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annotate rust/src/sensor.rs @ 639:89818a14648b rust tip

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- switch to using anyhow for errors, surf for http runs but surf has problems
author Matt Johnston <matt@ucc.asn.au>
date Thu, 28 Nov 2019 23:57:00 +0800
parents a9f353f488d0
children
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rev   line source
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1 use riker::actors::*;
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2
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3 use std::time::Duration;
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4 use std::io;
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5 use std::fs::File;
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6 use std::io::{Read,BufReader,BufRead};
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7 use std::path::PathBuf;
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8
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9 use std::str::FromStr;
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10
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11 use super::types::*;
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12 use super::config::Config;
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13
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14 pub struct OneWireSensor {
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15 config: Config,
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16 notify: ChannelRef<Readings>,
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17 }
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18
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19 // #[derive(Clone)]
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20 pub struct TestSensor {
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21 config: Config,
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22 notify: ChannelRef<Readings>,
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23 }
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24
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25 #[derive(Debug,Clone)]
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26 pub struct SendReading;
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27
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28 impl Actor for OneWireSensor {
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29 type Msg = SendReading;
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30
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31 fn recv(&mut self,
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32 _ctx: &Context<Self::Msg>,
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33 _msg: Self::Msg,
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34 _sender: Sender) {
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35 self.notify.tell(Publish{msg: self.get_readings(), topic: "readings".into()}, None);
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36 }
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37
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38 fn pre_start(&mut self, ctx: &Context<Self::Msg>) {
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39 let dur = Duration::new(self.config.sensor_sleep,0);
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40 ctx.schedule(Duration::from_millis(0), dur, ctx.myself(), None, SendReading);
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41 }
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42 }
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43
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44 impl OneWireSensor {
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45 pub fn new_actor((config, notify): (Config, ChannelRef<Readings>)) -> Self {
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46 Self::new(config, notify)
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47 }
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48
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49 pub fn new(config: Config, notify: ChannelRef<Readings>) -> Self {
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50 OneWireSensor {
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51 config: config.clone(),
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52 notify: notify,
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53 }
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54 }
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55
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56 fn get_readings(&self) -> Readings {
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57 let mut r = Readings::new();
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58
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59 if let Ok(names) = self.sensor_names() {
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60 for n in &names {
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61 match self.read_sensor(n) {
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62 Ok(s) => r.add(n, s),
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63 Err(e) => debug!("Error reading sensors {}: {}", n, e)
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64 }
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65 }
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66 }
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67
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68 debug!("sensor step {:?}", r);
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69 r
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70 }
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71
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72 fn read_sensor(&self, n: &str) -> Result<f32, TemplogError> {
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73 lazy_static! {
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74 // multiline
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75 static ref THERM_RE: regex::Regex = regex::Regex::new("(?m).* YES\n.*t=(.*)\n").unwrap();
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76 }
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77 let mut path = PathBuf::from(&self.config.sensor_base_dir);
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78 path.push(n);
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79 path.push("w1_slave");
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80 let mut s = String::new();
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81 File::open(path)?.read_to_string(&mut s)?;
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82 let caps = THERM_RE.captures(&s).ok_or_else(|| {
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83 TemplogError::new("Bad sensor contents match")
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84 })?;
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85 let v = caps.get(1).ok_or_else(|| {
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86 TemplogError::new("Bad field contents match")
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87 })?.as_str();
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88
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89 Ok(f32::from_str(v)?)
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90 }
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91
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92 fn sensor_names(&self) -> Result<Vec<String>, TemplogError> {
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93 // TODO: needs to handle multiple busses.
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94 let mut path = PathBuf::from(&self.config.sensor_base_dir);
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95 path.push("w1_master_slaves");
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96
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97 let f = BufReader::new(File::open(path)?);
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98 let s = f.lines().collect::<Result<Vec<String>, io::Error>>()?;
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99 Ok(s)
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100 }
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101 }
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102
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103 impl Actor for TestSensor {
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104 type Msg = SendReading;
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105
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106 fn recv(&mut self,
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107 _ctx: &Context<Self::Msg>,
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108 _msg: Self::Msg,
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109 _sender: Sender) {
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110 self.notify.tell(Publish{msg: self.get_readings(), topic: "readings".into()}, None);
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111 }
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112
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113 fn pre_start(&mut self, ctx: &Context<Self::Msg>) {
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114 info!("pre_start testsensor readings");
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115 let dur = Duration::new(self.config.sensor_sleep,0);
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116 ctx.schedule(Duration::from_millis(0), dur, ctx.myself(), None, SendReading);
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117 }
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118 }
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119
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120 impl TestSensor {
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121 pub fn new_actor((config, notify): (Config, ChannelRef<Readings>)) -> Self {
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122 Self::new(config, notify)
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123 }
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124
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125 pub fn new(config: Config, notify: ChannelRef<Readings>) -> Self {
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126 TestSensor {
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127 config: config.clone(),
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128 notify: notify,
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129 }
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130 }
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131
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132 fn get_readings(&self) -> Readings {
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133 let mut r = Readings::new();
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134 r.add("ambient", 31.2);
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135 r.add("wort", Self::try_read("test_wort.txt").unwrap_or_else(|_| 18.0));
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136 r.add("fridge", Self::try_read("test_fridge.txt").unwrap_or_else(|_| 20.0));
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137 r
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138 }
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139
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140 fn try_read(filename: &str) -> Result<f32, TemplogError> {
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141 let mut s = String::new();
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142 File::open(filename)?.read_to_string(&mut s)?;
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143 Ok(s.trim().parse::<f32>()?)
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144 }
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145 }