changen 0.1.10

Helper program to manage a changelog
Documentation 
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use anyhow::bail;

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Repo {
    pub owner: String,
    pub name: String,
}

impl TryFrom<&str> for Repo {
    type Error = anyhow::Error;

    fn try_from(value: &str) -> Result<Self, Self::Error> {
        let slip = value.split('/').collect::<Vec<_>>();

        if slip.len() != 2 {
            bail!("wrong repo format");
        }

        Ok(Repo {
            owner: slip[0].to_owned(),
            name: slip[1].to_owned(),
        })
    }
}

pub fn try_get_repo(repo: Option<String>) -> Option<String> {
    let repo = match repo {
        Some(repo) => Some(repo),
        None => std::env::var("GITHUB_REPOSITORY").ok(),
    };

    if repo.is_none() {
        eprintln!("couldn't get the repo name. Example: \"wiiznokes/changen\".");
    }

    repo
}

pub struct TextInterpolate {
    buffer: String,
    start_pattern: String,
    end_pattern: String,
}

impl TextInterpolate {
    pub fn new(buffer: String, start_pattern: &str, end_pattern: &str) -> Self {
        TextInterpolate {
            buffer,
            start_pattern: start_pattern.to_string(),
            end_pattern: end_pattern.to_string(),
        }
    }

    pub fn interpolate(&mut self, name: &str, content: &str) {
        let replaced = self.buffer.replace(
            &format!("{}{}{}", self.start_pattern, name, self.end_pattern),
            content,
        );
        self.buffer = replaced;
    }

    pub fn text(self) -> String {
        self.buffer
    }
}

#[cfg(test)]
mod test {
    use super::Repo;

    #[test]
    fn test() {
        let repo = Repo::try_from("wiiznokes/fan-control").unwrap();

        assert_eq!(
            repo,
            Repo {
                owner: "wiiznokes".into(),
                name: "fan-control".into()
            }
        );
    }
}