i want to optimize queries call in a live chat. To achieve that i use Firebase RealTimeData. I know that RealTime identifies every new entry by chronological ordrer. Si i try to save my chat in the device’s memory everytime a user recup queries. To listen all changes (every New messages i put a listener query(docRef, limitToLast(1)) le méthode onChildAdded, this instructions allows me to take a snapshot of my last message. Will it be possible to get the index, or an indentification tag of it ? So that the next call , i can Fix limitToFirst to this index to that i recup the exact same missing part.Thanks in advance and don’t hesitate to ask me questions if i haven been clair enough. Good night everyone and good cood
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Hello everyone I'm new to coding but I want to code the bot mentioned in the title so my questions are:
-Is there a command that reads the game activity?
-What is the command that makes the bot move someone?
I set the basics up but don't really know where to go from here:
const Discord = require('discord.js');
const client = new Discord.Client();
client.once('ready', () => {
console.log('Online');
});
client.login('*the token*');
All of a user's game activities are stored as an array, activities, within the presence property of your user object.
For example, if you want to get the game statuses of the author of a message, you can use <message>.author.presence.activities to get that array. However, since a user may have multiple statuses (custom statuses, games, Rich Presences, etc), you'll generally want to get a specific activity.
If you need to check if the name of the status is a certain one, you'll need to get the specific index first, such as <message>.author.presence.activities[0].name. If you want to check each status and see if any of them align with a needed name, you can use a for...of loop.
For more information, here is the documentation on the presence of a user.
As for "moving someone," you are not giving any more explanation as to what you mean, so that should be implemented once your bot can properly detect certain games.
In the meantime, try following a guide on how to turn user input into actual commands, and then this may make more sense if you are still facing issues.
I am building a simple Chat App using Firebase and Ionic. I am trying to keep track of number of messages that are unread for different groups that the user is member of (like WhatsApp).
I have the messages linked to $scope through $firebaseArray
$scope.messages = $firebaseArray(<ref to message path in firebase>);
$scope.messages is iterated over and shown in the view. When a new message arrives it automatically shows up in the group being viewed. I want to keep track of messages not viewed. I am not quite sure of the best way to keep track of which messages the user has seen. I see suggestions here to keep track of timestamp when a user last visited a group but am wondering if there is a better/simpler solution to this.
The things that come to mind that I need to do are -
Setup some sort of monitoring for all groups the user is member of not just the one being viewed by the user. If user is member of 50 groups I need to monitor all 50 of them individually (wonder what, if any, performance implications that has). Here I will need to setup a child_added monitoring for each of the groups the user is member of
Track timestamp for last time a user was in a group
As the user switches groups, change the $firebaseArray to monitor the new group and cancel the $firebaseArray setup for the previous. Change the child_added monitoring for the new group to the group being viewed previously
If the user moves to another part of the app where he is not looking at any group messages (perhaps in a setting section) then again be aware of that and monitor all groups - remove the firebeaseArray from the group last being viewed and add a child_added monitoring when user moves away
If the user goes to another application and pushes the Chat application in the background then I am a little unsure of what to do
How does the code determine that the group whose messages the user was looking at is no longer active and new messages coming in now need to be counted
I am assuming I need to monitor for the App Pause and Resume events to address that. Is there a better way?
Trying to keep my code simple but feels like monitoring for unread messages is a significant chunk of work. Thanks for any ideas or pointers to sample code or to simplify this.
-S
thanks for taking time looking at my question.
Ok so I'm working on this iPhone app. I'm responsible for the server side code. Client side is asking for a solution to delete private messages from the app. I have created a HTTP DELETE for them that deletes a specific message. But this request deletes the message from the database and that makes the message disappear for both users and not only the one that have choosen to delete it.
I've been thinking but I can't seem to find the best solution for this. What I need is a solution to only delete the message for the current user.
Should I add some columns in the database that tells which user the private message should be shown for? And when a user deletes the message from the app it only stops showing on that users phone. Or is there a better solution for this?
I need help with some brainstorming. I hope it is an OK question.
Thanks!
A physical delete should probably be avoided. The first couple of reasons I can think of:
how can you do proper testing/audit if the information you're looking for is gone?
legal issues: do you need some levels of data retention?
You can implement some form of logical delete, for example with an extra relation such as UserMessage( UserID, MessageID, MessageStatus ), where MessageStatus could be "unread", "read", "deleted", "important", "spam", etc. (you can map the status to an arbitrary integer if you prefer). When a user deletes a message, you simply change its status in the UserMessage relation, and from the UI side you hide messages which are marked as "deleted".
SITUATION :
I have an application where i have to issue a gift cupon kind of a thing when the user reaches a certain score say 'x'.
I want to create a coupon with a unique QRcode, at the time the user reaches the score 'x' so that he can download it on his iphone and use it. Once it is used , the cupon should be invalidated. this applies to any user using the application. Meaning a coupon is created once the score is reached and deleted or invalidated once it is used.
ISSUE :
I'm not able to figure out how to create a cupon everytime any user reaches the score. Ofcourse, i did go through a lot of documentations and links like http://www.raywenderlich.com/20734/beginning-passbook-part-1. I also tried using pass-source but the valid account requires you to pay minimum about 8$.
As suggested in raywenderlich tutorials, i can create passes but thats not created through the application.
Also i didn't see any method where we can be notified when a user uses his issued coupon so that we can invalidate it.
Am i missing something here?
"Using" a QR code on a coupon means it is scanned by something else. That something else has to take responsibility to report the activity back to you, so you could then update the pass with an "Expired" flag in your database, re-sign and rebuild the pass, issue the push notification so that it would eventually update on the device. You'd also probably want that scanner-thingie to check with you to see that the code is valid before accepting it. So, yeah, not Apple's problem.
How can I fetch the avatars of all the contacts in a user's XMPP/Jabber roster?
I have previously asked this question, and while implementing the <presence> handler, I noticed that the presence items my app receives are of the form:
<presence to="me" from="contact">
...some other stuff here...
<x xmlns="vcard-temp:x:update"><photo>3FB991AA97D7701C21EAFE65FB866E4BFF1B927C</photo></x>
</presence>
The 3FB991AA97D7701C21EAFE65FB866E4BFF1B927C part looks like a SHA hash to me, but how can I get the actual avatar of the user in question?
vCard-based Avatars are specified in XEP-0153. You are correct that the photo element contains a SHA1 hash. Request the vCard of the person that sent you the hash:
<iq to='juliet#capulet.com'
type='get'
id='vc2'>
<vCard xmlns='vcard-temp'/>
</iq>
And fish the photo out of the response:
<iq to='romeo#montague.net/orchard'
type='result'
id='vc2'>
<vCard xmlns='vcard-temp'>
<PHOTO>
<TYPE>image/jpeg</TYPE>
<BINVAL>
Base64-encoded-avatar-file-here!
</BINVAL>
</PHOTO>
</vCard>
</iq>
You MUST cache based on that if you're going to use this protocol, and you'll really want to throttle how often you ask for avatars when you start up (particularly the first time a user logs in). Grabbing bajillions of avatars in a short amount of time will likely get you rate-limited by your server otherwise.
Also, be very careful about calculating your SHA1 hash. I've seen several clients that aren't terribly careful, who end up in an endless loop re-requesting the same avatar over and over.
I suggest negative-caching if you request an avatar and it doesn't match the hash you expect; cache the fact that you aren't going to get an answer for that hash, and don't ask for it again next time. The sender's SHA1 logic is likely wrong in some interesting way, and it's not going to get better the next time you ask.
Finally, some clients are written to try asking the sender's server for vCard data using XEP-0054 first as XEP-0153 says, then fall back on asking the sender's client directly by sending an IQ get for the vCard to the sender's full JID (user#domain/resource). Be prepared to deal with those requests on the sender's side.