Merge pull request #177 from justppy027/exammap

ExamMap

Author: TelephoneTan

app/src/main/java/com/telephone/coursetable/ExamMap.java

@@ -0,0 +1,89 @@
+package com.telephone.coursetable;
+
+import androidx.annotation.NonNull;
+
+import com.telephone.coursetable.Clock.Clock;
+import com.telephone.coursetable.Database.ExamInfo;
+import com.telephone.coursetable.Database.ExamInfoDao;
+
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+public class ExamMap {
+
+    static class key_exam{
+        @NonNull
+        String courseno;
+        long sts;
+        long ets;
+
+        public key_exam(@NonNull String courseno, long sts, long ets) {
+            this.courseno = courseno;
+            this.sts = sts;
+            this.ets = ets;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            key_exam key_exam = (key_exam) o;
+            return sts == key_exam.sts &&
+                    ets == key_exam.ets &&
+                    courseno.equals(key_exam.courseno);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(courseno, sts, ets);
+        }
+    }
+
+
+    public static List<Map.Entry<ExamInfo,String>> Generate_ExamList(){
+
+        ExamInfoDao edao = MyApp.getCurrentAppDB().examInfoDao();
+        List<ExamInfo> exam_list = edao.selectFromToday(Clock.nowTimeStamp());
+        Map<key_exam,List<ExamInfo>> exam_map = new HashMap<>();
+
+        for(ExamInfo e : exam_list){
+            key_exam key = new key_exam(e.courseno,e.sts,e.ets);
+            if(exam_map.containsKey(key)){
+                exam_map.get(key).add(e);
+            }else {
+                exam_map.put(key, new LinkedList<ExamInfo>(){
+                    {
+                        add(e);
+                    }
+                });
+            }
+        }
+
+        Set<key_exam> ks = exam_map.keySet();
+
+        List<Map.Entry<ExamInfo,String>> res = new LinkedList<>();
+
+        for(key_exam k : ks){
+            List<ExamInfo> elist = exam_map.get(k);
+            String str = MyApp.gson.toJson(elist);
+
+            StringBuilder sb = new StringBuilder(elist.get(0).croomno);
+            for(int i=1; i<elist.size(); i++){
+                sb.append(",").append(elist.get(i).croomno);
+            }
+            ExamInfo examInfo = elist.get(0);
+            examInfo.croomno = sb.toString();
+
+            res.add(Map.entry(examInfo,str));
+
+        }
+
+        return res;
+    }
+
+
+}