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Elphi Calendar

CI

This simple Go server generates an ICS version of your favorites for the Elbphilharmonie.

Quick Start

The quickest way to run the calendar API is to use the docker container:

docker run -p 8080:8080 ghcr.io/codello/elphi-calendar

This will run the app on port 8080. You can now access your calendar at

http://localhost:8080/merkliste/<user-id>

See the next paragraph on how to find your user ID.

The User ID

The Elbphilharmonie favorite lists of every user is accessible without authentication. All you need is the user’s ID. To find your ID, you can do the following:

  1. Open your web browser, go to Your Account.

  2. Open the JavaScript Console and enter elbphilharmonie.ActivityId || sessionStorage.getItem("Elbphilharmonie.Webshop.ActivityId"). This will display an activity id in your console. Copy the value (whithout quotes).

  3. Run the following command that will print your account ID:

    ACTIVITY_ID=<your activity ID>
curl -sS "https://shop-services.elbphilharmonie.de/Activities/validateactivityid.json?ActivityId=$ACTIVITY_ID" | jq -r .User.UserId

    If you don’t have jq installed or don’t feed comfortable running commands in a shell, you can also open https://shop-services.elbphilharmonie.de/Activities/validateactivityid.json?ActivityId=<ActivityId> (substitute your activitiy ID from step 2 for <ActivityId>) in your browser and look for "UserId":"...".

Caching

The elphi-calendar will cache event details (but not your favorites list) for one day. This dramatically reduces the number of API calls and increases update speed. The disadvantage is that changes to events will only become visible after up to a day.

Building the Project

This project is written in Go. To compile it run

# Install Dependencies
go mod download
# Compile the package
go build ./cmd/elphi-calendar