[libcontacts] Track whether contacts have valid IM accounts

Although QContactStatusFlags reports whether an account has any IM
accounts configured, we need to also know whether any of those accounts
are connected to valid telepathy accounts.

src/seasidecache.cpp

@@ -1854,6 +1854,9 @@ bool SeasideCache::updateContactIndexing(const QContact &oldContact, const QCont
                 oldAddresses.insert(address);
         }
 
+        // Keep track of whether this contact has any valid IM accounts
+        bool hasValid = false;
+
         foreach (const QContactOnlineAccount &account, contact.details<QContactOnlineAccount>()) {
             const StringPair address(addressPair(account));
             if (!validAddressPair(address))
@@ -1865,6 +1868,13 @@ bool SeasideCache::updateContactIndexing(const QContact &oldContact, const QCont
             }
 
             m_onlineAccountIds[address] = iid;
+            hasValid = true;
+        }
+
+        if (hasValid) {
+            item->statusFlags |= HasValidOnlineAccount;
+        } else {
+            item->statusFlags &= ~HasValidOnlineAccount;
         }
 
         if (!oldAddresses.isEmpty()) {

src/seasidecache.h

@@ -117,6 +117,11 @@ class CONTACTCACHE_EXPORT SeasideCache : public QObject
         ContactComplete
     };
 
+    enum {
+        // Must be after the highest bit used in QContactStatusFlags::Flag
+        HasValidOnlineAccount = (QContactStatusFlags::IsOnline << 1)
+    };
+
     struct ItemData
     {
         virtual ~ItemData() {}