feat: add schema v1 ddl for schedule_rules and task_definitions

custom_components/nestquest/schema.py

@@ -12,6 +12,24 @@ caller/DAO rather than a DB default, per the feature guardrails.  No
 produced by callers is not fixed yet (``datetime.isoformat()`` may
 include microseconds, changing the length), so enforcing a fixed length
 here would reject valid values.  Only non-null is enforced for now.
+
+Date policy: ``start_date``/``end_date`` are ISO date strings (YYYY-MM-DD,
+no time component) compared lexically by the ``end_date >= start_date``
+CHECK; due_date/due_time string shapes are caller-validated by the rule
+engine and DAO layers, not by DDL.
+
+``weekday_set`` format: comma-separated weekday integers (CSV), 0 =
+Monday .. 6 = Sunday, e.g. ``'0,2,4'`` for Mon/Wed/Fri.  Chosen over JSON
+because it sorts, compares and parses trivially in SQL.
+
+Rule-type coherence: two CHECKs enforce that ``weekly`` carries a
+non-null ``weekday_set``, ``monthly`` carries a ``day_of_month`` or an
+``nth_weekday``, ``yearly`` carries a ``month``, and ``daily``/``custom``
+carry none of the month-specific fields.  Relaxed deliberately: the DDL
+does NOT forbid ``month`` on weekly/monthly rules (an "every 2 weeks"
+rule or a monthly rule could later be pinned to a month) nor extra
+fields on weekly/monthly/yearly rules generally, so the CHECKs only
+reject what the rule engine definitively cannot express now.
 """
 from __future__ import annotations
 
@@ -40,9 +58,50 @@ SCHEMA_V1_ADMIN_USERS_DDL: list[str] = [
     """,
 ]
 
+SCHEMA_V1_SCHEDULE_RULES_DDL: list[str] = [
+    """
+    CREATE TABLE IF NOT EXISTS schedule_rules (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        rule_type TEXT NOT NULL CHECK (rule_type IN ('daily', 'weekly', 'monthly', 'yearly', 'custom')),
+        interval INTEGER NOT NULL DEFAULT 1 CHECK (interval >= 1),
+        weekday_set TEXT,
+        day_of_month INTEGER CHECK (day_of_month IS NULL OR (day_of_month >= 1 AND day_of_month <= 31)),
+        nth_weekday INTEGER CHECK (nth_weekday IN (-1, 1, 2, 3, 4, 5)),
+        month INTEGER CHECK (month IS NULL OR (month >= 1 AND month <= 12)),
+        start_date TEXT NOT NULL,
+        end_date TEXT,
+        CHECK (end_date IS NULL OR end_date >= start_date),
+        CHECK (
+            (rule_type = 'weekly' AND weekday_set IS NOT NULL)
+            OR (rule_type = 'monthly' AND (day_of_month IS NOT NULL OR nth_weekday IS NOT NULL))
+            OR (rule_type = 'yearly' AND month IS NOT NULL)
+            OR (rule_type IN ('daily', 'custom') AND day_of_month IS NULL AND nth_weekday IS NULL AND month IS NULL)
+        )
+    )
+    """,
+]
+
+SCHEMA_V1_TASK_DEFINITIONS_DDL: list[str] = [
+    """
+    CREATE TABLE IF NOT EXISTS task_definitions (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        title TEXT NOT NULL,
+        description TEXT,
+        icon TEXT,
+        child_id INTEGER NOT NULL REFERENCES children(id),
+        schedule_rule_id INTEGER NOT NULL REFERENCES schedule_rules(id),
+        due_time TEXT,
+        is_active INTEGER NOT NULL DEFAULT 1 CHECK (is_active IN (0, 1)),
+        created_at TEXT NOT NULL
+    )
+    """,
+]
+
 SCHEMA_V1_STATEMENTS: list[str] = [
     *SCHEMA_V1_CHILDREN_DDL,
     *SCHEMA_V1_ADMIN_USERS_DDL,
+    *SCHEMA_V1_SCHEDULE_RULES_DDL,
+    *SCHEMA_V1_TASK_DEFINITIONS_DDL,
 ]