Support importing Blueprints from the Home Assistant websites (#95340)

* Support importing Blueprints from the Home Assistant websites

* Improve test coverage

homeassistant/components/blueprint/importer.py

@@ -1,6 +1,8 @@
 """Import logic for blueprint."""
+
 from __future__ import annotations
 
+from contextlib import suppress
 from dataclasses import dataclass
 import html
 import re
@@ -28,6 +30,10 @@
     r"^https://github.com/(?P<repository>.+)/blob/(?P<path>.+)$"
 )
 
+WEBSITE_PATTERN = re.compile(
+    r"^https://(?P<subdomain>[a-z0-9-]+)\.home-assistant\.io/(?P<path>.+).yaml$"
+)
+
 COMMUNITY_TOPIC_SCHEMA = vol.Schema(
     {
         "slug": str,
@@ -219,18 +225,37 @@ async def fetch_blueprint_from_github_gist_url(
     )
 
 
+async def fetch_blueprint_from_website_url(
+    hass: HomeAssistant, url: str
+) -> ImportedBlueprint:
+    """Get a blueprint from our website."""
+    if (WEBSITE_PATTERN.match(url)) is None:
+        raise UnsupportedUrl("Not a Home Assistant website URL")
+
+    session = aiohttp_client.async_get_clientsession(hass)
+
+    resp = await session.get(url, raise_for_status=True)
+    raw_yaml = await resp.text()
+    data = yaml.parse_yaml(raw_yaml)
+    assert isinstance(data, dict)
+    blueprint = Blueprint(data)
+
+    parsed_import_url = yarl.URL(url)
+    suggested_filename = f"homeassistant/{parsed_import_url.parts[-1][:-5]}"
+    return ImportedBlueprint(suggested_filename, raw_yaml, blueprint)
+
+
 async def fetch_blueprint_from_url(hass: HomeAssistant, url: str) -> ImportedBlueprint:
     """Get a blueprint from a url."""
     for func in (
         fetch_blueprint_from_community_post,
         fetch_blueprint_from_github_url,
         fetch_blueprint_from_github_gist_url,
+        fetch_blueprint_from_website_url,
     ):
-        try:
+        with suppress(UnsupportedUrl):
             imported_bp = await func(hass, url)
             imported_bp.blueprint.update_metadata(source_url=url)
             return imported_bp
-        except UnsupportedUrl:
-            pass
 
-    raise HomeAssistantError("Unsupported url")
+    raise HomeAssistantError("Unsupported URL")

tests/components/blueprint/test_importer.py

@@ -162,3 +162,30 @@ async def test_fetch_blueprint_from_github_gist_url(
     assert imported_blueprint.blueprint.inputs == snapshot
     assert imported_blueprint.suggested_filename == "balloob/motion_light"
     assert imported_blueprint.blueprint.metadata["source_url"] == url
+
+
+async def test_fetch_blueprint_from_website_url(
+    hass: HomeAssistant, aioclient_mock: AiohttpClientMocker
+) -> None:
+    """Test fetching blueprint from url."""
+    aioclient_mock.get(
+        "https://www.home-assistant.io/blueprints/awesome.yaml",
+        text=Path(
+            hass.config.path("blueprints/automation/test_event_service.yaml")
+        ).read_text(),
+    )
+
+    url = "https://www.home-assistant.io/blueprints/awesome.yaml"
+    imported_blueprint = await importer.fetch_blueprint_from_url(hass, url)
+    assert isinstance(imported_blueprint, importer.ImportedBlueprint)
+    assert imported_blueprint.blueprint.domain == "automation"
+    assert imported_blueprint.suggested_filename == "homeassistant/awesome"
+    assert imported_blueprint.blueprint.metadata["source_url"] == url
+
+
+async def test_fetch_blueprint_from_unsupported_url(hass: HomeAssistant) -> None:
+    """Test fetching blueprint from an unsupported URL."""
+    url = "https://example.com/unsupported.yaml"
+
+    with pytest.raises(HomeAssistantError, match=r"^Unsupported URL$"):
+        await importer.fetch_blueprint_from_url(hass, url)