#[derive(Debug)]
pub struct ContentList<T> {
    pub list: Vec<T>,
    pub index: usize,
}

impl<T> ContentList<T> {
    pub fn new() -> Self {
        ContentList {
            list: Vec::new(),
            index: 0,
        }
    }

    // Go to next item in list
    pub fn next(&mut self) {
        // if self.index < self.list.len() - 1 {
        //     self.index += 1;
        // }

        let len = self.list.len();
        if len != 0 {
            if self.index == self.list.len() - 1 {
                self.index = 0;
            } else {
                self.index += 1;
            }
        }
    }

    /// Go to previous item in list
    pub fn prev(&mut self) {
        if self.index == 0 {
            let len = self.list.len();
            if len != 0 {
                self.index = len - 1;
            }
        } else {
            self.index -= 1;
        }
    }
}