# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0


AWSTemplateFormatVersion: 2010-09-09
Transform:
  - AWS::Serverless-2016-10-31

Description: >
  Backend AppSync API 

Parameters:
  CognitoStackName:
    Description: An environment name for Cognito stack
    Type: String
    Default: serverless-api-cognito

  UserPoolAdminGroupName:
    Description: 'User pool group name for API administrators, leave default value unless you used different one in the shared Cognito stack. NOTE: If you need to change this parameter value, update ./src/mapping_templates/delete_booking_request.vtl accordingly'
    Type: String
    Default: apiAdmins

Resources:

  GraphQLApi:
    Type: "AWS::AppSync::GraphQLApi"
    Properties:
      Name: !Sub "GraphQLBackendAPI-${AWS::StackName}"
      AuthenticationType: "AMAZON_COGNITO_USER_POOLS"
      UserPoolConfig:
        UserPoolId: 
          Fn::ImportValue: !Sub "${CognitoStackName}-UserPool"
        AwsRegion: !Ref "AWS::Region"
        DefaultAction: "ALLOW"
      XrayEnabled: true
      LogConfig:
        ExcludeVerboseContent: false
        FieldLogLevel: "ALL"
        CloudWatchLogsRoleArn: !GetAtt PushToCloudWatchLogsRole.Arn
      Tags:
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  AppSyncLogsKMSKey:
    Type: AWS::KMS::Key
    Properties: 
      Description: CMK for AppSync logs
      Enabled: true
      EnableKeyRotation: True
      KeyPolicy: 
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal: 
              AWS: 
                - !Sub "arn:aws:iam::${AWS::AccountId}:root"
            Action:
              - "kms:*"
            Resource: "*"
          - Effect: Allow
            Principal:
              Service:
                - !Sub logs.${AWS::Region}.amazonaws.com
            Action:
              - "kms:Encrypt*"
              - "kms:Decrypt*"
              - "kms:ReEncrypt*"
              - "kms:GenerateDataKey*"
              - "kms:Describe*"
            Resource: "*"
            Condition:
              ArnEquals: 
                kms:EncryptionContext:aws:logs:arn: !Sub "arn:aws:logs:${AWS::Region}:${AWS::AccountId}:log-group:/aws/appsync/apis/${GraphQLApi.ApiId}"
      KeySpec: SYMMETRIC_DEFAULT
      KeyUsage: ENCRYPT_DECRYPT
      Tags:
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  GraphQLApiLogGroup:
    Type: AWS::Logs::LogGroup
    Properties:
      LogGroupName: !Sub "/aws/appsync/apis/${GraphQLApi.ApiId}"
      RetentionInDays: 7
      KmsKeyId: !GetAtt AppSyncLogsKMSKey.Arn
      Tags:
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  PushToCloudWatchLogsRole:
    Type: AWS::IAM::Role
    Properties: 
      AssumeRolePolicyDocument: 
        Version: "2012-10-17"
        Statement: 
          - 
            Effect: Allow
            Principal: 
              Service: 
                - appsync.amazonaws.com
            Action: 
              - sts:AssumeRole
      Path: "/"
      Tags:
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  PushToCloudWatchLogsRolePolicy: 
    Type: AWS::IAM::Policy
    Properties: 
      PolicyName: !Sub ${AWS::StackName}-PushToCloudWatchLogs-Policy
      PolicyDocument: 
        Version: "2012-10-17"
        Statement: 
          - Effect: Allow
            Action: 
              - logs:CreateLogGroup
              - logs:CreateLogStream
              - logs:PutLogEvents
            Resource: !GetAtt GraphQLApiLogGroup.Arn
      Roles: 
        - Ref: PushToCloudWatchLogsRole

  GrapgQLSchema:
    Type: "AWS::AppSync::GraphQLSchema"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      Definition: !Sub 
        - |
          schema {
            query: Query
            mutation: Mutation
            subscription: Subscription
          }

          type Location {
            locationid: ID!
            name: String!
            description: String
            imageUrl: String
            resources: [Resource]
            timestamp: String
          }

          type Resource {
            resourceid: ID!
            locationid: ID!
            name: String!
            description: String
            type: String
            bookings: [Booking]
            timestamp: String
          }

          type Booking {
            bookingid: ID!
            resourceid: ID!
            userid: ID!
            starttimeepochtime: Float
            timestamp: String
          }

          type Mutation {
            createLocation(locationid: ID, name: String!, description: String, imageUrl: String): Location
            @aws_auth(cognito_groups: ["${AdminGroupName}"])
            deleteLocation(locationid: ID!): ID
            @aws_auth(cognito_groups: ["${AdminGroupName}"])
            createResource(resourceid: ID, locationid: ID!, name: String!, description: String, type: String): Resource
            @aws_auth(cognito_groups: ["${AdminGroupName}"])
            deleteResource(resourceid: ID!): ID
            @aws_auth(cognito_groups: ["${AdminGroupName}"])
            createBooking(bookingid: ID, resourceid: ID!, starttimeepochtime: Float): Booking
            deleteBooking(bookingid: ID!): ID
          }

          type Query {
            getAllLocations: [Location]
            getLocation(locationid: ID!): Location
            getResource(resourceid: ID!): Resource
            getBooking(bookingid: ID!): Booking
            getMyBookings: [Booking]
          }

          type Subscription {
            locationCreated: Location
            @aws_subscribe(mutations: ["createLocation"])
            resourceCreated(resourceid: ID): Resource
            @aws_subscribe(mutations: ["createResource"])
            bookingCreated(resourceid: ID): Booking
            @aws_subscribe(mutations: ["createBooking"])
          }
        - AdminGroupName: 
            !Sub "${UserPoolAdminGroupName}" 

  CreateLocationMutationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Mutation"
      FieldName: "createLocation"
      DataSourceName: !GetAtt LocationsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/create_location_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/create_location_response.vtl

  DeleteLocationMutationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Mutation"
      FieldName: "deleteLocation"
      DataSourceName: !GetAtt LocationsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/delete_location_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/delete_location_response.vtl

  SingleLocationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Query"
      FieldName: "getLocation"
      DataSourceName: !GetAtt LocationsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_location_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_location_response.vtl

  AllLocationsResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Query"
      FieldName: "getAllLocations"
      DataSourceName: !GetAtt LocationsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_locations_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_locations_response.vtl

  CreateResourceMutationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Mutation"
      FieldName: "createResource"
      DataSourceName: !GetAtt ResourcesDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/create_resource_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/create_resource_response.vtl

  DeleteResourceMutationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Mutation"
      FieldName: "deleteResource"
      DataSourceName: !GetAtt ResourcesDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/delete_resource_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/delete_resource_response.vtl

  SingleResourceResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Query"
      FieldName: "getResource"
      DataSourceName: !GetAtt ResourcesDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_resource_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_resource_response.vtl

  ResourcesForLocationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Location"
      FieldName: "resources"
      DataSourceName: !GetAtt ResourcesDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_resources_for_location_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_resources_for_location_response.vtl

  CreateBookingMutationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Mutation"
      FieldName: "createBooking"
      DataSourceName: !GetAtt BookingsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/create_booking_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/create_booking_response.vtl

  DeleteBookingMutationResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Mutation"
      FieldName: "deleteBooking"
      DataSourceName: !GetAtt BookingsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/delete_booking_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/delete_booking_response.vtl

  SingleBookingResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Query"
      FieldName: "getBooking"
      DataSourceName: !GetAtt BookingsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_booking_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_booking_response.vtl

  BookingsForResourceResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Resource"
      FieldName: "bookings"
      DataSourceName: !GetAtt BookingsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_bookings_for_resource_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_bookings_for_resource_response.vtl

  BookingsForUserResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt GraphQLApi.ApiId
      TypeName: "Query"
      FieldName: "getMyBookings"
      DataSourceName: !GetAtt BookingsDataSource.Name
      RequestMappingTemplateS3Location: ./src/mapping_templates/get_bookings_for_user_request.vtl
      ResponseMappingTemplateS3Location: ./src/mapping_templates/get_bookings_for_user_response.vtl

  AppSyncServiceRole:
    Type: "AWS::IAM::Role"
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          -
            Effect: "Allow"
            Principal:
              Service:
                - "appsync.amazonaws.com"
            Action:
              - "sts:AssumeRole"
      Path: "/"
      Tags:
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  LocationsDataSource:
    Type: "AWS::AppSync::DataSource"
    Properties:
      Type: "AMAZON_DYNAMODB"
      ApiId: !GetAtt GraphQLApi.ApiId
      Name: "LocationsDataSource"
      ServiceRoleArn: !GetAtt AppSyncServiceRole.Arn
      DynamoDBConfig:
        TableName: !Ref LocationsTable
        AwsRegion: !Ref "AWS::Region"

  ResourcesDataSource:
    Type: "AWS::AppSync::DataSource"
    Properties:
      Type: "AMAZON_DYNAMODB"
      ApiId: !GetAtt GraphQLApi.ApiId
      Name: "ResourcesDataSource"
      ServiceRoleArn: !GetAtt AppSyncServiceRole.Arn
      DynamoDBConfig:
        TableName: !Ref ResourcesTable
        AwsRegion: !Ref "AWS::Region"

  BookingsDataSource:
    Type: "AWS::AppSync::DataSource"
    Properties:
      Type: "AMAZON_DYNAMODB"
      ApiId: !GetAtt GraphQLApi.ApiId
      Name: "BookingsDataSource"
      ServiceRoleArn: !GetAtt AppSyncServiceRole.Arn
      DynamoDBConfig:
        TableName: !Ref BookingsTable
        AwsRegion: !Ref "AWS::Region"

  DynamoDBAccessPolicy:
    Type: "AWS::IAM::Policy"
    Properties:
      PolicyName: "dynamodb-access"
      PolicyDocument:
        Version: "2012-10-17"
        Statement:
          -
            Effect: "Allow"
            Action: 
              - "dynamodb:BatchGet*"
              - "dynamodb:DescribeStream"
              - "dynamodb:DescribeTable"
              - "dynamodb:Get*"
              - "dynamodb:Query"
              - "dynamodb:Scan"
              - "dynamodb:BatchWrite*"
              - "dynamodb:CreateTable"
              - "dynamodb:Delete*"
              - "dynamodb:Update*"
              - "dynamodb:PutItem"
              - "dynamodb:ConditionCheckItem"
            Resource:
              - !GetAtt LocationsTable.Arn
              - !GetAtt ResourcesTable.Arn
              - !GetAtt BookingsTable.Arn
              - !Sub "${ResourcesTable.Arn}/index/locationidGSI"
              - !Sub "${BookingsTable.Arn}/index/useridGSI"
              - !Sub "${BookingsTable.Arn}/index/bookingsByUserByTimeGSI"
              - !Sub "${BookingsTable.Arn}/index/bookingsByResourceByTimeGSI"
      Roles:
        -
          Ref: "AppSyncServiceRole"

  LocationsTable:
    Type: AWS::Serverless::SimpleTable
    Properties:
      PrimaryKey:
        Name: locationid
        Type: String
      ProvisionedThroughput:
        ReadCapacityUnits: 2
        WriteCapacityUnits: 2
      Tags:
        Stack: !Sub "${AWS::StackName}"

  ResourcesTable:
    Type: AWS::DynamoDB::Table
    Properties:
      BillingMode: PAY_PER_REQUEST
      PointInTimeRecoverySpecification:
        PointInTimeRecoveryEnabled: True
      SSESpecification:
        KMSMasterKeyId: alias/aws/dynamodb
        SSEEnabled: True
        SSEType: KMS
      AttributeDefinitions:
        - AttributeName: resourceid
          AttributeType: S
        - AttributeName: locationid
          AttributeType: S
      KeySchema:
        - AttributeName: resourceid
          KeyType: HASH
      GlobalSecondaryIndexes:
        - IndexName: locationidGSI
          KeySchema:
            - AttributeName: locationid
              KeyType: HASH
          Projection:
            ProjectionType: ALL
      Tags:
        - Key: "Stack"
          Value: !Sub "${AWS::StackName}"

  BookingsTable:
    Type: AWS::DynamoDB::Table
    Properties:
      BillingMode: PAY_PER_REQUEST
      PointInTimeRecoverySpecification:
        PointInTimeRecoveryEnabled: True
      SSESpecification:
        KMSMasterKeyId: alias/aws/dynamodb
        SSEEnabled: True
        SSEType: KMS
      AttributeDefinitions:
        - AttributeName: bookingid
          AttributeType: S
        - AttributeName: userid
          AttributeType: S
        - AttributeName: resourceid
          AttributeType: S
        - AttributeName: starttimeepochtime
          AttributeType: N
      KeySchema:
        - AttributeName: bookingid
          KeyType: HASH
      GlobalSecondaryIndexes:
        - IndexName: useridGSI
          KeySchema:
            - AttributeName: userid
              KeyType: HASH
          Projection:
            ProjectionType: ALL
        - IndexName: bookingsByUserByTimeGSI
          KeySchema:
            - AttributeName: userid
              KeyType: HASH
            - AttributeName: starttimeepochtime
              KeyType: RANGE
          Projection:
            ProjectionType: ALL
        - IndexName: bookingsByResourceByTimeGSI
          KeySchema:
            - AttributeName: resourceid
              KeyType: HASH
            - AttributeName: starttimeepochtime
              KeyType: RANGE
          Projection:
            ProjectionType: ALL
      Tags:
        - Key: "Stack"
          Value: !Sub "${AWS::StackName}"

  AlarmsKMSKey:
    Type: AWS::KMS::Key
    Properties: 
      Description: CMK for SNS alarms topic
      Enabled: true
      EnableKeyRotation: True
      KeyPolicy: 
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal: 
              Service: 
                - "cloudwatch.amazonaws.com"
                - "sns.amazonaws.com"
            Action:
              - "kms:GenerateDataKey*"
              - "kms:Decrypt"
            Resource: "*"
          - Effect: Allow
            Principal: 
              AWS: 
                - !Sub "arn:aws:iam::${AWS::AccountId}:root"
            Action:
              - "kms:*"
            Resource: "*"
      KeySpec: SYMMETRIC_DEFAULT
      KeyUsage: ENCRYPT_DECRYPT
      PendingWindowInDays: 30
      Tags: 
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  AlarmsTopic:
    Type: AWS::SNS::Topic
    Properties:
      KmsMasterKeyId: !Ref AlarmsKMSKey
      Tags:
        - Key: "Stack" 
          Value: !Sub "${AWS::StackName}"

  ApiErrorsAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
      AlarmActions:
        - !Ref AlarmsTopic
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
        - Name: GraphQLAPIId
          Value: !GetAtt GraphQLApi.ApiId
      EvaluationPeriods: 1
      MetricName: 5XXError
      Namespace: AWS/AppSync
      Period: 60
      Statistic: Sum
      Threshold: 1.0

  LocationsDynamoDBThrottlingAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
      AlarmActions:
        - !Ref AlarmsTopic
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
        - Name: TableName
          Value: !Ref LocationsTable
      EvaluationPeriods: 1
      MetricName: ThrottledRequests
      Namespace: AWS/DynamoDB
      Period: 60
      Statistic: Sum
      Threshold: 1.0

  ResourcesDynamoDBThrottlingAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
      AlarmActions:
        - !Ref AlarmsTopic
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
        - Name: TableName
          Value: !Ref ResourcesTable
      EvaluationPeriods: 1
      MetricName: ThrottledRequests
      Namespace: AWS/DynamoDB
      Period: 60
      Statistic: Sum
      Threshold: 1.0

  BookingsDynamoDBThrottlingAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
      AlarmActions:
        - !Ref AlarmsTopic
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
        - Name: TableName
          Value: !Ref BookingsTable
      EvaluationPeriods: 1
      MetricName: ThrottledRequests
      Namespace: AWS/DynamoDB
      Period: 60
      Statistic: Sum
      Threshold: 1.0

  ApplicationDashboard:
    Type: AWS::CloudWatch::Dashboard
    Properties:
      DashboardName: !Sub "${AWS::StackName}-dashboard"
      DashboardBody: 
        Fn::Sub: >
          {
              "widgets": [
                  {
                      "height": 6,
                      "width": 18,
                      "y": 0,
                      "x": 0,
                      "type": "metric",
                      "properties": {
                          "metrics": [
                              [ "AWS/AppSync", "4xx", "GraphQLAPIId", "${GraphQLApi.ApiId}", { "yAxis": "right" } ],
                              [ ".", "5xx", ".", ".", { "yAxis": "right" } ],
                              [ ".", "Latency", ".", ".", { "stat": "Average" } ]
                          ],
                          "view": "timeSeries",
                          "stacked": false,
                          "region": "${AWS::Region}",
                          "period": 60,
                          "stat": "Sum",
                          "title": "AppSync"
                      }
                  },
                  {
                      "height": 6,
                      "width": 6,
                      "y": 6,
                      "x": 0,
                      "type": "metric",
                      "properties": {
                          "metrics": [
                              [ "AWS/DynamoDB", "ConsumedReadCapacityUnits", "TableName", "${LocationsTable}", { "stat": "Maximum" } ],
                              [ ".", "ConsumedWriteCapacityUnits", ".", ".", { "stat": "Maximum" } ],
                              [ ".", "ProvisionedReadCapacityUnits", ".", ".", { "period": 300 } ],
                              [ ".", "ProvisionedWriteCapacityUnits", ".", ".", { "period": 300 } ]
                          ],
                          "view": "timeSeries",
                          "stacked": false,
                          "region": "${AWS::Region}",
                          "title": "DynamoDB - Locations",
                          "period": 60,
                          "stat": "Average"
                      }
                  },
                  {
                      "height": 6,
                      "width": 6,
                      "y": 6,
                      "x": 6,
                      "type": "metric",
                      "properties": {
                          "metrics": [
                              [ "AWS/DynamoDB", "ConsumedReadCapacityUnits", "TableName", "${ResourcesTable}", { "stat": "Maximum" } ],
                              [ ".", "ConsumedWriteCapacityUnits", ".", ".", { "stat": "Maximum" } ],
                              [ ".", "ProvisionedReadCapacityUnits", ".", ".", { "period": 300 } ],
                              [ ".", "ProvisionedWriteCapacityUnits", ".", ".", { "period": 300 } ]
                          ],
                          "view": "timeSeries",
                          "stacked": false,
                          "region": "${AWS::Region}",
                          "title": "DynamoDB - Resources",
                          "period": 60,
                          "stat": "Average"
                      }
                  },
                  {
                      "height": 6,
                      "width": 6,
                      "y": 6,
                      "x": 12,
                      "type": "metric",
                      "properties": {
                          "metrics": [
                              [ "AWS/DynamoDB", "ConsumedReadCapacityUnits", "TableName", "${BookingsTable}", { "period": 60, "stat": "Maximum" } ],
                              [ ".", "ConsumedWriteCapacityUnits", ".", ".", { "period": 60, "stat": "Maximum" } ],
                              [ ".", "ProvisionedReadCapacityUnits", ".", "." ],
                              [ ".", "ProvisionedWriteCapacityUnits", ".", "." ]
                          ],
                          "view": "timeSeries",
                          "stacked": false,
                          "region": "${AWS::Region}",
                          "title": "DynamoDB - Bookings",
                          "period": 300,
                          "stat": "Average"
                      }
                  }
              ]
          }

Outputs:
  APIEndpoint:
    Description: "GraphQL API endpoint URL"
    Value: !GetAtt GraphQLApi.GraphQLUrl

  DashboardURL:
    Description: "Dashboard URL"
    Value: !Sub "https://console.aws.amazon.com/cloudwatch/home?region=${AWS::Region}#dashboards:name=${ApplicationDashboard}"

  AlarmsTopic:
    Description: "SNS Topic to be used for the alarms subscriptions"
    Value: !Ref AlarmsTopic

  AppSyncLogs:
    Description: "CloudWatch Logs group for AppSync logs"
    Value: !Ref GraphQLApiLogGroup

  LocationsTable:
    Description: "DynamoDB Locations table"
    Value: !Ref LocationsTable

  ResourcesTable:
    Description: "DynamoDB Resources table"
    Value: !Ref ResourcesTable

  BookingsTable:
    Description: "DynamoDB Bookings table"
    Value: !Ref BookingsTable