[pitboss] phase 17: Track L.15 — Gin / Echo / Fiber / Chi adapters + Axum / Actix / Rocket / Warp adapters

src/dynamic/framework/adapters/go_echo.rs

@@ -0,0 +1,127 @@
+//! Echo [`super::super::FrameworkAdapter`] (Phase 17 — Track L.15).
+//!
+//! Recognises the canonical echo route declaration:
+//!
+//! ```go
+//! e := echo.New()
+//! e.GET("/users/:id", Show)
+//! e.POST("/save", func(c echo.Context) error { return nil })
+//! ```
+//!
+//! The adapter binds the route to the function whose name matches
+//! `summary.name`; the path-placeholder syntax (`:id`) shares the
+//! same vocabulary as gin / fiber.
+
+use crate::dynamic::framework::{FrameworkAdapter, FrameworkBinding, RouteShape};
+use crate::evidence::EntryKind;
+use crate::summary::FuncSummary;
+use crate::symbol::Lang;
+use tree_sitter::Node;
+
+use super::go_routes::{
+    bind_go_path_params, find_go_function, find_route_for_callee, go_formal_names,
+    source_imports_echo,
+};
+
+pub struct GoEchoAdapter;
+
+const ADAPTER_NAME: &str = "go-echo";
+
+impl FrameworkAdapter for GoEchoAdapter {
+    fn name(&self) -> &'static str {
+        ADAPTER_NAME
+    }
+
+    fn lang(&self) -> Lang {
+        Lang::Go
+    }
+
+    fn detect(
+        &self,
+        summary: &FuncSummary,
+        ast: Node<'_>,
+        file_bytes: &[u8],
+    ) -> Option<FrameworkBinding> {
+        if !source_imports_echo(file_bytes) {
+            return None;
+        }
+        let (method, path) = find_route_for_callee(ast, file_bytes, &summary.name)?;
+        let request_params = find_go_function(ast, file_bytes, &summary.name)
+            .map(|func| {
+                let formals = go_formal_names(func, file_bytes);
+                bind_go_path_params(&formals, &path)
+            })
+            .unwrap_or_default();
+        Some(FrameworkBinding {
+            adapter: ADAPTER_NAME.to_owned(),
+            kind: EntryKind::HttpRoute,
+            route: Some(RouteShape { method, path }),
+            request_params,
+            response_writer: None,
+            middleware: Vec::new(),
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::dynamic::framework::{HttpMethod, ParamSource};
+
+    fn parse(src: &[u8]) -> tree_sitter::Tree {
+        let mut parser = tree_sitter::Parser::new();
+        let lang = tree_sitter::Language::from(tree_sitter_go::LANGUAGE);
+        parser.set_language(&lang).unwrap();
+        parser.parse(src, None).unwrap()
+    }
+
+    fn summary(name: &str) -> FuncSummary {
+        FuncSummary {
+            name: name.into(),
+            lang: "go".into(),
+            ..Default::default()
+        }
+    }
+
+    #[test]
+    fn fires_on_get_with_identifier_callable() {
+        let src: &[u8] = b"package main\nimport \"github.com/labstack/echo/v4\"\n\
+            func init() { e := echo.New(); e.GET(\"/users/:id\", Show) }\n\
+            func Show(c echo.Context, id string) error { return nil }\n";
+        let tree = parse(src);
+        let binding = GoEchoAdapter
+            .detect(&summary("Show"), tree.root_node(), src)
+            .expect("binding");
+        assert_eq!(binding.adapter, "go-echo");
+        let route = binding.route.expect("route");
+        assert_eq!(route.method, HttpMethod::GET);
+        assert_eq!(route.path, "/users/:id");
+        let id = binding
+            .request_params
+            .iter()
+            .find(|p| p.name == "id")
+            .unwrap();
+        assert!(matches!(id.source, ParamSource::PathSegment(_)));
+    }
+
+    #[test]
+    fn fires_on_put_verb() {
+        let src: &[u8] = b"package main\nimport \"github.com/labstack/echo\"\n\
+            func init() { e := echo.New(); e.PUT(\"/users/:id\", Update) }\n\
+            func Update(c echo.Context, id string) error { return nil }\n";
+        let tree = parse(src);
+        let binding = GoEchoAdapter
+            .detect(&summary("Update"), tree.root_node(), src)
+            .expect("binding");
+        assert_eq!(binding.route.unwrap().method, HttpMethod::PUT);
+    }
+
+    #[test]
+    fn skips_when_echo_not_imported() {
+        let src: &[u8] = b"package main\nfunc Show() {}\n";
+        let tree = parse(src);
+        assert!(GoEchoAdapter
+            .detect(&summary("Show"), tree.root_node(), src)
+            .is_none());
+    }
+}