Add option to change downloaded filename prefix

The downloaded file would always have this format:

    chrome-tabs-20150215-12h38.yml

Add a user-customisable option to change the "chrome-tabs-" prefix of
the filename.

I realised I wanted this after installing the extension on both Chrome
and Chrome Canary, and wanted to have my backup files named differently
depending on the version of Chrome they were coming from.

1 files changed, 3 insertions, 3 deletions

diff --git a/chrome-get-urls-from-tabs-in-windows.js b/chrome-get-urls-from-tabs-in-windows.js
index e38c6ce..b2c3554 100644
--- a/chrome-get-urls-from-tabs-in-windows.js
+++ b/chrome-get-urls-from-tabs-in-windows.js
@@ -110,7 +110,7 @@ create_download_link = function(text, callback) {
 };
 
 
-generate_file_string = function() {
+generate_file_string = function(filename_prefix) {
 	var d = new Date();
 	var date_string = 
 		d.getFullYear() 
@@ -123,7 +123,7 @@ generate_file_string = function() {
 		+ 'h' 
 		+ ('0' + d.getMinutes()).slice(-2);
 	
-	return 'chrome-tabs-' + date_string;
+	return (filename_prefix ? filename_prefix : 'chrome-tabs-') + date_string;
 };
 
 
@@ -142,6 +142,6 @@ generate_filename = function(callback) {
 			file_extension = 'txt';
 		}
 		
-		callback(generate_file_string() + '.' + file_extension);
+		callback(generate_file_string(items.filename_prefix) + '.' + file_extension);
 	});
 };
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