Gather and Present Health-data

Data about a person’s health and fitness comes from different sources:

• Wearables like watches
• Clinical / lab reports
• Imaging

They have different formats:

• Streaming data
• Charts / statistics
• ECG
• Pictures
• Videos
• Text / prescriptions

Users like to consume this data using different media:

• PDF reports (sent over e-mail)
• HTML reports (accessed via web)
• Mobile apps
• Voice assistants
• Reminder systems

The product

We need a software solution to get the data in the required format on the desired media.

One way is to code it all in the main function.

void main() {
    //read the inputs
    switch(type_of_input) {
        case STREAM:
            switch(format) {
                ...
                switch(media_desired) {
                    case PDF:
                        ...
                }
            }
    }
}

This has obvious drawbacks of complexity and inflexibility. A developer would need to copy the entire code, when a new customer has a new data-source.

The task

Cut the implementation into parts. State the responsibility of each part.