objtalk 0.3.0

a lightweight realtime database for IoT projects
Documentation 
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 chrono::Local;
use colored::*;
use serde::Serialize;
use serde_json::Value;
use std::cell::RefCell;
use std::collections::HashMap;
use uuid::Uuid;

#[derive(Serialize)]
#[serde(tag = "type")]
#[serde(rename_all = "camelCase")]
pub enum LogMessage {
	ClientConnect { client: Uuid },
	ClientDisconnect { client: Uuid },
	Set { object: String, value: Value, client: Uuid },
	Patch { object: String, value: Value, client: Uuid },
	Get { pattern: String, client: Uuid },
	#[serde(rename_all = "camelCase")]
	Query { pattern: String, provide_rpc: bool, query: Uuid, client: Uuid },
	Unsubscribe { query: Uuid, client: Uuid },
	Remove { object: String, client: Uuid },
	Emit { object: String, event: String, data: Value, client: Uuid },
	#[serde(rename_all = "camelCase")]
	Invoke { object: String, method: String, args: Value, invocation_id: Uuid, client: Uuid },
	#[serde(rename_all = "camelCase")]
	InvokeResult { invocation_id: Uuid, result: Value, client: Uuid },
}

pub trait Logger {
	fn log(&self, message: &LogMessage);
}

pub struct NullLogger;

impl Logger for NullLogger {
	fn log(&self, _message: &LogMessage) {}
}

fn short_id(uuid: Uuid) -> String {
	uuid.to_hyphenated().to_string()[..7].to_string()
}

fn short_time() -> String {
	Local::now().format("%H:%M:%S%.6f").to_string()
}

struct UuidColorer {
	colors: Vec<Color>,
	assignments: HashMap<Uuid,Color>,
}

impl UuidColorer {
	fn new() -> Self {
		Self {
			colors: vec![
				Color::Red,
				Color::Green,
				Color::Yellow,
				Color::Blue,
				Color::Magenta,
				Color::Cyan,
				Color::BrightRed,
				Color::BrightGreen,
				Color::BrightYellow,
				Color::BrightBlue,
				Color::BrightMagenta,
				Color::BrightCyan,
			],
			assignments: HashMap::new(),
		}
	}
	
	fn assign_color(&mut self, uuid: Uuid) {
		if !self.colors.is_empty() {
			let color = self.colors.remove(0);
			self.assignments.insert(uuid, color);
		}
	}
	
	fn unassign_color(&mut self, uuid: Uuid) {
		if let Some(color) = self.assignments.remove(&uuid) {
			self.colors.push(color);
		}
	}
	
	fn get_color(&self, uuid: Uuid) -> Color {
		if let Some(color) = self.assignments.get(&uuid) {
			*color
		} else {
			Color::Black
		}
	}
}

pub struct StdoutLogger {
	colorer: RefCell<UuidColorer>,
}

impl StdoutLogger {
	pub fn new() -> Self {
		StdoutLogger {
			colorer: RefCell::new(UuidColorer::new()),
		}
	}
	
	fn print(&self, client: Uuid, text: String) {
		let color = self.colorer.borrow().get_color(client);
		let line = format!("{} {} {}", short_time(), short_id(client).color(color), text);
		
		println!("{}", line);
	}
}

impl Logger for StdoutLogger {
	fn log(&self, message: &LogMessage) {
		match message {
			LogMessage::ClientConnect { client } => {
				self.colorer.borrow_mut().assign_color(*client);
				self.print(*client, format!("connect"));
			},
			LogMessage::ClientDisconnect { client } => {
				self.print(*client, format!("disconnect"));
				self.colorer.borrow_mut().unassign_color(*client);
			},
			LogMessage::Get { pattern, client } => self.print(*client, format!("get {}", pattern)),
			LogMessage::Query { pattern, provide_rpc, query, client } => self.print(*client, format!("query {} -> {} (provide rpc: {})", pattern, short_id(*query), provide_rpc)),
			LogMessage::Unsubscribe { query, client } => self.print(*client, format!("unsubscribe {}", short_id(*query))),
			LogMessage::Set { object, value, client } => self.print(*client, format!("set {} {}", object, value)),
			LogMessage::Patch { object, value, client } => self.print(*client, format!("patch {} {}", object, value)),
			LogMessage::Remove { object, client } => self.print(*client, format!("remove {}", object)),
			LogMessage::Emit { object, event, data, client } => self.print(*client, format!("emit {} {} {}", object, event, data)),
			LogMessage::Invoke { object, method, args, invocation_id, client } => self.print(*client, format!("invoke {} {} {} {}", short_id(*invocation_id), object, method, args)),
			LogMessage::InvokeResult { invocation_id, result, client } => self.print(*client, format!("invoke-result {} {}", short_id(*invocation_id), result)),
		}
	}
}