CREATE TABLE users
(
    id   INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    name STRING UNIQUE NOT NULL
);

-- for development only, replace with properly hashed passwords later
CREATE TABLE challenges_plain_password
(
    user_id  INTEGER PRIMARY KEY NOT NULL,
    password STRING              NOT NULL
);

CREATE TABLE rooms
(
    id            INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    name          STRING UNIQUE NOT NULL,
    topic         STRING        NOT NULL,
    message_count INTEGER       NOT NULL DEFAULT 0
);

CREATE TABLE messages
(
    room_id INTEGER NOT NULL,
    id      INTEGER NOT NULL, -- unique per room, sequential in one room
    content STRING  NOT NULL,
    PRIMARY KEY (room_id, id)
);

CREATE TABLE memberships
(
    user_id INTEGER NOT NULL,
    room_id INTEGER NOT NULL,
    status  INTEGER NOT NULL, -- 0 for not-joined, 1 for joined, 2 for banned
    PRIMARY KEY (user_id, room_id)
);