cha_core/plugins/
message_chain.rs

1use crate::{AnalysisContext, Finding, Location, Plugin, Severity, SmellCategory};
2
3/// Detect deep method chain calls (e.g. a.b().c().d()).
4pub struct MessageChainAnalyzer {
5    pub max_depth: usize,
6}
7
8impl Default for MessageChainAnalyzer {
9    fn default() -> Self {
10        Self { max_depth: 3 }
11    }
12}
13
14impl Plugin for MessageChainAnalyzer {
15    fn name(&self) -> &str {
16        "message_chain"
17    }
18
19    fn description(&self) -> &str {
20        "Deep field access chains (a.b.c.d)"
21    }
22
23    fn analyze(&self, ctx: &AnalysisContext) -> Vec<Finding> {
24        ctx.model
25            .functions
26            .iter()
27            .filter(|f| f.chain_depth > self.max_depth)
28            .map(|f| Finding {
29                smell_name: "message_chain".into(),
30                category: SmellCategory::Couplers,
31                severity: Severity::Warning,
32                location: Location {
33                    path: ctx.file.path.clone(),
34                    start_line: f.start_line,
35                    end_line: f.end_line,
36                    name: Some(f.name.clone()),
37                },
38                message: format!(
39                    "Function `{}` has chain depth {} (threshold: {})",
40                    f.name, f.chain_depth, self.max_depth
41                ),
42                suggested_refactorings: vec!["Hide Delegate".into()],
43                actual_value: Some(f.chain_depth as f64),
44                threshold: Some(self.max_depth as f64),
45            })
46            .collect()
47    }
48}
cha_core/plugins/message_chain.rs

cha_core/plugins/
message_chain.rs
