class MinimalPromptParser:
    def __init__(self):
        self.parsed_data = []

    def parse_file(self, filename, user_input):
        with open(filename, 'r') as file:
            role = None
            content = ""
            for line in file:
                line = line.strip()
                if line.startswith("system:") or line.startswith("user:"):
                    if role is not None:
                        self.parsed_data.append({"role": role, "content": content})
                    role = line.split(":")[0]
                    content = ""
                else:
                    content += line + "\n"
            if role is not None:
                self.parsed_data.append({"role": role, "content": content})
        
        self.replace_placeholders(user_input)

        return self.parsed_data

    def replace_placeholders(self, user_input):
        for item in self.parsed_data:
            content = item["content"]
            for key, value in user_input.items():
                content = content.replace("{{" + key + "}}", value)
            item["content"] = content