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use regex::Regex;
lazy_static! {
pub static ref COW_TYPE: Regex = Regex::new(r"Cow<'[a-z]+,str>").unwrap();
}
pub static NUMBER_TYPES: [&'static str; 36] = [
"usize", "u8", "u16", "u32", "u64",
"isize", "i8", "i16", "i32", "i64",
"f32", "f64",
"Option<usize>", "Option<u8>", "Option<u16>", "Option<u32>", "Option<u64>",
"Option<isize>", "Option<i8>", "Option<i16>", "Option<i32>", "Option<i64>",
"Option<f32>", "Option<f64>",
"Option<Option<usize>>", "Option<Option<u8>>", "Option<Option<u16>>", "Option<Option<u32>>", "Option<Option<u64>>",
"Option<Option<isize>>", "Option<Option<i8>>", "Option<Option<i16>>", "Option<Option<i32>>", "Option<Option<i64>>",
"Option<Option<f32>>", "Option<Option<f64>>",
];
pub fn assert_string_type(name: &str, field_type: &String) {
if field_type != "String"
&& field_type != "&str"
&& !COW_TYPE.is_match(field_type)
&& field_type != "Option<String>"
&& field_type != "Option<Option<String>>"
&& !(field_type.starts_with("Option<") && field_type.ends_with("str>"))
&& !(field_type.starts_with("Option<Option<") && field_type.ends_with("str>>")) {
panic!("`{}` validator can only be used on String, &str, Cow<'_,str> or an Option of those", name);
}
}
pub fn assert_type_matches(field_name: String, field_type: &String, field_type2: Option<&String>) {
if let Some(t2) = field_type2 {
if field_type != t2 {
panic!("Invalid argument for `must_match` validator of field `{}`: types of field can't match", field_name);
}
} else {
panic!("Invalid argument for `must_match` validator of field `{}`: the other field doesn't exist in struct", field_name);
}
}
pub fn assert_has_len(field_name: String, field_type: &String) {
if field_type != "String"
&& !field_type.starts_with("Vec<")
&& !field_type.starts_with("Option<Vec<")
&& !field_type.starts_with("Option<Option<Vec<")
&& field_type != "Option<String>"
&& field_type != "Option<Option<String>>"
// a bit ugly
&& !(field_type.starts_with("Option<") && field_type.ends_with("str>"))
&& !(field_type.starts_with("Option<Option<") && field_type.ends_with("str>>"))
&& !COW_TYPE.is_match(field_type)
&& field_type != "&str" {
panic!(
"Validator `length` can only be used on types `String`, `&str`, Cow<'_,str> or `Vec` but found `{}` for field `{}`",
field_type, field_name
);
}
}
pub fn assert_has_range(field_name: String, field_type: &String) {
if !NUMBER_TYPES.contains(&field_type.as_ref()) {
panic!(
"Validator `range` can only be used on number types but found `{}` for field `{}`",
field_type, field_name
);
}
}
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