Rating

UpdateRating.java

 /**
     * this method used to update rating of product
     *
     * @param reviewModel
     * @param productModel
     */
    private void updateRating(ReviewModel reviewModel, ProductModel productModel) {
        ProductModel rate = new ProductModel();
        rate.setIdProduct(productModel.getIdProduct());
        rate.setProductName(productModel.getProductName());

        //update stars
        double totalStars;
        int totalVoters = 0;
        if (reviewModel.getTotalStarGiven() == 1.0) {
            totalStars = 1.0 + (double) productModel.getStar1();
            rate.setStar1((int) totalStars);
            rate.setStar2(productModel.getStar2());
            rate.setStar3(productModel.getStar3());
            rate.setStar4(productModel.getStar4());
            rate.setStar5(productModel.getStar5());

            totalVoters = (int) (totalStars + productModel.getStar2() + productModel.getStar3() + productModel.getStar4() + productModel.getStar5());
            if (productModel.getTotalVoters() == 0) {
                rate.setTotalVoters(1);
            } else {
                rate.setTotalVoters(totalVoters);
            }
        } else if (reviewModel.getTotalStarGiven() == 2.0) {
            totalStars = 1.0 + (double) productModel.getStar2();
            rate.setStar1(productModel.getStar1());
            rate.setStar2((int) totalStars);
            rate.setStar3(productModel.getStar3());
            rate.setStar4(productModel.getStar4());
            rate.setStar5(productModel.getStar5());

            totalVoters = (int) (totalStars + productModel.getStar1() + productModel.getStar3() + productModel.getStar4() + productModel.getStar5());
            if (productModel.getTotalVoters() == 0) {
                rate.setTotalVoters(1);
            } else {
                rate.setTotalVoters(totalVoters);
            }
        } else if (reviewModel.getTotalStarGiven() == 3.0) {
            totalStars = 1.0 + (double) productModel.getStar3();
            rate.setStar1(productModel.getStar1());
            rate.setStar2(productModel.getStar2());
            rate.setStar3((int) totalStars);
            rate.setStar4(productModel.getStar4());
            rate.setStar5(productModel.getStar5());

            totalVoters = (int) (totalStars + productModel.getStar1() + productModel.getStar2() + productModel.getStar4() + productModel.getStar5());
            if (productModel.getTotalVoters() == 0) {
                rate.setTotalVoters(1);
            } else {
                rate.setTotalVoters(totalVoters);
            }
        } else if (reviewModel.getTotalStarGiven() == 4.0) {
            totalStars = 1.0 + (double) productModel.getStar4();
            rate.setStar1(productModel.getStar1());
            rate.setStar2(productModel.getStar2());
            rate.setStar3(productModel.getStar3());
            rate.setStar4((int) totalStars);
            rate.setStar5(productModel.getStar5());

            totalVoters = (int) (totalStars + productModel.getStar1() + productModel.getStar2() + productModel.getStar3() + productModel.getStar5());
            if (productModel.getTotalVoters() == 0) {
                rate.setTotalVoters(1);
            } else {
                rate.setTotalVoters(totalVoters);
            }
        } else if (reviewModel.getTotalStarGiven() == 5.0) {
            totalStars = 1.0 + (double) productModel.getStar5();
            rate.setStar1(productModel.getStar1());
            rate.setStar2(productModel.getStar2());
            rate.setStar3(productModel.getStar3());
            rate.setStar4(productModel.getStar4());
            rate.setStar5((int) totalStars);

            totalVoters = (int) (totalStars + productModel.getStar1() + productModel.getStar2() + productModel.getStar3() + productModel.getStar4());
            if (productModel.getTotalVoters() == 0) {
                rate.setTotalVoters(1);
            } else {
                rate.setTotalVoters(totalVoters);
            }
        }

        //update rate
        int totalStar1 = rate.getStar1() * 1;
        int totalStar2 = rate.getStar2() * 2;
        int totalStar3 = rate.getStar3() * 3;
        int totalStar4 = rate.getStar4() * 4;
        int totalStar5 = rate.getStar5() * 5;

        double sumOfStars = totalStar1 + totalStar2 + totalStar3 + totalStar4 + totalStar5;
        double totalRating = sumOfStars / (double) totalVoters;
        DecimalFormat format = new DecimalFormat(".#");
        rate.setTotalRating(Double.parseDouble(format.format(totalRating)));

        CollectionReference collectionReference = firebaseFirestore.collection("product");
        collectionReference.document(productModel.getIdProduct())
                .set(rate)
                .addOnSuccessListener(aVoid -> {
                    progressDialog.dismiss();
                    Toast.makeText(ReviewActivity.this, "Successfully update Rating", Toast.LENGTH_SHORT).show();
                    productModelGlobal = rate;
                
                    //after success, then update the rating color and populate the recyclerview with the data of reviews
                    setRatingByColor(rate);
                    getAllReview(productModel.getIdProduct());
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        progressDialog.dismiss();
                        Toast.makeText(ReviewActivity.this, "Failed Update Rating : " + e.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                });
    }