Add list position changing Lambdas

Initial shot at repositioning Lambdas.

Lambdas/Lists/ListReposition/src/ListRepositionActor.java

@@ -0,0 +1,60 @@
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ListRepositionActor implements CallHandler {
+
+    private Connection connection;
+    private String cognitoID;
+
+    public ListRepositionActor(Connection connection, String cognitoID) {
+        this.connection = connection;
+        this.cognitoID = cognitoID;
+    }
+
+    final private String GET_PRIOR_POSITON = "SELECT uiPosition FROM ListSharee WHERE userID = ? AND listID = ?;";
+    final private String SET_NEW_POSITON = "UPDATE ListSharee SET uiPosition = ? WHERE userID = ? AND listID = ?;";
+    final private String DECREMENT_HIGHER_POSITIONS = "UPDATE ListSharee SET uiPosition = uiPosition - 1 WHERE uiPosition > ? AND userID = ?;";
+    final private String INCREMENT_GEQ_POSITIONS = "UPDATE ListSharee SET uiPosition = uiPosition + 1 WHERE uiPosition >= ? AND userID = ?;";
+
+
+    public Object conductAction(Map<String, Object> bodyMap, HashMap<String, String> queryString, String cognitoID) throws SQLException {
+        Integer listID = (Integer) bodyMap.get("listID");
+        Integer newPosition = (Integer) bodyMap.get("newPosition");
+
+        PreparedStatement getPriorPosition = connection.prepareStatement(GET_PRIOR_POSITON);
+        getPriorPosition.setString(1, cognitoID);
+        getPriorPosition.setInt(2, listID);
+        ResultSet priorPositionRS = getPriorPosition.executeQuery();
+        if (!priorPositionRS.next()) {
+            throw new IllegalArgumentException("Bad listID for user");
+        }
+        Integer priorPosition = priorPositionRS.getInt("uiPosition");
+
+        PreparedStatement fillPriorPosition = connection.prepareStatement(DECREMENT_HIGHER_POSITIONS);
+        fillPriorPosition.setInt(1, priorPosition);
+        fillPriorPosition.setString(2, cognitoID);
+        System.out.println(fillPriorPosition);
+        fillPriorPosition.executeUpdate();
+
+        PreparedStatement openNewPosition = connection.prepareStatement(INCREMENT_GEQ_POSITIONS);
+        openNewPosition.setInt(1, priorPosition);
+        openNewPosition.setString(2, cognitoID);
+        System.out.println(openNewPosition);
+        openNewPosition.executeUpdate();
+
+        PreparedStatement setNewPosition = connection.prepareStatement(SET_NEW_POSITON);
+        setNewPosition.setInt(1, newPosition);
+        setNewPosition.setString(2, cognitoID);
+        setNewPosition.setInt(3, listID);
+        System.out.println(setNewPosition);
+        setNewPosition.executeUpdate();
+
+        connection.commit();
+        return null;
+    }
+
+}

Lambdas/Lists/ListReposition/src/ListRepositionPUT.java

@@ -0,0 +1,11 @@
+import com.amazonaws.services.lambda.runtime.Context;
+import com.amazonaws.services.lambda.runtime.RequestHandler;
+
+import java.util.Map;
+
+public class ListRepositionPUT  implements RequestHandler<Map<String,Object>, Object> {
+
+    public Object handleRequest(Map<String, Object> inputMap, Context unfilled) {
+        return BasicHandler.handleRequest(inputMap, unfilled, ListRepositionActor.class);
+    }
+}

Lambdas/Lists/ListShare/src/ListSharer.java

@@ -22,7 +22,8 @@ public class ListSharer implements CallHandler {
     }
 
     final private String CHECK_ACCESS = "SELECT * from ListSharee WHERE listID = ? AND userID = ?;";
-    final private String SHARE_LIST = "INSERT INTO ListSharee(listID, userID, permissionLevel) VALUES(?, ?, ?) ON DUPLICATE KEY UPDATE permissionLevel = ?;";
+    final private String SHARE_LIST = "INSERT INTO ListSharee(listID, userID, permissionLevel, ) VALUES(?, ?, ?, ?) ON DUPLICATE KEY UPDATE permissionLevel = ?;";
+    private final String UI_POSITION_CHECK = "SELECT Max(uiPosition) as maxUIPosition FROM ListSharee WHERE userID = ?;";
 
     public Object conductAction(Map<String, Object> bodyMap, HashMap<String, String> queryString, String cognitoID) throws SQLException {
         PreparedStatement checkAccess = connection.prepareStatement(CHECK_ACCESS);
@@ -62,12 +63,21 @@ public class ListSharer implements CallHandler {
 //            throw new InputMismatchException("The specified user already has access");
 //        }
 
+        PreparedStatement uiPositionCheck = connection.prepareStatement(UI_POSITION_CHECK);
+        uiPositionCheck.setString(1, shareWithSub);
+        ResultSet uiPositionCheckRS = uiPositionCheck.executeQuery();
+        int nextPosition = 1;
+        if (uiPositionCheckRS.next()) {
+            nextPosition = uiPositionCheckRS.getInt("maxUIPosition") + 1;
+        }
+
         PreparedStatement shareList = connection.prepareStatement(SHARE_LIST);
         shareList.setInt(1, listID);
         shareList.setString(2, shareWithSub);
         Integer permissionLevel = Integer.parseInt(bodyMap.get("permissionLevel").toString());
         shareList.setInt(3, permissionLevel);
-        shareList.setInt(4, permissionLevel);
+        shareList.setInt(4, nextPosition);
+        shareList.setInt(5, permissionLevel);
         shareList.executeUpdate();
         connection.commit();
         return null;

Listify/app/src/main/java/com/example/listify/data/ListReposition.java

@@ -0,0 +1,35 @@
+package com.example.listify.data;
+
+public class ListReposition {
+    Integer listID;
+    Integer newPosition;
+
+    public ListReposition(Integer listID, Integer newPosition) {
+        this.listID = listID;
+        this.newPosition = newPosition;
+    }
+
+    @Override
+    public String toString() {
+        return "ListReposition{" +
+                "listID=" + listID +
+                ", newPosition=" + newPosition +
+                '}';
+    }
+
+    public Integer getListID() {
+        return listID;
+    }
+
+    public void setListID(Integer listID) {
+        this.listID = listID;
+    }
+
+    public Integer getNewPosition() {
+        return newPosition;
+    }
+
+    public void setNewPosition(Integer newPosition) {
+        this.newPosition = newPosition;
+    }
+}