-- Type: DO
-- Name: received_emails
-- Description: Create a table for received emails

BEGIN;

CREATE TABLE omnivore.received_emails (
    id uuid PRIMARY KEY DEFAULT uuid_generate_v1mc(),
    user_id uuid NOT NULL REFERENCES omnivore.user ON DELETE CASCADE,
    "from" text NOT NULL,
    "to" text NOT NULL,
    subject text NOT NULL DEFAULT '',
    "text" text NOT NULL,
    html text NOT NULL DEFAULT '',
    "type" text NOT NULL,
    created_at timestamptz NOT NULL DEFAULT current_timestamp,
    updated_at timestamptz NOT NULL DEFAULT current_timestamp
);

CREATE TRIGGER received_emails_modtime BEFORE UPDATE ON omnivore.received_emails
    FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();

GRANT SELECT, INSERT, UPDATE, DELETE ON omnivore.received_emails TO omnivore_user;

-- Create a trigger to keep the most recent 20 emails for each user
CREATE OR REPLACE FUNCTION omnivore.delete_old_received_emails()
    RETURNS trigger AS $$
    BEGIN
        DELETE FROM omnivore.received_emails
        WHERE id NOT IN (
            SELECT id FROM omnivore.received_emails
            WHERE user_id = NEW.user_id
            ORDER BY created_at DESC
            LIMIT 20
        );
        RETURN NEW;
    END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER delete_old_received_emails
    AFTER INSERT ON omnivore.received_emails
    FOR EACH ROW EXECUTE PROCEDURE omnivore.delete_old_received_emails();

COMMIT;