make serverSupports() public

lib/imap.js

@@ -174,7 +174,7 @@ ImapConnection.prototype.connect = function(loginCb) {
         return loginCb(err);
       }
       // Next, get the list of available namespaces if supported (RFC2342)
-      if (!checkedNS && self._serverSupports('NAMESPACE')) {
+      if (!checkedNS && self.serverSupports('NAMESPACE')) {
         // Re-enter this function after we've obtained the available
         // namespaces
         checkedNS = true;
@@ -679,7 +679,7 @@ ImapConnection.prototype.connect = function(loginCb) {
       var recentCmd = requests[0].cmdstr;
       requests.shift();
       if (requests.length === 0 && recentCmd !== 'LOGOUT') {
-        if (state.status >= STATES.AUTH && self._serverSupports('IDLE')) {
+        if (state.status >= STATES.AUTH && self.serverSupports('IDLE')) {
           // According to RFC 2177, we should re-IDLE at least every 29
           // minutes to avoid disconnection by the server
           self._send('IDLE', undefined, true);
@@ -691,7 +691,7 @@ ImapConnection.prototype.connect = function(loginCb) {
               var timeDiff = Date.now() - state.ext.idle.timeStarted;
               if (timeDiff >= state.ext.idle.MAX_WAIT)
                 self._send('IDLE', undefined, true); // restart IDLE
-            } else if (!self._serverSupports('IDLE'))
+            } else if (!self.serverSupports('IDLE'))
               self._noop();
           }
         }, state.tmoKeepalive);
@@ -796,7 +796,7 @@ ImapConnection.prototype.getBoxes = function(namespace, cb) {
     cb = namespace;
     namespace = '';
   }
-  this._send((!this._serverSupports('XLIST') ? 'LIST' : 'XLIST')
+  this._send((!this.serverSupports('XLIST') ? 'LIST' : 'XLIST')
              + ' "' + utils.escape(utf7.encode(''+namespace)) + '" "*"', cb);
 };
 
@@ -896,7 +896,7 @@ ImapConnection.prototype._sort = function(which, sorts, options, cb) {
     throw new Error('Expected array with at least one sort criteria');
   if (!Array.isArray(options))
     throw new Error('Expected array for search options');
-  if (!this._serverSupports('SORT'))
+  if (!this.serverSupports('SORT'))
     return cb(new Error('Sorting is not supported on the server'));
 
   var criteria = sorts.map(function(criterion) {
@@ -1155,7 +1155,7 @@ ImapConnection.prototype._fetch = function(which, uids, options, what, cb) {
   }
 
   // always fetch GMail-specific bits of information when on GMail
-  if (this._serverSupports('X-GM-EXT-1'))
+  if (this.serverSupports('X-GM-EXT-1'))
     extensions = 'X-GM-THRID X-GM-MSGID X-GM-LABELS ';
 
   var cmd = which;
@@ -1233,7 +1233,7 @@ ImapConnection.prototype.delLabels = function(uids, labels, cb) {
 };
 
 ImapConnection.prototype._storeLabels = function(which, uids, labels, mode, cb) {
-  if (!this._serverSupports('X-GM-EXT-1'))
+  if (!this.serverSupports('X-GM-EXT-1'))
       throw new Error('Server must support X-GM-EXT-1 capability');
   if (this._state.status !== STATES.BOXSELECTED)
       throw new Error('No mailbox is currently selected');
@@ -1372,7 +1372,7 @@ ImapConnection.prototype.__defineGetter__('seq', function() {
 
 
 // Private/Internal Functions
-ImapConnection.prototype._serverSupports = function(capability) {
+ImapConnection.prototype.serverSupports = function(capability) {
   return (this.capabilities.indexOf(capability) > -1);
 };
 
@@ -1435,13 +1435,13 @@ ImapConnection.prototype._login = function(cb) {
       };
 
   if (this._state.status === STATES.NOAUTH) {
-    if (this._serverSupports('LOGINDISABLED'))
+    if (this.serverSupports('LOGINDISABLED'))
       return cb(new Error('Logging in is disabled on this server'));
 
-    if (this._serverSupports('AUTH=XOAUTH') && this._options.xoauth) {
+    if (this.serverSupports('AUTH=XOAUTH') && this._options.xoauth) {
       this._send('AUTHENTICATE XOAUTH ' + utils.escape(this._options.xoauth),
                  fnReturn);
-    } else if (this._serverSupports('AUTH=XOAUTH2') && this._options.xoauth2) {
+    } else if (this.serverSupports('AUTH=XOAUTH2') && this._options.xoauth2) {
       this._send('AUTHENTICATE XOAUTH2 ' + utils.escape(this._options.xoauth2),
                  fnReturn);
     } else if (this._options.username && this._options.password) {