justMusic/Sources/justMUSIC/lib/services/PostService.dart

import 'dart:convert';
import 'dart:io';

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:tuple/tuple.dart';
import 'package:firebase_storage/firebase_storage.dart';

import '../main.dart';

class PostService {
  createPost(String? description, String idMusic, File? image, Tuple2<String, String>? location) async {
    var id = MyApp.userViewModel.userCurrent.id;
    final post = <String, dynamic>{
      "user_id": id,
      "description": description,
      "date": DateTime.now(),
      "place": [location?.item1, location?.item2],
      "song_id": idMusic,
      "likes": 0
    };

    var postAdd = await MyApp.db.collection("posts").add(post);

    var userRef = MyApp.db.collection("users").doc(id);

    await MyApp.db.runTransaction((transaction) async {
      var userSnapshot = await transaction.get(userRef);
      if (userSnapshot.exists) {
        int currentNbCapsules = userSnapshot.data()?['nbCapsules'] ?? 0;
        transaction.update(userRef, {'nbCapsules': currentNbCapsules + 1});
        MyApp.userViewModel.userCurrent.capsules++;
      }
    });

    if (image != null) {
      var imageRef = FirebaseStorage.instance.ref('$id${postAdd.id}.jpg');
      await imageRef.putFile(image);
      var imageUrl = await imageRef.getDownloadURL();
      postAdd.update({"selfie": imageUrl});
    }
  }

  deletePost() {}

  getPostsById(String id) {}

  Future<List<QueryDocumentSnapshot<Map<String, dynamic>>>> getPopularPosts({int limit = 10, int offset = 0}) async {
    QuerySnapshot<Map<String, dynamic>> response =
        await FirebaseFirestore.instance.collection("posts").limit(limit).orderBy("likes").get();
    return response.docs;
  }
}