add JavaScript interface

Author: kguzek

README.md

@@ -72,7 +72,7 @@ Planned available languages:
 
 - [x] python
 - [x] python3 (thanks [@dancikmad](https://github.com/dancikmad))
-- [ ] javascript
+- [x] javascript
 - [ ] typescript
 - [x] c
 - [ ] cpp

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "leetcode-project-generator"
-version = "1.3.1"
+version = "1.4.0"
 authors = [
   { name = "Konrad Guzek", email = "[email protected]" },
 ]

src/lpg/interfaces/file.py

@@ -6,11 +6,13 @@
 
 from .lang.base import BaseLanguageInterface
 from .lang.c import CLanguageInterface
+from .lang.javascript import JavaScriptLanguageInterface
 from .lang.python import PythonLanguageInterface
 from .lang.python3 import Python3LanguageInterface
 
 LANGUAGE_INTERFACES: dict[str, BaseLanguageInterface] = {
     "c": CLanguageInterface(),
+    "javascript": JavaScriptLanguageInterface(),
     "python": PythonLanguageInterface(),
     "python3": Python3LanguageInterface(),
 }

src/lpg/interfaces/lang/c.py

@@ -12,7 +12,7 @@
 #include "solution.h"
 
 int main() {{
-    {param_declarations};
+    {params_setup};
     {result_var_declaration}{name}({params_call});
     printf("{OUTPUT_RESULT_PREFIX} %d\\n", {result_var});
     return 0;
@@ -42,9 +42,7 @@ class CLanguageInterface(BaseLanguageInterface):
     def prepare_project_files(self, template: str):
 
         params = self.groups["params"].split(", ")
-        self.groups["param_declarations"] = self.groups["params"].replace(
-            ", ", ";\n    "
-        )
+        self.groups["params_setup"] = self.groups["params"].replace(", ", ";\n    ")
         self.groups["params_call"] = ", ".join(param.split()[-1] for param in params)
 
         headers = ""

src/lpg/interfaces/lang/javascript.py

@@ -0,0 +1,37 @@
+"""Project generator for the JavaScript language."""
+
+import re
+
+from .base import BaseLanguageInterface
+
+FUNCTION_SIGNATURE_PATTERN = re.compile(
+    r"^var (?P<name>\w+) =(?P<async> async)? function\((?P<params>[^)]*?)(?:\.\.\.\w+)?\) \{$",
+    flags=re.MULTILINE,
+)
+
+TEST_FILE_TEMPLATE = """\
+import solution from "./solution.js";
+{params_setup}
+const result = {await}solution({params});
+console.log("{OUTPUT_RESULT_PREFIX}", result);
+"""
+
+
+class JavaScriptLanguageInterface(BaseLanguageInterface):
+    """Implementation of the JavaScript language project template interface."""
+
+    function_signature_pattern = FUNCTION_SIGNATURE_PATTERN
+    compile_command = None
+    test_command = ["node", "test.js"]
+    default_output = "undefined"
+
+    def prepare_project_files(self, template: str):
+        self.groups["params_setup"] = ""
+        for param in self.groups["params"].split(", "):
+            if param.strip():
+                self.groups["params_setup"] += f"\nconst {param} = undefined;"
+        self.groups["await"] = "await " if self.groups["async"] else ""
+        return {
+            "solution.js": f"{template}\nexport default {self.groups['name']};",
+            "test.js": TEST_FILE_TEMPLATE.format(**self.groups),
+        }