dbus_message_parser/match_rule/
decode.rs

1use super::{
2    arg::Arg, arg_path::ArgPath, split::Split, unescape::unescape, MatchRule, MatchRuleError,
3};
4use crate::{
5    message::MessageType,
6    value::{Bus, Interface, Member, ObjectPath, UniqueConnectionName},
7};
8use std::convert::TryFrom;
9
10impl TryFrom<&str> for MatchRule {
11    type Error = MatchRuleError;
12
13    fn try_from(match_rule: &str) -> Result<Self, Self::Error> {
14        let (key, value) = match_rule
15            .split_once('=')
16            .ok_or(MatchRuleError::MissingEqual)?;
17
18        if key == "type" {
19            let r#type = unescape(value)?;
20            let r#type = MessageType::try_from(r#type.as_str())?;
21            Ok(MatchRule::Type(r#type))
22        } else if key == "sender" {
23            let sender = unescape(value)?;
24            let sender = Bus::try_from(sender.as_str())?;
25            Ok(MatchRule::Sender(sender))
26        } else if key == "interface" {
27            let interface = unescape(value)?;
28            match Interface::try_from(interface.as_str()) {
29                Ok(interface) => Ok(MatchRule::Interface(interface)),
30                Err(e) => Err(MatchRuleError::InterfaceError(e)),
31            }
32        } else if key == "member" {
33            let member = unescape(value)?;
34            let member = Member::try_from(member.as_str())?;
35            Ok(MatchRule::Member(member))
36        } else if key == "path" {
37            let path = unescape(value)?;
38            match ObjectPath::try_from(path.as_str()) {
39                Ok(path) => Ok(MatchRule::Path(path)),
40                Err(e) => Err(MatchRuleError::PathError(e)),
41            }
42        } else if key == "path_namespace" {
43            let path_namespace = unescape(value)?;
44            match ObjectPath::try_from(path_namespace.as_str()) {
45                Ok(path_namespace) => Ok(MatchRule::PathNamespace(path_namespace)),
46                Err(e) => Err(MatchRuleError::PathErrorNamespace(e)),
47            }
48        } else if key == "destination" {
49            let destination = unescape(value)?;
50            let destination = UniqueConnectionName::try_from(destination.as_str())?;
51            Ok(MatchRule::Destination(destination))
52        } else if let Some(key_arg) = key.strip_prefix("arg") {
53            if let Some(index) = key_arg.strip_suffix("path") {
54                let index = index.parse::<usize>()?;
55                let arg_path = unescape(value)?;
56                match ObjectPath::try_from(arg_path.as_str()) {
57                    Ok(arg_path) => Ok(MatchRule::ArgPath(ArgPath::from((index, arg_path)))),
58                    Err(e) => Err(MatchRuleError::ArgPathError(e)),
59                }
60            } else if key_arg == "0namespace" {
61                let arg0_namespace = unescape(value)?;
62                match Interface::try_from(arg0_namespace.as_str()) {
63                    Ok(arg0_namespace) => Ok(MatchRule::Arg0Namespace(arg0_namespace)),
64                    Err(e) => Err(MatchRuleError::Arg0NamespaceError(e)),
65                }
66            } else {
67                let index = key_arg.parse::<usize>()?;
68                let arg = unescape(value)?;
69                let arg = Arg::try_from((index, arg))?;
70                Ok(MatchRule::Arg(arg))
71            }
72        } else if key == "eavesdrop" {
73            let eavesdrop = unescape(value)?;
74            match eavesdrop.as_str() {
75                "true" => Ok(MatchRule::Eavesdrop(true)),
76                "false" => Ok(MatchRule::Eavesdrop(false)),
77                _ => Err(MatchRuleError::EavesdropUnknown),
78            }
79        } else {
80            Err(MatchRuleError::KeyUnknown)
81        }
82    }
83}
84
85impl MatchRule {
86    pub fn decode(match_rules: &str) -> Result<Vec<MatchRule>, MatchRuleError> {
87        let mut result = Vec::new();
88        for match_rule in Split::new(match_rules) {
89            let match_rule = MatchRule::try_from(match_rule?)?;
90            result.push(match_rule);
91        }
92        Ok(result)
93    }
94}
dbus_message_parser/match_rule/decode.rs

dbus_message_parser/match_rule/
decode.rs
