Refactor the conversation integration (#27839)

* Refactor the conversation integration

* Lint

tests/components/conversation/test_util.py

@@ -0,0 +1,55 @@
+"""Test the conversation utils."""
+from homeassistant.components.conversation.util import create_matcher
+
+
+def test_create_matcher():
+    """Test the create matcher method."""
+    # Basic sentence
+    pattern = create_matcher("Hello world")
+    assert pattern.match("Hello world") is not None
+
+    # Match a part
+    pattern = create_matcher("Hello {name}")
+    match = pattern.match("hello world")
+    assert match is not None
+    assert match.groupdict()["name"] == "world"
+    no_match = pattern.match("Hello world, how are you?")
+    assert no_match is None
+
+    # Optional and matching part
+    pattern = create_matcher("Turn on [the] {name}")
+    match = pattern.match("turn on the kitchen lights")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen lights"
+    match = pattern.match("turn on kitchen lights")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen lights"
+    match = pattern.match("turn off kitchen lights")
+    assert match is None
+
+    # Two different optional parts, 1 matching part
+    pattern = create_matcher("Turn on [the] [a] {name}")
+    match = pattern.match("turn on the kitchen lights")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen lights"
+    match = pattern.match("turn on kitchen lights")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen lights"
+    match = pattern.match("turn on a kitchen light")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen light"
+
+    # Strip plural
+    pattern = create_matcher("Turn {name}[s] on")
+    match = pattern.match("turn kitchen lights on")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen light"
+
+    # Optional 2 words
+    pattern = create_matcher("Turn [the great] {name} on")
+    match = pattern.match("turn the great kitchen lights on")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen lights"
+    match = pattern.match("turn kitchen lights on")
+    assert match is not None
+    assert match.groupdict()["name"] == "kitchen lights"