(fix) check if EAS identity is ok and use it (fixes #3698)

ActiveSync/SOGoActiveSyncDispatcher.m

@@ -2694,6 +2694,38 @@ void handle_eas_terminate(int signum)
   return nil;
 }
 
+- (BOOL) _isEMailValid: (NSString *) email
+{
+  NSArray *identities;
+  int i;
+
+  identities = [[context activeUser] allIdentities];
+
+  for (i = 0; i < [identities count]; i++)
+    {
+      if ([email isEqualToString: [[identities objectAtIndex: i] objectForKey: @"email"]])
+	return YES;
+    }
+
+  return NO;
+}
+
+- (NSString *) _fullNameForEMail: (NSString *) email
+{
+  NSArray *identities;
+  int i;
+
+  identities = [[context activeUser] allIdentities];
+
+  for (i = 0; i < [identities count]; i++)
+    {
+      if ([email isEqualToString: [[identities objectAtIndex: i] objectForKey: @"email"]])
+	return [[identities objectAtIndex: i] objectForKey: @"fullName"];
+    }
+
+  return nil;
+}
+
 //
 //
 //
@@ -2707,10 +2739,12 @@ void handle_eas_terminate(int signum)
   NSData *new_from_header;
   NSDictionary *identity;
   NSString *fullName, *email;
+  NSArray *from;
 
   const char *bytes;
   int i, e, len;
   BOOL found_header;
+  email = nil;
   
   // We get the mail's data
   data = [NSMutableData dataWithData: [[[[(id)[theDocumentElement getElementsByTagName: @"MIME"] lastObject] textValue] stringByDecodingBase64] dataUsingEncoding: NSUTF8StringEncoding]];
@@ -2720,10 +2754,25 @@ void handle_eas_terminate(int signum)
   message = [parser parsePartFromData: data];
   RELEASE(parser);
 
-  identity = [[context activeUser] primaryIdentity];
+  from = [message headersForKey: @"from"];
 
+  if (![from count] || ![self _isEMailValid: [[from objectAtIndex: 0] pureEMailAddress]] ||
+      [[[from objectAtIndex: 0] pureEMailAddress] isEqualToString: [from objectAtIndex: 0]] ||
+      [[NSString stringWithFormat: @"<%@>", [[from objectAtIndex: 0] pureEMailAddress]] isEqualToString: [from objectAtIndex: 0]])
+    {
+      if ([from count] && [self _isEMailValid: [[from objectAtIndex: 0] pureEMailAddress]])
+        {
+          // We have a valid email address, lets fill in the fullname.
+          email = [[from objectAtIndex: 0] pureEMailAddress];
+          fullName = [self _fullNameForEMail: email];
+        }
+      else
+        {
+          // Fallback to primary identity.
+          identity = [[context activeUser] primaryIdentity];
           fullName = [identity objectForKey: @"fullName"];
           email = [identity objectForKey: @"email"];
+        }
 
       if ([fullName length])
         new_from_header = [[NSString stringWithFormat: @"From: %@ <%@>\r\n", [fullName asQPSubjectString: @"utf-8"], email] dataUsingEncoding: NSUTF8StringEncoding];
@@ -2796,6 +2845,7 @@ void handle_eas_terminate(int signum)
                           withBytes: [new_from_header bytes]
                              length: [new_from_header length]];
         }
+    }
 
   error = [self _sendMail: data
                recipients: [message allRecipients]
@@ -2933,7 +2983,7 @@ void handle_eas_terminate(int signum)
       NSMutableArray *attachments, *references;
 
       id body, bodyFromSmartForward, htmlPart, textPart;
-      NSString *fullName, *email, *charset, *s;
+      NSString *fullName, *email, *charset, *s, *from;
       NSDictionary *identity;
 
       int a;
@@ -2959,14 +3009,32 @@ void handle_eas_terminate(int signum)
       map = [NGHashMap hashMapWithDictionary: [messageFromSmartForward headers]];
       [map setObject: @"multipart/mixed"  forKey: @"content-type"];
 
+      from = [map objectForKey: @"from"];
+
+      if (![from length] || ![self _isEMailValid: [from pureEMailAddress]] ||
+          [[from pureEMailAddress] isEqualToString: from] ||
+          [[NSString stringWithFormat: @"<%@>", [from pureEMailAddress]] isEqualToString: from])
+        {
+          if ([from length] && [self _isEMailValid: [from pureEMailAddress]])
+            {
+              // We have a valid email address, lets fill in the fullname.
+              email = [from pureEMailAddress];
+              fullName = [self _fullNameForEMail: email];
+            }
+          else
+            {
+              // Fallback to primary identity.
               identity = [[context activeUser] primaryIdentity];
 
               fullName = [identity objectForKey: @"fullName"];
               email = [identity objectForKey: @"email"];
+            }
+
           if ([fullName length])
             [map setObject: [NSString stringWithFormat: @"%@ <%@>", fullName, email]  forKey: @"from"];
           else
             [map setObject: email forKey: @"from"];
+        }
 
       if ([mailObject messageId])
         {