computer-playbook/plugins/lookup/objstore.py

from __future__ import annotations

from typing import Any

from ansible.errors import AnsibleError
from ansible.plugins.loader import lookup_loader
from ansible.plugins.lookup import LookupBase

from utils.roles.applications.config import get
from utils.roles.entity_name import get_entity_name
from utils.tls_common import resolve_enabled

OBJSTORE_ENGINES = ("seaweedfs", "minio")
OBJSTORE_PROVIDER_ROLE = {
    "seaweedfs": "web-app-seaweedfs",
    "minio": "web-app-minio",
}
OBJSTORE_DEFAULT_PORT = {"seaweedfs": 8333, "minio": 9000}
OBJSTORE_DEFAULT_IMAGE = {
    "seaweedfs": "chrislusf/seaweedfs",
    "minio": "quay.io/minio/minio",
}
OBJSTORE_DEFAULT_REGION = "us-east-1"


def _is_enabled(applications: dict[str, Any], consumer_id: str, engine: str) -> bool:
    return bool(
        get(
            applications,
            consumer_id,
            f"services.{engine}.enabled",
            strict=False,
            default=False,
        )
    )


class LookupModule(LookupBase):
    """
    Resolve engine-agnostic S3 object-store values for a consumer.

    Mirrors plugins/lookup/database.py (postgres|mariadb): branches on which
    object-store engine (seaweedfs|minio) the consumer has enabled and yields a
    uniform S3 connection payload, so consumer templates stay engine-agnostic.

    API (STRICT):
      - {{ lookup('objstore', consumer_id) }}
      - {{ lookup('objstore', consumer_id, 'url') }}
    """

    def run(
        self,
        terms: list[Any],
        variables: dict[str, Any] | None = None,
        **kwargs: Any,
    ) -> list[Any]:
        terms = terms or []
        if len(terms) not in (1, 2):
            raise AnsibleError("objstore: requires consumer_id [, want_path]")

        consumer_id = str(terms[0]).strip()
        if not consumer_id:
            raise AnsibleError("objstore: consumer_id must not be empty")

        want = str(terms[1]).strip() if len(terms) == 2 else ""
        if not want:
            want = "all"

        vars_ = variables or self._templar.available_variables
        applications = lookup_loader.get(
            "applications",
            loader=self._loader,
            templar=getattr(self, "_templar", None),
        ).run([], variables=vars_)[0]
        path_instances = self._require_var(vars_, "DIR_COMPOSITIONS")
        consumer_entity = get_entity_name(consumer_id)

        active = [
            e for e in OBJSTORE_ENGINES if _is_enabled(applications, consumer_id, e)
        ]
        if len(active) > 1:
            raise AnsibleError(
                f"objstore: multiple object-store engines enabled for "
                f"'{consumer_id}': {active}; enable only one."
            )
        engine = active[0] if active else ""

        if not engine:
            resolved = {
                "id": "",
                "engine": "",
                "enabled": False,
                "shared": False,
                "local": False,
                "host": "",
                "port": "",
                "network": "",
                "container": "",
                "bucket": consumer_entity,
                "public": False,
                "access_key": consumer_entity,
                "secret_key": "",
                "image": "",
                "version": "",
                "region": OBJSTORE_DEFAULT_REGION,
                "env": "",
                "volume": "",
                "endpoint": "",
                "url": "",
                "public_domain": "",
                "public_bucket": "",
                "public_url": "",
                "reach_host": "127.0.0.1",
            }
            return [resolved if want == "all" else resolved.get(want, "")]

        provider_role = OBJSTORE_PROVIDER_ROLE[engine]
        shared = bool(
            get(
                applications,
                consumer_id,
                f"services.{engine}.shared",
                strict=False,
                default=False,
            )
        )
        central_enabled = shared

        central_name = get(
            applications,
            provider_role,
            f"services.{engine}.name",
            strict=False,
            default=engine,
            skip_missing_app=True,
        )
        central_name = (
            str(central_name) if central_name is not None else ""
        ).strip() or engine

        host = central_name if central_enabled else engine
        network = get_entity_name(provider_role) if central_enabled else consumer_entity
        container = central_name if central_enabled else f"{consumer_entity}-{engine}"
        port = get(
            applications,
            provider_role,
            f"services.{engine}.api_port",
            strict=False,
            default=OBJSTORE_DEFAULT_PORT[engine],
            skip_missing_app=True,
        )
        region = get(
            applications,
            provider_role,
            f"services.{engine}.region",
            strict=False,
            default=OBJSTORE_DEFAULT_REGION,
            skip_missing_app=True,
        )

        access_key = consumer_entity
        secret_key = get(
            applications,
            consumer_id,
            "credentials.objstore_secret_key",
            strict=False,
            default="",
        )
        bucket = consumer_entity
        public = bool(
            get(
                applications,
                consumer_id,
                f"services.{engine}.public",
                strict=False,
                default=False,
            )
        )

        image = get(
            applications,
            provider_role,
            f"services.{engine}.image",
            strict=False,
            default=OBJSTORE_DEFAULT_IMAGE[engine],
            skip_missing_app=True,
        )
        default_version = get(
            applications,
            provider_role,
            f"services.{engine}.version",
            strict=False,
            default="latest",
            skip_missing_app=True,
        )
        version = get(
            applications,
            consumer_id,
            f"services.{engine}.version",
            strict=False,
            default=default_version,
        )

        env = f"{path_instances}{consumer_entity}/.env/objstore.env"
        volume_prefix = "" if central_enabled else f"{consumer_entity}_"
        volume = (
            f"{volume_prefix}{engine}"
            if bool(_is_enabled(applications, consumer_id, engine) and not shared)
            else ""
        )
        endpoint = f"{host}:{port}"
        url = f"http://{endpoint}"

        public_domain = get(
            applications,
            provider_role,
            "domains.canonical.api",
            strict=False,
            default="",
            skip_missing_app=True,
        )
        public_domain = (
            str(public_domain) if public_domain is not None else ""
        ).strip()
        public_bucket = f"{public_domain}/{bucket}" if public_domain else ""
        provider_app = applications.get(provider_role) or {}
        if not isinstance(provider_app, dict):
            provider_app = {}
        scheme = (
            "https"
            if resolve_enabled(provider_app, bool(vars_.get("TLS_ENABLED", True)))
            else "http"
        )
        public_url = f"{scheme}://{public_bucket}" if public_bucket else ""

        resolved = {
            "id": provider_role,
            "engine": engine,
            "enabled": True,
            "shared": shared,
            "local": bool(not shared),
            "host": host,
            "port": port,
            "network": network,
            "container": container,
            "bucket": bucket,
            "public": public,
            "access_key": access_key,
            "secret_key": secret_key,
            "image": image,
            "version": version,
            "region": region,
            "env": env,
            "volume": volume,
            "endpoint": endpoint,
            "url": url,
            "public_domain": public_domain,
            "public_bucket": public_bucket,
            "public_url": public_url,
            "reach_host": "127.0.0.1",
        }
        return [resolved if want == "all" else resolved.get(want, "")]

    @staticmethod
    def _require_var(vars_: dict[str, Any], key: str) -> Any:
        if key not in vars_:
            raise AnsibleError(f"objstore: required variable '{key}' is not set")
        return vars_[key]