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
|
use std::collections::HashMap;
use rand::Rng;
use serde_json::Value;
use crate::{
parameter::{Parameter, ParameterType},
Template,
Result,
aerr,
PResult,
perr
};
const MAX_NESTING: usize = 5;
#[derive(Debug, PartialEq, Clone)]
pub enum ComponentParameter {
Constant(Parameter),
Argument(String),
Random(Vec<ComponentParameter>),
Concat(Vec<ComponentParameter>),
If(Box<ComponentParameter>, Box<ComponentParameter>, Box<ComponentParameter>),
TemplateSelf,
TemplateName
}
impl ComponentParameter {
pub fn evaluate(&self, arguments: &HashMap<&str, Parameter>, template: &Template) -> Option<Parameter> {
self.evaluate_(arguments, template, 0)
}
fn evaluate_(&self, arguments: &HashMap<&str, Parameter>, template: &Template, nesting: usize) -> Option<Parameter> {
if nesting > MAX_NESTING {
return None;
}
match self {
Self::Constant(val) => {
Some(val.clone())
}
Self::Argument(argname) => {
Some(arguments.get(argname.as_str())?.clone())
}
Self::Random(options) => {
let r = rand::thread_rng().gen_range(0, options.len());
options[r].evaluate_(arguments, template, nesting + 1)
}
Self::Concat(options) => {
let mut string = String::new();
for option in options {
if let Parameter::String(s) = option.evaluate_(arguments, template, nesting+1)? {
string.push_str(&s);
} else {
return None;
}
}
Some(Parameter::String(string))
}
Self::If(condition, thenval, elseval) => {
if let Parameter::Bool(b) = condition.evaluate_(arguments, template, nesting+1)? {
if b {
thenval.evaluate_(arguments, template, nesting+1)
} else {
elseval.evaluate_(arguments, template, nesting+1)
}
} else {
None
}
}
Self::TemplateSelf => Some(Parameter::Template(template.clone())),
Self::TemplateName => Some(Parameter::String(template.name.0.clone())),
}
}
pub fn from_json(value: &Value) -> PResult<Self> {
if !value.is_array() {
return Ok(Self::Constant(Parameter::guess_from_json(value).ok_or(perr!("invalid component parameter {:?}", value))?));
}
let paramvalue = value.get(1).ok_or(perr!("index 1 not in component parameter"))?;
let typename = value.get(0).ok_or(perr!("index 0 not in component parameter"))?.as_str().ok_or(perr!("compparam type not a string"))?;
if let Some(paramtype) = ParameterType::from_str(typename) {
Ok(Self::Constant(Parameter::from_typed_json(paramtype, paramvalue).ok_or_else(||
perr!("failed to parse parameter constant: {:?} {:?}", paramtype, paramvalue)
)?))
} else {
match typename {
"A" | "arg" => {
let argname = paramvalue.as_str().ok_or(perr!("argument parameter not a string"))?.to_string();
Ok(Self::Argument(argname))
},
"random" => {
let optionvalues = paramvalue.as_array().ok_or(perr!("random argument not an array"))?;
let mut options = Vec::new();
for option in optionvalues {
options.push(Self::from_json(option)?)
}
Ok(Self::Random(options))
},
"concat" => {
let values = paramvalue.as_array().ok_or(perr!("concat argument not an array"))?;
let mut options = Vec::new();
for option in values {
options.push(Self::from_json(option)?)
}
Ok(Self::Concat(options))
},
"if" => {
Ok(Self::If(
Box::new(Self::from_json(paramvalue.get(0).ok_or(perr!("if does not have condition"))?)?),
Box::new(Self::from_json(paramvalue.get(1).ok_or(perr!("if does not have then value"))?)?),
Box::new(Self::from_json(paramvalue.get(2).ok_or(perr!("if does not have else value"))?)?)
))
}
"self" => Ok(Self::TemplateSelf),
"name" => Ok(Self::TemplateName),
_ => Err(perr!("unknown compparam type '{}'", typename))
}
}
}
pub fn get_type(&self, arguments: &[(String, ParameterType, Option<Parameter>)]) -> Result<ParameterType>{
Ok(match self {
Self::Constant(param) => param.paramtype(),
Self::Argument(argname) => arguments.iter().find(|(n, _t, _d)| n == argname).ok_or(aerr!("unknown argument name {} in {:?}", argname, arguments))?.1,
Self::Random(options) => {
let typ: ParameterType = options.get(0).ok_or(aerr!("random has no options"))?.get_type(arguments)?;
for param in options {
if param.get_type(arguments)? != typ {
return Err(aerr!("inconsistent parameter types in random"));
}
}
typ
},
Self::If(condition, thenval, elseval) => {
if condition.get_type(arguments)? != ParameterType::Bool {
return Err(aerr!("if condition is not a bool"));
}
let typ: ParameterType = thenval.get_type(arguments)?;
if elseval.get_type(arguments)? != typ {
return Err(aerr!("inconsistent parameter types in if"));
}
typ
},
Self::Concat(_s) => ParameterType::String,
Self::TemplateSelf => ParameterType::Template,
Self::TemplateName => ParameterType::String
})
}
}
|
