|
| 1 | +use saphyr::{Scalar, Yaml}; |
| 2 | +use serde_json::Value; |
| 3 | + |
| 4 | +/// Converts a [saphyr::Yaml][Yaml] value to a [serde_json::Value][Value]. |
| 5 | +/// |
| 6 | +/// This is a crude, minimal, implementation aimed only at handling `mithril-api-spec` needs of |
| 7 | +/// parsing `openapi.yaml` files. |
| 8 | +/// It should not be reused as-is for other cases. |
| 9 | +pub(crate) fn convert_yaml_to_serde_json(yaml_value: &Yaml) -> Result<Value, String> { |
| 10 | + match yaml_value { |
| 11 | + Yaml::Value(scalar) => match scalar { |
| 12 | + Scalar::String(s) => Ok(Value::String(s.to_string())), |
| 13 | + Scalar::Integer(i) => Ok(Value::from(*i)), |
| 14 | + Scalar::FloatingPoint(f) => { |
| 15 | + serde_json::Number::from_f64(**f).map(Value::Number).ok_or_else(|| { |
| 16 | + format!( |
| 17 | + "Could not convert saphyr::Yaml::FloatingPoint {} to JSON number", |
| 18 | + f |
| 19 | + ) |
| 20 | + }) |
| 21 | + } |
| 22 | + Scalar::Boolean(b) => Ok(Value::Bool(*b)), |
| 23 | + Scalar::Null => Ok(Value::Null), |
| 24 | + }, |
| 25 | + Yaml::Sequence(seq) => { |
| 26 | + let mut json_array = Vec::new(); |
| 27 | + for item in seq { |
| 28 | + json_array.push(convert_yaml_to_serde_json(item)?); |
| 29 | + } |
| 30 | + Ok(Value::Array(json_array)) |
| 31 | + } |
| 32 | + Yaml::Mapping(map) => { |
| 33 | + let mut json_obj = serde_json::Map::new(); |
| 34 | + for (key, value) in map { |
| 35 | + let key_str = match key { |
| 36 | + Yaml::Value(Scalar::String(s)) => s, |
| 37 | + _ => return Err("saphyr::Yaml::Mapping key must be a string".to_string()), |
| 38 | + }; |
| 39 | + json_obj.insert(key_str.to_string(), convert_yaml_to_serde_json(value)?); |
| 40 | + } |
| 41 | + Ok(Value::Object(json_obj)) |
| 42 | + } |
| 43 | + Yaml::Representation(_val, _scalar_style, _tag) => { |
| 44 | + Err("saphyr::Yaml::Representation variant is not supported".to_string()) |
| 45 | + } |
| 46 | + Yaml::Tagged(_, boxed) => convert_yaml_to_serde_json(boxed), |
| 47 | + Yaml::Alias(_) => Err("saphyr::Yaml::Alias are not supported".to_string()), |
| 48 | + Yaml::BadValue => Err("Bad YAML value".to_string()), |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +#[cfg(test)] |
| 53 | +mod tests { |
| 54 | + use saphyr::LoadableYamlNode; |
| 55 | + |
| 56 | + use super::*; |
| 57 | + |
| 58 | + #[test] |
| 59 | + fn test_convert_scalar_string() { |
| 60 | + let yaml = Yaml::Value(Scalar::String("test".into())); |
| 61 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 62 | + assert_eq!(json, Value::String("test".to_string())); |
| 63 | + } |
| 64 | + |
| 65 | + #[test] |
| 66 | + fn test_convert_scalar_int() { |
| 67 | + let yaml = Yaml::Value(Scalar::Integer(42)); |
| 68 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 69 | + assert_eq!(json, Value::Number(42.into())); |
| 70 | + } |
| 71 | + |
| 72 | + #[test] |
| 73 | + fn test_convert_scalar_float() { |
| 74 | + let yaml = Yaml::load_from_str("2.14").unwrap()[0].to_owned(); |
| 75 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 76 | + assert!(json.is_number()); |
| 77 | + assert_eq!(json.as_f64().unwrap(), 2.14); |
| 78 | + } |
| 79 | + |
| 80 | + #[test] |
| 81 | + fn test_convert_scalar_bool() { |
| 82 | + let yaml = Yaml::Value(Scalar::Boolean(true)); |
| 83 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 84 | + assert_eq!(json, Value::Bool(true)); |
| 85 | + } |
| 86 | + |
| 87 | + #[test] |
| 88 | + fn test_convert_scalar_null() { |
| 89 | + let yaml = Yaml::Value(Scalar::Null); |
| 90 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 91 | + assert_eq!(json, Value::Null); |
| 92 | + } |
| 93 | + |
| 94 | + #[test] |
| 95 | + fn test_convert_sequence() { |
| 96 | + let yaml = Yaml::Sequence(vec![ |
| 97 | + Yaml::Value(Scalar::Integer(1)), |
| 98 | + Yaml::Value(Scalar::Integer(2)), |
| 99 | + ]); |
| 100 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 101 | + assert_eq!( |
| 102 | + json, |
| 103 | + Value::Array(vec![Value::Number(1.into()), Value::Number(2.into())]) |
| 104 | + ); |
| 105 | + } |
| 106 | + |
| 107 | + #[test] |
| 108 | + fn test_convert_mapping() { |
| 109 | + let yaml = Yaml::load_from_str("key: value").unwrap()[0].to_owned(); |
| 110 | + let json = convert_yaml_to_serde_json(&yaml).unwrap(); |
| 111 | + let mut expected = serde_json::Map::new(); |
| 112 | + expected.insert("key".to_string(), Value::String("value".to_string())); |
| 113 | + assert_eq!(json, Value::Object(expected)); |
| 114 | + } |
| 115 | + |
| 116 | + #[test] |
| 117 | + fn test_invalid_mapping_key() { |
| 118 | + let yaml = Yaml::load_from_str("42: value").unwrap()[0].to_owned(); |
| 119 | + assert_eq!( |
| 120 | + convert_yaml_to_serde_json(&yaml).unwrap_err(), |
| 121 | + "saphyr::Yaml::Mapping key must be a string" |
| 122 | + ); |
| 123 | + } |
| 124 | + |
| 125 | + #[test] |
| 126 | + fn test_representation_is_not_supported() { |
| 127 | + let yaml = Yaml::Representation("test".into(), saphyr::ScalarStyle::SingleQuoted, None); |
| 128 | + let error = convert_yaml_to_serde_json(&yaml).unwrap_err(); |
| 129 | + assert_eq!( |
| 130 | + error, |
| 131 | + "saphyr::Yaml::Representation variant is not supported" |
| 132 | + ); |
| 133 | + } |
| 134 | + |
| 135 | + #[test] |
| 136 | + fn test_alias_is_not_supported() { |
| 137 | + let yaml = Yaml::Alias(1); |
| 138 | + let error = convert_yaml_to_serde_json(&yaml).unwrap_err(); |
| 139 | + assert_eq!(error, "saphyr::Yaml::Alias are not supported"); |
| 140 | + } |
| 141 | + |
| 142 | + #[test] |
| 143 | + fn test_bad_value_is_not_supported() { |
| 144 | + let yaml = Yaml::BadValue; |
| 145 | + let error = convert_yaml_to_serde_json(&yaml).unwrap_err(); |
| 146 | + assert_eq!(error, "Bad YAML value"); |
| 147 | + } |
| 148 | +} |
0 commit comments