switchbot_cli/
cli.rs

1use std::{future::Future, io::stdout, iter::zip};
2
3use itertools::Itertools;
4use switchbot_api::{CommandRequest, Device, DeviceList, Help, SwitchBot};
5
6use crate::{Args, UserInput};
7
8#[derive(Debug, Default)]
9pub struct Cli {
10    args: Args,
11    switch_bot: SwitchBot,
12    current_device_indexes: Vec<usize>,
13    help: Option<Help>,
14}
15
16impl Cli {
17    pub fn new_from_args() -> Self {
18        Self {
19            args: Args::new_from_args(),
20            ..Default::default()
21        }
22    }
23
24    #[cfg(test)]
25    fn new_for_test(n_devices: usize) -> Self {
26        Self {
27            switch_bot: SwitchBot::new_for_test(n_devices),
28            ..Default::default()
29        }
30    }
31
32    fn devices(&self) -> &DeviceList {
33        self.switch_bot.devices()
34    }
35
36    fn has_current_device(&self) -> bool {
37        !self.current_device_indexes.is_empty()
38    }
39
40    fn num_current_devices(&self) -> usize {
41        self.current_device_indexes.len()
42    }
43
44    fn current_devices_as<'a, T, F>(&'a self, f: F) -> impl Iterator<Item = T> + 'a
45    where
46        F: Fn(usize) -> T + 'a,
47    {
48        self.current_device_indexes
49            .iter()
50            .map(move |&index| f(index))
51    }
52
53    fn current_devices(&self) -> impl Iterator<Item = &Device> {
54        self.current_devices_as(|index| &self.devices()[index])
55    }
56
57    fn current_devices_with_index(&self) -> impl Iterator<Item = (usize, &Device)> {
58        self.current_devices_as(|index| (index, &self.devices()[index]))
59    }
60
61    fn first_current_device(&self) -> &Device {
62        &self.devices()[self.current_device_indexes[0]]
63    }
64
65    async fn ensure_devices(&mut self) -> anyhow::Result<()> {
66        if self.devices().is_empty() {
67            self.switch_bot = self.args.create_switch_bot()?;
68            self.switch_bot.load_devices().await?;
69            log::debug!("ensure_devices: {} devices", self.devices().len());
70        }
71        Ok(())
72    }
73
74    pub async fn run(&mut self) -> anyhow::Result<()> {
75        self.args.process()?;
76        self.run_core().await?;
77        self.args.save()?;
78        Ok(())
79    }
80
81    async fn run_core(&mut self) -> anyhow::Result<()> {
82        let mut is_interactive = true;
83        if !self.args.alias_updates.is_empty() {
84            self.args.print_aliases();
85            is_interactive = false;
86        }
87
88        if !self.args.commands.is_empty() {
89            self.ensure_devices().await?;
90            self.execute_args(&self.args.commands.clone()).await?;
91        } else if is_interactive {
92            self.ensure_devices().await?;
93            self.run_interactive().await?;
94        }
95        Ok(())
96    }
97
98    async fn run_interactive(&mut self) -> anyhow::Result<()> {
99        let mut input = UserInput::new();
100        self.print_devices();
101        loop {
102            input.set_prompt(if self.has_current_device() {
103                "Command> "
104            } else {
105                "Device> "
106            });
107
108            let input_text = input.read_line()?;
109            match input_text {
110                "q" => break,
111                "" => {
112                    if self.has_current_device() {
113                        self.current_device_indexes.clear();
114                        self.print_devices();
115                        continue;
116                    }
117                    break;
118                }
119                _ => match self.execute(input_text).await {
120                    Ok(true) => self.print_devices(),
121                    Ok(false) => {}
122                    Err(error) => log::error!("{error}"),
123                },
124            }
125        }
126        Ok(())
127    }
128
129    fn print_devices(&self) {
130        if !self.has_current_device() {
131            self.print_all_devices();
132            return;
133        }
134
135        if self.current_device_indexes.len() >= 2 {
136            for (i, device) in self.current_devices_with_index() {
137                println!("{}: {device}", i + 1);
138            }
139            return;
140        }
141
142        let device = self.first_current_device();
143        print!("{device:#}");
144    }
145
146    fn print_all_devices(&self) {
147        for (i, device) in self.devices().iter().enumerate() {
148            println!("{}: {device}", i + 1);
149        }
150    }
151
152    const COMMAND_URL: &str =
153        "https://github.com/OpenWonderLabs/SwitchBotAPI#send-device-control-commands";
154    const COMMAND_IR_URL: &str = "https://github.com/OpenWonderLabs/SwitchBotAPI#command-set-for-virtual-infrared-remote-devices";
155
156    async fn print_help(&mut self) -> anyhow::Result<()> {
157        if self.help.is_none() {
158            self.help = Some(Help::load().await?);
159        }
160        let device = self.first_current_device();
161        let command_helps = self.help.as_ref().unwrap().command_helps(device);
162        let help_url = if device.is_remote() {
163            Self::COMMAND_IR_URL
164        } else {
165            Self::COMMAND_URL
166        };
167        if command_helps.is_empty() {
168            anyhow::bail!(
169                r#"No help for "{}". Please see {} for more information"#,
170                device.device_type_or_remote_type(),
171                help_url
172            )
173        }
174        for command_help in command_helps {
175            println!("{command_help}");
176        }
177        println!("Please see {help_url} for more information");
178        Ok(())
179    }
180
181    async fn execute_args(&mut self, list: &[String]) -> anyhow::Result<()> {
182        for command in list {
183            self.execute(command).await?;
184        }
185        Ok(())
186    }
187
188    async fn execute(&mut self, text: &str) -> anyhow::Result<bool> {
189        if let Some(alias) = self.args.aliases.get(text) {
190            log::debug!(r#"alias: "{text}" -> "{alias}""#);
191            return self.execute_no_alias(&alias.clone()).await;
192        }
193        self.execute_no_alias(text).await
194    }
195
196    /// Returns `true` if the current devices are changed.
197    async fn execute_no_alias(&mut self, text: &str) -> anyhow::Result<bool> {
198        let set_device_result = self.set_current_devices(text);
199        if set_device_result.is_ok() {
200            return Ok(true);
201        }
202        if self.execute_global_builtin_command(text)? {
203            return Ok(false);
204        }
205        if self.has_current_device() {
206            if self.execute_if_expr(text).await? {
207                return Ok(false);
208            }
209            if text == "help" {
210                self.print_help().await?;
211                return Ok(false);
212            }
213            self.execute_command(text).await?;
214            return Ok(false);
215        }
216        Err(set_device_result.unwrap_err())
217    }
218
219    fn set_current_devices(&mut self, text: &str) -> anyhow::Result<()> {
220        self.current_device_indexes = self.parse_device_indexes(text)?;
221        log::debug!("current_device_indexes={:?}", self.current_device_indexes);
222        Ok(())
223    }
224
225    fn parse_device_indexes(&self, value: &str) -> anyhow::Result<Vec<usize>> {
226        let values = value.split(',');
227        let mut indexes: Vec<usize> = Vec::new();
228        for s in values {
229            if let Some(alias) = self.args.aliases.get(s) {
230                indexes.extend(self.parse_device_indexes(alias)?);
231                continue;
232            }
233            indexes.push(self.parse_device_index(s)?);
234        }
235        indexes = indexes.into_iter().unique().collect::<Vec<_>>();
236        Ok(indexes)
237    }
238
239    fn parse_device_index(&self, value: &str) -> anyhow::Result<usize> {
240        if let Ok(number) = value.parse::<usize>()
241            && number > 0
242            && number <= self.devices().len()
243        {
244            return Ok(number - 1);
245        }
246        self.devices()
247            .index_by_device_id(value)
248            .ok_or_else(|| anyhow::anyhow!("Not a valid device: \"{value}\""))
249    }
250
251    async fn execute_if_expr(&mut self, expr: &str) -> anyhow::Result<bool> {
252        assert!(self.has_current_device());
253        if let Some((condition, then_command, else_command)) = Self::parse_if_expr(expr) {
254            let (device, expr) = self.device_expr(condition);
255            device.update_status().await?;
256            let eval_result = device.eval_condition(expr)?;
257            let command = if eval_result {
258                then_command
259            } else {
260                else_command
261            };
262            log::debug!("if: {condition} is {eval_result}, execute {command}");
263            Box::pin(self.execute(command)).await?;
264            return Ok(true);
265        }
266        Ok(false)
267    }
268
269    fn parse_if_expr(text: &str) -> Option<(&str, &str, &str)> {
270        if let Some(text) = text.strip_prefix("if")
271            && let Some(sep) = text.chars().nth(0)
272        {
273            if sep.is_alphanumeric() {
274                return None;
275            }
276            let fields: Vec<&str> = text[1..].split_terminator(sep).collect();
277            match fields.len() {
278                2 => return Some((fields[0], fields[1], "")),
279                3 => return Some((fields[0], fields[1], fields[2])),
280                _ => {}
281            }
282        }
283        None
284    }
285
286    fn device_expr<'a>(&'a self, expr: &'a str) -> (&'a Device, &'a str) {
287        if let Some((device, expr)) = expr.split_once('.')
288            && let Ok(device_indexes) = self.parse_device_indexes(device)
289        {
290            return (&self.devices()[device_indexes[0]], expr);
291        }
292        (self.first_current_device(), expr)
293    }
294
295    fn execute_global_builtin_command(&self, text: &str) -> anyhow::Result<bool> {
296        if text == "devices" {
297            self.print_all_devices();
298            return Ok(true);
299        }
300        Ok(false)
301    }
302
303    async fn execute_device_builtin_command(&self, text: &str) -> anyhow::Result<bool> {
304        assert!(self.has_current_device());
305        if text == "status" {
306            self.update_status("").await?;
307            return Ok(true);
308        }
309        if let Some(key) = text.strip_prefix("status.") {
310            self.update_status(key).await?;
311            return Ok(true);
312        }
313        Ok(false)
314    }
315
316    async fn execute_command(&self, text: &str) -> anyhow::Result<()> {
317        assert!(self.has_current_device());
318        if text.is_empty() {
319            return Ok(());
320        }
321        if self.execute_device_builtin_command(text).await? {
322            return Ok(());
323        }
324        let command = CommandRequest::from(text);
325        self.for_each_selected_device(|device| device.command(&command), |_| Ok(()))
326            .await?;
327        Ok(())
328    }
329
330    async fn update_status(&self, key: &str) -> anyhow::Result<()> {
331        self.for_each_selected_device(
332            |device: &Device| device.update_status(),
333            |device| {
334                if key.is_empty() {
335                    device.write_status_to(stdout())?;
336                } else if let Some(value) = device.status_by_key(key) {
337                    println!("{value}");
338                } else {
339                    log::error!(r#"No status key "{key}" for {device}"#);
340                }
341                Ok(())
342            },
343        )
344        .await?;
345        Ok(())
346    }
347
348    async fn for_each_selected_device<'a, 'b, FnAsync, Fut>(
349        &'a self,
350        fn_async: FnAsync,
351        fn_post: impl Fn(&Device) -> anyhow::Result<()>,
352    ) -> anyhow::Result<()>
353    where
354        FnAsync: Fn(&'a Device) -> Fut + Send + Sync,
355        Fut: Future<Output = anyhow::Result<()>> + Send + 'b,
356    {
357        assert!(self.has_current_device());
358
359        let results = if self.num_current_devices() < self.args.parallel_threshold {
360            log::debug!("for_each: sequential ({})", self.num_current_devices());
361            let mut results = Vec::with_capacity(self.num_current_devices());
362            for device in self.current_devices() {
363                results.push(fn_async(device).await);
364            }
365            results
366        } else {
367            log::debug!("for_each: parallel ({})", self.num_current_devices());
368            let (_, join_results) = async_scoped::TokioScope::scope_and_block(|s| {
369                for device in self.current_devices() {
370                    s.spawn(fn_async(device));
371                }
372            });
373            join_results
374                .into_iter()
375                .map(|result| result.unwrap_or_else(|error| Err(error.into())))
376                .collect()
377        };
378
379        let last_error_index = results.iter().rposition(|result| result.is_err());
380        for (i, (device, result)) in zip(self.current_devices(), results).enumerate() {
381            match result {
382                Ok(_) => fn_post(device)?,
383                Err(error) => {
384                    if i == last_error_index.unwrap() {
385                        return Err(error);
386                    }
387                    log::error!("{error}");
388                }
389            }
390        }
391        Ok(())
392    }
393}
394
395#[cfg(test)]
396mod tests {
397    use super::*;
398
399    #[test]
400    fn parse_device_indexes() {
401        let cli = Cli::new_for_test(10);
402        assert!(cli.parse_device_indexes("").is_err());
403        assert_eq!(cli.parse_device_indexes("4").unwrap(), vec![3]);
404        assert_eq!(cli.parse_device_indexes("device4").unwrap(), vec![3]);
405        assert_eq!(cli.parse_device_indexes("2,4").unwrap(), vec![1, 3]);
406        assert_eq!(cli.parse_device_indexes("2,device4").unwrap(), vec![1, 3]);
407        // The result should not be sorted.
408        assert_eq!(cli.parse_device_indexes("4,2").unwrap(), vec![3, 1]);
409        assert_eq!(cli.parse_device_indexes("device4,2").unwrap(), vec![3, 1]);
410        // The result should be unique.
411        assert_eq!(cli.parse_device_indexes("2,4,2").unwrap(), vec![1, 3]);
412        assert_eq!(cli.parse_device_indexes("4,2,4").unwrap(), vec![3, 1]);
413    }
414
415    #[test]
416    fn parse_device_indexes_alias() {
417        let mut cli = Cli::new_for_test(10);
418        cli.args.aliases.insert("k".into(), "3,5".into());
419        assert_eq!(cli.parse_device_indexes("k").unwrap(), vec![2, 4]);
420        assert_eq!(cli.parse_device_indexes("1,k,4").unwrap(), vec![0, 2, 4, 3]);
421        cli.args.aliases.insert("j".into(), "2,k".into());
422        assert_eq!(
423            cli.parse_device_indexes("1,j,4").unwrap(),
424            vec![0, 1, 2, 4, 3]
425        );
426        assert_eq!(cli.parse_device_indexes("1,j,5").unwrap(), vec![0, 1, 2, 4]);
427    }
428
429    #[test]
430    fn parse_if_expr() {
431        assert_eq!(Cli::parse_if_expr(""), None);
432        assert_eq!(Cli::parse_if_expr("a"), None);
433        assert_eq!(Cli::parse_if_expr("if"), None);
434        assert_eq!(Cli::parse_if_expr("if/a"), None);
435        assert_eq!(Cli::parse_if_expr("if/a/b"), Some(("a", "b", "")));
436        assert_eq!(Cli::parse_if_expr("if/a/b/c"), Some(("a", "b", "c")));
437        assert_eq!(Cli::parse_if_expr("if/a//c"), Some(("a", "", "c")));
438        // The separator can be any characters as long as they're consistent.
439        assert_eq!(Cli::parse_if_expr("if;a;b;c"), Some(("a", "b", "c")));
440        assert_eq!(Cli::parse_if_expr("if.a.b.c"), Some(("a", "b", "c")));
441        // But non-alphanumeric.
442        assert_eq!(Cli::parse_if_expr("ifXaXbXc"), None);
443    }
444}
switchbot_cli/cli.rs

switchbot_cli/
cli.rs
