wthrr 0.3.0

Weather companion for the terminal
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

use anyhow::Result;
use std::str::FromStr;
use strum::VariantNames;
use strum_macros::{AsRefStr, EnumString, EnumVariantNames};

use crate::args::ArgUnits;

#[derive(Debug, PartialEq)]
pub struct Units {
	pub temperature: TempUnit,
	pub speed: SpeedUnit,
}

#[derive(Default, Debug, PartialEq, AsRefStr, EnumString, EnumVariantNames)]
#[strum(serialize_all = "snake_case")]
pub enum TempUnit {
	None,
	#[default]
	Celsius,
	Fahrenheit,
}

#[derive(Default, Debug, PartialEq, AsRefStr, EnumString, EnumVariantNames)]
#[strum(serialize_all = "snake_case")]
pub enum SpeedUnit {
	None,
	#[default]
	Kmh,
	Mph,
	Kn,
	Ms,
}

pub fn get(arg_units: &[ArgUnits], config_units: &str) -> Result<Units> {
	let arg_units = assign_arg_units(arg_units)?;
	let temperature = arg_units.temperature.get(config_units)?;
	let speed = arg_units.speed.get(config_units)?;

	Ok(Units { temperature, speed })
}

pub fn assign_arg_units(arg_units: &[ArgUnits]) -> Result<Units> {
	let (mut temperature, mut speed) = (TempUnit::None, SpeedUnit::None);

	for val in arg_units {
		if TempUnit::VARIANTS.contains(&val.as_ref()) {
			temperature = TempUnit::from_str(val.as_ref()).unwrap()
		};
		if SpeedUnit::VARIANTS.contains(&val.as_ref()) {
			speed = SpeedUnit::from_str(val.as_ref()).unwrap()
		}
	}

	Ok(Units { temperature, speed })
}

impl TempUnit {
	fn get(self, config_units: &str) -> Result<Self> {
		let res = if self == Self::None && !config_units.is_empty() {
			match config_units {
				unit if unit.contains(Self::Fahrenheit.as_ref()) => Self::Fahrenheit,
				unit if unit.contains(Self::Celsius.as_ref()) => Self::Celsius,
				_ => Self::default(),
			}
		} else {
			match self {
				Self::None => Self::default(),
				_ => self,
			}
		};

		Ok(res)
	}
}

impl SpeedUnit {
	fn get(self, config_units: &str) -> Result<Self> {
		let res = if self == Self::None && !config_units.is_empty() {
			match config_units {
				unit if unit.contains(Self::Kmh.as_ref()) => Self::Kmh,
				unit if unit.contains(Self::Mph.as_ref()) => Self::Mph,
				unit if unit.contains(Self::Kn.as_ref()) => Self::Kn,
				unit if unit.contains(Self::Ms.as_ref()) => Self::Ms,
				_ => Self::default(),
			}
		} else {
			match self {
				Self::None => Self::default(),
				_ => self,
			}
		};

		Ok(res)
	}
}

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

	#[test]
	fn units_from_args() -> Result<()> {
		let arg_units = [ArgUnits::fahrenheit, ArgUnits::mph].to_vec();
		let cfg_units = "celsius,knots";

		assert_eq!(
			get(&arg_units, cfg_units)?,
			Units {
				temperature: TempUnit::Fahrenheit,
				speed: SpeedUnit::Mph,
			}
		);

		Ok(())
	}

	#[test]
	fn units_from_cfg() -> Result<()> {
		let arg_units: Vec<ArgUnits> = [].to_vec();
		let cfg_units = "fahrenheit,knots";

		assert_eq!(
			get(&arg_units, cfg_units)?,
			Units {
				temperature: TempUnit::Fahrenheit,
				speed: SpeedUnit::Kn,
			}
		);

		Ok(())
	}

	#[test]
	fn units_split_from_args_cfg() -> Result<()> {
		let arg_units = [ArgUnits::fahrenheit].to_vec();
		let cfg_units = "celsius,ms";

		assert_eq!(
			get(&arg_units, cfg_units)?,
			Units {
				temperature: TempUnit::Fahrenheit,
				speed: SpeedUnit::Ms,
			}
		);

		Ok(())
	}

	#[test]
	fn units_fallback() -> Result<()> {
		let arg_units = [].to_vec();
		let cfg_units = "non_variant";

		assert_eq!(
			get(&arg_units, cfg_units)?,
			Units {
				temperature: TempUnit::default(),
				speed: SpeedUnit::default(),
			}
		);

		Ok(())
	}
}