cloudformation.yaml

Parameters:
    S3Bucket:
        Type: String
        Default: cupidsarrow
        Description: The s3 bucket where the lamda function exists.
    S3Key:
        Type: String
        Default: deployment.zip
        Description: The name of the uploaded lambda function (must be go).
    SlackChannelID:
        Type: String
        Description: The Slack channel ID, https://app.slack.com/client/<workspace_id>/<channel_id>
    SlackOauthToken:
        Type: String
        Description: The Slack Oauth token to allow posting to slack, from https://api.slack.com/apps/<some identifier>/oauth?
    Frequency:
        Type: String
        Default: rate(1 hour)
        Description: How frequently to check for updates. Please be kind and do not use small values.
Resources:
    InvokeCupidsArrowPermission:
        Type: AWS::Lambda::Permission
        Properties:
            Action: lambda:InvokeFunction
            FunctionName:
                Fn::GetAtt:
                - CupidsArrow
                - Arn
            Principal: events.amazonaws.com
            SourceArn:
                Fn::GetAtt:
                - CupidsArrowRule
                - Arn
    CupidsArrowRule:
        Type: AWS::Events::Rule
        Properties:
            Description: Hourly trigger.
            ScheduleExpression: !Ref Frequency
            State: ENABLED
            Targets:
            - Arn:
                Fn::GetAtt:
                - CupidsArrow
                - Arn
              Id: CupidsArrow
    CupidsArrowRole:
        Type: AWS::IAM::Role
        Properties:
            Description: Role for CupidsArrow lambda function.
            AssumeRolePolicyDocument:
                Version: '2012-10-17'
                Statement:
                - Effect: Allow
                  Principal:
                      Service:
                      - lambda.amazonaws.com
                  Action:
                  - sts:AssumeRole
            ManagedPolicyArns:
            - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
    CupidsArrow:
        Type: AWS::Lambda::Function
        Properties:
            Environment:
                Variables:
                    SLACK_CHANNEL_ID: !Ref SlackChannelID
                    SLACK_OAUTH_TOKEN: !Ref SlackOauthToken
            Code:
                S3Bucket: !Ref S3Bucket
                S3Key: !Ref S3Key
            Handler: main
            Role:
                Fn::GetAtt:
                - CupidsArrowRole
                - Arn
            Runtime: go1.x
            Timeout: 30