From c0d908af4df09c05ac8432ab421fdb0470a2c41e Mon Sep 17 00:00:00 2001
From: ansuz <ansuz@transitiontech.ca>
Date: Thu, 13 Jun 2019 11:20:53 +0200
Subject: [PATCH] implement 'unarchiveChannel'

---
 storage/file.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/storage/file.js b/storage/file.js
index 86aea935c..1f8c00a0c 100644
--- a/storage/file.js
+++ b/storage/file.js
@@ -301,6 +301,19 @@ var archiveChannel = function (env, channelName, cb) {
     Fse.move(currentPath, archivePath, { overwrite: true }, cb);
 };
 
+var unarchiveChannel = function (env, channelName, cb) {
+    // very much like 'archiveChannel' but in the opposite direction
+
+    // the file is currently archived
+    var currentPath = mkArchivePath(env, channelName);
+    var unarchivedPath = mkPath(env, channelName);
+
+    // if a file exists in the unarchived path, you probably don't want to clobber its data
+    // so unlike 'archiveChannel' we won't overwrite.
+    // Fse.move will call back with EEXIST in such a situation
+    Fse.move(currentPath, unarchivedPath, cb);
+};
+
 var flushUnusedChannels = function (env, cb, frame) {
     var currentTime = +new Date();
 
@@ -589,6 +602,10 @@ module.exports.create = function (
                 if (!isValidChannelId(channelName)) { return void cb(new Error('EINVAL')); }
                 archiveChannel(env, channelName, cb);
             },
+            unarchiveChannel: function (channelName, cb) {
+                if (!isValidChannelId(channelName)) { return void cb(new Error('EINVAL')); }
+                unarchiveChannel(env, channelName, cb);
+            },
             log: function (channelName, content, cb) {
                 message(env, channelName, content, cb);
             },