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

use crate::{Error, Result, UserActionStep, UserStep};
use parking_lot::Mutex;
use serde::{Deserialize, Serialize};
use std::{collections::HashMap, fmt::Debug, sync::Arc};

#[derive(Deserialize, Serialize, Debug, Clone)]
pub struct ActionSteps {
  pub pre: Option<UserStep>,
  pub run: UserStep,
  pub post: Option<UserStep>,
}

pub trait Action
where
  Self: Send + Sync,
{
  fn normalize(&self, step: UserActionStep) -> Result<ActionSteps>;
}

#[derive(Clone)]
pub struct Actions {
  actions: Arc<Mutex<HashMap<String, Box<dyn Action>>>>,
}

impl Actions {
  pub fn new() -> Self {
    let actions: HashMap<String, Box<dyn Action>> = HashMap::new();

    Self {
      actions: Arc::new(Mutex::new(actions)),
    }
  }

  pub fn register<T>(&self, name: impl Into<String>, action: T)
  where
    T: Action + 'static,
  {
    self.actions.lock().insert(name.into(), Box::new(action));
  }

  pub fn unregister(&self, name: &str) {
    self.actions.lock().remove(name);
  }

  pub fn normalize(&self, step: UserActionStep) -> Result<ActionSteps> {
    let actions = self.actions.lock();
    let action = actions.get(&step.uses).ok_or_else(|| {
      Error::workflow_config_error(format!("Action `{}` is not found", step.uses))
    })?;

    action.normalize(step)
  }

  pub fn size(&self) -> usize {
    self.actions.lock().len()
  }
}

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

  #[test]
  fn test_normalize_step_actions() -> Result<()> {
    struct CacheAction {}

    impl Action for CacheAction {
      fn normalize(&self, _step: UserActionStep) -> Result<ActionSteps> {
        Ok(ActionSteps {
          pre: None,
          run: UserStep::Command(UserCommandStep {
            name: Some("Restore cache".to_string()),
            run: "restore cache".to_string(),
            ..Default::default()
          }),
          post: Some(UserStep::Command(UserCommandStep {
            name: Some("Save cache".to_string()),
            run: "save cache".to_string(),
            ..Default::default()
          })),
        })
      }
    }

    let actions = Actions::new();

    actions.register("caches", CacheAction {});

    let test_step = UserActionStep {
      uses: "caches".to_string(),
      ..Default::default()
    };

    let steps = actions.normalize(test_step)?;

    assert!(steps.pre.is_none());

    if let UserStep::Command(step) = steps.run {
      assert_eq!(step.name, Some("Restore cache".to_string()));
      assert_eq!(step.run, "restore cache".to_string());
    } else {
      panic!("Should be command step");
    }

    if let Some(UserStep::Command(step)) = steps.post {
      assert_eq!(step.name, Some("Save cache".to_string()));
      assert_eq!(step.run, "save cache".to_string());
    } else {
      panic!("Should be command step");
    }

    Ok(())
  }

  #[test]
  fn test_not_exists_action() -> Result<()> {
    let actions = Actions::new();

    let step = UserActionStep {
      uses: "not-exists-action".to_string(),
      ..Default::default()
    };

    let result = actions.normalize(step);

    let err = result.unwrap_err();

    assert_eq!(
      err,
      Error::workflow_config_error("Action `not-exists-action` is not found")
    );

    Ok(())
  }
}