DROP TABLE IF EXISTS Users;
DROP TABLE IF EXISTS Posts;
DROP TABLE IF EXISTS Answers;
DROP TABLE IF EXISTS Reaction;

CREATE TABLE Users
(
    id              bigserial PRIMARY KEY,
    username        varchar(255) NOT NULL,
    password        varchar(255) NOT NULL,
    deleted         timestamp WITH TIME ZONE default NULL
);

CREATE TABLE Posts
(
    id              bigserial PRIMARY KEY,
    author          bigserial REFERENCES Users(id) NOT NULL,
    title           varchar(255) NOT NULL,
    content         varchar(1023) NOT NULL,
    postDate        timestamp WITH TIME ZONE NOT NULL DEFAULT now(),
    postLocation    Point NOT NULL,
    deleted         timestamp WITH TIME ZONE default NULL
);

CREATE TABLE Comments
(
    id              bigserial PRIMARY KEY,
    parent          bigserial REFERENCES Posts NOT NULL,
    child           bigserial REFERENCES Posts NOT NULL,
    deleted         timestamp WITH TIME ZONE default NULL
);

CREATE TABLE Reaction
(
    id              bigserial PRIMARY KEY,
    userid          bigserial REFERENCES Users NOT NULL,
    post            bigserial REFERENCES Posts(id) NOT NULL,
    positive        boolean DEFAULT NULL,
    deleted         timestamp WITH TIME ZONE default NULL
)