Develop Reference

Getting channel subscriptions list by Youtube Data Api

Is there any way to order the subscription list of Youtube channels by recently subscribed?
youtube
.subscriptions()
.list("snippet")
.setOrder("")// relevance, unread, alphabetical
.setMaxResults((long) 1000) // it is not affecting, the max limit is 50
.setMine(true)
.execute();
According to documents, I can only get max 50 items at a time, and I have only three order type parameters relevance, unread, alphabetical.
But I need to reach the channel I subscribed lastly. I would be really appreciated it if anybody helps me to handle this.
Thanks in advance!

According to the docs, you have the following parameter at your disposal:
myRecentSubscribers (boolean)
This parameter can only be used in a properly authorized request. Set this parameter's value to true to retrieve a feed of the subscribers of the authenticated user in reverse chronological order (newest first).
Note that this parameter only supports retrieval of the most recent 1000 subscribers to the authenticated user's channel. To retrieve a complete list of subscribers, use the mySubscribers parameter. That parameter, which does not return subscribers in a particular order, does not limit the number of subscribers that can be retrieved.
That is: do insert something like .setMyRecentSubscribers(true) in the sequence of setters of your code above. (Also you may remove the setChannelId setter call, since, by requiring from you to be authorized to invoke this endpoint, the API already knows the channel to which your call is referring to.)
Note also that the parameter's maxResults maximum value is 50. To receive only the most recent subscriber have .setMaxResults(1) in the setter sequence above.
If your want to obtain the list of all your subscriptions then there's the following parameter:
mine (boolean)
This parameter can only be used in a properly authorized request. Set this parameter's value to true to retrieve a feed of the authenticated user's subscriptions.
Have .setMine(true) (without .setChannelId) in your setters sequence.
You will have to invoke repeatedly the API's endpoint to get all of your subscriptions, since this endpoint provides paginated result sets. Upon obtaining all those subscriptions, sort them by snippet.publishedAt.
If you're only interested to obtain the most recent channel to which to have subscribed, instead of the sort algorithm, is sufficient to use the max algorithm (O(n) instead of O(n log n)) on the same property.
For an example of how to implement pagination in your code, have a look at some of the sample code provided by Google itself.

As I understand from your question, you want to check if you are following a specific youtube channel with help of Youtube Data API V3.
For that it is mentioned in the document that you can use forChannelId parameter.
Also Youtube Data API has a playground to let you see the results of your query. You can simply put a channelId in forChannelId field and result will return an empty array if you are not subscribed specified channel or result will return the data of that specified channel if you are subscribed to it.
You can do a simple request from your Java app to get results. In this code example I'm checking if authorized youtube API user is subscribed to Firebase Youtube Channel or not.
SubscriptionListResponse response = request.setForChannelId("UC_x5XG1OV2P6uZZ5FSM9Ttw")
.setMine(true)
.execute();
And response will include details of specified channel in the request you will make. I also share response of the request I shared above.
{
"kind": "youtube#SubscriptionListResponse",
"etag": "zCQ7lTwIBgdyVsQmbymEu-fUgjU",
"pageInfo": {
"totalResults": 1,
"resultsPerPage": 5
},
"items": [
{
"kind": "youtube#subscription",
"etag": "A-G_B0BnSqn7XtJi7BgHJEk9L3Q",
"id": "uTEDDg6jpPBwnsim9moHkataEljshwFopudOgIy34nk",
"snippet": {
"publishedAt": "2020-07-08T14:02:43.789000Z",
"title": "Google Developers",
"description": "The Google Developers channel features talks from events, educational series, best practices, tips, and the latest updates across our products and platforms.",
"resourceId": {
"kind": "youtube#channel",
"channelId": "UC_x5XG1OV2P6uZZ5FSM9Ttw"
},
"channelId": "UCC77fYySvfP7p-6QGaa-3lw",
"thumbnails": {
"default": {
"url": "https://yt3.ggpht.com/-Fgp8KFpgQqE/AAAAAAAAAAI/AAAAAAAAAAA/Wyh1vV5Up0I/s88-c-k-no-mo-rj-c0xffffff/photo.jpg"
},
"medium": {
"url": "https://yt3.ggpht.com/-Fgp8KFpgQqE/AAAAAAAAAAI/AAAAAAAAAAA/Wyh1vV5Up0I/s240-c-k-no-mo-rj-c0xffffff/photo.jpg"
},
"high": {
"url": "https://yt3.ggpht.com/-Fgp8KFpgQqE/AAAAAAAAAAI/AAAAAAAAAAA/Wyh1vV5Up0I/s800-c-k-no-mo-rj-c0xffffff/photo.jpg"
}
}
}
}
]
}

REST best practice get /articles for guest and for auth?

I've read that Get requests should be idempotent.
I'm making an android app with a list of articles. Both guest and authenticated users can view a list of articles, but authenticated also get favorited status.
To make a request idempotent, the authenticated user should request both /articles and a second request to get the favorite status of this article.
How professional developers make these things? What is the best practice?
I see 3 ways:
Return a combined result based on the user. for guests favorited: 0, for authenticated if favorited, favorited: 1
GET /articles (statefull)
[
{
"id":1,
"title":"First Article",
"favorited":1
},
{
"id":2,
"title":"Second Article",
"favorited":0
},
{
"id":3,
"title":"Third Article",
"favorited":1
}
]
Return stateless and make ​additional request to check the favorited status for this article ids if authenticated.
GET /articles (stateless)
[
{
"id":1,
"title":"First Article"
},
{
"id":2,
"title":"Second Article"
},
{
"id":3,
"title":"Third Article"
}
]
if authenticated get favorite statuses for article id 1, 2 and 3
GET /favorites?id=1,2,3
[
{
"id":1,
"favorited":1
},
{
"id":2,
"favorited":0
},
{
"id":3,
"favorited":1
}
]
Return stateless. After login user need to request endpoint to get all favorited ids, save them in the local client, and on every item display check from local if post id is favorite. Note some users have 300+ favorited articles
After login get all favorited ids, save in client.
GET /myFavoriteArticleIds
[
1,
3,
5,
9,
17
]
And then make stateless requests
GET /articles (stateless)
[
{
"id":1,
"title":"First Article"
},
{
"id":2,
"title":"Second Article"
},
{
"id":3,
"title":"Third Article"
}
]

You should be using only one API request GET /api/articles. Authorized requests should have the Authorization header value. Based on that the response could be filtered while serializing the result object.
We can have customized responses from API based on the Authorization header.
Refer to Baeldung - https://www.baeldung.com/jackson-serialize-field-custom-criteria

It would perhaps help to review the definitions of safe and idempotent as found in RFC 7231. The semantics of GET are safe, which means that all of the constraints of idempotent are satisfied, and some others.
In summary, safe means read-only.
But it doesn't tell you anything about representations, or resource design.
How professional developers make this things? What is best practice?
Think about how you would design a web site? One answer would be to have a page for anonymous users, and then a different page for administrators (which includes the extra information that the administrators need). The second page would be locked down so that only authorized users can get at it (which has some interesting implications for caching).
The same basic principles hold for an API.

To distinguish the difference between guest and authenticated cases, I would recommend you to use namespaces for all APIs.
Ex:
For authenticated users,
/api/articles - list of articles along with favorites
/api/articles/$article_id - single article information along with favorited time etc
For guest users,
/guest_api/articles - only the list of articles
/guest_api/articles/$article_id - only the article information

Based on the user type, the favorited flag can be returned in response.
User type can be passed a query parameter.
Example: GET /api/v1/articles?user=guest

How to redirect two different users to different activity after login using firebase auth

I am creating an android application using the Firebase authentication and database.
For my app I need to identify the users after they logged in and redirect them to two different activities. (admin/simple user)
In my app I have only 10-20 users all time, and there isn't a way to register, it's a company only app.
Thanks for help.

If max users you expect is 20 then why would you need a authentication usage ( Google, Facebook ) etc. Have a simple database entry for all users as follows:
{
"app_title": "YourApp",
"users": {
"-KTYWvZG4Qn9ZYTc47O6": {
"username": "pkondedath",
"useremail": "hello#kondedath.com",
"password" : "hello123"
"userpic": "example.com/a.png",
"prevelidge" : "superuser"
},
"-KTYWvZG466ADFRR667": {
"username": "someone",
"useremail": "hello2#kondedath.com",
"password" : "hello1234"
"userpic": "example.com/b.png",
"prevelidge" : "normal"
}
}
}
Provide a user to input username( unique) and password and search through database to see if username and password matches and check his/her prevelidge and redirect to particular activity appropriately.
eg
mFirebaseRef = new Firebase("https://yourapp.firebaseio.com/").child("users")
Use above database reference to search users. You can also use the same to add new user. When adding a new user, give them default prevelidge.
This model fits well for less userbase like 20.
For more user bases( thousands, millions) you can use google authentication and use the User UID returned and create a new entry in your database(users).
Hope this helps you.

Nesting stars in Firebase Database

I find Firebase Database sample very helpful, but I noticed something which worries me a little bit.
I mean in this example user can give star to the post, something like "Like it" on Facebook. In provided sample they nested stars into post, so we have sample object like this:
"post_id" : {
"author": "username",
"body": "Some content",
"starCount": 1
"stars" : {
"user_id_who_gave_star" : "true"
}
"title": "Some title",
"uid": "author_id"
}
Such solution has many advantages, like e.g. we can check if have already gave star and hide or change icon, or we can one transaction to change "starCount" and add next value to "stars".
But the problem is when we have big application and 1000 users gave star, so everytime when we download post data we download 1000 userIds which may be not best solution.
Question
My question is, what is best approach for such applications and have someone tested how Firebase works in this situation?

firebaser here
When writing the examples for our documentation, we always have to balance the need for having enough context, keeping the example small enough , and following our own best practices.
This is indeed one of the cases where we violate one of our own best practices "not nesting data". As you said: this means that a user downloading a post, gets all the UIDs of users that liked that post.
As the usage of the application scales, that may become a concern. If that is the case for your app, you should model the "users who upvoted a post" as a separate top-level node:
"posts": {
"post_id" : {
"author": "username",
"body": "Some content",
"starCount": 1
"title": "Some title",
"uid": "author_id"
}
},
"upvotes": {
"post_id" : {
"user_id_who_gave_star" : "true"
}
}

Get specific type of events Facebook using graph API

I am trying to get only sport type facebook events.
I am retreiving my events using the query below, but I want to filter these out by category. I have tried nested fields but I can't get the ones I need, I get everything back.
search?q=Brasov&type=event&fields=name,start_time,id,cover,owner
The events I am looking for have this category in the owner field.
"category": "Sports/recreation/activities",
"category_list": [
{
"id": "186982054657561",
"name": "Sports & Recreation"
}
Do you know any way I can get only the events that have this category_list id ?

That is not currently possible. I would suggest you to store the events you received from the API call and do a filter on your server (or client).