refactor(sync): add sync strategy

include/libs/sync/syncTools.h

@@ -644,6 +644,7 @@ typedef int32_t (*FpOnSnapshotRspCb)(SSyncNode* ths, SyncSnapshotRsp* pMsg);
 
 // option ----------------------------------
 bool          syncNodeSnapshotEnable(SSyncNode* pSyncNode);
+ESyncStrategy syncNodeStrategy(SSyncNode* pSyncNode);
 
 // ---------------------------------------------
 

source/dnode/mnode/impl/src/mndMain.c

@@ -427,7 +427,7 @@ int32_t mndProcessSyncMsg(SRpcMsg *pMsg) {
   } while (0);
 
   // ToDo: ugly! use function pointer
-  if (syncNodeSnapshotEnable(pSyncNode)) {
+  if (syncNodeStrategy(pSyncNode) == SYNC_STRATEGY_STANDARD_SNAPSHOT) {
     if (pMsg->msgType == TDMT_SYNC_TIMEOUT) {
       SyncTimeout *pSyncMsg = syncTimeoutFromRpcMsg2(pMsg);
       code = syncNodeOnTimeoutCb(pSyncNode, pSyncMsg);

source/dnode/vnode/src/vnd/vnodeSync.c

@@ -258,7 +258,7 @@ int32_t vnodeProcessSyncReq(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
 
     // ToDo: ugly! use function pointer
     // use different strategy
-    if (syncNodeSnapshotEnable(pSyncNode)) {
+    if (syncNodeStrategy(pSyncNode) == SYNC_STRATEGY_NO_SNAPSHOT) {
       if (pRpcMsg->msgType == TDMT_SYNC_TIMEOUT) {
         SyncTimeout *pSyncMsg = syncTimeoutFromRpcMsg2(pRpcMsg);
         ASSERT(pSyncMsg != NULL);

source/libs/sync/inc/syncInt.h

@@ -175,6 +175,7 @@ int32_t    syncNodeProposeBatch(SSyncNode* pSyncNode, SRpcMsg* pMsgArr, bool* pI
 
 // option
 bool          syncNodeSnapshotEnable(SSyncNode* pSyncNode);
+ESyncStrategy syncNodeStrategy(SSyncNode* pSyncNode);
 SyncIndex     syncNodeGetSnapshotConfigIndex(SSyncNode* pSyncNode, SyncIndex snapshotLastApplyIndex);
 
 // ping --------------

source/libs/sync/src/syncMain.c

@@ -1100,7 +1100,9 @@ void syncNodeClose(SSyncNode* pSyncNode) {
 }
 
 // option
-bool syncNodeSnapshotEnable(SSyncNode* pSyncNode) { return pSyncNode->pRaftCfg->snapshotEnable; }
+// bool syncNodeSnapshotEnable(SSyncNode* pSyncNode) { return pSyncNode->pRaftCfg->snapshotEnable; }
+
+ESyncStrategy syncNodeStrategy(SSyncNode* pSyncNode) { return pSyncNode->pRaftCfg->snapshotEnable; }
 
 // ping --------------
 int32_t syncNodePing(SSyncNode* pSyncNode, const SRaftId* destRaftId, SyncPing* pMsg) {