Extract Count

State will be read using the data from the keys page however state returns an optional vector of words.
This is because state can return any size of data including empty.

Create a function to extract the count from the state.

Add this match expression that maps:

• empty to 0.
• a single word to the count.
• anything else to an error.

Then return the count.

#![allow(unused)]
fn main() {
/// Given a query of the current count, extract the count.
pub fn extract_count(count: Option<Value>) -> anyhow::Result<Word> {
    match count {
        Some(count) => match &count[..] {
            [] => Ok(0),
            [count] => Ok(*count),
            _ => bail!("Expected single word, got: {:?}", count),
        },
        None => Ok(0),
    }
}
}