private void parseCommentsJSON(InputStream in) throws IOException, JsonParseException {
int insertedCommentIndex;
String genericListingError = "Not a comments listing";
try {
Listing[] listings = mObjectMapper.readValue(in, Listing[].class);
// listings[0] is a thread Listing for the OP.
// process same as a thread listing more or less
Assert.assertEquals(Constants.JSON_LISTING, listings[0].getKind(), genericListingError);
// Save modhash, ignore "after" and "before" which are meaningless in this context (and
// probably null)
ListingData threadListingData = listings[0].getData();
if (StringUtils.isEmpty(threadListingData.getModhash())) mSettings.setModhash(null);
else mSettings.setModhash(threadListingData.getModhash());
if (Constants.LOGGING)
Log.d(TAG, "Successfully got OP listing[0]: modhash " + mSettings.getModhash());
ThingListing threadThingListing = threadListingData.getChildren()[0];
Assert.assertEquals(Constants.THREAD_KIND, threadThingListing.getKind(), genericListingError);
// listings[1] is a comment Listing for the comments
ListingData commentListingData = listings[1].getData();
if (isInsertingEntireThread()) {
parseOP(
threadThingListing.getData(),
commentListingData.getChildren().length == 0
? null
: commentListingData.getChildren()[0].getData());
insertedCommentIndex = 0; // we just inserted the OP into position 0
if (!StringUtils.isEmpty(mJumpToCommentId) && mJumpToCommentContext > 0) {
// If viewing context, then the 'first' item will be the context-viewing warning.
insertedCommentIndex++;
}
// at this point we've started displaying comments, so disable the loading screen
disableLoadingScreenKeepProgress();
} else {
insertedCommentIndex = mPositionOffset - 1; // -1 because we +1 for the first comment
}
// Go through the children and get the ThingInfos
for (ThingListing commentThingListing : commentListingData.getChildren()) {
// insert the comment and its replies, prefix traversal order
insertedCommentIndex =
insertNestedComment(commentThingListing, 0, insertedCommentIndex + 1);
}
mProcessCommentsTask.mergeLowPriorityListToMainList();
} catch (Exception ex) {
if (Constants.LOGGING) Log.e(TAG, "parseCommentsJSON", ex);
}
}
private boolean isHasJumpTarget() {
return !StringUtils.isEmpty(mJumpToCommentId);
}
// XXX: maxComments is unused for now
public Boolean doInBackground(Integer... maxComments) {
HttpEntity entity = null;
try {
StringBuilder sb = new StringBuilder(Constants.REDDIT_BASE_URL);
if (mSubreddit != null) {
sb.append("/r/").append(mSubreddit.trim());
}
if (mMoreChildrenId != null && mMoreChildrenId.length() > 0) {
sb.append("/comments/")
.append(mThreadId)
.append("/z/")
.append(mMoreChildrenId)
.append("/.json?")
.append(mSettings.getCommentsSortByUrl());
// Loading more with context makes no sense
} else {
sb.append("/comments/")
.append(mThreadId)
.append("/.json?")
.append(mSettings.getCommentsSortByUrl());
if (!StringUtils.isEmpty(mJumpToCommentId) && mJumpToCommentContext > 0) {
sb.append("&comment=")
.append(mJumpToCommentId)
.append("&context=")
.append(mJumpToCommentContext);
}
}
String url = sb.toString();
if (Constants.LOGGING) Log.d(TAG, "Loading comments from URL: " + url);
InputStream in = null;
boolean currentlyUsingCache = false;
if (Constants.USE_COMMENTS_CACHE) {
try {
if (CacheInfo.checkFreshThreadCache(mActivity.getApplicationContext())
&& url.equals(CacheInfo.getCachedThreadUrl(mActivity.getApplicationContext()))) {
in = mActivity.openFileInput(Constants.FILENAME_THREAD_CACHE);
mContentLength = mActivity.getFileStreamPath(Constants.FILENAME_THREAD_CACHE).length();
currentlyUsingCache = true;
if (Constants.LOGGING) Log.d(TAG, "Using cached thread JSON, length=" + mContentLength);
}
} catch (Exception cacheEx) {
if (Constants.LOGGING) Log.w(TAG, "skip cache", cacheEx);
}
}
// If we couldn't use the cache, then do HTTP request
if (!currentlyUsingCache) {
HttpGet request = new HttpGet(url);
HttpResponse response = mClient.execute(request);
// Read the header to get Content-Length since entity.getContentLength() returns -1
Header contentLengthHeader = response.getFirstHeader("Content-Length");
if (contentLengthHeader != null) {
mContentLength = Long.valueOf(contentLengthHeader.getValue());
if (Constants.LOGGING) Log.d(TAG, "Content length: " + mContentLength);
} else {
mContentLength = -1;
if (Constants.LOGGING) Log.d(TAG, "Content length: UNAVAILABLE");
}
entity = response.getEntity();
in = entity.getContent();
if (Constants.USE_COMMENTS_CACHE) {
in =
CacheInfo.writeThenRead(
mActivity.getApplicationContext(), in, Constants.FILENAME_THREAD_CACHE);
try {
CacheInfo.setCachedThreadUrl(mActivity.getApplicationContext(), url);
} catch (IOException e) {
if (Constants.LOGGING) Log.e(TAG, "error on setCachedThreadId", e);
}
}
}
// setup a special InputStream to report progress
ProgressInputStream pin = new ProgressInputStream(in, mContentLength);
pin.addPropertyChangeListener(this);
parseCommentsJSON(pin);
if (Constants.LOGGING) Log.d(TAG, "parseCommentsJSON completed");
pin.close();
in.close();
return true;
} catch (Exception e) {
if (Constants.LOGGING) Log.e(TAG, "DownloadCommentsTask", e);
} finally {
if (entity != null) {
try {
entity.consumeContent();
} catch (Exception e2) {
if (Constants.LOGGING) Log.e(TAG, "entity.consumeContent()", e2);
}
}
}
return false;
}