Improve post checking when constructing timelines

posts.py

@@ -1735,10 +1735,21 @@ def createBoxBase(baseDir: str,boxname: str, \
         filePath = postFilename
         try:
             if os.path.isfile(filePath):
+                # is this a valid timeline post?
+                isPost=False
+                # must be a "Note" or "Announce" type
+                with open(filePath, 'r') as file:
+                    postStr = file.read()
+                if '"Note"' in postStr or '"Announce"' in postStr:
+                    isPost=True
+                    if boxname=='dm':
+                        if '#Public' in postStr or '/followers' in postStr:
+                            isPost=False
+
+                if isPost:
                     if currPage == pageNumber and postsOnPageCtr <= itemsPerPage:
                         # get the post as json
-                    with open(filePath, 'r') as fp:
-                        p=commentjson.load(fp)
+                        p = json.loads(postStr)
 
                         if boxname!='dm' or \
                            (boxname=='dm' and isDM(p)):
@@ -1766,6 +1777,7 @@ def createBoxBase(baseDir: str,boxname: str, \
                                         httpPrefix+'://'+domain+'/users/'+ \
                                         nickname+'/'+boxname+'?max_id='+ \
                                         postId+'&page=true'
+
                     # remember the last post filename for use with prev
                     prevPostFilename = postFilename
                     if postsOnPageCtr >= itemsPerPage: