Request Entries from Rest API

Required for Request: SessionID (Login),
tag in der woche (montag: 0)
kalenderwoche
semesterid (evtl.später semestername)

backend/database.trace.db

@@ -247,3 +247,43 @@ Wrong user name or password [28000-214]
 	at org.h2.message.DbException.getJdbcSQLException(DbException.java:510)
 	at org.h2.message.DbException.getJdbcSQLException(DbException.java:477)
 	... 16 more
+2023-05-08 14:01:35 database: wrong user or password; user: "ADM"
+org.h2.message.DbException: Falscher Benutzername oder Passwort
+Wrong user name or password [28000-214]
+	at org.h2.message.DbException.get(DbException.java:223)
+	at org.h2.message.DbException.get(DbException.java:199)
+	at org.h2.message.DbException.get(DbException.java:188)
+	at org.h2.engine.Engine.openSession(Engine.java:154)
+	at org.h2.engine.Engine.openSession(Engine.java:222)
+	at org.h2.engine.Engine.createSession(Engine.java:201)
+	at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:338)
+	at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:122)
+	at org.h2.util.JdbcUtils.getConnection(JdbcUtils.java:288)
+	at org.h2.server.web.WebServer.getConnection(WebServer.java:808)
+	at org.h2.server.web.WebApp.login(WebApp.java:1033)
+	at org.h2.server.web.WebApp.process(WebApp.java:226)
+	at org.h2.server.web.WebApp.processRequest(WebApp.java:176)
+	at org.h2.server.web.WebThread.process(WebThread.java:152)
+	at org.h2.server.web.WebThread.run(WebThread.java:101)
+	at java.base/java.lang.Thread.run(Thread.java:1623)
+Caused by: org.h2.jdbc.JdbcSQLInvalidAuthorizationSpecException: Falscher Benutzername oder Passwort
+Wrong user name or password [28000-214]
+	at org.h2.message.DbException.getJdbcSQLException(DbException.java:510)
+	at org.h2.message.DbException.getJdbcSQLException(DbException.java:477)
+	... 16 more
+2023-05-08 23:46:11 jdbc[3]: exception
+org.h2.jdbc.JdbcSQLSyntaxErrorException: Tabelle "WEEK" nicht gefunden
+Table "WEEK" not found; SQL statement:
+select * from week [42102-214]
+2023-05-08 23:46:25 jdbc[3]: exception
+org.h2.jdbc.JdbcSQLSyntaxErrorException: Tabelle "SEMESTR" nicht gefunden
+Table "SEMESTR" not found; SQL statement:
+select * from semestr [42102-214]
+2023-05-08 23:46:46 jdbc[3]: exception
+org.h2.jdbc.JdbcSQLSyntaxErrorException: Tabelle "WEEK" nicht gefunden
+Table "WEEK" not found; SQL statement:
+select * from week [42102-214]
+2023-05-08 23:54:05 jdbc[3]: exception
+org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax Fehler in SQL Befehl "select * [*]froms days"
+Syntax error in SQL statement "select * [*]froms days"; SQL statement:
+select * froms days [42000-214]

backend/src/main/java/com/example/backend/anwprj/DataBaseHandler.java

@@ -1,9 +1,14 @@
 package com.example.backend.anwprj;
 
+import com.example.backend.anwprj.Entries.Entry;
 import com.example.backend.anwprj.Semesters.Semester;
 import com.example.backend.anwprj.Users.User;
+import com.example.backend.anwprj.Users.UserSessionIDHandler;
 
 import java.sql.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 
 public class DataBaseHandler
 {
@@ -34,6 +39,52 @@ public class DataBaseHandler
         }
     }
 
+    public Entry[] getEntries(int dayinweek, int weeknumber, int semesterid, User user)
+    {
+        try
+        {
+            ResultSet rs = st.executeQuery("select distinct e.id, e.dayid, e.usercreatedbyid, e.timestart, e.timeend, e.info " +
+                    "from entries e, days d, weeks w, semester s " +
+                    "where e.dayid = d.id and " +
+                    "d.weekid = w.id and " +
+                    "w.semesterid = s.id and " +
+                    "d.dayinweek = " + dayinweek + " and " +
+                    "w.weeknumber = " + weeknumber + " and " +
+                    "s.id = " + semesterid);
+
+
+            boolean editable = false;
+
+            List<Entry> temp = new ArrayList<>();
+            while(rs.next())
+            {
+                editable = false;
+                if(rs.getInt("usercreatedbyid") == user.getId())
+                {
+                    editable = true;
+                }
+
+                temp.add(
+                        new Entry(
+                                rs.getInt("id"),
+                                rs.getInt("dayid"),
+                                rs.getInt("usercreatedbyid"),
+                                rs.getInt("timestart"),
+                                rs.getInt("timeend"),
+                                rs.getString("info"),
+                                editable
+                        )
+                );
+            }
+
+            return temp.toArray(new Entry[0]);
+
+        } catch (SQLException e)
+        {
+            throw new RuntimeException(e);
+        }
+    }
+
     public Semester findSemester(String name)
     {
         try

backend/src/main/java/com/example/backend/anwprj/Entries/Entry.java

@@ -0,0 +1,73 @@
+package com.example.backend.anwprj.Entries;
+
+public class Entry
+{
+    private int id;
+    private int dayid;
+    private int usercreatedbyid;
+    private int timestart;
+    private int timeend;
+    private String info;
+    private boolean editable;
+
+    public Entry(int id, int dayid, int usercreatedbyid, int timestart, int timeend, String info, boolean editable)
+    {
+        this.id = id;
+        this.dayid = dayid;
+        this.usercreatedbyid = usercreatedbyid;
+        this.timestart = timestart;
+        this.timeend = timeend;
+        this.info = info;
+        this.editable = editable;
+    }
+
+    public int getId()
+    {
+        return id;
+    }
+
+    public int getDayid()
+    {
+        return dayid;
+    }
+
+    public int getUsercreatedbyid()
+    {
+        return usercreatedbyid;
+    }
+
+    public int getTimestart()
+    {
+        return timestart;
+    }
+
+    public int getTimeend()
+    {
+        return timeend;
+    }
+
+    public String getInfo()
+    {
+        return info;
+    }
+
+    public void setDayid(int dayid)
+    {
+        this.dayid = dayid;
+    }
+
+    public void setTimestart(int timestart)
+    {
+        this.timestart = timestart;
+    }
+
+    public void setTimeend(int timeend)
+    {
+        this.timeend = timeend;
+    }
+
+    public void setInfo(String info)
+    {
+        this.info = info;
+    }
+}

backend/src/main/java/com/example/backend/anwprj/Users/UserSessionIDHandler.java

@@ -10,28 +10,37 @@ public class UserSessionIDHandler
 {
     public static HashMap<String, User> mapping = new HashMap<>();
 
+    public static User getUserBySessionID(String sessionID)
+    {
+        return mapping.get(sessionID);
+    }
+
     public static String addUser(String mail, String password)
     {
         User user = DataBaseHandler.getInstance().findUser(mail, password);
 
         if(user != null)
         {
-            byte[] array = new byte[30]; // length is bounded by 7
+            byte[] id = new byte[100];
-            new Random().nextBytes(array);
-            String generatedString = new String(array, StandardCharsets.UTF_8);
-            mapping.put(generatedString, user);
 
+            for(int i = 0; i < id.length; i++)
+            {
+                id[i] = (byte) (Math.random() * 26 + 64);
+            }
+
+            String generatedString = new String(id, StandardCharsets.US_ASCII);
+
+            mapping.put(generatedString, user);
             new java.util.Timer().schedule(new java.util.TimerTask(){
 
                 @Override
                 public void run()
                 {
                     mapping.remove(generatedString);
-                    System.out.println("test");
                     return;
                 }
                 //value to be higher
-            }, 5000);
+            }, 5000000);
 
             return generatedString;
         }

backend/src/main/java/com/example/backend/anwprj/controller/EntriesController.java

@@ -0,0 +1,38 @@
+package com.example.backend.anwprj.controller;
+
+import com.example.backend.anwprj.DataBaseHandler;
+import com.example.backend.anwprj.Entries.Entry;
+import com.example.backend.anwprj.Users.User;
+import com.example.backend.anwprj.Users.UserSessionIDHandler;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+public class EntriesController
+{
+    private DataBaseHandler db;
+
+    {
+        db = DataBaseHandler.getInstance();
+    }
+
+    @CrossOrigin
+    @GetMapping("/entries")
+    public ResponseEntity<Entry[]> getEntries(
+            @RequestParam(name = "sessionid") String sessionID,
+            @RequestParam(name = "dayinweek") int dayinweek,
+            @RequestParam(name = "weeknumber") int weeknumber,
+            @RequestParam(name = "semesterid") int semesterid)
+    {
+        User user = UserSessionIDHandler.getUserBySessionID(sessionID);
+
+        if(user == null)
+        {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        Entry[] entries = db.getEntries(dayinweek, weeknumber, semesterid, user);
+        return new ResponseEntity<>(entries, HttpStatus.OK);
+    }
+}