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
169
170
171
172
173
174
175
176
177
178
179
180
181

//! Defines the origin of the model in the file.
use crate::errors::error::{SurrealError, SurrealErrorStatus};

use super::string_value::StringValue;


const LOCAL: &str = "local";
const SURREAL_DB: &str = "surreal_db";
const NONE: &str = "";


/// Defines the types of origin that are supported.
/// 
/// # Fields
/// * `Local` - The model was created locally.
/// * `SurrealDb` - The model was created in the surreal database.
/// * `None` - The model has no origin
#[derive(Debug, PartialEq)]
pub enum OriginValue {
    Local(StringValue),
    SurrealDb(StringValue),
    None(StringValue),
}

impl OriginValue {

    /// Creates a new `OriginValue` with no value.
    /// 
    /// # Returns
    /// A new `OriginValue` with no value.
    pub fn fresh() -> Self {
        OriginValue::None(StringValue::fresh())
    }

    /// Create a `OriginValue` from a string.
    /// 
    /// # Arguments
    /// * `origin` - The origin as a string.
    /// 
    /// # Returns
    /// A new `OriginValue`.
    pub fn from_string(origin: String) -> Result<Self, SurrealError> {
        match origin.to_lowercase().as_str() {
            LOCAL => Ok(OriginValue::Local(StringValue::from_string(origin))),
            SURREAL_DB => Ok(OriginValue::SurrealDb(StringValue::from_string(origin))),
            NONE => Ok(OriginValue::None(StringValue::from_string(origin))),
            _ => Err(SurrealError::new(format!("invalid origin: {}", origin), SurrealErrorStatus::BadRequest))
        }
    }

    /// Converts the `OriginValue` to a string.
    /// 
    /// # Returns
    /// The `OriginValue` as a string.
    pub fn to_string(&self) -> String {
        match self {
            OriginValue::Local(string_value) => string_value.to_string(),
            OriginValue::SurrealDb(string_value) => string_value.to_string(),
            OriginValue::None(string_value) => string_value.to_string(),
        }
    }

}


/// Defines the origin of the model in the file header.
/// 
/// # Fields
/// * `origin` - The origin of the model.
/// * `author` - The author of the model.
#[derive(Debug, PartialEq)]
pub struct Origin {
    pub origin: OriginValue,
    pub author: StringValue,
}


impl Origin {

    /// Creates a new origin with no values.
    /// 
    /// # Returns
    /// A new origin with no values.
    pub fn fresh() -> Self {
        Origin {
            origin: OriginValue::fresh(),
            author: StringValue::fresh(),
        }
    }

    /// Adds an author to the origin struct.
    /// 
    /// # Arguments
    /// * `origin` - The origin to be added.
    pub fn add_author(&mut self, author: String) {
        self.author = StringValue::from_string(author);
    }

    /// Adds an origin to the origin struct.
    /// 
    /// # Arguments
    pub fn add_origin(&mut self, origin: String) -> Result<(), SurrealError> {
        self.origin = OriginValue::from_string(origin)?;
        Ok(())
    }

    /// Converts an origin to a string.
    /// 
    /// # Returns
    /// The origin as a string.
    pub fn to_string(&self) -> String {
        if self.author.value.is_none() && self.origin == OriginValue::None(StringValue::fresh()) {
            return String::from("")
        }
        format!("{}=>{}", self.author.to_string(), self.origin.to_string())
    }

    /// Creates a new origin from a string.
    /// 
    /// # Arguments
    /// * `origin` - The origin as a string.
    /// 
    /// # Returns
    /// A new origin.
    pub fn from_string(origin: String) -> Result<Self, SurrealError> {
        if origin == "".to_string() {
            return Ok(Origin::fresh());
        }
        let mut split = origin.split("=>");
        let author = split.next().unwrap().to_string();
        let origin = split.next().unwrap().to_string();
        Ok(Origin {
            origin: OriginValue::from_string(origin)?,
            author: StringValue::from_string(author),
        })
    }

}


#[cfg(test)]
mod tests {

    use super::*;

    #[test]
    fn test_fresh() {
        let origin = Origin::fresh();
        assert_eq!(origin, Origin {
            origin: OriginValue::fresh(),
            author: StringValue::fresh(),
        });
    }

    #[test]
    fn test_to_string() {
        let origin = Origin {
            origin: OriginValue::from_string("local".to_string()).unwrap(),
            author: StringValue::from_string("author".to_string()),
        };
        assert_eq!(origin.to_string(), "author=>local".to_string());

        let origin = Origin::fresh();
        assert_eq!(origin.to_string(), "".to_string());
    }

    #[test]
    fn test_from_string() {
        let origin = Origin::from_string("author=>local".to_string()).unwrap();
        assert_eq!(origin, Origin {
            origin: OriginValue::from_string("local".to_string()).unwrap(),
            author: StringValue::from_string("author".to_string()),
        });

        let origin = Origin::from_string("=>local".to_string()).unwrap();

        assert_eq!(None, origin.author.value);
        assert_eq!("local".to_string(), origin.origin.to_string());
    }

}