Add support for JavaScript

api/analyzers/javascript/analyzer.py

@@ -0,0 +1,110 @@
+from pathlib import Path
+from typing import Optional
+
+from multilspy import SyncLanguageServer
+from ...entities.entity import Entity
+from ...entities.file import File
+from ..analyzer import AbstractAnalyzer
+
+import tree_sitter_javascript as tsjs
+from tree_sitter import Language, Node
+
+import logging
+logger = logging.getLogger('code_graph')
+
+
+class JavaScriptAnalyzer(AbstractAnalyzer):
+    def __init__(self) -> None:
+        super().__init__(Language(tsjs.language()))
+
+    def add_dependencies(self, path: Path, files: list[Path]):
+        pass
+
+    def get_entity_label(self, node: Node) -> str:
+        if node.type == 'function_declaration':
+            return "Function"
+        elif node.type == 'class_declaration':
+            return "Class"
+        elif node.type == 'method_definition':
+            return "Method"
+        raise ValueError(f"Unknown entity type: {node.type}")
+
+    def get_entity_name(self, node: Node) -> str:
+        if node.type in ['function_declaration', 'class_declaration', 'method_definition']:
+            name_node = node.child_by_field_name('name')
+            if name_node is None:
+                return ''
+            return name_node.text.decode('utf-8')
+        raise ValueError(f"Unknown entity type: {node.type}")
+
+    def get_entity_docstring(self, node: Node) -> Optional[str]:
+        if node.type in ['function_declaration', 'class_declaration', 'method_definition']:
+            if node.prev_sibling and node.prev_sibling.type == 'comment':
+                return node.prev_sibling.text.decode('utf-8')
+            return None
+        raise ValueError(f"Unknown entity type: {node.type}")
+
+    def get_entity_types(self) -> list[str]:
+        return ['function_declaration', 'class_declaration', 'method_definition']
+
+    def add_symbols(self, entity: Entity) -> None:
+        if entity.node.type == 'class_declaration':
+            heritage = entity.node.child_by_field_name('body')
+            if heritage is None:
+                return
+            superclass_node = entity.node.child_by_field_name('name')
+            # Check for `extends` clause via class_heritage
+            for child in entity.node.children:
+                if child.type == 'class_heritage':
+                    for heritage_child in child.children:
+                        if heritage_child.type == 'identifier':
+                            entity.add_symbol("base_class", heritage_child)
+        elif entity.node.type in ['function_declaration', 'method_definition']:
+            query = self.language.query("(call_expression) @reference.call")
+            captures = query.captures(entity.node)
+            if 'reference.call' in captures:
+                for caller in captures['reference.call']:
+                    entity.add_symbol("call", caller)
+            query = self.language.query("(formal_parameters (identifier) @parameter)")
+            captures = query.captures(entity.node)
+            if 'parameter' in captures:
+                for parameter in captures['parameter']:
+                    entity.add_symbol("parameters", parameter)
+
+    def is_dependency(self, file_path: str) -> bool:
+        return "node_modules" in file_path
+
+    def resolve_path(self, file_path: str, path: Path) -> str:
+        return file_path
+
+    def resolve_type(self, files: dict[Path, File], lsp: SyncLanguageServer, file_path: Path, path: Path, node: Node) -> list[Entity]:
+        res = []
+        for file, resolved_node in self.resolve(files, lsp, file_path, path, node):
+            type_dec = self.find_parent(resolved_node, ['class_declaration'])
+            if type_dec in file.entities:
+                res.append(file.entities[type_dec])
+        return res
+
+    def resolve_method(self, files: dict[Path, File], lsp: SyncLanguageServer, file_path: Path, path: Path, node: Node) -> list[Entity]:
+        res = []
+        if node.type == 'call_expression':
+            func_node = node.child_by_field_name('function')
+            if func_node and func_node.type == 'member_expression':
+                func_node = func_node.child_by_field_name('property')
+            if func_node:
+                node = func_node
+        for file, resolved_node in self.resolve(files, lsp, file_path, path, node):
+            method_dec = self.find_parent(resolved_node, ['function_declaration', 'method_definition', 'class_declaration'])
+            if method_dec and method_dec.type == 'class_declaration':
+                continue
+            if method_dec in file.entities:
+                res.append(file.entities[method_dec])
+        return res
+
+    def resolve_symbol(self, files: dict[Path, File], lsp: SyncLanguageServer, file_path: Path, path: Path, key: str, symbol: Node) -> list[Entity]:
+        if key in ["base_class", "parameters"]:
+            return self.resolve_type(files, lsp, file_path, path, symbol)
+        elif key in ["call"]:
+            return self.resolve_method(files, lsp, file_path, path, symbol)
+        else:
+            raise ValueError(f"Unknown key {key}")

api/analyzers/source_analyzer.py

@@ -11,6 +11,7 @@
 from .java.analyzer import JavaAnalyzer
 from .python.analyzer import PythonAnalyzer
 from .csharp.analyzer import CSharpAnalyzer
+from .javascript.analyzer import JavaScriptAnalyzer
 
 from multilspy import SyncLanguageServer
 from multilspy.multilspy_config import MultilspyConfig
@@ -26,7 +27,8 @@
     # '.h': CAnalyzer(),
     '.py': PythonAnalyzer(),
     '.java': JavaAnalyzer(),
-    '.cs': CSharpAnalyzer()}
+    '.cs': CSharpAnalyzer(),
+    '.js': JavaScriptAnalyzer()}
 
 class NullLanguageServer:
     def start_server(self):
@@ -143,7 +145,8 @@
             lsps[".cs"] = SyncLanguageServer.create(config, logger, str(path))
         else:
             lsps[".cs"] = NullLanguageServer()
-        with lsps[".java"].start_server(), lsps[".py"].start_server(), lsps[".cs"].start_server():
+        lsps[".js"] = NullLanguageServer()
+        with lsps[".java"].start_server(), lsps[".py"].start_server(), lsps[".cs"].start_server(), lsps[".js"].start_server():
             files_len = len(self.files)
             for i, file_path in enumerate(files):
                 file = self.files[file_path]
@@ -174,7 +177,7 @@
 
     def analyze_sources(self, path: Path, ignore: list[str], graph: Graph) -> None:
         path = path.resolve()
-        files = list(path.rglob("*.java")) + list(path.rglob("*.py")) + list(path.rglob("*.cs"))
+        files = list(path.rglob("*.java")) + list(path.rglob("*.py")) + list(path.rglob("*.cs")) + list(path.rglob("*.js"))
         # First pass analysis of the source code
         self.first_pass(path, files, ignore, graph)
 

pyproject.toml

@@ -14,6 +14,7 @@ dependencies = [
     "tree-sitter-python>=0.25.0,<0.26.0",
     "tree-sitter-java>=0.23.5,<0.24.0",
     "tree-sitter-c-sharp>=0.23.1,<0.24.0",
+    "tree-sitter-javascript>=0.25.0,<0.26.0",
     "flask>=3.1.0,<4.0.0",
     "python-dotenv>=1.0.1,<2.0.0",
     "multilspy @ git+https://github.com/AviAvni/multilspy.git@python-init-params",