API Version Migration Project — End-to-End Version Upgrade Implementation

class MigrationProject:
    def __init__(self, name: str, from_ver: str, to_ver: str):
        self.name = name
        self.from_ver = from_ver
        self.to_ver = to_ver
        self.phases: List[Dict] = []
        self.consumers: List[Dict] = []

    def add_phase(self, name: str, duration_days: int, tasks: List[str]):
        self.phases.append({"name": name, "duration": duration_days, "tasks": tasks})

    def register_consumer(self, consumer_id: str, email: str):
        self.consumers.append({"id": consumer_id, "email": email, "migrated": False})

    def get_timeline(self) -> str:
        total_days = sum(p["duration"] for p in self.phases)
        return f"Migration project '{self.name}': {len(self.phases)} phases over {total_days} days, {len(self.consumers)} consumers"

project = MigrationProject("v1-to-v2", "v1", "v2")
project.add_phase("Planning", 14, ["Audit consumers", "Create migration guide"])
project.add_phase("Parallel Run", 30, ["Deploy v2 alongside v1", "Monitor v2 stability"])
project.add_phase("Cutover", 7, ["Notify consumers", "Switch default to v2"])
project.add_phase("Sunset", 60, ["Monitor v1 traffic", "Disable v1"])
print(project.get_timeline())