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use super::{add_contains_edge, add_node_if_missing, make_file_node, run_query_named};
use crate::error::Result;
use crate::extract::{make_id, ImportNode, LanguageExtractor};
use crate::types::{Edge, ExtractionFragment, Node};
use std::collections::HashMap;
use std::path::Path;
pub struct TsCppExtractor;
impl TsCppExtractor {
pub fn extract(source: &[u8], path: &Path) -> Result<ExtractionFragment> {
let (file_id, _, file_node) = make_file_node(path);
let mut fragment = ExtractionFragment {
nodes: vec![file_node],
edges: vec![],
};
let lang = tree_sitter_cpp::LANGUAGE.into();
// Class declarations
let class_query = r#"
(class_specifier
name: (type_identifier) @class.name
)
"#;
if let Ok(mut captures) = run_query_named(source, &lang, class_query) {
let names = captures.remove("class.name").unwrap_or_default();
for name in &names {
let class_id = make_id(&[&file_id, name]);
add_node_if_missing(
&mut fragment,
Node {
id: class_id.clone(),
label: name.to_string(),
file_type: "class".to_string(),
source_file: path.to_string_lossy().to_string(),
source_location: None,
community: None,
rationale: None,
docstring: None,
metadata: HashMap::new(),
},
);
add_contains_edge(&mut fragment, &file_id, class_id, path);
}
}
// Struct declarations
let struct_query = r#"
(struct_specifier
name: (type_identifier) @struct.name
)
"#;
if let Ok(mut captures) = run_query_named(source, &lang, struct_query) {
let names = captures.remove("struct.name").unwrap_or_default();
for name in &names {
let id = make_id(&[&file_id, name]);
add_node_if_missing(
&mut fragment,
Node {
id: id.clone(),
label: name.to_string(),
file_type: "struct".to_string(),
source_file: path.to_string_lossy().to_string(),
source_location: None,
community: None,
rationale: None,
docstring: None,
metadata: HashMap::new(),
},
);
add_contains_edge(&mut fragment, &file_id, id, path);
}
}
// Class inheritance: base_clause inside class_specifier
let _inherits_query = r#"
(class_specifier
name: (type_identifier) @child.name
(base_class_clause
(type_identifier) @base.name
)
)
"#;
// Since run_query_named doesn't associate captures within a match,
// we use a simple heuristic: class/struct with a base clause inherits from that base.
// We need a different approach - use the walker pattern.
Self::extract_inheritance(source, path, &file_id, &lang, &mut fragment);
// Top-level free functions (identifier declarator = not a member)
let fn_top_query = r#"
(function_definition
declarator: (function_declarator
declarator: (identifier) @fn.name
)
)
"#;
if let Ok(mut captures) = run_query_named(source, &lang, fn_top_query) {
for name in captures.remove("fn.name").unwrap_or_default() {
let fn_id = make_id(&[&file_id, &name, "()"]);
add_node_if_missing(
&mut fragment,
Node {
id: fn_id.clone(),
label: format!("{}()", name),
file_type: "function".to_string(),
source_file: path.to_string_lossy().to_string(),
source_location: None,
community: None,
rationale: None,
docstring: None,
metadata: HashMap::new(),
},
);
add_contains_edge(&mut fragment, &file_id, fn_id, path);
}
}
// Member function definitions / declarations (field_identifier = inside a class body)
let fn_member_query = r#"
[
(function_definition
declarator: (function_declarator
declarator: (field_identifier) @method.name
)
)
(field_declaration
declarator: (function_declarator
declarator: (field_identifier) @method.name
)
)
]
"#;
if let Ok(mut captures) = run_query_named(source, &lang, fn_member_query) {
for name in captures.remove("method.name").unwrap_or_default() {
let fn_id = make_id(&[&file_id, &name, "()"]);
add_node_if_missing(
&mut fragment,
Node {
id: fn_id.clone(),
label: format!("{}()", name),
file_type: "method".to_string(),
source_file: path.to_string_lossy().to_string(),
source_location: None,
community: None,
rationale: None,
docstring: None,
metadata: HashMap::new(),
},
);
add_contains_edge(&mut fragment, &file_id, fn_id, path);
}
}
// Preprocessor includes with context="import"
let include_query = r#"
[
(preproc_include path: (string_literal) @include.path)
(preproc_include path: (system_lib_string) @include.path)
]
"#;
if let Ok(mut captures) = run_query_named(source, &lang, include_query) {
for p in captures.remove("include.path").unwrap_or_default() {
let inc = p
.trim()
.trim_matches('"')
.trim_matches('<')
.trim_matches('>');
let inc_id = make_id(&[&file_id, inc]);
add_node_if_missing(
&mut fragment,
Node {
id: inc_id.clone(),
label: inc.to_string(),
file_type: "code".to_string(),
source_file: path.to_string_lossy().to_string(),
source_location: None,
community: None,
rationale: None,
docstring: None,
metadata: HashMap::new(),
},
);
fragment.edges.push(Edge {
source: file_id.clone(),
target: inc_id,
relation: "imports".to_string(),
confidence: "EXTRACTED".to_string(),
source_file: Some(path.to_string_lossy().to_string()),
weight: 1.0,
context: Some("import".to_string()),
});
}
}
Ok(fragment)
}
fn extract_inheritance(
source: &[u8],
path: &Path,
file_id: &str,
lang: &tree_sitter::Language,
fragment: &mut ExtractionFragment,
) {
use tree_sitter::{Node as TsNode, Parser};
let mut parser = Parser::new();
if parser.set_language(lang).is_err() {
return;
}
let tree = match parser.parse(source, None) {
Some(t) => t,
None => return,
};
fn text(source: &[u8], node: &TsNode<'_>) -> String {
std::str::from_utf8(&source[node.start_byte()..node.end_byte()])
.unwrap_or("")
.trim()
.to_string()
}
fn walk(
node: TsNode<'_>,
source: &[u8],
path: &Path,
file_id: &str,
fragment: &mut ExtractionFragment,
) {
let kind = node.kind();
if kind == "class_specifier" || kind == "struct_specifier" {
// Find name
let name_node = node.child_by_field_name("name");
if let Some(name_node) = name_node {
let class_name = text(source, &name_node);
let class_id = make_id(&[file_id, &class_name]);
// Find base_class_clause
for i in 0..node.child_count() {
if let Some(child) = node.child(i) {
if child.kind() == "base_class_clause" {
// Find type_identifier children (the base classes)
for j in 0..child.child_count() {
if let Some(base) = child.child(j) {
if base.kind() == "type_identifier" {
let base_name = text(source, &base);
let base_id = make_id(&[&base_name]);
add_node_if_missing(
fragment,
Node {
id: base_id.clone(),
label: base_name,
file_type: "code".to_string(),
source_file: path.to_string_lossy().to_string(),
source_location: None,
community: None,
rationale: None,
docstring: None,
metadata: HashMap::new(),
},
);
let already = fragment.edges.iter().any(|e| {
e.relation == "inherits"
&& e.source == class_id
&& e.target == base_id
});
if !already {
fragment.edges.push(Edge {
source: class_id.clone(),
target: base_id,
relation: "inherits".to_string(),
confidence: "EXTRACTED".to_string(),
source_file: Some(
path.to_string_lossy().to_string(),
),
weight: 1.0,
context: None,
});
}
}
}
}
}
// Walk body
walk(child, source, path, file_id, fragment);
}
}
}
return;
}
for i in 0..node.child_count() {
if let Some(child) = node.child(i) {
walk(child, source, path, file_id, fragment);
}
}
}
walk(tree.root_node(), source, path, file_id, fragment);
}
}
impl LanguageExtractor for TsCppExtractor {
fn file_extensions(&self) -> Vec<&'static str> {
vec!["cpp", "cxx", "hpp", "hxx", "cc"]
}
fn extract(&self, source: &[u8], path: &Path) -> Result<ExtractionFragment> {
Self::extract(source, path)
}
fn resolve_imports(&self, _imports: &[ImportNode]) -> Vec<Edge> {
vec![]
}
fn collect_type_refs(&self, _fragment: &mut ExtractionFragment) {}
}