d47693231537a6929a0d06eae3)

Conflicts:
	urbackupserver/www/templates/compile_templates.js
---
 .../www/templates/compile_templates.js        | 79 ++++++++++++++-----
 .../www/templates/compile_templates_watch.bat |  1 +
 2 files changed, 59 insertions(+), 21 deletions(-)
 create mode 100644 urbackupserver/www/templates/compile_templates_watch.bat

diff --git a/urbackupserver/www/templates/compile_templates.js b/urbackupserver/www/templates/compile_templates.js
index 6cf0ab9f..2bfe7cf2 100644
--- a/urbackupserver/www/templates/compile_templates.js
+++ b/urbackupserver/www/templates/compile_templates.js
@@ -1,6 +1,8 @@
 var fs = require('fs');
 var path = require('path');
 var dust = require("dustjs-linkedin");
+var EventEmitter=require('events').EventEmitter,
+    filesEE=new EventEmitter();
 
 
 function getExtension(filename) {
@@ -9,26 +11,61 @@ function getExtension(filename) {
 }
 
 var templates_file="../js/templates.js";
+var generating = false;
 
-fs.writeFileSync(templates_file, '');
+function generate_templates()
+{
+	if(generating==true)
+	{
+		setTimeout(generate_templates, 100);
+		return;
+	}
+	generating = true;
+	console.log("Generating templates...");
+	
+	fs.writeFileSync(templates_file, '');
+	
+	var open_files = 0;
+
+	fs.readdir('.', function(err,files){
+		if(err) throw err;
+		files.sort(function(a, b) {
+			return a===b ? 0 : ( a < b ? -1 : 1);
+		}).forEach(function(file){
+			if(getExtension(file)=="htm")
+			{
+				++open_files;
+				fs.readFile(file, 'utf8', function (err,data) {
+					if (err) throw err;
+					if (data.charCodeAt(0) == 65279) {
+						data = data.substring(1);
+					}
+					console.log("Compiling template "+file+" ...");
+					fs.appendFileSync(templates_file, dust.compile(data, file.substring(0, file.length-4))+"\n");
+					--open_files;
+					
+					if(open_files==0)
+					{
+						console.log("Done compiling templates.");
+						generating = false;
+					}					
+				});
+			}
+		});
+	 });	 
+}
+
+generate_templates();
+
+if(process.argv.length>2 && process.argv[2]=="watch")
+{
+	console.log("Watching for directory changes.");
+	var chokidar = require('chokidar');
+	var watcher = chokidar.watch('.', {persistent: true, ignoreInitial: true});
+	watcher
+	  .on('add', generate_templates)
+	  .on('change', generate_templates)
+	  .on('unlink', generate_templates)
+	  .on('error', function(error) {console.error('Error happened', error);})
+}
 
-fs.readdir('.', function(err,files){
-    if(err) throw err;
-	files.sort(function(a, b) {
-        return a < b ? -1 : 1;
-    }).forEach(function(file){
-		if(getExtension(file)=="htm")
-		{
-			fs.readFile(file, 'utf8', function (err,data) {
-				if (err) throw err;
-				if (data.charCodeAt(0) == 65279) {
-                    data = data.substring(1);
-                }
-				console.log("Compiling template "+file+" ...");
-				fs.appendFileSync(templates_file, dust.compile(data, file.substring(0, file.length-4))+"\n");
-			});
-		}
-    });
- });
- 
- console.log("Done compiling templates.");
\ No newline at end of file
diff --git a/urbackupserver/www/templates/compile_templates_watch.bat b/urbackupserver/www/templates/compile_templates_watch.bat
new file mode 100644
index 00000000..1e48b940
--- /dev/null
+++ b/urbackupserver/www/templates/compile_templates_watch.bat
@@ -0,0 +1 @@
+node compile_templates.js watch
\ No newline at end of file