1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168

use crate::types::*;

use serde::{Deserialize, Serialize};
use serde_json::Value;

/// Enumeration referencing the possible AMQP values depending on the types
#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
pub enum AMQPValue {
    /// A bool
    Boolean(Boolean),
    /// An i8
    ShortShortInt(ShortShortInt),
    /// A u8
    ShortShortUInt(ShortShortUInt),
    /// An i16
    ShortInt(ShortInt),
    /// A u16
    ShortUInt(ShortUInt),
    /// An i32
    LongInt(LongInt),
    /// A u32
    LongUInt(LongUInt),
    /// An i64
    LongLongInt(LongLongInt),
    /// An f32
    Float(Float),
    /// An f64
    Double(Double),
    /// A decimal value
    DecimalValue(DecimalValue),
    /// A String (deprecated)
    ShortString(ShortString),
    /// A String
    LongString(LongString),
    /// An array of AMQPValue
    FieldArray(FieldArray),
    /// A timestamp (u32)
    Timestamp(Timestamp),
    /// A Map<String, AMQPValue>
    FieldTable(FieldTable),
    /// An array of bytes (RabbitMQ speicific)
    ByteArray(ByteArray),
    /// No value
    Void,
}

impl AMQPValue {
    /// Get the AMQPType of an AMQPValue
    pub fn get_type(&self) -> AMQPType {
        match *self {
            AMQPValue::Boolean(_) => AMQPType::Boolean,
            AMQPValue::ShortShortInt(_) => AMQPType::ShortShortInt,
            AMQPValue::ShortShortUInt(_) => AMQPType::ShortShortUInt,
            AMQPValue::ShortInt(_) => AMQPType::ShortInt,
            AMQPValue::ShortUInt(_) => AMQPType::ShortUInt,
            AMQPValue::LongInt(_) => AMQPType::LongInt,
            AMQPValue::LongUInt(_) => AMQPType::LongUInt,
            AMQPValue::LongLongInt(_) => AMQPType::LongLongInt,
            AMQPValue::Float(_) => AMQPType::Float,
            AMQPValue::Double(_) => AMQPType::Double,
            AMQPValue::DecimalValue(_) => AMQPType::DecimalValue,
            AMQPValue::ShortString(_) => AMQPType::ShortString,
            AMQPValue::LongString(_) => AMQPType::LongString,
            AMQPValue::FieldArray(_) => AMQPType::FieldArray,
            AMQPValue::Timestamp(_) => AMQPType::Timestamp,
            AMQPValue::FieldTable(_) => AMQPType::FieldTable,
            AMQPValue::ByteArray(_) => AMQPType::ByteArray,
            AMQPValue::Void => AMQPType::Void,
        }
    }

    /// Convert a serde_json::Value into an AMQPValue
    pub fn try_from(value: &Value, amqp_type: AMQPType) -> Option<AMQPValue> {
        match amqp_type {
            AMQPType::Boolean => value.as_bool().map(AMQPValue::Boolean),
            AMQPType::ShortShortInt => value
                .as_i64()
                .map(|i| AMQPValue::ShortShortInt(i as ShortShortInt)),
            AMQPType::ShortShortUInt => value
                .as_u64()
                .map(|u| AMQPValue::ShortShortUInt(u as ShortShortUInt)),
            AMQPType::ShortInt => value.as_i64().map(|i| AMQPValue::ShortInt(i as ShortInt)),
            AMQPType::ShortUInt => value.as_u64().map(|u| AMQPValue::ShortUInt(u as ShortUInt)),
            AMQPType::LongInt => value.as_i64().map(|i| AMQPValue::LongInt(i as LongInt)),
            AMQPType::LongUInt => value.as_u64().map(|u| AMQPValue::LongUInt(u as LongUInt)),
            AMQPType::LongLongInt => value
                .as_i64()
                .map(|i| AMQPValue::LongLongInt(i as LongLongInt)),
            AMQPType::LongLongUInt => value
                .as_i64()
                .map(|i| AMQPValue::LongLongInt(i as LongLongInt)), /* Not a typo; AMQPValue::LongLongUInt doesn't exist */
            AMQPType::Float => value.as_f64().map(|i| AMQPValue::Float(i as Float)),
            AMQPType::Double => value.as_f64().map(|i| AMQPValue::Double(i as Double)),
            AMQPType::DecimalValue => None,
            AMQPType::ShortString => value
                .as_str()
                .map(ShortString::from)
                .map(AMQPValue::ShortString),
            AMQPType::LongString => value
                .as_str()
                .map(LongString::from)
                .map(AMQPValue::LongString),
            AMQPType::FieldArray => None,
            AMQPType::Timestamp => value.as_u64().map(|t| AMQPValue::Timestamp(t as Timestamp)),
            AMQPType::FieldTable => None,
            AMQPType::ByteArray => None,
            AMQPType::Void => value.as_null().map(|_| AMQPValue::Void),
        }
    }
}

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

    use serde_json::Number;

    #[test]
    fn test_from_bool_value() {
        assert_eq!(
            AMQPValue::try_from(&Value::Bool(false), AMQPType::Boolean),
            Some(AMQPValue::Boolean(false))
        );
        assert_eq!(
            AMQPValue::try_from(&Value::Bool(true), AMQPType::Boolean),
            Some(AMQPValue::Boolean(true))
        );
    }

    #[test]
    fn test_from_number_value() {
        assert_eq!(
            AMQPValue::try_from(&Value::Number(Number::from(42)), AMQPType::LongLongUInt),
            Some(AMQPValue::LongLongInt(42))
        );
        assert_eq!(
            AMQPValue::try_from(&Value::Number(Number::from(-42)), AMQPType::LongLongInt),
            Some(AMQPValue::LongLongInt(-42))
        );
        assert_eq!(
            AMQPValue::try_from(
                &Value::Number(Number::from_f64(42.42).unwrap()),
                AMQPType::Double
            ),
            Some(AMQPValue::Double(42.42))
        );
    }

    #[test]
    fn test_from_string_value() {
        assert_eq!(
            AMQPValue::try_from(&Value::String(String::new()), AMQPType::LongString),
            Some(AMQPValue::LongString(LongString::default()))
        );
        assert_eq!(
            AMQPValue::try_from(&Value::String("test".to_string()), AMQPType::LongString),
            Some(AMQPValue::LongString("test".into()))
        );
    }

    #[test]
    fn test_from_null_value() {
        assert_eq!(
            AMQPValue::try_from(&Value::Null, AMQPType::Void),
            Some(AMQPValue::Void)
        );
    }
}