Move the shared folder loader to the new module

www/common/outer/sharedfolder.js

@@ -1,12 +1,21 @@
 define([
     '/common/common-hash.js',
+    '/common/common-util.js',
+    '/common/userObject.js',
 
+    '/bower_components/nthen/index.js',
     '/bower_components/chainpad-crypto/crypto.js',
     '/bower_components/chainpad-listmap/chainpad-listmap.js',
     '/bower_components/chainpad/chainpad.dist.js',
-], function (Hash, Crypto, Listmap, ChainPad) {
+], function (Hash, Util, UserObject,
+             nThen, Crypto, Listmap, ChainPad) {
     var SF = {};
 
+    /* load
+        create and load a proxy using listmap for a given shared folder
+        - config: network and "manager" (either the user one or a team manager)
+        - id: shared folder id
+    */
     SF.load = function (config, id, data, cb) {
         var network = config.network;
         var manager = config.manager;
@@ -30,18 +39,53 @@ define([
             }
         };
         var rt = Listmap.create(listmapConfig);
-        //store.sharedFolders[id] = rt; // XXX
         rt.proxy.on('ready', function (info) {
             manager.addProxy(id, rt.proxy, info.leave);
             cb(rt, info.metadata);
         });
-        // XXX
-        /*if (store.driveEvents) {
-            registerProxyEvents(rt.proxy, id);
-        }*/
         return rt;
     };
-    
+
+    /* loadSharedFolders
+        load all shared folder stored in a given drive
+        - proxy: user or team main proxy
+        - userObject: userObject associated to the main drive
+        - handler: a function (sfid, rt) called for each shared folder loaded
+    */
+    SF.loadSharedFolders = function (proxy, userObject, handler, waitFor) {
+        store.sharedFolders = {};
+        var shared = Util.find(proxy, ['drive', UserObject.SHARED_FOLDERS]) || {};
+        // Check if any of our shared folder is expired or deleted by its owner.
+        // If we don't check now, Listmap will create an empty proxy if it no longer exists on
+        // the server.
+        nThen(function (waitFor) {
+            var checkExpired = Object.keys(shared).map(function (fId) {
+                return shared[fId].channel;
+            });
+            Store.getDeletedPads(null, {list: checkExpired}, waitFor(function (chans) {
+                if (chans && chans.error) { return void console.error(chans.error); }
+                if (!Array.isArray(chans) || !chans.length) { return; }
+                var toDelete = [];
+                Object.keys(shared).forEach(function (fId) {
+                    if (chans.indexOf(shared[fId].channel) !== -1
+                        && toDelete.indexOf(fId) === -1) {
+                        toDelete.push(fId);
+                    }
+                });
+                toDelete.forEach(function (fId) {
+                    var paths = userObject.findFile(Number(fId));
+                    userObject.delete(paths, waitFor(), true);
+                    delete shared[fId];
+                });
+            }));
+        }).nThen(function (waitFor) {
+            Object.keys(shared).forEach(function (id) {
+                var sf = shared[id];
+                var rt = loadSharedFolder(id, sf, waitFor());
+                handler(id, rt);
+            });
+        }).nThen(waitFor());
+    };
 
     return SF;
 });