web: frontend request backend, bicycle: templates_engine

templates_engine.py

@@ -0,0 +1,33 @@
+"""
+Features:
+include files
+insert variables from context dict
+"""
+from os.path import join
+import re
+templates_dir = 'templates'
+
+variable_pattern: re.Pattern = re.compile(r'\{\{ .* }}')
+include_pattern: re.Pattern = re.compile(r'\{\{ @.* }}')
+
+
+def render(template_name: str, context: dict):
+    template_path = join(templates_dir, template_name)
+    template = get_file_content(template_path)
+
+    for include_statement in re.findall(include_pattern, template):
+        file_include = include_statement.split(' ')[1][1:]
+        include_content = get_file_content(join(templates_dir, file_include))
+        template = template.replace(include_statement, include_content)
+
+    for var_to_replace in re.findall(variable_pattern, template):
+        key = var_to_replace.split(' ')[1]
+        template = template.replace(var_to_replace, context[key])
+
+    return template
+
+
+def get_file_content(filename: str) -> str:
+    with open(filename, 'r', encoding='utf-8') as file:
+        # it will throw exception if file doesn't exist
+        return file.read()