src/com/ranfa/lib/calc/PRPCalc.java

   1 package com.ranfa.lib.calc;
   2
   3 import java.io.IOException;
   4 import java.math.BigDecimal;
   5 import java.math.RoundingMode;
   6 import java.nio.file.Files;
   7 import java.nio.file.Paths;
   8 import java.util.List;
   9
  10 import org.slf4j.Logger;
  11 import org.slf4j.LoggerFactory;
  12
  13 import com.fasterxml.jackson.core.type.TypeReference;
  14 import com.fasterxml.jackson.databind.ObjectMapper;
  15
  16 public class PRPCalc {
  17
  18         private final Logger logger = LoggerFactory.getLogger(PRPCalc.class);
  19
  20         private static final String PRP_STORAGE_FILE_PATH = "generated/prp.json";
  21         private static final BigDecimal THAUSAND = BigDecimal.valueOf(1000);
  22
  23         private List<Integer> TotalPRPList;
  24         private int TotalPRP;
  25
  26         public PRPCalc() {
  27                 if(Files.notExists(Paths.get(PRP_STORAGE_FILE_PATH)))
  28                         generateEmptyPRPFile();
  29                 TypeReference<List<Integer>> typeref = new TypeReference<List<Integer>>() {};
  30                 try {
  31                         TotalPRPList = new ObjectMapper().readValue(Paths.get(PRP_STORAGE_FILE_PATH).toFile(), typeref);
  32                 } catch (IOException e) {
  33                         logger.error("Couldn't read prp file from disk.", e);
  34                 }
  35                 TotalPRP = calcCurrentTotal();
  36         }
  37
  38         public boolean generateEmptyPRPFile() {
  39                 if(Files.notExists(Paths.get("generated")))
  40                         try {
  41                                 Files.createDirectory(Paths.get("generated"));
  42                                 Files.createFile(Paths.get(PRP_STORAGE_FILE_PATH));
  43                         } catch (IOException e) {
  44                                 logger.error("cannot make prp file.", e);
  45                                 return false;
  46                         }
  47                 return true;
  48         }
  49
  50         public int calcCurrentTotal() {
  51                 int res = 0;
  52                 for(int val : TotalPRPList)
  53                         res += val;
  54                 return res;
  55         }
  56
  57         public int getTotalPRP() {
  58                 return TotalPRP;
  59         }
  60
  61         public static int calcPRPFromScore(int score) {
  62                 BigDecimal scoreDecimal = BigDecimal.valueOf(score);
  63                 return scoreDecimal.divide(THAUSAND, RoundingMode.DOWN).intValueExact();
  64         }
  65 }