-- Catalogue objects (the inventory-minimum core). One row = one object or a group.
CREATE TABLE object (
    id                UUID PRIMARY KEY,
    object_number     TEXT NOT NULL UNIQUE CHECK (object_number <> ''),
    object_name       TEXT NOT NULL CHECK (object_name <> ''),
    number_of_objects INTEGER NOT NULL DEFAULT 1 CHECK (number_of_objects >= 1),
    brief_description TEXT CHECK (brief_description <> ''),
    current_location  TEXT CHECK (current_location <> ''),
    current_owner     TEXT CHECK (current_owner <> ''),
    recorder          TEXT CHECK (recorder <> ''),
    recording_date    DATE,
    visibility        TEXT NOT NULL DEFAULT 'draft'
                          CHECK (visibility IN ('draft', 'internal', 'public')),
    -- updated_at is maintained by the repository (set to now() on update).
    created_at        TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at        TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX object_visibility_idx ON object (visibility);