Wrote the Lambdas API for getting and deleting list sharees -- testing still needed

Lambdas/Lists/List/src/List.java

@@ -19,10 +19,6 @@ public class List {
         this.shared = shared;
     }
 
-    public void addItemEntry(ItemEntry entry) {
-        entries.add(entry);
-    }
-
     @Override
     public String toString() {
         return "List{" +
@@ -34,10 +30,6 @@ public class List {
                 '}';
     }
 
-    public ItemEntry[] getEntries() {
-        return entries.toArray(new ItemEntry[entries.size()]);
-    }
-
     public Integer getItemID() {
         return itemID;
     }
@@ -77,4 +69,12 @@ public class List {
     public void setShared(boolean shared) {
         this.shared = shared;
     }
+
+    public ItemEntry[] getEntries() {
+        return entries.toArray(new ItemEntry[entries.size()]);
+    }
+
+    public void addItemEntry(ItemEntry entry) {
+        entries.add(entry);
+    }
 }

Lambdas/Lists/ListShare/src/ListShare.java

@@ -0,0 +1,37 @@
+package com.example.listify.data;
+
+public class ListShare {
+    Integer listID;
+    String shareWithEmail;
+    ArrayList<ListShare> other;
+
+    public ListShare(ResultSet listRow) throws SQLException {
+        this.listID = listRow.getInt("listID");
+        this.shareWithEmail = listRow.getString("userID");
+        other = new ArrayList<>();
+    }
+
+    public Integer getListID() {
+        return listID;
+    }
+
+    public void setListID(Integer listID) {
+        this.listID = listID;
+    }
+
+    public String getShareWithEmail() {
+        return shareWithEmail;
+    }
+
+    public void setShareWithEmail(String shareWithEmail) {
+        this.shareWithEmail = shareWithEmail;
+    }
+
+    public ListShare[] getEntries() {
+        return other.toArray(new ListShare[other.size()]);
+    }
+
+    public void addtoList(ListShare entry) {
+        other.add(entry);
+    }
+}

Lambdas/Lists/ListShare/src/ListShareDELETE.java

@@ -0,0 +1,12 @@
+import com.amazonaws.services.lambda.runtime.Context;
+import com.amazonaws.services.lambda.runtime.RequestHandler;
+
+import java.util.Map;
+
+public class ListShareDELETE implements RequestHandler<Map<String,Object>, Object> {
+
+    public Object handleRequest(Map<String, Object> inputMap, Context unfilled) {
+        return BasicHandler.handleRequest(inputMap, unfilled, ListShareDeleter.class);
+    }
+
+}

Lambdas/Lists/ListShare/src/ListShareDeleter.java

@@ -0,0 +1,65 @@
+import java.security.AccessControlException;
+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 ListShareDeleter implements CallHandler {
+    private final Connection connection;
+    private final String cognitoID;
+
+    private final String GET_LIST_ACCESS = "SELECT * FROM List WHERE (owner = ? AND listID = ?);";
+    private final String REMOVE_SHAREE = "DELETE FROM ListSharee WHERE listID = ? AND user = ?;";
+
+    public ListShareDeleter(Connection connection, String cognitoID) {
+        this.connection = connection;
+        this.cognitoID = cognitoID;
+    }
+
+    @Override
+    public Object conductAction(Map<String, Object> bodyMap, HashMap<String, String> queryMap, String cognitoID) throws SQLException {
+        Integer listID = Integer.parseInt(queryMap.get("id"));
+
+        InvokeRequest invokeRequest = new InvokeRequest();
+        invokeRequest.setFunctionName("UserGET");
+        invokeRequest.setPayload("{" +
+                "  \"body\": {" +
+                "      \"emailToCheck\": \"" + bodyMap.get("shareWithEmail").toString() + "\"" +
+                "  }," +
+                "  \"params\": {" +
+                "      \"querystring\": {" +
+                "      }" +
+                "  }," +
+                "  \"context\": {" +
+                "    \"sub\": \"not used\"" +
+                "  }" +
+                "}");
+        InvokeResult invokeResult = AWSLambdaClientBuilder.defaultClient().invoke(invokeRequest);
+        
+        String shareeID = new String(invokeResult.getPayload().array()).replace("\"", "");
+        
+        //Ensure that the user who is unsharing a list is the owner of that list
+        PreparedStatement accessCheck = connection.prepareStatement(GET_LIST_ACCESS);
+        accessCheck.setString(1, cognitoID);
+        accessCheck.setInt(2, listID);
+
+        ResultSet userLists = accessCheck.executeQuery();
+
+        //User does not own the list; unshare attempt fails
+        if (!userLists.next()) {
+            throw new AccessControlException("User does not have access to list");
+        }
+
+        //Unshare the list with the specified sharee
+        PreparedStatement unshareList = connection.prepareStatement(REMOVE_SHAREE);
+        unshareList.setInt(1, listID);
+        unshareList.setInt(2, shareeID);
+
+        cleanAccess.executeUpdate();
+        connection.commit();
+
+        return null;
+    }
+}

Lambdas/Lists/ListShare/src/ListShareGET.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 ListShareGET implements RequestHandler<Map<String,Object>, Object> {
+
+    public Object handleRequest(Map<String, Object> inputMap, Context unfilled) {
+        return BasicHandler.handleRequest(inputMap, unfilled, ListShareGetter.class);
+    }
+}

Lambdas/Lists/ListShare/src/ListShareGetter.java

@@ -0,0 +1,40 @@
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ListShareGetter implements CallHandler{
+    private final Connection connection;
+    private final String cognitoID;
+
+    private final String GET_LISTS = "SELECT * FROM ListSharee WHERE listID = ?;";
+
+    public ListShareGetter(Connection connection, String cognitoID) {
+        this.connection = connection;
+        this.cognitoID = cognitoID;
+    }
+
+    @Override
+    public Object conductAction(Map<String, Object> bodyMap, HashMap<String, String> queryMap, String cognitoID) throws SQLException {
+        Integer listID = Integer.parseInt(queryMap.get("id"));
+
+        PreparedStatement getList = connection.prepareStatement(GET_LIST);
+        getList.setInt(1, listID);
+
+        ResultSet getListResults = getList.executeQuery();
+        getListResults.first();
+
+        //ListShare object to hold the data values of the first row retrived
+        ListShare first = new ListShare(getListResults); 
+
+        //Insert the ListShare objects to hold the data of the remaining rows into first's ListShare list
+        while (getListResults.next()) {
+            first.addtoList(new ListShare(getListResults));
+        }
+
+        return first;
+    }
+}

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

@@ -67,10 +67,6 @@ public class List {
         this.lastUpdated = lastUpdated;
     }
 
-    public ListEntry[] getEntries() {
-        return entries;
-    }
-
     public boolean isShared() {
         return shared;
     }
@@ -78,4 +74,8 @@ public class List {
     public void setShared(boolean shared) {
         this.shared = shared;
     }
+
+    public ListEntry[] getEntries() {
+        return entries;
+    }
 }

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

@@ -3,10 +3,18 @@ package com.example.listify.data;
 public class ListShare {
     Integer listID;
     String shareWithEmail;
+    final ListShare[] other;
+
+    public ListShare(Integer listID, String shareWithEmail, ListShare[] other) {
+        this.listID = listID;
+        this.shareWithEmail = shareWithEmail;
+        this.other = other;
+    }
 
     public ListShare(Integer listID, String shareWithEmail) {
         this.listID = listID;
         this.shareWithEmail = shareWithEmail;
+        this.other = null;
     }
 
     public Integer getListID() {
@@ -24,4 +32,8 @@ public class ListShare {
     public void setShareWithEmail(String shareWithEmail) {
         this.shareWithEmail = shareWithEmail;
     }
+
+    public ListShare[] getEntries() {
+        return other;
+    }
 }