staircase 0.0.7

Kubernetes Step-based Operator
Documentation 
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pub(super) fn html_body(elevator: &str) -> String {
    format!(
        r#"
        <!DOCTYPE html>
        <html lang="en">
        <head>
          <meta charset="UTF-8">
          <meta http-equiv="refresh" content="1">
          <title>ASCII Elevator Shaft</title>
          <style>
            body {{
              font-family: monospace;
              white-space: pre;
              background-color: #f4f4f4;
              padding: 20px;
            }}
          </style>
        </head>
        <body>
This is an elevator:
<pre>
{}
</pre>
        </body>
        </html>
        "#,
        elevator
    )
}

pub(super) fn elevator_ascii(min: i8, max: i8, level: i8, content: &str) -> String {
    let floor_count: usize = (max - min + 1).unsigned_abs() as usize;

    let mut result = String::with_capacity(floor_count * 40);

    let content_width = content.len() + 2;

    let single_floor = |first: char, inside: char, data: &mut String| {
        data.push(first);
        for _ in 0..content_width {
            data.push(inside);
        }
        data.push(first);
    };

    single_floor('+', '-', &mut result);
    result.push('\n');

    // Ensure top-to-bottom drawing (from max to min)
    for floor in (min..=max).rev() {
        if floor == level {
            result.push_str("|[");
            result.push_str(content);
            result.push_str("]|");
        } else {
            single_floor('|', ' ', &mut result);
        }

        // Add floor label
        result.push_str(&format!("{floor:4}"));
        result.push('\n');
    }

    single_floor('+', '-', &mut result);
    result.push('\n');

    result
}