public static ChanReaderRequest newInstance(
Loadable loadable,
List<Post> cached,
Listener<List<Post>> listener,
ErrorListener errorListener) {
String url;
if (loadable.isBoardMode()) {
url = ChanUrls.getPageUrl(loadable.board, loadable.no);
} else if (loadable.isThreadMode()) {
url = ChanUrls.getThreadUrl(loadable.board, loadable.no);
} else if (loadable.isCatalogMode()) {
url = ChanUrls.getCatalogUrl(loadable.board);
} else {
throw new IllegalArgumentException("Unknown mode");
}
ChanReaderRequest request = new ChanReaderRequest(url, listener, errorListener);
// Copy the loadable and cached list. The cached array may changed/cleared by other threads.
request.loadable = loadable.copy();
request.cached = new ArrayList<>(cached);
return request;
}
@Override
public List<Post> readJson(JsonReader reader) throws Exception {
List<Post> list;
if (loadable.isBoardMode()) {
list = loadBoard(reader);
} else if (loadable.isThreadMode()) {
list = loadThread(reader);
} else if (loadable.isCatalogMode()) {
list = loadCatalog(reader);
} else {
throw new IllegalArgumentException("Unknown mode");
}
return processPosts(list);
}
private List<Post> processPosts(List<Post> serverList) throws Exception {
List<Post> totalList = new ArrayList<>(serverList.size());
if (cached.size() > 0) {
totalList.addAll(cached);
// If there's a cached post but it's not in the list received from the server, mark it as
// deleted
if (loadable.isThreadMode()) {
boolean serverHas;
for (Post cache : cached) {
serverHas = false;
for (Post b : serverList) {
if (b.no == cache.no) {
serverHas = true;
break;
}
}
cache.deleted = !serverHas;
}
}
// If there's a post in the list from the server, that's not in the cached list, add it.
boolean known;
for (Post post : serverList) {
known = false;
for (Post cache : cached) {
if (cache.no == post.no) {
known = true;
break;
}
}
// serverPost is not in finalList
if (!known) {
totalList.add(post);
}
}
// Sort if it got out of order due to posts disappearing/reappearing
/*if (loadable.isThreadMode()) {
Collections.sort(totalList, new Comparator<Post>() {
@Override
public int compare(Post lhs, Post rhs) {
return lhs.time == rhs.time ? 0 : (lhs.time < rhs.time ? -1 : 1);
}
});
}*/
} else {
totalList.addAll(serverList);
}
Set<Integer> invalidatedPosts = new HashSet<>();
for (Post post : totalList) {
if (!post.deleted) {
post.repliesFrom.clear();
for (Post other : totalList) {
if (other.repliesTo.contains(post.no) && !other.deleted) {
post.repliesFrom.add(other.no);
}
}
} else {
post.repliesTo.clear();
for (int no : post.repliesFrom) {
invalidatedPosts.add(no);
}
post.repliesFrom.clear();
}
}
for (int no : invalidatedPosts) {
for (Post post : totalList) {
if (post.no == no) {
if (!post.finish()) {
throw new IOException("Incorrect data about post received.");
}
break;
}
}
}
for (Post post : totalList) {
post.isSavedReply = ChanApplication.getDatabaseManager().isSavedReply(post.board, post.no);
}
return totalList;
}