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use yaml::*;
#[derive(Clone, Debug)]
pub struct Link {
pub text: String,
pub url: String
}
impl Link {
pub fn from_yaml(yaml: Yaml) -> Result<Self, &'static str> {
match yaml {
Yaml::Hash(link) => {
if link.len() != 1 {
Err("links must have exactly one entry".into())
} else {
match link.into_iter().next().unwrap() {
(Yaml::String(k), Yaml::String(v)) => Ok(Link {
text: k,
url: v,
}),
_ => Err("links must be in the form `name: url`"),
}
}
},
_ => Err("links must be in the form `name: url`")
}
}
pub fn many_from_yaml(links: Yaml) -> Result<Vec<Self>, &'static str> {
Ok(match links {
Yaml::Array(links) => try!(links.into_iter().map(Link::from_yaml).collect()),
_ => return Err("lists of links need to be arrays"),
})
}
}