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use remote_control_rs::tasks::{IntoTaskErr, Task};

pub struct Executor<'a, 't> {
    task: &'t Task,
    args: Box<[&'a str]>,
    output: Option<Result<String, String>>,
}

impl<'a, 't> Executor<'a, 't> {
    pub fn new(task: &'t Task, args: impl IntoIterator<Item = &'a str>) -> Result<Self, IntoTaskErr> {
        Ok(
            Self {
                task: task,
                args: args
                    .into_iter()
                    .collect(),
                output: None,
            },
        )
    }

    pub fn run(&mut self) -> Option<&Result<String, String>> {
        self.output = Some(
            (self
                .task
                .exec)(&self.args),
        );
        self.output
            .as_ref()
    }
}