use deagle_core::{DeagleError, EdgeKind, Language, Node, NodeKind, Result};
use std::path::Path;
use crate::ParseResult;
pub fn parse(path: &Path, content: &str) -> Result<Vec<Node>> {
parse_with_edges(path, content).map(|r| r.nodes)
}
pub fn parse_with_edges(path: &Path, content: &str) -> Result<ParseResult> {
let mut parser = tree_sitter::Parser::new();
let language = tree_sitter_go::LANGUAGE;
parser.set_language(&language.into()).map_err(|e| DeagleError::Parse {
file: path.display().to_string(),
message: format!("Failed to set language: {}", e),
})?;
let tree = parser.parse(content, None).ok_or_else(|| DeagleError::Parse {
file: path.display().to_string(),
message: "Failed to parse file".into(),
})?;
let mut nodes = Vec::new();
let file_path = path.to_string_lossy().to_string();
nodes.push(Node {
id: 0,
name: path.file_name().and_then(|n| n.to_str()).unwrap_or("unknown").to_string(),
kind: NodeKind::File,
language: Language::Go,
file_path: file_path.clone(),
line_start: 1,
line_end: content.lines().count() as u32,
content: None,
});
extract_definitions(tree.root_node(), content, &file_path, &mut nodes);
let mut edges = Vec::new();
for i in 1..nodes.len() {
edges.push((0, i, EdgeKind::Contains));
}
Ok(ParseResult { nodes, edges })
}
fn extract_definitions(
node: tree_sitter::Node,
source: &str,
file_path: &str,
results: &mut Vec<Node>,
) {
let kind = match node.kind() {
"function_declaration" => Some(NodeKind::Function),
"method_declaration" => Some(NodeKind::Method),
"type_declaration" => None, "type_spec" => {
if let Some(type_node) = node.child_by_field_name("type") {
match type_node.kind() {
"struct_type" => Some(NodeKind::Struct),
"interface_type" => Some(NodeKind::Interface),
_ => Some(NodeKind::TypeAlias),
}
} else {
None
}
}
"import_declaration" => Some(NodeKind::Import),
"const_declaration" | "var_declaration" => None, "const_spec" => Some(NodeKind::Constant),
"package_clause" => Some(NodeKind::Module),
_ => None,
};
if let Some(kind) = kind {
if let Some(name) = extract_name(node, source, kind) {
let start = node.start_position();
let end = node.end_position();
let content = node.utf8_text(source.as_bytes()).ok().map(|s| {
if s.len() > 500 { format!("{}...", &s[..500]) } else { s.to_string() }
});
results.push(Node {
id: 0,
name,
kind,
language: Language::Go,
file_path: file_path.to_string(),
line_start: (start.row + 1) as u32,
line_end: (end.row + 1) as u32,
content,
});
}
}
let mut cursor = node.walk();
for child in node.children(&mut cursor) {
extract_definitions(child, source, file_path, results);
}
}
fn extract_name(node: tree_sitter::Node, source: &str, kind: NodeKind) -> Option<String> {
match kind {
NodeKind::Import => {
node.utf8_text(source.as_bytes())
.ok()
.map(|s| s.trim().to_string())
}
NodeKind::Module => {
if let Some(n) = node.child_by_field_name("name") {
return n.utf8_text(source.as_bytes()).ok().map(|s| s.to_string());
}
let mut c = node.walk();
let children: Vec<_> = node.children(&mut c).collect();
children.iter()
.find(|n| n.kind() == "package_identifier")
.and_then(|n| n.utf8_text(source.as_bytes()).ok())
.map(|s| s.to_string())
}
_ => {
node.child_by_field_name("name")
.and_then(|n| n.utf8_text(source.as_bytes()).ok())
.map(|s| s.to_string())
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::path::PathBuf;
const SAMPLE_GO: &str = r#"
package main
import (
"fmt"
"net/http"
)
const MaxSize = 1024
type Config struct {
Name string
Values map[string]string
}
type Handler interface {
ServeHTTP(w http.ResponseWriter, r *http.Request)
}
func NewConfig(name string) *Config {
return &Config{Name: name, Values: make(map[string]string)}
}
func (c *Config) Get(key string) string {
return c.Values[key]
}
func main() {
config := NewConfig("test")
fmt.Println(config.Get("key"))
}
"#;
#[test]
fn test_parse_go_finds_all_definitions() {
let path = PathBuf::from("main.go");
let nodes = parse(&path, SAMPLE_GO).unwrap();
let kinds: Vec<_> = nodes.iter().map(|n| n.kind).collect();
assert!(kinds.contains(&NodeKind::Module), "should find package");
assert!(kinds.contains(&NodeKind::Import), "should find import");
assert!(kinds.contains(&NodeKind::Constant), "should find const");
assert!(kinds.contains(&NodeKind::Struct), "should find struct");
assert!(kinds.contains(&NodeKind::Interface), "should find interface");
assert!(kinds.contains(&NodeKind::Function), "should find function");
assert!(kinds.contains(&NodeKind::Method), "should find method");
}
#[test]
fn test_parse_go_struct_name() {
let path = PathBuf::from("main.go");
let nodes = parse(&path, SAMPLE_GO).unwrap();
let structs: Vec<_> = nodes.iter().filter(|n| n.kind == NodeKind::Struct).collect();
assert_eq!(structs.len(), 1);
assert_eq!(structs[0].name, "Config");
assert_eq!(structs[0].language, Language::Go);
}
#[test]
fn test_parse_go_methods() {
let path = PathBuf::from("main.go");
let nodes = parse(&path, SAMPLE_GO).unwrap();
let methods: Vec<_> = nodes.iter().filter(|n| n.kind == NodeKind::Method).collect();
assert!(methods.iter().any(|m| m.name == "Get"), "should find Get method");
}
#[test]
fn test_parse_go_functions() {
let path = PathBuf::from("main.go");
let nodes = parse(&path, SAMPLE_GO).unwrap();
let fns: Vec<_> = nodes.iter().filter(|n| n.kind == NodeKind::Function).collect();
assert!(fns.iter().any(|f| f.name == "NewConfig"));
assert!(fns.iter().any(|f| f.name == "main"));
}
#[test]
fn test_parse_go_interface() {
let path = PathBuf::from("main.go");
let nodes = parse(&path, SAMPLE_GO).unwrap();
let ifaces: Vec<_> = nodes.iter().filter(|n| n.kind == NodeKind::Interface).collect();
assert_eq!(ifaces.len(), 1);
assert_eq!(ifaces[0].name, "Handler");
}
#[test]
fn test_parse_go_edges() {
let path = PathBuf::from("main.go");
let result = parse_with_edges(&path, SAMPLE_GO).unwrap();
assert!(!result.edges.is_empty());
for &(from, _, ref kind) in &result.edges {
assert_eq!(from, 0);
assert_eq!(*kind, EdgeKind::Contains);
}
}
#[test]
fn test_parse_empty_go() {
let path = PathBuf::from("empty.go");
let nodes = parse(&path, "").unwrap();
assert!(nodes.len() <= 1);
}
}