add core features (#14)

Reviewed-on: #14
Co-authored-by: Nicholas Ward <nicholaspward@outlook.com>

migrations/003_inventory.sql

@@ -0,0 +1,37 @@
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE IF NOT EXISTS inventory_locations (
+  id TEXT PRIMARY KEY,
+  name TEXT NOT NULL,
+  position INTEGER NOT NULL,
+  deleted_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS inventory_counts (
+  id TEXT PRIMARY KEY,
+  title TEXT NOT NULL,
+  counted_at TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'open',
+  notes TEXT,
+  created_at TEXT NOT NULL,
+  deleted_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS inventory_count_items (
+  count_id TEXT NOT NULL REFERENCES inventory_counts(id) ON DELETE CASCADE,
+  location_id TEXT REFERENCES inventory_locations(id),
+  ingredient_id TEXT NOT NULL REFERENCES ingredients(id),
+  quantity REAL NOT NULL,
+  unit_id TEXT NOT NULL REFERENCES units(id),
+  unit_cost REAL,
+  extended_cost REAL,
+  PRIMARY KEY (count_id, location_id, ingredient_id)
+);
+
+-- Seed baseline standard locations if table is empty
+INSERT OR IGNORE INTO inventory_locations (id, name, position, deleted_at) VALUES
+  ('loc_walk_in', 'Walk-in Cooler', 1, NULL),
+  ('loc_dry_storage', 'Dry Storage', 2, NULL),
+  ('loc_freezer', 'Freezer', 3, NULL),
+  ('loc_bar', 'Bar & Service', 4, NULL),
+  ('loc_line', 'Prep Line', 5, NULL);